WO2014060489A2

WO2014060489A2 - Hand cushion for crutches, canes and other devices

Info

Publication number: WO2014060489A2
Application number: PCT/EP2013/071654
Authority: WO
Inventors: Patrick MOYLAN
Original assignee: Eirtec Research And Development Limited
Priority date: 2012-10-16
Filing date: 2013-10-16
Publication date: 2014-04-24
Also published as: GB201508455D0; GB2522156A; WO2014060489A3; GB2522156B

Abstract

A cushion assembly suitable for attachment to a handle, such as a handle on a crutch, having a resilient cushion element arranged to be positioned on the palmar facing area of a handle, and having means of fastening the cushion element on the handle. The fastening means includes a tubular chassis that partially surrounds the handle, and the cushion element is attached to the chassis, which is directed towards the palmar facing area of the handle. The cushion assembly allows the users fingers and thumb to maintain a firm grip on an exposed area of the handle. This prevents any undesirable lateral movement of the cushion assembly. The cushion element is detachable and maybe held within a pocket on the chassis.

Description

HAND CUSHION FOR CRUTCHES, CANES AND OTHER DEVICES

Field of the Invention

The present invention relates to the field of hand cushions and in particular those for items which have a handle that is gripped by hand, for example devices employed for human mobility assistance, such as ambulatory devices, and in particular to an improved cushion for crutches such as forearm crutch handles.

Background of the Invention

Handles that are held by hand can cause damage such as abrasion and/or soreness. Often it is the part of the hand that has a substantial part of a load applied to it by a handle that suffers the greatest damage. This can be a palmar region of the hand, or may be the fingers. For example crutch handles tend to exert most forces against the palmar region of the hand whereas other handles, such as those found on other equipment, for example wheelbarrows or chainsaws, tend to exert most force against the fingers. The problem of damage to the hands arises commonly with crutches.

Crutches are used to enable those with temporary or permanent functional injury to, or amputation of, the lower limbs to walk. Standard forearm crutches consist of an upright support pole, a load bearing handle that is fixed substantially perpendicular to the support pole, and a forearm retaining cuff. Standard crutches possess limited shock absorption capacity, and tend to be equipped with handles manufactured of hard plastic. During ambulation, the user propels himself by pushing against the crutch handle, and as a consequence, all of the ground reaction force is transferred through the palmar area of the hand. This shift in weight bearing from the lower extremities to the upper extremities can cause pain and injury to the users hand, wrist, elbow and shoulder. Through continual use of standard crutches, the user may, in extreme cases, sustain permanent damage to the median, ulnar and palmar nerves.

Previous attempts have been made to address the problems inherent in standard forearm crutches, including the development of various slip-on pressure relieving handle cushions, but each has major downsides. For example, PCT Pat. No. WO2010100400 (Al), titled "Hand grip and device comprising a hand grip" discloses a handgrip having a rigid body that slides over the crutch handle. The handgrip disclosed in this patent provides shock absorption. However, this hand grip is bulky and can prevent users from forming an adequate grip on the handle, also when downward pressure is applied the hand grip is prone to sudden twisting about the crutch handle and can lead to the users grip becoming unstable.

Patent No. EP 0701807, titled "Support for persons with walking disability", discloses an elastic shock absorber element that completely encloses all around and along the grip's entire length by a casing. However, this design has significant shortcomings. For example, the shock absorber element completely encloses the handle, rather than specifically targeting the palmer region and therefore making it unnecessarily bulky and cumbersome for the user. Another significant drawback is the lack of a means of securing the shock absorber to the crutch support pole, this oversight can result in the shock absorber becoming detached from the crutch handle during ambulation.

United States Patent No. 6,085,765, titled "Forearm crutch cushion system", disclosed a forearm crutch hand grip cushion assembly. However, this design has significant shortcomings. For example, the hand grip cushion assembly surrounds the length of the handle, rather than specifically targeting the palmer region and therefore making it unnecessarily bulky and cumbersome for the user. Also disclosed are interior and posterior hook and pile faster strips that companionate to secure the hand grip cushion assembly to the crutch handle, however, when companionated the hook and pile fasters create a rubbing ridge along the length of the crutch handle. This rubbing ridge can cause discomfort to the users hand during ambulation.

