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Title:
AN IMPROVED MEDICAL LEG SUPPORT ARRANGEMENT
Document Type and Number:
WIPO Patent Application WO/2022/000029
Kind Code:
A1
Abstract:
A medical leg support arrangement including at least one cross beam rotatably supporting a pair of ground-engaging wheels mounted by a spring to a central section of the arrangement with brake pads located above each each ground-engaging wheels. The spring includes a non braking position allowing rotation of the pair of ground-engaging wheels when the medical leg support arrangement is in use when a user is seated and a braking position whereby the pair of ground-engaging wheels remain in contact with the brake pads to prevent rotation of the pair of ground-engaging wheels when downward force is applied by the user when standing.

More Like This:
WO/2019/116060GYM TOOL
WO/2012/154481EXERCISE APPARATUS
Inventors:
LIPTAK MATTHEW (AU)
Application Number:
PCT/AU2021/050688
Publication Date:
January 06, 2022
Filing Date:
June 29, 2021
Export Citation:
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Assignee:
MAXM SKATE PTY LTD (AU)
International Classes:
A63B22/20; A61H1/02; A63C17/20
Foreign References:
EP2418006A12012-02-15
JP2001137421A2001-05-22
US1868548A1932-07-26
US5832560A1998-11-10
CN206965030U2018-02-06
US20070238587A12007-10-11
Attorney, Agent or Firm:
O'MAHONEY, John (AU)
Download PDF:
Claims:
CLAIMS:

1. A medical leg support arrangement adapted to increase a circular range of motion of a leg to aid in the healing and strengthening of damaged, injured and/or replaced bone, muscle and/or tissue of the leg, said medical leg support arrangement including; a main housing assembly; said main housing assembly including a front section having a curved and/or arched-up distal end; said main housing assembly further including a rear section having a curved and/or arched-up distal end; a plurality of ground-engaging wheels supported on opposing sides of each of the front section and the rear section, wherein the plurality of ground-engaging wheels are aligned substantially longitudinal along the main housing assembly including at or near the end of each of the respective curved and/or arched-up distal ends of the front section and the rear section of the main housing assembly so as to provide for a generally curved circumferential alignment of the plurality ground-engaging wheels on each of the opposing sides of the front section and the rear section; at least one cross beam mounted to a central section of the main housing assembly, wherein the or each cross beam rotatably supports a pair of ground- engaging wheels on both sides of the or each cross beam; the or each cross beam is mounted to the central section of the main housing assembly by a spring; brake pads located above each of the pair of ground-engaging wheels on both sides of the or each cross beam; said spring includes a first mounted support configuration to the cross beam, said first mounted support configuration of the spring to the cross beam characterised as a non braking position whereby the pair of ground-engaging wheels remain in a non-contact position with the brake pads so as to allow rotation of the pair of ground-engaging wheels when the medical leg support arrangement is in use when a user is seated; said spring includes a second mounted support configuration to the cross beam, said second mounted support configuration of the spring to the cross beam characterised as a braking position whereby the pair of ground-engaging wheels remain in contact with the brake pads to prevent rotation of the pair of ground-engaging wheels when downward force is applied by the user to the medical leg support arrangement when the user is standing.

2. The medical leg support arrangement of claim 1 wherein the spring when in the non braking position is undeflected in a linear orientation.

3. The medical leg support arrangement of claim 1 wherein the spring when in the braking position is deflected in a non linear orientation.

4. The medical leg support arrangement of claim 1 wherein the cross beam includes a vertical tab.

5. The medical leg support arrangement of claim 4 wherein the spring is mounted at a first end to the vertical tab of the cross beam.

6. The medical leg support arrangement of claim 5 wherein the spring is mounted at a second end to a pivot support, wherein the pivot support is mounted on the central section of the main housing assembly.

7. The medical leg support arrangement of claim 1 wherein the front section and the rear section of the medical leg support arrangement main housing assembly are separable and independent.

8. The medical leg support arrangement of claim 7 wherein the front section and said rear section are adjustably mountable and movable upon an joining strut of the medical leg support arrangement such that when the separable and independent front section and the rear section of the main housing assembly have been adjusted and fixed upon the joining strut, an upper surface of the front section and a corresponding upper surface of the rear section define a platform on which a foot of a user is restable and fastenable thereon.

9. The medical leg support arrangement of claim 7 wherein each of the front section and the rear section includes a cross beam mounted by a corresponding spring to the respective front section and rear section.

