BACKGROUND OF THE JNVENTSQN

1. Field of the Invention

The present invention relates to devices and methods for shielding the eyes, and in particular, to eye shields designed to attach to a safety helmet.

2. Description of Related Art Construction workers and emergency personnel often wear safety helmets under varying conditions and for extended periods of time. The users of these helmets may also wear safety glasses for avoiding eye injury, or ordinary sunglasses to deaf with bright light and glare. When doing close-up work or when working in a relatively dark environment, safety helmet users will often temporarily remove their glasses. The temporarily removed glasses are then often lost or damaged. In some cases a user may wish to glance at a bright scene or a dark scene and therefore may wish to briefly don or remove sunglasses, but this process is inconvenient and for efficiency's sake may be performed by temporarily lifting or removing the safety helmet. Obviously, helmet removal ss to be avoided for safety reasons.

The safety helmets known as hardhats typically have right and left slots along the Sower rim of the helmet for holding accessories such as ear muffs. See for example U.S. Patent 4,639,950, Sn Figures 6 and 7 of U.S. Patent 5,012,528 a visor 98 is attached through pivot 92 to arm 88, which connects through pivot 92 to a connecting member 86 that is attached to side slots on a hard hat from above. When not needed, visor 96 swings upwardly to a position above the brim of the hard hat. See also U.S. Patent 4,479,738.

In U.S. Patent 5,986,738 a safety visor is attached to an arm 21 that is pivotally connected to blocks 22 that are designed to snap into the side slots on a hard hat from above. The visor is positioned in front of the brim when in use. When no longer needed, the visor swings into a position above the brim. See also U.S. Patent 4,442,551.

in U.S. Patent 6,892,393 a pair of hubs each have tongs that snap into rim sfots on the sides of a conventional safety helmet. A pair of telescopic temples project from these hubs so that their longitudinal and angular orientation can be adjusted. A Sens is rotatabiy attached to the ends of the temples in order to flip up from a lower position to a raised position. The pivoting is arranged to allow the Sens to flip up and still remain subjacent to the brim of the helmet. Thus, the eye shield attachment can be conveniently placed on a safety helmet and adjusted so that the Sens is located at a position that is in front of the user's eyes and spaced far enough away for comfort.

See also U.S. Patent 5,533,207 (eye shade is bolted or screwed to bits of a hard hat); U.S. Patent 5,928,854 (face shield hinged to a bracket that is attached to the side of a protective helmet); U.S. Patent 6,490,729 (goggles straps can be pushed onto quick fasteners that attach to the edge of a safety heSmet); and 6,959,989 (top center edge of safety glasses clip into connector on front of helmet): as weSS as U.S. Patent Application Publication No. U.S. 2002/ 0069489 (pair of wings clip into the side slots of a hard hat to provide a nook for keeping sunglasses handy).

Designing an accessory that can attach to a safety helmet is complicated by the fact that rim sfots vary from heSmet to helmet. While one may make a clip that is smaiS enough to fit into the smalSest rim slot, this clip will be loose in larger rim slots. Also, a known clip has a trio of tongs, the center one having a step or shoulder that deflects as it passes through the rim slot before snapping over the upper edge of the slot. While one may make this tong long enough to accommodate the largest rim slot, again excessive piay will occur for smaller slots. Moreover, looseness or play may result in the accessory accidentally disconnecting from the rim slots. In fact, accidental disconnection from a rim slot is a significant concern even when a clip is designed for the dimensions of a specific rim slot.

See U.S. Patent 6,491 ,390 (a frame clipped to the bill of a cap pivotaliy supports a Sens); U.S. Patent 6,134,719 (helmet windshield attached to the helmet by pivots 11 ); U.S. Patent 5,890,233 (aitβrnative visors pivotaily connected to the Side of a Sight sports helmet); U.S. Patents 4,856,109; and U.S. Patents 6,185,739. See also, U.S. Patents 264,574; 857,838; 4,322,138; 5,012,528; 5,940,891; 6,618,907: and 7,229,172, as well as U.S. Patent Application Publication Nos. 2006/0158609 and 2006/0236438.

