WALKER APPARATUS AND BACKREST THEREFOR

Field of the Invention

[0001] There is provided a walker apparatus. In particular, there is provided a walker apparatus and a backrest therefor. Description of the Related Art

[0002] It is known to have foldable walkers that include backrests. On the one hand, it may be desirable to provide a walker that is light weight and which includes relatively few parts. However, users with mobility issues may also have other medical deficiencies and walkers that include backrests in the form of a single band may be relatively uncomfortable for the user's back.

[0003] On the other hand, walkers with large backrests, while offering more back support, may be relatively bulky and may hamper the user's ability to fold the walker. Also, such backrests may inhibit the ability of the user to see past the walker, which may be particularly dangerous for users who may already have visual impairment challenges, for example.

[0004] There is accordingly a need for a backrest that promotes greater comfort to the user while at the same time not unduly hindering the foldability of the walker apparatus or impairing the user's field of vision while pushing the walker apparatus. BRIEF SUMMARY OF INVENTION

[0005] There is thus provided a walker apparatus disclosed herein that overcomes the above disadvantages. [0006] There is accordingly provided a walker apparatus having a pair of spaced- apart, upright frame members. The walker apparatus includes a seat operatively connected to the upright frame members. The walker apparatus has a backrest cantilevered from the frame members. The backrest includes a pair of spaced-apart straps.

[0007] There is further provided a walker apparatus having a pair of spaced-apart, upright frame members. The walker apparatus includes a seat operatively connected to the upright frame members. The walker apparatus has a backrest cantilevered from the frame members. The backrest is horizontally-split.

[0008] There is also provided a walker apparatus having a pair of spaced-apart, upright frame members. The walker apparatus includes a pair of arcuate-shaped support members extending outwards from the frame members. The walker apparatus includes a seat connected to and extending between the support members. The walker apparatus includes a pair of coupling members connecting the frame members and the support members together. Each of the coupling members has an upright tubular portion which at least partially extends around part of a respective one of the frame members. Each of the coupling members has an arcuate-shaped tubular portion which at least partially extends around part of a respective one of the support members.

BRIEF DESCRIPTION OF DRAWINGS

[0009] The invention will be more readily understood from the following description of preferred embodiments thereof given, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a front, side perspective view of a walker apparatus having a backrest according to one aspect, the walker apparatus being shown in an unfolded position;

Figure 2 is a fragmentary, bottom, rear perspective view of the walker apparatus of Figure 1, showing the folding mechanism of the walker apparatus, the walker apparatus being shown with its collapsible basket being removed;

Figure 3 is a rear, side perspective view of the backrest of Figure 1; Figure 4 is a first side elevation view of the backrest of Figure 3;

Figure 5 is a second side elevation view of the backrest of Figure 3;

Figure 6 is a top plan view of the backrest of Figure 3;

Figure 7 is a bottom plan view of the backrest of Figure 3;

Figure 8 is a rear elevation view of the backrest of Figure 3; Figure 9 is a front elevation view of the backrest of Figure 3;

Figure 10 is a side perspective view of a handle brake assembly of the walker apparatus of Figure 1, together with an upright frame member thereof shown in fragment; Figure 11 is a side perspective view of the walker apparatus in fragment showing its handle brake assemblies and backrest connected thereto as well as its upright frame members in fragment, the backrest being shown in a first, retracted position;

Figure 12 is a side, rear perspective view of the walker apparatus of Figure 11, the walker apparatus being shown in fragment with the backrest being shown in a second, extended position; Figure 13 is a rear perspective view of the walker apparatus of Figure 1 shown in a folded position; Figure 14 is a front, side perspective view of a handle for the walker apparatus of Figure i ;

Figure 15 is a first side elevation view of the handle of Figure 14; Figure 16 is a second side elevation view of the handle of Figure 14; Figure 17 is a top plan view of the handle of Figure 14; Figure 18 is a bottom plan view of the handle of Figure 14;

Figure 19 is a front elevation view of the handle of Figure 14;

Figure 20 is a rear elevation view of the handle of Figure 14; Figure 21 is a front, side perspective view of the walker apparatus of Figure 1 with a user gripping the upper ends of the upright frame members of the walker apparatus and looking through the backrest and past the walker apparatus towards the front thereof;

Figure 22 is a side perspective view of a handle brake assembly, together with an upright frame member shown in fragment, for a walker apparatus according to a second aspect;

Figure 23 is a side perspective view of the walker apparatus of Figure 22 showing its handle brake assemblies and backrest connected thereto as well as its upright frame members in fragment; Figure 24 is a sectional view of the handle brake assemblies of the walker apparatus taken along line 24-24 of Figure 22;

Figure 25 is a rear perspective view of a walker apparatus having a backrest according to a third aspect;

Figure 26 is a rear, side perspective view of the backrest of the walker apparatus of Figure 25; Figure 27 is a first side elevation view thereof; Figure 28 is a second side elevation view thereof; Figure 29 is a top plan view thereof;

Figure 30 is a bottom plan view thereof;

Figure 31 is a rear elevation view thereof; Figure 32 is a front elevation view thereof;

Figure 33 is a fragmentary, side perspective view of the walker apparatus of Figure 25 showing its handle brake assemblies and backrest connected thereto; Figure 34 is a side elevation view of a walker apparatus according to a fourth aspect;

Figure 35 is a fragmentary, rear elevation view of a frame member of the walker apparatus of Figure 34; Figure 36 is a side elevation view of a walker apparatus according to a fifth aspect; Figure 37 is a top, rear perspective view of the walker apparatus of Figure 36, the walker apparatus being shown in fragment;

Figure 38 is a fragmentary, side perspective view of a walker apparatus according to a sixth aspect;

Figure 39 is a fragmentary, side perspective view of a walker apparatus according to a seventh aspect;

Figure 40 is a fragmentary, top plan view thereof;

Figure 41 is a fragmentary, side perspective view of a walker apparatus according to an eighth aspect;

Figure 42 is a fragmentary, plan view of housing which forms part of an adjustment assembly for the walker apparatus of Figure 41;

Figure 43 is a fragmentary, side perspective view of a proximal end of a backrest of the walker apparatus of Figure 41, the proximal ends of the backrest forming further parts of the adjustment assembly for the walker apparatus;

Figure 44 is a fragmentary, side perspective view of the proximal end of the backrest of Figure 43 engaging with the housing of the walker apparatus of Figure 42 for connecting the backrest to the rest of the walker apparatus thereby;

Figure 45 is a fragmentary, top plan view of the walker apparatus of Figure 41;

Figure 46 is a fragmentary, rear perspective view of a walker apparatus according to a ninth aspect; Figure 47 is a fragmentary, side perspective view of a walker apparatus according to a tenth aspect;

Figure 48 is a rear elevation view of a backrest for a walker apparatus according to an eleventh aspect, the backrest being shown laid out flat and unattached to the walker apparatus;

Figure 49 is a front elevation view thereof; Figure 50 is a rear elevation view of a backrest for a walker apparatus according to a twelve aspect, the backrest being shown laid out flat and unattached to the walker apparatus;

Figure 51 is a front elevation view thereof;

Figure 52 is a fragmentary, rear perspective view of a walker apparatus according to a thirteenth aspect;

Figure 53 is a fragmentary, side perspective view thereof;

Figure 54 is a fragmentary, top plan view thereof;

Figure 55 is a fragmentary, side perspective view of a walker apparatus according to a fourteenth aspect;

Figure 56 is a fragmentary, rear perspective view of a walker apparatus according to a fifteenth aspect;

Figure 57 is a fragmentary, side perspective view thereof; and

Figure 58 is a fragmentary, top plan view thereof. DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Referring to the drawings and first to Figure 1, there is shown a mobility aid device, in this example a walker apparatus 40 according to a first aspect. The walker apparatus is shown in Figure 1 to 21. As seen in Figure 1, the walker apparatus 40 includes a pair of spaced-apart upright, frame members 42 and 44 positioned at respective spaced-apart sides 43 and 45 of the walker apparatus adjacent the rear 47 of the walker apparatus. Each of the frame members includes a lower end and an upper end spaced- apart from the lower end, as shown by lower end 46 and upper end 48 for frame member 42.