Another undesirable side effect of large bulky hand cushions is that they can lead to the development of joint conditions such as that known as "tennis elbow" in the user. The issue of having a cushioned grip is particularly acute in devices used in assisted walking such as crutches, walking frames, or other handles or grips that are gripped and held by hand.

Summary of the invention

The present invention has therefore been developed with a view to mitigating the above mentioned problems of the prior art.

The present invention overcomes the shortcomings of previous hand cushions, for example those used for crutch handles, by providing a shock absorber cushion assembly which includes a resilient section that can be optimally orientated to support the load bearing area of the hand, and a fastening attachment that includes a chassis manufactured of elastomeric material that partially surrounds a handle, such as a crutch handle, and in that the cushion element forms a detachable connection with the chassis, (optionally with end straps that interlock around a crutch support pole,) thereby ensuring a more stable positioning of the cushion element on the handle, while allowing the users fingers and thumb to maintain a firm grip on an exposed area of the handle, thus preventing any undesirable lateral movement of the cushion assembly. It will be appreciated that for walking frames etc., end straps may not be required.

The prior art has also failed to address the desirability of preconditioning the cushion element as to temperature. Cryotherapy and or thermal therapy, in addition to providing comfort to the user, can also assist in the healing process where the user has suffered injury from continued and/or repetitive use for example from continually using standard forearm crutches.

The present invention is a cushion assembly suitable for attachment to a handle, such as a handle on a crutch, having a resilient cushion element arranged to be positioned on the load imparting area of a handle for example an area facing the palm of the hand or the fingers of the hand, such as a crutch handle, and having means of fastening the cushion element on the handle. According to the invention, the fastening means includes a tubular chassis that partially surrounds a handle, such as a crutch handle, (and optionally end straps that interlock around a support such as a crutch support pole) and the cushion element is attached to the chassis, which is directed towards the load imparting area of the (crutch) handle. In the case where the device in question is a crutch it may be a forearm or underarm crutch. Typically a crutch will comprise a handle that is gripped and which is typically located on a support pole. In the case where the load imparting area faces the palm of the hand, the cushion assembly allows the users fingers and thumb to maintain a firm grip on an exposed area of the handle. This can help prevent any undesirable lateral movement of the cushion assembly. In the case where the load imparting area faces the fingers of the hand, the cushion assembly allows the users palm to maintain a firm grip on an exposed area of the handle.

Desirably the entire cushion assembly is resiliently stretchable. For example the chassis, any bands or straps and the cushion element may all be resiliently stretchable.

In its most basic form, the cushion assembly having a resilient cushion element includes a left side surface, a right side surface, a top surface, a bottom surface, a first end surface, a second end surface, and a fastening mechanism attached to the second end surface and to the bottom surface, from the first end to the second end. The fastening mechanism includes a chassis having a first band that wraps around a handle, such as a crutch handle, perpendicular to the cushion element and proximate to the first end of the cushion element, a second band that wraps around a handle, such as a crutch handle, perpendicular to the cushion element and proximate to the second end of the cushion element, and two elongate end straps proximate to the second end of the cushion element, that extend lengthwardly and interlock around a support for the handle, such as a crutch support pole, to secure the cushion assembly in place, for example to a crutch.

The resilient cushion element being manufactured of a visco-elastic material is orientated to the direction of the load applied, and can compress to absorb and dissipate the load and sudden shocks generated, for example during ambulation, thereby providing comfort and pain relief to the user. The chassis, being of a tubular shape, possesses an opening that leaves part of the handle, such as a crutch handle, uncovered, and the opening is positioned such that the widest point corresponds to the underside centre or overside centre of the handle, thereby, enabling, respectively the user's fingers and thumb or palm to maintain a firm grip on the handle. In a further elaboration of the invention, in addition to providing shock dissipation, the cushion element could also be used to administer thermal therapy to the user's hand. The cushion element can be of the type that retains heat or cold and dissipates that over time. For example it may be placed in a freezer, or a microwave, and brought to the desired temperature prior to being connected to the chassis. It can act to cool or heat the hands over time.