SUMMARY OF THE [NVENTSON

In accordance with the illustrative embodiments demonstrating features and advantages of the present invention, there is provided an eye shield attachment for use in combination with a safety helmet. The helmet has a front brim continuous with a rim extending along each opposite side of the safety helmet to a pair of rim slots in the rim of the safety helmet. The eye shield attachment includes a pair of frames adapted to removably attach to the pair of rim slots in the heimet. The frames each have a fastening member that is Sockabie onto a corresponding one of the rim slots and adjustable to accommodate various depths in the rim slots. Also included is a support structure that is attached to the pair of frames and adapted to extend along the rim toward the front brim. The eye shield attachment also has a lens attached to the support structure.

Sn accordance with another aspect of the invention, there is provided an eye shield attachment for use in combination with the foregoing safety helmet. The eye shield attachment includes a support structure adapted to removably attach to the pair of rim slots in the helmet and extend along the rim toward the front brim. Also includes is a lens attached to the support structure. The eye shield attachment also includes corrective glasses attached to the support structure behind the lens,

In accordance with yet another aspect of the invention, there is provided an eye shield attachment for use in combination with the foregoing safety heimet. The eye shield attachment includes a support structure adapted to removably attach to the pair of rim slots in the helmet and extend along the rim toward the front brim. The support structure has a front section. Also included is a lens attached to the support structure. The attachment aiso iπciudes a pliabie bead attached to the front section and extending rearwardiy to engage a wearer's forehead,

Sn accordance with stil! yet another aspect of the invention, a method is provided for attaching an eye shield to the foregoing safety helmet. The method includes the step of attaching to the pair of rim slots a support structure that extends along the rim to the front brim using a pair of fastening members. The support structure is used to support the eye shield. Another step is adjusting the fastening members to accommodate various depths in the rim sSots and locking the fastening members in place.

By employing apparatus and methods of the foregoing type an improved accessory is achieved that can be readily attached to the rim slots of a safety helmet, Sn a disclosed embodiment a right and left frame each has a pair of tongs. Each tong has an arm cantilevered at an acute angle outwardly from the distal tip of an upright post. Accordingly, the arms of the tongs can compress as they are inserted into a rim slot, thereby making for a snug fit and reducing play. In this embodiment a slotted strap projects from the frame between the tongs and through the rim slot. This slotted strap folds back over the outside of the rim siot so that one of the strap slots may be attached to an external lug on the frame. Accordingly, the strap ties the frame to the rim slot to prevent accidental disconnection from the safety helmet,

In this disclosed embodiment a structure that supports a flip up lens has a pair of temple sections that slide through the channels on a pair of rotors that are rotatably mounted in the two frames. The rotors can be turned to change the angle of elevation of the temples and thus the height of the tens, Aiso, the temple sections can be slid through the channels in the rotors to change the spacing of the lens from the face. Detents are provided so that the temples can maintain a desired extension and angle of elevation. Also in this disclosed embodiment, the rear tips of the temples have a keyhole-shaped notch for gripping a cord or lanyard that holds another accessory such as ear protectors. BREF DESCRIPTION OF THE DRAWINGS

The above brief description as well as other objects, features and advantages of the present invention will be more fully appreciated by reference to the following detailed description of presently preferred but nonetheless illustrative embodiments in accordance with the present invention when taken in conjunction with the accompanying drawings, wherein:

Figure 1 is a perspective view of a safety helmet with an eye shieid attachment in accordance with principles of the present invention;

Figure 2 is an exploded, perspective view of one of the side frames of the attachment of Figure 2;

Figure 3 is a cross-sectional view taken through a piane containing the axis of the rotor of Figure 2 and parallel to its walls;

Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3;

Figure 5 is a detailed view of the distal end of the side temple section of Figure 1 ,