[0011] Each of the frame members 42 and 44 is telescoping and includes an inner tube 49 through which extends a plurality of apertures 51 and an outer tube 53 shaped to receive the inner tube. The walker apparatus 40 has an adjustment mechanism 59 for selectively adjusting and locking the telescoping tubes together. In this example the adjustment mechanism includes thumb screws 63. The thumb screws may be inserted through selective ones of the apertures 51 to fixedly adjust the height of the telescoping tubes 49 and 53. This enables the height of the walker apparatus 40 to be adjusted to provide an optimized height for the user 65 seen in Figure 21. [0012] Referring back to Figure 1, the walker apparatus 40 includes a pair of support members 41 and 50 which are arc-shaped in this example. The support members include proximal ends connected to respective ones of the frame members, distal ends spaced- apart the proximal ends, and apexes positioned between the ends. This is shown by support member 50 having a proximal end 52 coupled to frame member 42, a distal end 54 spaced-apart from the proximal end and an apex 55 interposed between and spaced- apart above its ends 52 and 54. The proximal ends of the support members connect to the frame members at locations adjacent to and spaced-apart from the lower ends 46 of the frame members in this example. Rods 57 extend from the lower ends 46 of respective ones of the frame members 42 and connect to respective ones of the support members 50 adjacent to the distal ends 54 of the support members in this example.

[0013] The walker apparatus 40 includes a plurality of wheel assemblies rotatably connected to the lower ends of the frame members 42 and 44 and distal ends 54 of the support members 50. This is shown by wheel assembly 56 rotatably connecting to the end 46 of frame member 42. Each of the wheel assemblies includes a ground-engaging wheel 58. The walker apparatus 40 includes a collapsible basket 60 in this example. As seen in Figure 1, the basket selectively connects to and extends between the support members 41 and 50 adjacent to the distal ends 54 of the support members. The basket 60 is positioned adjacent to the front 61 of the walker apparatus in this example. The walker apparatus 40 further includes a seat assembly 62, in this example comprising a seat 64 having two substantially planar portions 66 and 68 pivotally connected together. Portions 66 and 68 of the seat assembly pivotally connect to respective ones of the support members 50 and 41 at the apexes 55 of the support members in this example. Seat 64 thus operatively connects to the upright frame members 42 and 44.

[0014] As best seen in Figure 2, the walker apparatus 40 includes a folding mechanism 70. The folding mechanism includes in this example an inner frame assembly 73 formed of two inner frame members 75 and 77 which are hingedly connected together and which pivotally connect to and extend from respective ones of the rods 57. The folding mechanism 70 in this example includes a pair of intercrossing link members 79 and 81 that pivotally connect to and extend from respective portions 66 and 68 of the seat assembly 62. The link members 79 and 81 also pivotally connect to inner frame members 77 and 75, respectively of the inner frame assembly 73. The folding mechanism 70 thus operatively connects to and is interposed between frame members 42 and 44 of the walker apparatus 40.

[0015] The folding mechanism is configured to selectively enable the walker apparatus to fold laterally, with the frame members 42 and 44 and support members 41 and 50 coming together thereby, as shown in Figure 13. The folding mechanism thus enables the walker apparatus 40 to be laterally-foldable along a folding axis 71 seen in Figure 13. Folding mechanism per se for walker apparatuses, including their various parts and functionings, are well known to those skilled in the art and thus folding mechanism 70 will not be described in further detail. [0016] Referring back to Figure 1, the walker apparatus 40 includes a pair of handle brake assemblies 72 and 74 that connect to and extend from respective ones of the upper ends 48 of the frame members 42 and 44. Actuation of the handle brake assemblies selectively causes at least one of the wheels 58 to brake.

[0017] The walker apparatus to this point in the description is described in further detail in United States Patent No. 8,083,239 to Liu. Examples of telescoping tubes, wheel assemblies, folding mechanisms and braking assemblies for walkers per se, including their various parts and functionings, are well known to those skilled in the art and thus will not be described in further detail.

[0018] Referring to Figure 1, each of the handle brake assemblies 72 and 74 includes a handle 76, actuation of which selectively causes at least one of the wheels 58 to brake. The handles are best shown in Figures 14 to 20. Each handle 76 is generally an elongate loop in shape and encloses an aperture 78 through which a user's hands may partially extend. Each handle has an elongated top potion 80 which is u-shaped in cross-section for receiving a thumb of the user. The operation of handle brake assemblies per se, including their various parts and their functionings, is well known to those skilled in the art and therefore will not be described in detail.

[0019] As seen in Figure 1, each of the handle brake assemblies has a housing to which respective ones of the handles 76 pivotally connect, as shown by housing 82 for assembly 72. Referring now to Figure 10, each housing is generally a rectangular prism in shape. Each housing 82 has a proximal end 84 which operatively connects to the upper end 48 of its respective frame member 42, and a distal end 86 which is spaced-apart from its proximal end. Each housing has a pair of spaced-apart sides, including an outer side 88 and an inner side 89, each of which is generally rectangular in shape. Each housing 82 includes a rounded top 90 and flat bottom 92 in this example spaced-apart from its top. The sides 88 and 89, tops and bottoms of the housings extend from the proximal ends 84 to the distal ends 86 of the housings. The sides of the housings 82 extend from the tops 90 to the bottoms 92 of the housings. Each brake assembly 72 includes a recessed portion 94 which extends from the distal end 86 of the housing 82 towards the proximal end 84 of the housing. The recessed portion also extends downwards from the top 90 of the housing towards the bottom 92 of the housing by outer side 88 seen in Figure 10 in this example. Referring to Figure 12, the recessed portion 94 extends fully downwards from the top 90 of the housing 82 to the bottom 92 of the housing adjacent side 89 in this example.

[0020] As seen in Figure 10, each handle brake assembly 72 includes a plurality of apertures extending therein at the recessed portion 94 and adjacent the outer side 88 of its housing 82. This is shown for assembly 72 by an outer aperture 96 adjacent to distal end 86 of the housing 82, an inner aperture 98 spaced-apart from aperture 96 in the direction of proximal end 84 of the housing, and an intermediate aperture 100 positioned between apertures 96 and 98.