Preferably, the cushion assembly comprises a cushion element (which is separable from the cushion assembly).

Preferably, the cushion element compresses to absorb load.

Preferably, the cushion element comprises a first end surface, a second end surface, a left side surface, a right side surface, a top surface and a bottom surface.

Preferably, the cushion element is manufactured of any resilient visco-elastic material having substantial shock attenuating properties, including, but not limited to silicone gel, polyurethane (PU), chloroprene or thermoplastic elastomer (TPE). However, in a preferred embodiment the cushion element is manufactured of material having a hardness of between 20 and 80 on the Shore durometer "000" scale. The material may be any suitable elastomeric material such as polyurethane material; a styrene material such as styrene ethylene butylene styrene (SEBS); or a polychloroprene material such as those materials commonly referred to as neoprene. Desirably the cushion element is dimensioned such that the distance from the bottom surface to the shortest point on the top surface is from about 4mm to about 10mm, and such that the distance from the bottom surface to the tallest point on the top surface is from about 4mm to about 16mm. The left side surface, right side surface and top surface each have a convex profile, and while in use, the cushion element and chassis conform to the shape of the handle, thereby giving the cushion element a largely convex shape.

Preferably, the resilient cushion element is orientated to the direction of the load applied, and can compress to absorb and dissipate the load and sudden shocks generated, for example during ambulation, thereby providing comfort and pain relief to the user. Preferably, the cushion assembly comprises a chassis on which the cushion element is mounted.

Preferably, the cushion element is detachable from the chassis. A hook and loop fastener (such as those sold under the brand Velcro®) in particular is considered suitable for the detachable connection. Preferably, the cushion element may be available in a variety of hardnesses. Further that the cushion element may be detachable from the chassis and replaceable with a cushion element having a different hardness. Preferably, the cushion element comprises an external cover.

Preferably, the external cover completely covers the left side surface, right side surface, first end surface, top surface, and at least partially covers the bottom and second end surfaces. The cushion cover can be manufactured of any suitable material including fabric, chloroprene or leather, and desirably includes a means of securing the cushion cover to the cushion element. The external cover is desirably resiliently stretchable for example constructed of an elastomeric material.

Preferably, the chassis comprises a tubular body having a first end, a second end, an internal surface and an external surface.

Preferably, the chassis comprises a cylindrical cavity for receiving a handle such as a crutch handle. Preferably, the cylindrical cavity runs from the first end to the second end.

Preferably, the cylindrical cavity is dimensioned to have a smaller radius than that of the handle and that the chassis has to stretch in order to receive the handle.

Preferably, the chassis at least partially surrounds the handle, and in the preferred embodiment the chassis has an opening that leaves part of the handle uncovered, thereby allowing the fingers and thumb of the user to grip the handle. Consequently, the cushion assembly in no way impedes the users grip on the handle.

Preferably, the chassis is manufactured of a latex free elastomeric material. Preferably, the chassis comprises a forward band and a rearward band.

Preferably, the bands have a radius of between 13mm and 18mm. However, the band radius could be varied to accommodate handles, for example crutch handles, of differing sizes. Preferably, the forward band and rearward band are smaller than the handle, therefore necessitating the bands to stretch in order to fit over the handle, and the elasticity of the bands provides circumferential gripping force on the handle. Further, the elasticity of the material enables the chassis to stretch and conform to handles of various shapes and sizes. Preferably, the bands circumferential gripping force secures the chassis to the handle. However, it should be noted that any other means of securing the chassis to the handle may be employed, such as an adhesive strip or the like. In one arrangement the chassis has a non-slip underside that abuts a surface of the handle. For example the underside may comprise a non-slip material and/or a non-slip textured surface. Desirably the non-slip underside is resiliently stretchable for example made of elastomeric material.

Preferably, the chassis extends lengthways beyond the second end to form elongated end straps. Such end straps could be on one or both ends.