Figure 6 is a cross-sectional view taken along line 6-6 of Figure 5;

Figure 7 is a front elevational view of the support structure of Figure 1 with a right portion broken away for illustrative purposes;

Figure 7A is a cross-sectional view of the support structure of Figure 7 taken along Sine 7A-7A and showing a pliable bead and corrective glasses about to be installed thereon;

Figure 7B is a cross-sectional view of the support structure of Figure 7 taken along line 7B-7B and showing a pliable bead about to be installed thereon;

Figure 7C is a cross-section a i view of the support structure of Figure 7 taken along Sine 7C-7C and showing a piiabie bead about to be installed thereon;

Figure 8 is an exploded, top plan view of the support structure of Figure 1 with a right portion broken away for illustrative purposes;

Figure 8A is a cross-sectional view of the support structure of Figure 8 taken along Sine 8A-8A;

Figure 8B is a cross-sectional view of the support structure of Figure 8 taken along line 8B-8B;

Figure 9 is a bottom view of the pivoting lens holder of Figure 8;

Figure 10 is a front view of the lens of Figure 1 ;

Figure 11 is a front view of corrective glasses that can snap onto the support structure as shown in phantom in Figure 7; and

Figure 12 is a perspective view of the safety helmet of Figure 1 showing the eye shield attachment fastened with a fastening member and the lens raised.

DETAfLED PESCRSPTiON OF THE PREFERRED EMBODIMENTS

Referπng to Figure 1 , a safety helmet 10 is shown as a hard hat, although other safety helmets may be employed having different shapes, including the shape associated with the helmets worn by firefighters. The front brim 12 of helmet 10 is shown as a somewhat elongated biil, although embodiments are contemplated where the front brim of the helmet will simply be an edge without any substantial forward projection. Therefore, as used herein, the term brim does not necessarily imply an outwardly projecting element.

The rim 14 of helmet 10 extends continuously from front brim 12. The helmet 10 has on its right and left side along rim 14 a conventional rim slot 16 in the form of a four-sided rectangular passage open at its upper and lower ends.

An eye shield attachment is shown mounted in rim slot 16. fn particular, a Sens 18 is shown mounted distaiiy, that is, on the distal end of support structure 20. As explained further hereinafter lens 18 (also referred to as an eye shield) is pivoted and is shown in this Figure in its lowered position. In this embodiment support structure 20 has an arched front section 2OA that is integral with right and left sections 2OB. Arch 2OA connects to side sections 2OB through a V-shaped transition or valley 2OC. It will be appreciated that in some embodiments structure 20 may being composed of discrete elements that are attached together.

Each side section 2OB is pivotaliy and slidably attached to a frame 22. A rack of ridges or teeth 40 are located along groove 38 of section 2OB. It will be appreciated that an identical frame is attached to the other rim slot on the opposite side of helmet 10.

A pair of tongs 24A and 24B upwardly project from frame 22 and are shown reaching out of the top of rim slot 16. Frame 22 and the tongs 24A and 24B will be a single, integrally molded plastic item, although other embodiments may employ multiple components made of various materials.

A relatively long fastening member 26 is attached to frame 22 and upwardly projects between tongs 24A and 24B and through rim slot 16. Although the bulk frame 22 is shown located below rim slots 16 in other embodiments the frame may be located mostly above and, in general, the direction of fastening member 26 is referred to as the extension direction. Member 26 is shown as a flexible plastic band with a narrow proximal section leading to a wider section with five evenly spaced slots 27. Slots 27 are designed to snap over the head of iug 23 which has a T-shaped cross-section (i.e., a mush room- 1 ike shape). β

Referring to Figure 2, previously mentioned frame 22 has a panel 22A surrounded by a straight wail 22C and an arched wail 228, the latter wall having an opposing pair of side openings 22D. Outwardly extending in opposite directions from the two ends of wail 228 are a pair of cup-shaped ears 25 that are open on the inside.