[0021] As seen in Figure 1, the walker apparatus 40 includes a backrest 102 cantilevered from the frame members 42 and 44. The backrest is flexible in this example and is arcuate-shaped when the walker apparatus is in its unfolded mode seen in Figure 1. The backrest 102, according to one aspect, comprises a pair of spaced-apart, arcuate- shaped elongate members, in this example in the form of straps including an upper strap 104 and a lower strap 106. The straps connect together at common respective ends, in this example proximal ends 108 and 110 of the backrest 102. The straps 104 and 106 extend along the front 61 and sides 43 and 45 of the walker apparatus 40 in this example.

[0022] Referring to Figure 3, the backrest includes a top 112 on the upper strap 104 and a bottom 114 on lower strap 106. The top and bottom of the backrest 102 are generally arcuate or u-shaped, as seen in Figures 6 and 7, respectively. As best seen in Figure 3, the upper strap 104, as well as top 112, are u-shaped and upwardly-convex in cross-section in this example. The lower strap 106 is substantially rectangular in cross- section in this case. Referring to Figure 6, the backrest 102 includes a concave-shaped interior 116 and a convex-shaped exterior 118. As seen in Figure 3, the interior and exterior of the backrest extend from the top 112 to the bottom 114 of the backrest.

[0023] The backrest 102 has an inner portion 120 which in this example is formed of polypropylene. However, this is not strictly required and other materials may be used in other embodiments. The inner portion 120 of the backrest 102 includes lower strap 106 and an inner half 122 of the upper strap 104. The inner portion 120 of the backrest is positioned within the interior 116 of the backrest. As seen in Figure 6, the inner portion 120 of the backrest and inner half 122 of the upper strap 104 are arcuate-shaped, or u- shaped in top profile in this example. Referring back to Figure 3, the inner portion of the backrest 102 has a width Wi extending from the top 112 to the bottom 114 of the backrest. The inner portion 120 of the backrest 102 is substantially rectangular in cross- section with the exception of at the top 112 of the backrest, where the inner portion at least partially curves outwards towards exterior 118 of the backrest.

[0024] As seen in Figure 12, the inner portion 120 of the backrest 102, is shaped at the proximal ends 108 and 110 of the backrest to be received over recessed portions 94 of the handle brake assemblies at inner sides 89 of the housings. Referring to Figure 11, the cross-sectional thickness of the backrest 102, at its ends 108 and 110, is generally equal to the extent to which recessed portions 94 are recessed from the rest of the housings 82 of the handle brake assemblies in this example.

[0025] Referring back to Figure 3, the backrest has an outer portion 124 connected to and extending outwards from its inner portion 120. The outer portion of the backrest 102 comprises an outer half 126 of the upper strap 104. The outer half 126 is positioned adjacent to the exterior 118 of the backrest. The outer portion 124 of the backrest 102 in this example is formed by thermoplastic polyurethane. However, this is not strictly required and other materials may be used in other embodiments. As seen in Figure 6, the outer portion 124 of the backrest 102 and outer half 126 of strap 104 are arcuate-shaped or u-shaped in top profile in this example. Referring back to Figure 3, the outer portion of the backrest has a width Wo extending from the top 112 of the backrest in a downwards direction to a lower peripheral edge 125 of the outer portion of the backrest. The width of the outer portion 124 of the backrest 102 is generally about half of the width Wi of the inner portion 120 of the backrest in this example. The outer portion of the backrest is substantially rectangular in cross-section with the exception of at the top 112 of the backrest, where it curves inwards towards interior 116 of the backrest and connects to the inner portion 120 of the backrest. Referring to Figure 11, the outer portion 124 of the backrest 102, at the proximal ends 108 and 110 of the backrest, is shaped to be received over recessed portions 94 of respective ones of the handle brake assemblies at sides 88. This is shown in Figure 11 by outer portion 124 at proximal end 108 of the backrest 102 being received over recessed portion 94 of assembly 72.

[0026] Referring to Figure 3, the backrest 102 includes a pair of apertures, each extending through the outer portion 124 of the backrest at locations adjacent to respective ones of the proximal ends 108 and 110 of the backrest. This is seen in Figure 3 by aperture 128 extending through the outer portion 124 of the backrest adjacent proximal end 108 of the backrest.

[0027] As seen with reference to Figures 1 and 10, the backrest includes an adjustment mechanism 130 that enables a user to adjust the extent to which the backrest 102 extends from the frame members 42 and 44 of the walker apparatus 40 to accommodate different body types. In this case, the adjustment mechanism includes a plurality of female connectors, in this example in the form of horizontally spaced-apart apertures 96, 98 and 100 seen in Figure 10, portions 101 of assembly 72 adjacent to said apertures, apertures 128 extending through outer portions 124 of the backrest 102 seen in Figure 11 and portions 103 of the backrest 102 adjacent to apertures 128. As seen in Figure 1 1, the adjustment mechanism 130 also includes a plurality of male connectors, in this case fasteners, in this example screws 132 which extend through respective ones of apertures 128 and engage with selectively ones of apertures 96, 98 and 100 seen in Figure 10.

[0028] When the screws extend through inner apertures 98 seen in Figure 10, the backrest 102 may be in a first, retracted position, seen in Figure 11, in which the proximal ends 108 and 110 of the backrest fully extend around the recessed portions 94 of the assemblies 72 and 74. When the screws 132 seen in Figure 11 extend through outer apertures 96 seen in Figure 10, the backrest may be in a second, extended position, seen in Figure 12. The extended position of the backrest seen in Figure 12 is more spaced- apart from frame members 42 and 44 compared to the retracted position of the backrest shown in Figure 11. The backrest 102 is thus selectively connectable to a plurality of different spaced-apart positions along the handle brake assembly 72, with positioning of the straps 104 and 106 being adjustable thereby.

[0029] Referring now to Figure 11, the upper strap 104 extends from the upper ends 48 of the frame members 42 and 44. As seen in Figure 4, the upper strap in this example extends in an upwardly curved manner, in this case in an upwardly-concave manner, from respective ones of the frame members. Lower strap 106 extends in this example in a downwardly curved manner, and in this case, a downwardly-concave manner. The straps 104 and 106 thus extend from the frame members 42 and 44 in outwardly divergent directions relative to each other. [0030] As best seen in Figure 12, the backrest 102 has a central portion 134 positioned between the frame members 42 and 44 of the walker apparatus 40. The straps 104 and 106 are increasingly spaced-apart away as they extend outwards from proximal ends 108 and 110 of the backrest 102 and towards the central portion 134 of the backrest. As seen in Figure 13, the straps are most spaced-apart relative to each other in a region 135 that aligns with the folding axis 71 of the walker apparatus 40.

[0031] Referring Figure 21, the backrest 102 has at least one opening extending therethrough, , in this example in the form of an elongated aperture 136 for permitting a user's vision past the backrest when the user grips the upright frame members 42 and 44. This is seen by line of vision having numeral 137 extending from eyes 139 of user 65 and extending through aperture 136 to ground 141 therebelow. As seen in Figure 9, the aperture is oval-shaped in this example. The aperture 136 is positioned between the straps 104 and 106, shown in Figure 1 in this example, and extends in a substantially horizontal direction in this example. The aperture 136 has spaced-apart ends 138 and 140 which are tapered and rounded in this example. Ends 138 and 140 are positioned adjacent to proximal ends 108 and 110, respectively, of the backrest 102 in this example. As seen in Figure 1, the tapered ends of the aperture 136 and proximal ends of the backrest are positioned adjacent to the sides 43 and 45 of the walker apparatus 40. Straps 104 and 106 may be said to comprise a single backrest that is horizontally-split.