Preferably, the end straps are adapted to extend around a support such as a crutch support pole and that the ends of the straps partially overlap and companionate, preferably by way of hook and loop fastener.

Preferably, the chassis is manufactured of an elastomeric material and that the external surface is provided with a hook compatible laminate (within a hook and loop fastener arrangement). Preferably, the chassis comprises a pair of opposing elongated forward straps.

Preferably, at least one forward strap is provided with a hook fastening surface (within a hook and loop fastener arrangement). Preferably, the forward straps partially overlap to form a forward band. The hook fastening surface of one strap companionating with the hook compatible surface on its opposing strap, to form a hook and loop fastener.

Preferably, the forward straps are for releasably retaining a handle, such as a crutch handle.

Preferably, the chassis comprises a pair of opposing elongate rearward straps.

Preferably, at least one rearward strap is provided with a hook fastening surface. Preferably, the rearward straps partially overlap to form a rearward band. The hook fastening surface of one strap companionating with the hook compatible surfaces on its opposing strap, to form a hook and loop fastener.

Preferably, the rearward straps are for releasably retaining a handle, such as a crutch handle.

Preferably, the chassis comprises a pocket to removably receive and retain a cushion element. Preferably, the pocket extends from the first end to the second end, and that the pocket opening is proximate to the second end.

Preferably, the chassis is adapted to retain ergonomically shaped handles.

Preferably, the adapted chassis comprises left lateral and right lateral folds.

Preferably, the folds partially fit around ergonomically shaped handles. Preferably, the cushion element can be preconditioned as to temperature, prior to connection to the chassis. Desirably it is made of a material that can act as a heat sink to cool a hand and/or that can act as a heat reservoir to heat a hand.

The present invention also provides a cushion assembly suitable for attachment to a handle such as a handle on a crutch, having a resilient cushion element arranged to be positioned on the load imparting area of a handle such as a crutch handle, and having means of fastening the cushion element on the handle wherein the resilient cushion element is detachable from the fastening means. The cushion element is desirably a shaped block of cushioning material. In one arrangement the fastening means comprises a pocket to removably receive and retain a cushion element. Such a device may have any construction as set out above. In particular it is desirable that the fastening means includes a tubular chassis for partially surrounding a handle such as a crutch handle and the cushion element is carried by the chassis, which is directed towards the load imparting area of the handle. The cushion assembly allows the users fingers and thumb to maintain a firm grip on an exposed area of the handle while the palm is cushioned or vice versa. This prevents any undesirable lateral movement of the cushion assembly.

A device of the invention is easy to use and apply to any handle. It provides great comfort to a user and in particular relieves soreness associated with continued gripping of a handle.

Brief description of the Drawings

Figure 1 illustrates a perspective view of an embodiment of a crutch cushion assembly according to the invention;

Figure 2 illustrates a (partial) side view of the crutch cushion assembly illustrated in Fig 1, connected to a forearm crutch;

Figure 3 illustrates a (partial) side view of the crutch cushion assembly illustrated in Fig 1, connected to a forearm crutch, with the cushion element detached; Figure 4 illustrates a (partial) cross sectional view of the crutch cushion assembly illustrated in Fig 1, along section line 4-4 of Fig 2, connected to a forearm crutch; Figure 5 illustrates a (partial) perspective view of a crutch cushion assembly according to a second embodiment of the invention;

Figure 6 illustrates a perspective view of a crutch cushion assembly according to a third embodiment of the invention, with the cushion element detached;

Figure 7 illustrates a (partial) side view of the crutch cushion assembly illustrated in Fig 6 and in partially cut-away view, connected to a forearm crutch, with the cushion element attached;

Figure 8 illustrates a perspective view of a crutch cushion assembly according to a fourth embodiment of the invention, with the cushion element detached;

Figure 9 illustrates a (partial) cross sectional view of the crutch cushion assembly illustrated in Fig 8, taken along section line 9-9 of Fig 8, connected to a forearm crutch, with the cushion element attached; Figure 10 illustrates a perspective view of a crutch cushion assembly according to a fifth embodiment of the invention, with the cushion element detached;

Figure 11 illustrates a (partial) perspective view of the crutch cushion assembly illustrated in Fig 10, connected to an underarm crutch, with the cushion element attached;

Figure 12 illustrates a perspective view of a sports cushion assembly according to a sixth embodiment of the invention, with the cushion element detached; and

Figure 13 illustrates a perspective view of the sports cushion assembly illustrated in Fig 12, connected to a sports bat, with the cushion element attached.