10. The medical leg support arrangement of claim 7 wherein the front section and the rear section of the main housing assembly are provided from a single mould.

11. The medical leg support arrangement of claim 1 wherein the pair of ground-engaging wheels rotatably supported on either side of the cross beam include along a peripheral edge a series of ridges and troughs and/or slots and extensions.

12. The medical leg support arrangement of claim 11 wherein the brake pads include a corresponding series of ridges and troughs and/or slots and extensions to mate with the ridges and troughs or slots and extensions of the ground-engaging wheels when the ground-engaging wheels remain in contact with the brake pads when downward force is applied to the medical leg support arrangement by a user when standing.

Description:
AN IMPROVED MEDICAL LEG SUPPORT ARRANGEMENT

FIELD OF THE INVENTION [001] This invention relates to an arrangement that is adapted to assist in the healing, recovery and/or strengthening of a leg and/or knee joint which has been subjected to damage, injury and/or replacement of bone, muscle and/or tissue.

[002] More particularly this arrangement is an improvement over the medical leg support arrangement previously provided by the applicant wherein use of the medical leg support arrangement in this further invention of the applicant to be presented herewith is an enhancement by providing a safety feature adapted to minimize hazards when using the arrangement.

BACKGROUND ART DISCUSSION [003] Previously the applicant provided a medical leg support arrangement that was disclosed and published under WO2014/066933 that could provide a unique recovery and/or rehabilitation device that will enhance a particular leg exercise that involves for the most part a back and forth bending motion of the lower leg that the user would perform whilst seated. [004] Advantageously, the arrangement provided for by the applicant previously under Patent No. WO2014/066933 included means and mechanisms wherein the back and forth motion of the user performed whilst seating can be achieved without bearing any weight on the damaged portion of the leg so that the patient or the person under rehabilitation is able to increase their range of motion in exercise building up to maximum movement of extension and flexion wherein importantly during ground engagement contact both at initial and departing points there is still no unnecessary burden or stress placed upon the damaged part of the leg.

[005] This continuous support on the damaged portion of the leg throughout movement from extension and flexion and vice versa was achieved, amongst other reasons, by the rotatable ground-engaging wheels located on opposing sides of the flat platform on which the user’s foot would rest thereupon, wherein these plurality of rotatable ground-engaging wheels would also be positioned as part of the curved distal ends so that there remained weight-bearing support upon initial contact and departure of the arrangement from the ground.

[006] Unlike, for example with a traditional roller skate, it was essential for the skate of this invention to have a structured curved section at the front of the toes and then a structured curved section at the back of the heel, wherein each curved section also includes ground-engaging wheels so as contact is made in landing of the foot to the ground and then departure thereof as the heel leaves the ground so continuous support is still maintained.

[007] Hence it was important to be able to maintain the free-flowing, unimpeded rolling motion of the ground-engaging wheels for the appropriate rehabilitation of the user if they are going to increase their range of motion in exercise building up to the maximum movement between extension and flexion and vice versa.

[008] However, with all this free-flowing, unbraked movement of the ground- engaging wheels, a problem might exist in the event that the user, without due care, stands up and to which the skate can have the potential to roll from under the user’s feet thereby presenting a risk of the user losing her or his footing and maybe falling over.

[009] While it would seem easy enough to solve the problem using conventional methods such as those installed as part of a traditional roller skate through the use of a toe brake wherein the user could simply lift the heel section and apply pressure to the toe stop to apply a brake, this braking mechanism of a conventional roller skate would interrupt that continuous rolling support make available by all the ground engaging wheels discussed above in the Applicant’s earlier invention which is imparted that required support when the skate is being used as intended.

[010] It would be particularly advantageous therefore to be able to introduce into the applicant’s existing medical leg support arrangement disclosed in WO20 14/066933, a braking mechanism that does not affect the continuous load-bearing support when the skate is used as intended made available by the free flowing plurality of ground-engaging wheels that are incorporated into the main body structure.

[011] Accordingly it is an object of this invention to provide a medical leg support arrangement with an improved safety feature adapted to minimise hazards associated with a user losing her or his foothold when standing when using the medical leg support arrangement.

[012] Further objects and advantages of the invention will become apparent from a complete reading of the following specification.