[0032] The above set out structure may result in a backrest that is more compact, lighter, and more ergonomically friendly, resulting in a walker apparatus 40 that may be easier and safer to use, and easier to fold compared to walker backrests and walkers of the known prior art.

[0033] Figures 22 to 24 show a walker apparatus 40.1 according to a second aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 1 to 21 with the addition of decimal extension ".1". Walker apparatus 40.1 is substantially the same as walker apparatus 40 shown in Figures 1 to 21, with backrest 102.1 being cantilevered to upper ends 48.1 of frame members 42.1 and 44.1 and having an aperture 136.1 extending therethrough, but with apparatus 40.1 having the following differences.

[0034] As seen in Figure 22, recessed portions 94.1 of the housings 82.1 extend from the top 90.1 to the bottom 92.1 of the housings in this example at the outer sides 88.1 thereof. Referring to Figure 23, the proximal ends of the backrest 102.1 at the exterior 118.1 of the backrest 102.1 extend over the recessed portions of the housing 82.1 from the top to the bottom of the housing, as shown by proximal end 108.1 of the backrest. [0035] As seen in Figures 22 and 24, walker apparatus 40.1 further includes a pair of slide rail assemblies connected to respective ones of the handle brake assemblies, as shown by slide rail assembly 142 for handle brake assembly 72.1. Referring to Figure 24, each slide rail assembly comprises an elongate male portion, in this example a bracket 144 which, in this example, is connected to and which extends along the proximal end

108.1 of the backrest 102.1. The brackets are t-shaped in cross-section in this example. Each slide rail assembly 142 includes an elongate female portion, in this example in the form of a recess 146, which, in this example, extends parallel to and inwards from side 88.1 of housing 82.1 adjacent to recessed portion 94.1 of the housing. Each recess 146 is positioned adjacent to and is spaced-apart from bottom 92.1 of its housing in this example. Each recess 146 is shaped to slidably receive bracket 144 and is T-shaped in cross-section in this example, as seen in Figure 22. The backrest 102.1 thus connects to and is extendable from the frame members 42.1 via the slide rail assemblies 142. Alternatively, brackets 144 may connect to the housing 82.1 and an elongate female portion may connect to, or alternatively, be a part of the proximal ends 108.1 of the backrest 102.1.

[0036] Figures 25 to 33 show a walker apparatus 40.2 according to a third aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 1 to 21 with the addition of decimal extension ".2". Walker apparatus 40.2 is generally similar to walker apparatus 40 shown in Figures 1 to 21, with backrest 102.2 being cantilevered to upper ends 48.2 of frame members 42.2 and 44.2 and having an aperture 136.2 extending therethrough, but with the apparatus having the following differences.

[0037] In this case, as best seen in Figure 33, straps 104.2 and 106.2 extend along the front 61.2 of the walker apparatus. Referring to Figure 25, the backrest 102.2 includes a cushioning member 148 located at and positioned within the concave-shaped interior

116.2 of the backrest. The cushioning member has an aperture 149 that coincides with and is coextensive with aperture 136.2 of the backrest. Ends 138.2 and 140.2 of aperture 136.2 are inwardly spaced-apart from proximal ends 108.2 and 110.2 of the backrest 102.2 and frame members 42.2 and 44.2. Backrest 102.2, straps 104.2 and 106.2 and aperture 136.2 are substantially symmetrical about the vertical, central axis 150 of the backrest and are substantially symmetrical about the horizontal axis 152 of the backrest in this case. The horizontal axis of the backrest and the upper ends 48.2 of the frame members 42.2 and 44.2 of walker apparatus 40.2 align within a horizontal plane 153 in this example. Strap 104.2 extends upwards from the horizontal plane in this example and strap 106.2 extends downwards from the horizontal plane as the straps extend towards the central portion 134.2 of the backrest.

[0038] Figures 34 and 35 show a walker apparatus 40.3 according to a fourth aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 1 to 21 with the addition of decimal extension ".3". Walker apparatus 40.3 is generally similar to walker apparatus 40 shown in Figures 1 to 21, with backrest 102.3 being cantilevered to upper ends 48.3 of frame members 42.3 and 44.3 and having an aperture 136.3 extending therethrough, but with the apparatus having the following differences.

[0039] In this case, as seen in Figure 34, the straps 104.3 and 106.3 extend outwards from the frame members 42.3 of the walker apparatus 40.3 in an elliptical manner. In this example, the backrest 102.3 is y-shaped when viewed from the side as it extends from the frame members. Similar to the backrest 102.2 shown in Figures 25 to 33, backrest 102.3, straps 104.3 and 106.3 and aperture 136.3 are substantially symmetrical about the vertical, central axis 150.3 of the backrest and are substantially symmetrical about the horizontal axis 152.3 of the backrest in this case.

[0040] The walker apparatus 40.3 includes a height-adjustment mechanism 59.3 for selectively adjusting and locking telescoping tubes 49.3 and 53.3 together. In this example and as best seen in Figure 35, the adjustment mechanism includes a push button 154, instead of a thumb screw, for selecting coupling the tubes together and thus adjusting the height of the walker apparatus.

[0041] Figures 36 and 37 show a walker apparatus 40.4 according to a fifth aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 34 and 35 with decimal extension ".4" replacing previous decimal extension ".3" and being added for numbers not previously having a decimal extension. Walker apparatus 40.4 is generally similar to walker apparatus 40.3 shown in Figures 34 and 35, with backrest 102.4 being cantilevered to upper ends 48.4 of frame members 42.4 and 44.4 of the walker apparatus and having an aperture 136.4 extending therethrough, but with the apparatus having the following differences.

[0042] In this example, backrest 102.4 is u-shaped when viewed from the side as it extends outwards from the frame members 42.4 of the walker apparatus 40.4. As seen in Figure 37, upper strap 104.4 aligns with and tangentially extends from the upper ends 48.4 of the frame members 42.4 and 44.4. Strap 104.4 is spaced-apart from and parallel to lower strap 106.4 in this example. Strap 106.4 and aperture 136.4 are spaced-apart below the upper ends of the frame members 42.4.

[0043] Backrest 102.4 further includes a pair of arc-shaped connecting members 156 and 158 that connect the upper strap 104.4 and lower strap 106.4 together. The straps 4 connect to and extend tangentially from the arc-shaped connecting members. The arc- shaped connecting members 156 and 158 and ends 138.4 and 140.4 of aperture 136.4 are semi-circular in this example and are positioned adjacent to the handle brake assemblies 72.4 and 74.4, respectively. Strap 106.4 is positioned below handles 76.4 of the walker apparatus 40.4. [0044] Similar to cushioning member 148 of walker apparatus 40.2 of Figures 25 to 33, the walker apparatus 40.4 of Figure 37 includes a cushioning member 148.4 located at the concave-shaped interior 116.4 of the backrest 102.4. The cushioning member connects to and extends from the backrest. The cushioning member 148.4 is loop-shaped and arcuate-shaped in this example. The cushioning member has a first curved end 160 outwardly spaced-apart from proximal end 108.4 of the backrest 102.4 and a second curved end 162 outwardly spaced-apart from proximal end 110.4 of the backrest. The cushioning member 148.4 has an elongate upper portion 164 and an elongate lower portion 166, each of which extends between ends 160 and 162 and is cylindrical in shape in this example. The cushioning member is positioned within the interior 116.4 of the backrest 102.4. The upper portion 164 of cushioning member 148.4 connects to and extends inwardly from the upper strap 104.4 and the lower portion 166 of the cushioning member connects to and extends inwardly from the lower strap 106.4 in this example. Aperture 149.4 of the cushioning member is oval-shaped in this example overlaps with aperture 136.4 of the backrest 102.4.