Detailed Description of the Drawings

Referring now to figures 1 to 4 of the accompanying drawings, there is illustrated a crutch cushion assembly, generally indicated as 10, which is primarily intended for use with assistive devices such as forearm crutches, walking sticks, walking poles or any other device having a load bearing hand grip.

The crutch cushion assembly 10 comprises a chassis 12 and a cushion element 14. In use the chassis 12 and cushion element 14 are secured together by any suitable means, for example moulded, welded, glued or hook and loop fastener. In the embodiment illustrated, the chassis 12 and cushion element 14 are secured together by hook and loop fastener 16. The chassis 12 having a hook or loop fastening surface 20, and the cushion element 14 having a corresponding hook or loop fastening surface 40, fastening surfaces 20 and 40 companionate to form hook and loop fastener 16. It is preferable that the cushion element 14 is removably mounted to the chassis 12 in order to enable the swapping of cushion element 14 for another cushion element 14 having a different hardness, or to facilitate maintenance and/or cleaning.

The chassis 12 is essentially elongate and comprises a main body 15 having a cylindrical cavity 18, for receiving a crutch handle, extending from a first end 17 to a second end 19, a left end strap 26, a right end strap 28, a rearward flange 36 and an opening 38 that forms a forward band 22 and a rearward band 24. The left end strap 26 having a hook fastening surface 30 and the right end strap 28 having a loop fastening surface 32.

In the embodiment illustrated, fastening surfaces 30 and 32 companionate to form hook and loop fastener 34 around a crutch support pole. However, it should be noted that any other means of securing the end straps around the support pole may be employed, such as a snap fastener or the like. The preferred chassis 12, is manufactured of any latex free elastomeric material.

The cushion element 14 includes a left side surface 42, a right side surface 44, a top surface 46, a bottom surface 48, a first end surface 50 and a second end surface 52. Preferably, the cushion element 14 is manufactured of any shock-attenuating resilient visco-elastic material, including, but not limited to silicone gel, polyurethane (PU), chloroprene or thermoplastic elastomer (TPE). However, in a preferred embodiment the cushion element 14 is manufactured of PU gel with a hardness rating of between 20 and 80 on the Shore durometer "000" scale. The left side surface 42, right side surface 44 and top surface 46 each have a convex profile, and while in use, the cushion element 14 and chassis 12 conform to the shape of the crutch handle 62, thereby giving the cushion element 14 a largely convex shape, with the bottom surface 48 adopting a concave profile. The second end surface 52 having a concave profile abuts against the rearward flange 36, and the rearward flange 36 abuts against the crutch support pole 64. The preferred cushion element 14, may include a cushion cover 56. The cushion cover 56 can be manufactured of fabric, chloroprene, leather or other suitable material. The cushion cover 56 adheres to the left side surface 42, the right side surface 44, the top surface 46 and may at least partially adheres to the bottom surface 48 and to the second surface 52. Referring in particular to Figure 2 the crutch cushion assembly 10 is in use on a forearm crutch, with the cushion element 14 connected to the chassis 12. Readily visible is a forearm crutch 60 having a support pole 64 and a hand grip 62. The cushion assembly 10 is mounted on the crutch 60, with the handle 62 seated within the cylindrical cavity 18. The chassis 12 partially surrounds the handle 62. The section of the handle 62 that extends forwards beyond the first end 17 and the underside centre section corresponding to opening 38 remain uncovered. The forward band 22 and rearward band 24 wrap around the crutch handle 62. The bands 22 and 24, having a smaller at rest radius than the crutch handle 62, stretch to fit the handle 62, resulting in the bands 22 and 24 exerting a griping force on the handle 62. This griping force prevents any undesirable lateral movement of the crutch cushion assembly 10 during ambulation. The opening 38 in the chassis 12 leaves an area of the handle 62 uncovered, enabling the user to maintain an unrestricted grip on the lower surface of the handle 62, thereby making the crutch cushion assembly 10 very stable and comfortable to use, and avoiding any unnecessary bulkiness. The right end strap 28 is overlapping the left end strap 26 and the fastening surfaces 30 and 32 are connected to form hook and loop fastener 34, thereby securing the chassis 12 to the support pole 64.