Previously mentioned tong 24A has a tapered upright post 24A-1 that extends from wail 22C and integrally connects at its dista! end to non-tapered, cantilever 24A-2, which extends outwardly at an acute angie of about 10° from post 24A- 1 to provide an outside edge that is distaliy converging. The inside crook between elements 24A-1 and 24A-2 has a cylindrical reiief. Tong 24B and its elements 24B-1 and 24B-2 are on the opposite end of wall 22C and constitute the mirror image of tong 24A. The outside edges of cantilevers 24A-2 and 24B-2 tend to center frame 22 without locking onto a rim slot (rim slot 16 of Figure 1). Accordingly, at least 90% of the length of outside edges of cantilevers 24A-2 and 24B-2 penetrate at least penetrate the rim slot. Thus, the free ends of cantilevers 24A-2 and 24B-2 do not penetrate the rim slot and snap outwardly to Sock in place.

Shelf 32 connects between opposing sides of wail 22B, and is spaced slightly from the inside of panel 22A to allow deflection relative thereto. ESevationa! detent 34 projects inwardly from the center of shelf 32 and is in the form of a triangular prism. A cylindrical collar 36 projects from the inside face of panel 22A. Previously mentioned fastening member 26 is shown with a tang 26A that is tapered like an arrowhead in order to snap into a mating slot in wall 22C.

Referring to Figures 2-4 _s rotor 42 is shown as a wheel-like structure with a concentric hole 44 and two sets of peripheral teeth 46 in two diametrically opposed 45° sectors. Projecting axially to straddle hole 44 and form a channel are parallel waSis 48, whose outer edges have inwardly turned, opposing lips 48A.

A pair of paraiie! grooves 50 run along the inside edges of walls 48, leaving a ridge 52 that is diametrically aligned with hole 44. Diametrically aligned on the opposite side of hole 44 is another ridge formed into a cantiievered detent 54 by virtue of the undercut 56. Detent 54 (also referred to as a proximity detent) can flex to allow its axiaity projecting, distai tooth 54A to move in and out.

Referring to Figures 2, 5 and 6, groove 38 of previously mentioned side section 2OB extends to distal tip 2OD and contains a plurality of teeth 40. The distal end of groove 38 has a keyhole-shaped opening 58, sized to hold a cord or lanyard that connects to an accessory such as a hearing protection device.

Rotor 42 is rotatably mounted against panel 22A on frame 22 with collar 36 inserted through rotor hole 44. Then section 2OB can be inserted through one of the openings 22D and into the channel between walls 48 of rotor 42.

Figure 2 indicates rotor 42 mounted on collar 36 with the proximity detent 54 to the left, in this view. Figure 2 also suggests section 20B being inserted from the right. This arrangement would be appropriate for attachment to a right temple section. For attachment to a left temple section, rotor 42 may be rotated 180° and the temple section 2OB inserted through the other opening 22D that is shown on the left in Figure 2. in either event, detent 34 will fali among the teeth 46 on one side or the other of rotor 42, Therefore, the rotor will tend to stay in a given angular position unless enough torque is applied to deflect shelf 32, drive detent 34 outwardly, and allow the detent to skip between teeth 46.

Temple section 2OB has on its edge a stop 60 in the form of a transverse nub located over a hollow 62, which can collapse under pressure in order to allow retraction of stop 60. This retraction of stop 60 allows tempϊe section 2OB to slide into and out of the channel between walls 48 of rotor 42. When stop 60 has entered and passed through the channel formed by walls 48, the stop can be released to prevent accidental removal of the temple from the channel. Groove 38 of temple section 2OB can then slide over ridge 52, provided enough longitudinal force is applied to depress detent tooth 54A ₃ allowing it to ratchet over teeth 40 of temple section 2OB. Refernng to Figures 7-9, front section 2OA has near its center a pair of ventral fins 20E leading to a pair of notches 66 each spanned by a cylindrical shaft 68. A downwardly directed, notched tongue 70 (also referred to as a Sand region) located at the center of section 2OA has an upper aperture 72 exposing a shaft 74. Corrective glasses 76 (shown in phantom) can dip onto shaft 74 in a manner to be described presently.