[0045] The walker apparatus 40.4 further comprises a pair of coupling members which selectively couple respective ones of the frame members and support members of the walker apparatus together, as seen by coupling member 161 in Figure 36 coupling together frame member 42.4 and support member 50.4. The coupling members are reshaped in side profile in this example. Each coupling member 161 comprises an upright tubular portion 163 which at least partially extends around portion 165 of a respective one of the frame members, in this example a portion adjacent to push-button 154.4. Each coupling member 161 further comprises an arcuate-shaped tubular portion 167 which at least partially extends around at least part of a respective one of the support members 50.4. Upper ends 171 of the tubular portions 167 align with the apexes 55.4 of the support members and include seat mounts, in this example cylindrical receptacles to which respective portions of the seat 64.4 pivotally connect. Alternatively, upper ends 171 of the tubular portions 167 may comprise elongated rods received by corresponding receptacles on the respective portions of the seat in other embodiments.

[0046] Figure 38 shows a walker apparatus 40.5 according to a sixth aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 34 and 35 with decimal extension ".5" replacing decimal extension ".3" and being added for parts not previous having decimal extensions. Walker apparatus 40.5 is generally similar to walker apparatus 40.3 shown in Figures 34 and 35, with backrest 102.5 being cantilevered to upper ends 48.5 of frame members 42.5 and 44.5 and having an aperture 136.5 extending therethrough, but with the apparatus having the following differences. [0047] Backrest 102.5 includes a cushioning member 148.5 that extends substantially around the straps 104.5 and 106.5. In this example, the cushioning member is in the form of a neoprene cover sewn around the straps. However, this is not strictly required and the cushioning member may be made other materials in other embodiments. [0048] The backrest 102.5 is u-shaped in side profile as the backrest extends from the frame members 42.5 and 44.5 of the walker apparatus 40.5. Upper strap 104.5 extends above the upper ends 48.5 of the frame members of the walker apparatus and lower strap

106.5 extends below the upper ends of the frame members.

[0049] Figures 39 and 40 show a walker apparatus 40.6 according to a seventh aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 36 and 37 with decimal extension ".6" replacing decimal extension ".4" and being added for parts not previous having decimal extensions. Walker apparatus 40.6 is generally similar to walker apparatus 40.4 shown in Figures 36 and 37, with backrest 102.6 being cantilevered to upper ends 48.6 of frame members 42.6 and 44.6 and having an aperture 136.6 extending therethrough, but with the apparatus having the following differences.

[0050] Connecting members 156.6 and 158.6, which connect upper strap 104.6 and lower strap 106.6 together, have a generally elongated s-shape in this example. Ends

138.6 and 140.6 of aperture 136.6 are tapered in this example towards upper strap 104.6. The upper strap extends from connecting members 156.6 and 158.6 at acute angles a relative to the connecting members. As seen in Figure 40, the backrest 102.6 is shaped to form a substantially v-shape when viewed from above in this example when the walker apparatus is folded laterally. The straps of the backrest are substantially inwardly spaced- apart from the support members 41.6 and 50.6.

[0051] Figures 41 to 45 show a walker apparatus 40.7 according to an eighth aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 1 to 21 with the addition of decimal extension ".7". Walker apparatus 40.7 is generally similar to walker apparatus 40 shown in Figures 1 to 21, with backrest 102.7 being cantilevered to upper ends 48.7 of frame members 42.7 and 44.7 and including at least one aperture 136.7 extending therethrough, but with the apparatus having the following differences.

[0052] Backrest 102.7 comprises a plurality of spaced-apart, vertically-extending columns or ribs 168 each of which may be rigid and generally in the shape of a rectangular prism in this example, as seen in Figure 45. Referring back to Figure 41, the backrest is shaped to extend downwards sufficiently far so that it may function to support the lumbar 169 of the user 65 seen in Figure 21.

[0053] The backrest 102.7 further includes a pair of straps in the form of substantially-horizontal and elongate upper and lower bridging members 104.7 and 106.7 which are arcuate-shaped when the walker apparatus 40.7 is in its unfolded mode. Ribs 168 connect to and extend between the bridging members. As seen in Figure 45, the ribs extend outwards relative to the bridging members 104.7 and 106.7. The bridging members are narrower in cross-section compared to the ribs 168 in this example.

[0054] Referring back to Figure 41, the backrest 102.7 includes a plurality of spaced- apart openings which extend substantially vertically, which are in this example in the form of a plurality of vertically-extending apertures 136.7 interposed between adjacent ribs 168. The backrest may thus be said to have a skeleton-like structure.

[0055] As seen in Figure 45, the backrest 102.7 has a plurality of u-shaped recesses at its exterior 118.7, as seen by recess 170. The recesses are adjacent to the bridging members 104.7 and 106.7 and are interposed between adjacent ribs 168. The recesses 170 facilitate folding of the backrest 102.7 and may function as vertically-extending bending regions to facilitate laterally folding the walker apparatus 40.7.

[0056] Referring now to Figure 44, housings 82.7 are generally L-shaped in profile in this example. Each housing has L-shaped sides 86.7 and 88.7. The housings have bottoms 92.7 that curve downwards in a concave-manner, in this example, as the housings extends outwards from upper ends 48.7 of the frame members 42.7 and 44.7.

[0057] Referring to Figures 42 to 44, adjustment mechanism 130.7 has female connectors in the form slots 172 each extending inwards from a respective distal end 86.7 of its housing 82.7. Each slot extends from top 90.7 to bottom 92.7 of its housing in this example. As seen in Figure 44, each slot 172 further includes a plurality of horizontally spaced-apart recesses, in this example in the form of four recesses, as seen by recess 174, positioned therewithin, and a plurality connector portions interposed between the recesses, as seen by connector portion 175. The recesses are wider than and extend radially outwards relative to the connector portions of the slots 172. Adjustment mechanism 130.7 further includes a plurality of vertically extending protrusions, in this example a pair of protrusions, as seen by protrusion 176. The protrusions are located adjacent to and extend outwards from respective ones of the distal ends 108.7 of the backrest 102.7. The protrusions are receivable within slots 172 and selective ones of the recesses 174.

[0058] Figure 46 shows a walker apparatus 40.8 according to a ninth aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 41 to 45 with decimal extension ".8" replacing decimal extension ".7" and being added for numerals of corresponding parts not previously having a decimal extensions. Walker apparatus 40.8 is generally similar to walker apparatus 40.7 shown in Figures 41 to 45, with backrest 102.8 being cantilevered to upper ends 48.8 of frame members 42.8 and 44.8, but with the apparatus having the following differences.