SUMMARY OF THE INVENTION

[013] In one form of the invention there is provided a medical leg support arrangement adapted to increase a circular range of motion of a leg to aid in the healing and strengthening of damaged, injured and/or replaced bone, muscle and/or tissue of the leg, said medical leg support arrangement including;

[014] a main housing assembly;

[015] said main housing assembly including a front section having a curved and/or arched-up distal end; [016] said main housing assembly further including a rear section having a curved and/or arched-up distal end;

[017] a plurality of ground-engaging wheels supported on opposing sides of each of the front section and rear section, wherein the plurality of ground- engaging wheels are aligned substantially longitudinal along the main housing assembly including at or near the end of each of the respective curved and/or arched-up distal ends of the front section and rear section of the main housing assembly so as to provide for a generally curved circumferential alignment of the plurality of rotatable ground-engaging wheels on each of the opposing sides of the front section and rear section;

[018] at least one cross beam mounted to a central section of the main housing assembly, wherein the or each cross beam rotatably supports a pair of ground-engaging wheels on both sides of the or each cross beam;

[019] the or each cross beam is mounted to the central section of the main housing assembly by a spring;

[020] brake pads located above each of the pair of ground-engaging wheels on both sides of the or each cross beam;

[021] said spring includes a first mounted support configuration to the cross beam, said first mounted support configuration of the spring to the cross beam characterised as a non braking position whereby the pair of ground-engaging wheels remain in a non-contact position with the brake pads so as to allow rotation of the pair of ground-engaging wheels when the medical leg support arrangement is in use when a user is seated;

[022] said spring includes a second mounted support configuration to the cross beam, said second mounted support configuration of the spring to the cross beam characterised as a braking position whereby the pair of ground-engaging wheels remain in contact with the brake pads to prevent rotation of the pair of ground-engaging wheels when downward force is applied by the user to the medical leg support arrangement when the user is standing.

[023] Advantageously this invention will be able to inherently impart a unique braking mechanism into the medical leg support arrangement without upsetting the way in which the medical leg support arrangement is intended to operate during the rehabilitation program of the user when seated where there is the requirement for the plurality of ground-engaging wheels to be free-flowing along the central section and the curved up distal front and rear ends to allow that back and forth motion of the user performed whilst seated to control the bearing of weight upon the damaged portion of the leg.

[024] However, should the user be required to stand, perhaps inadvertently wherein they have forgotten to remove the medical leg support arrangement from his or her foot, that downward force when standing of the user will cause the cross beam to move towards the ground but with the spring to be deflected and/or buckle from the resting configuration causes the engagement between the pair of ground-engaging wheels on either side of the beam with the corresponding brake pads thus preventing rotation of these wheels that have been mounted under the central section of the main housing assembly of the medical leg support arrangement with the end result preventing or at least significantly reducing the possibility of the medical leg support arrangement losing foothold so as to avoid any imparted imbalance to the user causing them to fall over or the like.

[025] In preference the spring when in the non braking position is undeflected in a linear orientation.

[026] In preference the spring when in the braking position is deflected in a non linear orientation.

[027] In preference the cross beam includes a vertical tab. [028] In preference the spring is mounted at a first end to the vertical tab of the cross beam.

[029] In preference the spring is mounted at a second end to a pivot support, wherein the pivot support is mounted on the central section of the main housing assembly.

[030] In preference the spring, when providing the first support to the cross beam wherein the pair of ground-engaging wheels remain in a non-contact position with the brake pads to allow rotation of the pair of ground-engaging wheels, is generally linear configured and undeflected and wherein said spring characterised in having the linear configuration vertically deflected along its length when providing the second support to the cross beam when the pair of ground-engaging wheels remain in contact with the brake pads preventing rotation of the pair of ground-engaging wheels.

[031] In preference the front section and the rear section of the medical leg support arrangement main housing assembly are separable and independent.

[032] In preference the front section and said rear section are adjustably mountable and movable upon an joining strut of the medical leg support arrangement such that when the separable and independent front section and the rear section of the main housing assembly have been adjusted and fixed upon the joining strut, an upper surface of the front section and a corresponding upper surface of the rear section define a platform on which a foot of a user is restable and fastenable thereon.

[033] In preference the medical leg support arrangement further includes a fastening arrangement to retain the foot of the user upon the defined platform.

[034] In preference each of the front section and the rear section includes a cross beam mounted by a corresponding spring to the respective front section and rear section. [035] In preference the front section and the rear section of the main housing assembly are provided from a single mould.