Referring in particular to Figure 3 the crutch cushion assembly 10 is in use on a forearm crutch 60, with the cushion element 14 disconnected from the chassis 12. Readily visible is a forearm crutch 60 having a support pole 64 and a hand grip 62. The cushion assembly 10 is mounted on the crutch 60, with the handle 62 seated within the cylindrical cavity 18 and the main body section 15 is directed towards the palmar facing area of a crutch handle. (It will be appreciated that if the device of the invention was in use on a handle where the load was imparted to the fingers then essentially it could be inverted so that the cushion element cushioned the fingers and the palm gripped the exposed area of the handle.) It is preferable that the cushion element 14 is removably mounted to the chassis 12 in order to enable maintenance and/or cleaning. Having a removably mounted cushion element 14 facilitates the removal and replacement of the cushion element 14 with a cushion element 14 having a different hardness. The desired hardness of the cushion element 14 to be installed, may be dictated by the users body weight or the terrain that user intends traversing. Thanks to the removable mounting, installing the chassis 12 onto the crutch handle 62, and maintenance of the crutch cushion assembly 10 is made very easy.

Referring in particular to Figure 4 there is illustrated a cross sectional view of the crutch cushion assembly 10 along section line 4-4 of Fig 2, with the cushion element 14 attached to the chassis 12. The chassis 12 and cushion element 14 are secured together by hook and loop fastener 16. The external cover 56 covers the left side surface 42, the right side surface 44, the top surface 46, and the bottom surface 48 of the cushion element 14. The cushion cover 56 can be manufactured of any material, including, but not limited to fabric, chloroprene or leather, and includes a means of securing the cushion cover 56 to the cushion element 14.

Referring now to Figure 5 there is illustrated a second embodiment of a crutch cushion assembly according to the present invention, generally indicated as 110, in which second embodiment like components have been accorded like reference numerals and unless otherwise stated perform a like function. The crutch cushion assembly 110 is provided with an ergonomically shaped chassis 112 and an ergonomically shaped cushion element 114. In this embodiment, chassis 112 is further provided with a left lateral fold 123 and a right lateral fold 125. The left lateral fold 123 hooks around the left outer edge of an ergonomically shaped crutch handle (not shown) and the right lateral fold 125 hooks around the right outer edge of an ergonomically shaped crutch handle (not shown), thus preventing any undesirable lateral movement of the crutch cushion assembly 110, while in use on a forearm crutch having an en ergonomically shaped handle.

Referring now to Figures 6 and 7 there is illustrated a third embodiment of a crutch cushion assembly according to the present invention, generally indicated as 210, in which third embodiment like components have been accorded like reference numerals and unless otherwise stated perform a like function. The crutch cushion assembly 210 is provided with a chassis 212 and a cushion element 214. In use the chassis 212 and cushion element 214 are secured together by any suitable means, for example moulded, welded, glued or hook and loop fastener. In the embodiment illustrated, chassis 212 and cushion element 214 are (detachably) secured together by hook and loop fastener 216. The chassis 212 having a hook or loop fastening surface 220, and the cushion element 214 having a corresponding fastening surface 240, fastening surfaces 220 and 240 together form hook and loop fastener 216. It is preferable that the cushion element 214 is removably connected to the chassis 212.