[0059] In this example a cushioning member 148.8 substantially extends around ribs 168.8 and bridging members 104.8 and 106.8 extend between the ribs. The cushioning member, or outer coat, may be made of neoprene or EVA foam (ethylene vinyl acetate) wrapped in polyester, according to some examples. However, here too these materials are not strictly required and other materials may be used in other embodiments. The cushioning member 148.8 comprises a plurality of vertical-extending portions coupled together and which extend between the bridging members 104.8 and 106.8, as seen by portion 151 of the cushioning member.

[0060] Bridging member 104.8 is upwardly curved as the backrest 102.8 extends towards central portion 134.8 of the backrest. Bridging member 106.8 downwardly curves as the backrest extends towards the central portion of the backrest.

[0061] Figure 47 shows a walker apparatus 40.9 according to a tenth aspect. Like parts have like numbers and functionings as the apparatus shown in Figure 47 with decimal extension ".9" replacing decimal extension ".8" and being added for numerals of corresponding parts not previously having a decimal extensions. Walker apparatus 40.9 is generally similar to walker apparatus 40.8 shown in Figure 46, with backrest 102.9 being cantilevered to upper ends 48.9 of frame members 42.7 and 44.7, but with the apparatus having the following differences. In this case, backrest 102.9 is substantially rectangular in section.

[0062] Also, the backrest includes a receptacle 178 extending across the back 179 of the backrest for storing objects. The receptacle is positioned on the exterior 118.9 of the backrest 102.9. The receptacle 178 in this example includes a zipper assembly 180 for selectively opening and closing the receptacle. The backrest 102.9 further includes an outer netting 182 having a closed bottom 184 and open top 186 for further facilitating storing of objects. The netting is also positioned on the exterior 118.9 of the backrest in this example.

[0063] Figures 48 and 49 show a backrest 102.10 of a walker apparatus 40.10 according to an eleventh aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 39 and 40 with decimal extension ".10" replacing decimal extension ".6" and being added for features not previously having decimal extensions. The backrest is shown laid out flat. The backrest 102.10 of the walker apparatus 40.10 is generally similar to the backrest 102.6 of walker apparatus 40.6 shown in Figures 39 and 40, with backrest 102.10 being cantilevered to the upper ends of the frame members 42, such as the upper ends 48.6 of frame members 42.6 and 44.6 seen in Figure 39, including at least one aperture 136.10 extending therethrough, with apparatus 40.10 having the following differences.

[0064] Aperture 136.10 of the backrest 102.10 aligns with the upper ends of the frame members, such as the upper ends 48.6 of frame members 42.6 and 44.6 seen in Figure 39, with the upper strap 104.10 being substantially positioned above the upper ends of the frame members and lower strap 106.10 being substantially positioned below the upper ends of the frame members in this example. Upper strap 104.10 includes a plurality of spaced-apart slits or grooves 188 partially extending therethrough which extend downwards from the top 112.10 of the backrest. The grooves extend substantially vertically in this example and are circumferentially spaced-apart when the backrest 102.10 is in its unfolded, arcuate-shaped mode.

[0065] The upper strap 104.10 comprises an upper half 190 of the backrest. Cushioning member 148.10 substantially extends along the upper half of the backrest adjacent to the interior 116.10 of the backrest. Aperture 136.10 of the backrest and lower strap 106.10 together comprise a lower half 192 of the backrest. Grooves 188 extend from top 112.10 and substantially through upper half 190 of the backrest towards the lower half 192 of the backrest in this example. Cushioning member 148.10 substantially extends along the grooves, leaving the grooves exposed adjacent to the top 112.10 of the backrest.

[0066] Backrest 102.10 is generally formed with flat surfaces made of polyolefins (polyethylene or polypropylene) with no reinforcement in this example, though these materials are not strictly required. The resulting backrest may bend evenly along its width. [0067] Figures 50 and 51 show a backrest 102.11 for a walker apparatus 40.11 according to a twelfth aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 48 and 49 with decimal extension ".11" replacing decimal extension ".10" and being added for features not previously having decimal extensions. The backrest 102.11 of walker apparatus 40.11 is generally similar to the backrest 102.11 of walker apparatus 40.10 shown in Figures 48 and 49 with the exception that cushioning member 148.11 extends over the tops of grooves 188.11 on the interior side 116.11 of the backrest 102.11 and extends over top 112.11 of the backrest.

[0068] Figures 52 to 54 show a walker apparatus 40.12 according to a thirteenth aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 1 to 21 with the addition of decimal extension ".12". Walker apparatus 40.12 is generally similar to walker apparatus 40 shown in Figures 1 to 21, with backrest 102.12 being cantilevered to the upper ends 48.12 of the frame members 42.12 and 44.12 and including at least one aperture 136.12 extending therethrough, but with the apparatus having the following differences.

[0069] Apparatus 40.12 includes a pair of u-shaped, resilient arms or connecting members, as seen by connecting member 194, that operatively connect the backrest 102.12 to upper ends 48.12 of the frame members 42.12 and 44.12, respectively, via housings 82.12 in this example. The connecting members may be made of acrylonitrile Butadiene Styrene (ABS) or hard polypropylene according to one example, though this is not strictly required and other materials may be used.

[0070] The connecting members 194 are adjustable in a horizontal direction as seen by arrow 191 in Figure 53. Elongate first portions 195 of the connecting members extend downwards in a generally s-like shape and elongate second portions 197 of the connecting members extend generally upwards. The second portions of the connecting members extend angularly from the first portions of the connecting members by an angle β that is acute in this example. The backrest 102.12 extends along and couples to the second portions 197 of the connecting members 194 in this example. Second portions 197 of the connecting members are at least partially flexible and are resiliently moveable relative to the first portions 195 of the connecting members, as seen by arrow of numeral 199 in Figure 53. [0071] The backrest 102.12 may be made of a more flexible material compared to the connecting members 194, enabling the connecting members to provide vertical support and strength and some resilience, while still ensuring that the backrest is readily foldable laterally. In this example the backrest 102.12 may be made of soft polypropylene or polyethylene, though this is not strictly required. The backrest includes a plurality of spaced-apart vertically-extending strips 196 and a plurality of spaced-apart horizontally- extending strips 198 intersecting with the vertically-extending strips in a grid-like pattern. A plurality of rows and columns of apertures 136.12 are formed thereby which are interposed between respective ones of the strips. The apertures are substantially rectangular in profile in this example. In this example, the backrest 102.12 is generally rectangular in front and rear profile.

[0072] As seen in Figure 52, top 112.12 of the backrest aligns with the upper ends 48.12 of the frame members 42.12 and 44.12 in this example. Referring to Figure 53, the vertically spanning distance dv of the backrest distance between the top 112.12 and bottom 114.12 of the backrest 102.12 is equal to or greater than the depth d _s of the seat assembly 62.12 in this example. As seen in Figure 54, backrest 102.12 so shaped is freely flexible and may fold in a wide-curl like shape when the walker apparatus 40.12 is folded laterally.