[036] In preference in an alternative embodiment of the invention, the pair of ground-engaging wheels rotatably supported on either side of the cross beam include along a peripheral edge a series of ridges and troughs and/or slots and extensions.

[037] In preference the brake pads include a corresponding series of ridges and troughs and/or slots and extensions to mate with the ridges and troughs or slots and extensions of the ground-engaging wheels when the ground-engaging wheels remain in contact with the brake pads when downward force is applied to the medical leg support arrangement by a user when standing.

[038] In order now to describe the invention in greater detail a series of preferred embodiments will be described with the assistance of the following illustrations and accompany text.

BRIEF DESCRIPTION OF THE DRAWINGS

[039] Figure 1 is a perspective view of the medical leg support arrangement in a preferred embodiment of the invention.

[040] Figure 2 is a perspective view similar to that of Figure 1 with certain components removed so as to be able to view in greater detail important structural features of the braking mechanism of the medical leg support arrangement of the preferred embodiment of the invention.

[041] Figures 3a to 3d show a series representations of the mounting of a cross beam that rotatably supports a pair of ground-engaging wheels with a corresponding spring, wherein Figure 3a is a perspective view of the spring in an undeflected, non-contact position with brake pads, Figure 3b is a perspective view with the spring in a deflected contact position with the brake pads (not shown) and wherein Figures 3c and 3d are section views of Figures 3a and 3b. [042] Figures 4a and 4b are section views of the medical leg support arrangement in a preferred embodiment of the invention wherein Figure 4a is the section view showing the non-contact (non-braking) of the pair of ground- engaging wheels with the brake pads and wherein Figure 4b shows the contact between the ground-engaging wheels and the brake pads (brake position).

[043] Figures 5a and 5b show section views of a further preferred embodiment of the contact arrangement between the pair of ground-engaging wheels supported by the cross beam with the brake pads of the medical leg support arrangement. DETAILED DESCRIPTION OF THE INVENTION

[044] Referring to the drawings now in greater detail, wherein Figure 1 shows the general arrangement of the medical leg support arrangement as (10).

[045] The main housing assembly of the medical leg support arrangement (10) includes a front section (12) and an independent separate rear section (14) wherein the independent front section (12) and rear section (14) are slidably adjustably mountable one with respect to the other upon the joining strut (15).

[046] The front section (12) includes an upper surface (17) and the rear section (14) includes an upper surface (16) to which the upper surfaces (17) and (16) define a platform type structure wherein a foot of a user (not shown) could rest thereupon the defined platform provided by the upper surface (17) of the front section (12) and the upper surface (16) of the rear section (14) in combination with the joining strut (15).

[047] A foot (not shown) resting upon the upper surfaces (17) and (16) would be held upon the medical leg support arrangement (10) through fasteners (18a) and (18b).

[048] The front section (12) includes a curved up or arched up distal end (20) on which a plurality of ground-engaging wheels (21) are rotatably supported. [049] The front section (12) also includes a pair of ground-engaging wheels (23) which as will be discussed in greater detail when referencing Figures 3a through to 3d, are rotatably supported by a cross beam.

[050] The rear section (14) also includes a curved up or arched up distal end (25) supporting the plurality of ground-engaging wheels (21) as well as a ground-engaging wheels rotatably supported by the cross beam (26).

[051] Continuous support on the damaged portion of a leg of a user throughout maximum movement from extension and flexion and vice versa, is achieved by the way in which the rotatable ground-engaging wheels (21) on the respective curved distal ends (20) and (25) of the front section (12) and the rear section (14) along with those ground-engaging wheels (23) rotatably supported on the cross beams (26) located in the central section of the main housing assembly of the medical leg support arrangement (10) shown generally as (13) in Figure 1.

[052] Hence the central section includes end parts of the front section (12) and rear section (14) that are then linked together by way of the joining strut (15).

[053] The inclusion of the plurality of ground-engaging wheels (21 ) at the curved distal ends (20) and (25) means that there is weight bearing support and maintaining thereof upon initial contact and departure of the medical leg support arrangement (10) with the ground, importantly maintaining that continuous support to the leg of the user during the back and forth circumferential motion.

[054] To begin to understand the significance of this invention a greater appreciation of the braking arrangement can be understood when viewing the remaining figures, Figure 2 through to Figure 5b.