A pliable bead 80 made of a soft eiastomeric materia! is glued to the back face of front section 2OA and is approximately coterminous with the distal ends of ventral fins 2OE. Bead 80 is absent from Figure 7 to simplify the illustration. Bead 80 has a plug 80A that is press fitted into socket 78 (Figures 7 and 7A) located just above previously mentioned aperture 72. Afrontwardiy projecting rectangular boss 82 located above socket 78 (and slightly overlapping the socket) is straddled on the right and left with a pair of notches.

Referring to Figures 8-9, a crescent-shaped Sens holder 84 has a central, tapered projection 88 located between a pair of C-shaped, rear clips 86 that open downwardly. Clips 86 can snap onto and rotate upon previously mentioned shafts 68. As the back of projection 88 rotates between the front and the top face of boss 82, the projection 88 can ciimb over the upper front corner of boss 82, thereby passing between two detent positions; namely, a raised and a lowered position for holder 84.

As shown in Figure 9 holder 84 has a front wall 90 running approximately the entire length of the holder essentially at right angles to overhang 84A. A relatively short inside wail 92 faces front wall 92 to form a lens-holding channel 94 bordered on opposite ends by undercut stubs 96, which are integral with wall 90 and overhang 84 A.

Referring to Figure 10, lens 18 has bowed, right and left sections 18A that together curve through about 160°. Sections 18A are joined by a relatively flat, integral bridge 18B with an upper pair of undercut corners 188-1. A relatively soft nosepiece 98 is placed between the sections 18A and under bridge 18B, Referring to Figures 11 and 7A, corrective glasses 76 have a pair of nπgs 76A encompassing a pair of prescription lenses 76B. Rings 76A are joined by X- shaped bridge 76C, which is integrally connected to a C-shaped clip 76D.

To facilitate an understanding of the principles associated with the foregoing apparatus, its operation will be briefly described. A user may select any one of the conventional safety helmets having rim slots similar to slot 16 of Figure 1. The foregoing eye shield attachment may be installed by grasping one of the frames 22 and inserting the tongs 24A and 24B, and fastening strap 26 from below into the rim slot 16. A frame on the other side will be likewise installed.

The tongs 24A and 24B will guide and center the assembly. In particular, arms 24A-2 and 24B-2 will deflect inwardly to accommodate the clearance inside rim slot 16. Moreover, this feature will allow tongs 24A and 24B remove the play for different sizes of rim slots.

When fully inserted, shoulder 25 will press against the underside of rim slot 16. At this time, fastening strap 26 can be folded down to the position shown in Figure 7 and an appropriate one of the slots 27 can be snapped over the lug 23. This arrangement wii! accommodate rim slots of different depths. Thus, for relatively deep (shallow) rim slots a distai (proximal) one of the slots will be chosen. Moreover, fastening strap 26 will positively lock frame 22 in plaσe, preventing accidental disconnection thereof.

Lanyard or cord 64 is shown attached to previously mentioned notch 58.

Cord 64 may terminate in a knot that keeps the court in the notch. Alternatively, cord 84 can have a loop that passes through the notch 58.

As previously described, temple section 2OB is mounted inside rotor 42 (Figure 2) and is allowed to slide longitudinally and to rotate and thereby change the angle of elevation. When temple section 20B slides longitudinally tens 18 can be brought closer or further from the wearer's face. When temple section 2OB is rotated the lens can be moved higher or lower relative to heimet 10 and the wearer's face. For the reasons previously described, temple section 2OB will tend to keep this angular and longitudinal orientation uniess sufficient force is applied to overcome the previously mentioned detents, namely, detents 64 and 34 of Figure 2. Also, groove 38 terminates at distal end 38A (Figure 7). Accordingly, end 38A acts as a stop that restricts inward (dorsal) movement of lens 18 to limit facial impact with the Sens,

Accordingly, the user may position lens 18 to avoid pressure on the face or nose and thereby increase the wearing comfort. Also, support structure 20 can be adjusted so projection 8OB on bead 80 lightly presses against the wearer's forehead so that sweat is diverted away from the eyes.