[0073] Figure 55 shows a walker apparatus 40.13 according to a fourteenth aspect. Like parts have like numbers and functionings as the apparatus shown in Figures 52 to 54 with decimal extension ".13" replacing decimal extension ".12" and being added for features not previously having decimal extensions. Walker apparatus 40.13 is generally similar to walker apparatus 40.12 shown in Figures 52 to 54, with backrest 102.13 being cantilevered to the upper ends 48.13 of frame members 42.13 and 44.13 and including at least one aperture 136.13 extending therethrough, but with the apparatus having the following differences. [0074] In this example, backrest 120.13 includes a plurality of spaced-apart, vertically-extending slits 136.13 with first ends 202 adjacent to the top 112.13 of the backrest and second ends 204 adjacent to the bottom 114.13 of the backrest.

[0075] Figures 56 to 58 show a walker apparatus 40.14 according to a fifteenth aspect. Like parts have like numbers and functionings as the apparatus shown in Figure 46 with decimal extension ".14" replacing decimal extension ".8" and being added for features not previously having decimal extensions. Walker apparatus 40.14 is generally similar to walker apparatus 40.8 shown in Figure 46, with backrest 102.14 being cantilevered to upper ends 48.14 of frame members 42.14 and 44.14 and including at least one opening or recessed portion 136.14 extending therethrough, but with the apparatus having the following differences.

[0076] In this example, backrest 102.14 comprises a pair of substantially rectangular portions 206 and 208 coupled together at lower portions, in this example lower halves 210 thereof. As best seen in Figure 58, a centrally positioned, vertically-extending rib 212 couples the rectangular portions of the backrest together in this example. The backrest 102.14 includes a pair of vertically-extending recessed portions 213 and 215 interposed between the rectangular portions 206 and 208 and rib 212, respectively. The backrest at these central locations are thinner compared to the rectangular portions and rib and may function to facilitate ready folding of the walker apparatus. Rib 212 may be also be thinner in cross-section than the rectangular portions 206 and 208 and may be made of polyurethane or double injection hard plastic for example, though this is not strictly required.

[0077] Referring to Figure 56, the backrest 102.14 includes an upper opening in the form of an upper recessed portion 136.14 centrally extending downwards from the top 112.14 of the backrest. The recessed portion separates two side-by-side portions 206 and 208 of the backrest. The recessed portion 136.14 of the backrest 102.14 extends from an upper half 214 of the backrest to the lower half 210 of the backrest and is generally u- shaped in this example. The backrest in this example further includes a centrally-disposed lower recessed portion 216, seen in Figure 56, extending upwards from the bottom 114.14 of the backrest 102.14 to rib 212. The lower recessed portion 216 is also u-shaped in this example and is smaller than the upper recessed portion 136.14 in this example.

ADDITIONAL DESCRIPTION

[0078] There is provided a walker apparatus having a backrest cantilevered to its upright frame members. The backrest has at least one opening extending therethrough for permitting a user's vision past the backrest when the user grips the upright frame members.

[0079] Examples of a walker apparatus and a backrest therefor have been described. The following clauses are offered as further description.

(1) A walker apparatus having a backrest cantilevered to its upright frame members, the backrest having at least one opening extending therethrough for permitting visibility past the backrest when a user grips the upright frame members.

(2) The apparatus of clause 1 further including a seat operatively connected to the upright frame members.

(3) The apparatus of at least one of the preceding clauses wherein the backrest is flexible and arcuate.

(4) The apparatus of at least one of the preceding clauses wherein the backrest is horizontally split.

(5) The apparatus of at least one of the preceding clauses wherein the backrest includes a pair of spaced-apart straps.

(6) The apparatus of at least one of the preceding clauses wherein the straps connect together at common ends.

(7) The apparatus of at least one of the preceding clauses wherein an upper one of the straps is U-shaped in cross-section. (8) The apparatus of at least one of the preceding clauses wherein an upper one of the straps is upwardly-convex in cross-section.

(9) The apparatus of at least one of the preceding clauses wherein the frame members have upper ends and wherein an upper one of the straps extends upwardly from the upper ends of the frame members.

(10) The apparatus of at least one of the preceding clauses wherein an upper one of the straps operatively extends in an upwardly curved manner from the frame members.

(11) The apparatus of at least one of the preceding clauses wherein the straps extend from the frame members in outwardly divergent directions relative to each other.

(12) The apparatus of at least one of the preceding clauses wherein an upper one of the straps extends from the frame members in an upward direction and wherein a lower one of the straps extends from the frame members in a downward direction.

(13) The apparatus of at least one of the preceding clauses wherein an upper one of the straps extends from the frame members in an upwardly-concave manner and wherein a lower one of the straps extends from the frame members in a downwardly-concave manner.

(14) The apparatus of at least one of the preceding clauses wherein the backrest has a central portion positioned between the frame members and wherein the straps are further spaced-apart as the straps move away from the frame members towards to the central portion of the backrest.

(15) The apparatus of at least one of the preceding clauses wherein the walker apparatus has a pair of sides and wherein the backrest has extending therethrough an oval-shaped aperture with tapered ends positioned adjacent to the sides of the walker apparatus, the aperture being positioned between the straps.

(16) The apparatus of at least one of the preceding clauses wherein the walker apparatus includes a folding mechanism operatively connected to and interposed between the frame members, the folding mechanism enabling the walker apparatus to be laterally-foldable along a folding axis, the straps being furthest spaced-apart relative to each other in a region aligning with the folding axis.

(17) The apparatus of at least one of the preceding clauses further including an adjustment mechanism that enables the extent to which the backrest extends from the frame members to be adjustable.

(18) The apparatus of at least one of the preceding clauses further including a handle brake assembly and wherein the adjustment mechanism comprises at least one female connector having a plurality of horizontally spaced-apart apertures extending therethrough and at least one male connector, the at least one male connector being receivable with respective ones of the apertures of the at least one female connector, the at least one female connector being a part of a first one of the handle brake assembly and distal ends of the backrest and the at least one male connector coupling to a second one of the handle brake assembly and distal ends of the backrest.

(19) The apparatus of at least one of the preceding clauses wherein the adjustment mechanism includes a pair of female connectors operatively connected to respective ones of the frame members, each female connector including a slot extending therein and each female connector including a plurality of horizontally-spaced recesses positioned within said slot, and wherein the adjustment mechanism includes vertically extending protrusions located adjacent to respective ones of the distal ends of the backrest, the protrusions being receivable within selective ones of said recesses of the female connectors.

(20) The apparatus of at least one of the preceding clauses further including a pair of slide rail assemblies, the backrest operatively connecting to and being extendable relative to the frame members via the slide rail assemblies.

(21) The apparatus of at least one of the preceding clauses wherein the straps extend along the front and sides of the walker apparatus.

(22) The apparatus of at least one of the preceding clauses wherein the straps extend along the front of the walker apparatus. (23) The apparatus of at least one of the preceding clauses wherein the straps are symmetrical about the vertical and horizontal axes of the backrest.

(24) The apparatus of at least one of the preceding clauses wherein the backrest is arcuate with an inner portion formed of polypropylene and an outer portion formed of thermoplastic polyurethane.

(25) The apparatus of at least one of the preceding clauses wherein the backrest is elliptical from the side as the backrest extends from the frame members.

(26) The apparatus of at least one of the preceding clauses wherein the backrest is y-shaped from the side as the backrest extends from the frame members.

(27) The apparatus of at least one of the preceding clauses wherein the backrest is u-shaped from the side as the backrest extends from the frame members.

(28) The apparatus of at least one of the preceding clauses wherein an upper one of the straps aligns with and tangentially extends from upper ends of the frame members and wherein a lower one of the straps extends in a spaced- apart and parallel manner relative to the upper one of the straps.