[055] The pair of ground-engaging wheels (23) supported on each of the cross beams (26), as best seen in figures 3a and 3b, are mounted to the main housing assembly of the medical leg support arrangement (10) by way of the spring (30) for each of the front section 12 and rear section 14. [056] The cross beams (26) supporting the pairs of ground-engaging wheels (23) includes a vertical tab or bracket (34) to which one end of the spring (30) is mounted thereto. The other end of the spring (30) is mounted to the block (35) through a pivot support (37) as best seen in Figures 3c and 3d. The block (35) is then mounted to the body chassis of the main housing assembly of the medical leg support arrangement (10) and notably to each of the front section (12) and the rear section (14) so that the respective cross beams (26) are positioned in the central section (13) of the medical leg support arrangement (10). [057] The front section (12) and the rear section (14) can be made from a single mould and then orientated and connected as required in a mirrored arrangement through the adjustability with the joining strut (15) when required to be assembled.

[058] Hence although the braking mechanism is imparted to both the front section (12) and the rear section (14) of the medical leg support arrangement (10) there is no requirement to have two different kinds of moulds with alternative oriented structures to accommodate the required cross beams (26) as well as the other connecting componentry including the mounting block (35), and pivot support (37). [059] In the preferred embodiment shown, the cross beam (26) will be non rotating and as best seen in Figures 4a and 4b the pair of ground-engaging wheels (23) rotatably supported on the cross beam rotatably turn about the fixed cross beam (26) at the respective distal ends (39) of the cross beams (26).

[060] In the preferred embodiment the cross beam (26) is shown as two separate parts (41a) and (41b) as best seen in Figures 4a and 4b.

[061] With the assistance of Figures 3a through to 3d and Figures 4a and 4b, when looking at the non-braking position where the ground-engaging wheels (23) are in a non-contact position with the brake pads (42) as specifically shown in Figures 3a, 3c and 4a, the spring (30) remains generally in a linear configuration with inherent tension in the windings of the springs to support the cross beam (26) with the ground-engaging wheels (23) so that the user whilst seated performing the required rehabilitation with the medical leg support arrangement (10) will have the ground-engaging wheels (23) along with all the remaining ground engaging wheels (21) at the respective distal ends (20) and (25) of the front section(12) and rear section (14) freely rotatable for appropriate rotation to impart that required support for a user’s damaged leg during the exercises for building up the movement and balance as the leg moves from extension to flexion and vice versa.

[062] However when a user stands up and so as to avoid the risk of the medical leg support arrangement (10) rolling out from under the foot of the user thereby exposing a risk of imbalance and potential falling over and the like to the user, the braking mechanism of the medical leg support arrangement (10) becomes operational because that downward force of the user front section (12) and rear section (14) to be pushed down which causes the spring (30) as best seen in Figures 3b, 3d and 4b to deflect as the front section (12) and the rear section (14) of the main housing assembly of the medical leg support arrangement (10) pushes towards the ground.

[063] This then deflects the spring (30) again as shown in Figures 3b, 3d and 4b causing the cross beam (26) to move upwards and so too then raise the pair of ground-engaging wheels (23) to make contact with the brake pads (42) wherein that contact between the ground-engaging wheels (23) and the brake pads (42) prevents rotation of the ground-engaging wheels (23) to thus prevent a user to lose foothold and fall over when in a standing position with the medical leg support arrangement (10) still fastened to their foot, because the ground- engaging wheels (23) are prevented from rotating as the ground-engaging wheels (23) are locked in place by the brake pads (42).

[064] As best seen in Figures 3c and 3d, the inclusion of an additional pivot support (37) with the spring (30) engagement with the block (35) provides an improved mounting of the spring (30) to the front section (12) and rear section (14) of the main housing assembly of the medical leg support arrangement (10) assisting the way in which the spring at one end can be vertically deflected.

[065] Figures 5a and 5b show an alternative embodiment of the invention, wherein the pair of ground-engaging wheels (60) rotatably supported on either side of a cross beam (not shown) include along a peripheral edge a series of ridges and troughs and/or slots and extensions (62) and wherein the brake pads (63) include a corresponding series of troughs and ridges and/or slots and extensions (64) to mate with the troughs and ridges or slots and extensions (62) of the ground-engaging wheels (60) when the ground-engaging wheels (60) remain in contact with the brake pads (63) when downward force is applied to the medical leg support arrangement by a user when standing.