In addition, the user may elevationaSly adjust lens 18 by adjusting the angle of elevation of temples 20. This adjustment allows the user to vertically center lens 18 relative to the user's eyes, as well as provide an appropriate clearance from the underside of front brim 12.

The temple section 2OB can be extended to provide clearance for eyeglasses that the user may be wearing. However, instead of using conventional eyeglasses, the wearer can use the corrective glasses 76 as shown in Figure 11. These glasses can be fitted with prescription Senses 76B tailored to the wearer's vision, in that case, the branches of clip 76D can be snapped around bar 74 (Figure 7). Accordingly, the corrective glasses 76 will remain in position whether or not shielding Senses 18 are raised or lowered.

When the user is wearing the helmet 10 fens 18 will typically be positioned as shown in Figure 1 providing protection for the user's eyes and, if desired, shading. If there is some need to get the lens 18 away from the user's eyes, the Sens 18 can be quickly flipped up to the raised position. This process can be performed without removing helmet 10.

When flip-up lens 18 is raised, tapered projection 88 (Figure 8) slides from the front face of boss 82 (Figure 7), traversing the upper front corner of the boss and eventually reaching the upper face of the boss. When the Sans 18 is towered projection 88 traverses boss 82 in the opposite direction. This traversal across the upper front corner of boss 82 effectively detains Sens holder 84 and thus lens 18 in either a raised or a lowered position.

Lens 18 may be replaced either when worn or when the wearer wants to change the lens to provide a different type of shaded or tinted iens. Because corners 18B-1 (Figure 10) as weli as Socking studs 96 (Figure 9) have complementary undercuts, bridge 18B can snap out of channel 94 away from studs 98. A replacement iens 18 can be attached by aligning its bridge 18B with channel 94 and pressing inwardly until the undercut corners 18B-1 snap into position past the undercut studs 96.

It is appreciated that various modifications may be implemented with respect to the above described, preferred embodiments, Instead of releasably attaching one of the siots of the flexible strap to a lug, an attachment can be made by a ball and socket joint, a hasp, a magnetic latch, a hook and staple joint, hook and loop fasteners, etc. Furthermore, instead of a V-shaped tong, some embodiment may have a spring biased bar, a flexible bowed leg, an adjustable set screw, etc. Also, the outline, shape, and curvature of the lens can be adjusted to accommodate various helmets, users' head sizes, persona! preferences, fashion considerations, etc. Sn some cases, the iens will be given a curvature to act as prescription lenses that correct the user's sight deficiencies. Furthermore, the pivot point of the iens can be repositioned to alter the height reached by the lens when swung into the raised position, Moreover, some embodiments may have a brace spanning the dista! ends of the side frames and the lens may be pivotaily mounted on that brace. Sn some embodiments a ball will be formed at the distal end of the side frames that will snap into sockets on the Sens or vsce versa, In still other embodiments, the ball joint may be replaced with a simple hinge, including a live hinge, instead of sliding adjustment of the temple through a frame, some fempSes can be telescopicalSy adjustable to adjust the horizontal spacing. In addition the rotor supporting the temple can have any one of a variety of shapes and its temple-supporting channel can be a tunnel. Instead of being sϋdabSy mounted in a channel, the temple can have a C~shapβd cross-section that slidably fits on a male fitting that allows the temple to slide and rotate. Also, in some embodiments the temples may be made of a flexible materia! that can be arbitrarily bent to adjust the position of the lens. Furthermore, instead of a plurality of tongs, the eye shield attachment may have a removable component that is inserted down through the rim slot to attach to structure located below the rim of the helmet that ultimately supports the lens.

Obviously, many modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.