(29) The apparatus of at least one of the preceding clauses further including a pair of arc-shaped connecting members that connect the upper and lower ones of the straps together.

(30) The apparatus of at least one of the preceding clauses wherein the upper and lower ones of the straps connect to and extend tangentially from the arc- shaped connecting members.

(31) The apparatus of at least one of the preceding clauses further including a pair of s-shaped connecting members that connect the upper and lower ones of the straps together.

(32) The apparatus of at least one of the preceding clauses wherein an upper one of the straps aligns with and tangentially extends from upper ends of the frame members and wherein a lower one of the straps is spaced-apart below the upper ends of the frame members.

(33) The apparatus of at least one of the preceding clauses wherein the backrest includes a concave-shaped interior and a cushioning member positioned within said interior. (34)The apparatus of at least one of the preceding clauses wherein the cushioning member has an aperture extending therethrough.

(35) The apparatus of at least one of the preceding clauses wherein the cushioning member is loop-shaped.

(36) The apparatus of at least one of the preceding clauses wherein the backrest includes a cushioning member that substantially extends around the straps.

(37) The apparatus of at least one of the preceding clauses wherein the backrest includes a concave-shaped interior and a cushioning member positioned within said interior, the cushioning member connecting to and extending from one of the straps.

(38) The apparatus of at least one of the preceding clauses wherein an upper one of the straps is spaced-apart above upper ends of the frame members and wherein a lower one of the straps is spaced-apart below the upper ends of the frame members.

(39) The apparatus of at least one of the preceding clauses wherein each of the frame members is telescopic and includes a push button for selecting adjusting the height thereof.

(40) The apparatus of at least one of the preceding clauses wherein said at least one opening extends in a substantially horizontal direction.

(41) The apparatus of at least one of the preceding clauses wherein said at least one opening extends in a substantially vertical direction.

(42) The apparatus of at least one of the preceding clauses wherein the backrest has at least one aperture extending therethrough which extends in a substantially horizontal direction and at least one aperture extending therethrough which extends in a substantially vertical direction.

(43) The apparatus of at least one of the preceding clauses wherein the backrest comprises a plurality of spaced-apart, vertically-extending ribs with a plurality of vertically-extending apertures interposed between respective ones of the ribs.

(44) The apparatus of at least one of the preceding clauses wherein the backrest further includes a pair of substantially-horizontal upper and lower bridging members, the ribs connecting to and extending between the bridging members.

(45) The apparatus of at least one of the preceding clauses wherein the ribs radially extend outwards relative to the bridging members.

(46) The apparatus of at least one of the preceding clauses wherein the backrest has a convex-shaped exterior and a receptacle for storing objects, the receptacle connecting to the exterior of the backrest.

(47) The apparatus of at least one of the preceding clauses wherein an upper one of the straps includes a plurality of spaced-apart grooves partially extending therethrough.

(48) The apparatus of at least one of the preceding clauses wherein the opening is in the form of a substantially-horizontally extending aperture which aligns upper ends of the frame members, the upper one of the straps being positioned above the upper ends of the frame members and a lower one of the straps being positioned below the upper ends of the frame members.

(49) The apparatus of at least one of the preceding clauses wherein the upper one of the straps comprises an upper half of the backrest and wherein the aperture and the lower strap comprise a lower half of the backrest.

(50) The apparatus of at least one of the preceding clauses wherein an upper one of the straps includes a plurality of spaced-apart vertically-extending slits and wherein the backrest further includes a plurality of spaced-apart, vertically- extending ribs coupled to the upper one of the straps with the plurality of vertically-extending slits being interposed between respective ones of the ribs.

(51) The apparatus of at least one of the preceding clauses further including a pair of u-shaped, resilient connecting members that operatively connect the backrest to upper ends of the frame members, respectively.

(52) The apparatus of at least one of the preceding clauses wherein the backrest is substantially rectangular in profile.

(53) The apparatus of at least one of the preceding clauses wherein the backrest includes a plurality of spaced-apart vertically-extending strips and a plurality of spaced-apart horizontally-extending strips intersecting with the vertically- extending strips.

(54) The apparatus of at least one of the preceding clauses wherein the backrest includes a plurality of spaced-apart, vertically-extending slits.

(55) The apparatus of at least one of the preceding clauses wherein the backrest includes a top and wherein the at least one opening is a recessed portion centrally extending downwards from the top of the backrest.

(56) The apparatus of at least one of the preceding clauses wherein the recessed portion of the backrest extends from an upper half of the backrest to a lower half of the backrest.

(57) The apparatus of at least one of the preceding clauses wherein the backrest includes a top, an upper recessed portion extending downwards from the top of the backrest, a bottom spaced-apart from the top, and a lower recessed portion extending upwards from the bottom of the backrest.

(58) The apparatus of at least one of the preceding clauses wherein the backrest has a central portion located between the frame members, the recessed portions being positioned within said central portion of the backrest.

(59) The apparatus of at least one of the preceding clauses wherein the backrest comprises a pair of substantially rectangular portions coupled together at lower halves thereof.

(60) The apparatus of at least one of the preceding clauses wherein a centrally positioned, vertically-extending rib couples the rectangular portions of the backrest together.

(61) The apparatus of at least one of the preceding clauses wherein the backrest is shaped to form a substantially v-shape when the walker apparatus is folded laterally.

(62) The apparatus of at least one of the preceding clauses wherein the straps are substantially inwardly spaced-apart from support members when the apparatus is folded laterally.

(63) A walker apparatus comprising: a pair of spaced-apart, upright frame members; a seat operatively connected to the upright frame members; and a backrest cantilevered from the frame members, the backrest including a plurality of spaced-apart, vertically-extending ribs and a pair of substantially- horizontal upper and lower bridging members, the ribs connecting to and extending between the bridging members.

(64) The apparatus of at least one of the preceding clauses wherein the upper bridging member upwardly curves as the backrest extends towards its central portion.

(65) The apparatus of at least one of the preceding clauses wherein the lower bridging member downwardly curves as the backrest extends towards its central portion.

(66) A walker apparatus comprising a pair of spaced-apart, upright frame members, a pair of support members extending outwards from the frame members, a seat connected to and extending between the support members, and a pair of coupling members connecting the frame members and the support members together, each of the coupling members comprising an upright tubular portion which at least partially extends around part of a respective one of the frame members and a tubular portion which at least partially extends around part of a respective one of the support members.

(67) The apparatus of clause 66 wherein the coupling members are L-shaped.

(68) The apparatus of any one of clauses 66 and 67 wherein the tubular portions which connect to the support members are arcuate-shaped.

(69) The apparatus of any one of clauses 66 to 68 wherein the support members are arcuate-shaped.

(70) The apparatus of any one of clauses 66 to 69 wherein the coupling members have upper ends in the form of elongate rods to which the seat pivotally connects.

(71) The apparatus of any one of clauses 66 to 69 wherein the coupling members have upper ends in the form of receptacles to which the seat pivotally connects. [0080] It will be appreciated that many variations are possible within the scope of the invention described herein. It will be further understood by someone skilled in the art that many of the details provided above are by way of example only and are not intended to limit the scope of the invention which is to be determined with reference to at least the following claims.