The chassis 212 consists of a main body 215 having a fastening surface 220 running from the first end 217 to the second end 219, a left forward strap 221, a right forward strap 227, a left rearward strap 231, a right rearward strap 233, a left end strap 226 and a right end strap 228. Forward straps 221 and 227 are essentially elongate, and opposedly and sidewardly extend from the main body 215, proximate to the first end 217. Rearward straps 231 and 233 are essentially elongate and opposedly and sidewardly extend from the main body 215, proximate to the second end 219. End straps 226 and 228 are essentially elongate, and lengthwardly extend from the main body 215, proximate to the second end 219. Right forward strap 227 is provided with a hook fastening surface 229, right rearward strap 233 is provided with a hook fastening surface 235 and right end strap 228 is provided with a hook fastening surface 232. Preferably chassis 212 is manufactured of a single piece foam backed releasable hook compatible laminate, such as chloroprene having a nylon plush laminate. However it should be noted that the chassis 212 could be manufactured of any suitable material.

The cushion element 214 includes a left side surface 242, a right side surface 244, a top surface 246, a bottom surface 248, a first end surface 250 and a second end surface 252. Preferably, the cushion element 214 is manufactured of any shock attenuating resilient visco-elastic material, including, but not limited to silicone gel, polyurethane (PU), chloroprene or thermoplastic elastomer (TPE). However, in a preferred embodiment the cushion element is manufactured of PU having hardness of between 20 and 80 on the Shore durometer "000" scale, and the cushion element is dimensioned such that the distance from the bottom surface to the shortest point on the top surface is between 4mm and 10mm, and such that the distance from the bottom surface to the tallest point on the top surface is between 4mm and 16mm. The cushion element 214 is provided with a hook or loop fastening surface 240 that covers the left side surface 242, the top surface 246, the right side surface 244 and the first end surface 250. The chassis body 215 is dimensioned to fit over the cushion element 214 and is interiorly provided with a hook or loop fastening surface 220. Fastening surfaces 220 and 240 companionate to form hook and loop fastener 216, thereby removably connecting the cushion element 214 to the chassis 212.

Referring in particular to Figure 6 the crutch cushion assembly 210 is illustrated with the cushion element 214 detached from the chassis 212.

Referring in particular to Figure 7 the crutch cushion assembly 210 is in use on a crutch 260, with the cushion element 214 connected to the chassis 212. Readily visible is a forearm crutch 260 having a support pole 264 and a hand grip 262. The cushion assembly 210 is mounted on the crutch 260, with the handle 262 seated within the cylindrical cavity 218. The crutch cushion assembly 210 is secured to the crutch handle 262 by straps 221, 227, 231 and 233, and to the crutch support pole 264 by end straps 226 and 228. Forward straps 221 and 227 are opposedly wrapped around a forward section of the handle 262 and secured together to form forward band 222. The end of strap 227 overlaps a portion of strap 221 and the hook fastening surface 229 companionates with the hook compatible surface on strap 221 to form a hook and loop fastener. Rearward straps 231 and 233 are opposedly wrapped around a rearward section of the handle 262, and secured together to form rearward band 224. The end of strap 233 overlaps a portion of strap 231 and the hook fastening surface 235 companionates with the hook compatible surface on strap 231 to form a hook and loop fastener. End straps 226 and 228 are opposedly wrapped around a section of the support pole 264 and secured together, the end of strap 228 overlaps a portion of strap 226 and the hook fastening surface 232 companionates with the hook compatible surface on strap 226 to form a hook and loop fastener. The loop compatible laminate on the exterior surface of the chassis 212 is clearly visible.

Handle 262 is retained within the cylindrical cavity 218 formed by bands 222 and 224. Bands 222 and 224 exert a circumferential gripping force on the handle 262. The circumferential gripping force of band 222 can be increased by stretching straps 221 and 227 prior to securement, and once the desired gripping force is attained, the overlapping fastening portions of the straps are pressed together to form a hook and loop fastener. The circumferential gripping force of band 224 can be increased by stretching straps 231 and 233 prior to securement, and once the desired gripping force is attained, the overlapping fastening portions of the straps are pressed together to form a hook and loop fastener. The overlapping securement mechanism allows the chassis 212 to connect to crutch handles of various sizes.

The chassis 212 partially surrounds the handle 262. The section of the handle 262 that extends forwards beyond the first end 217 of chassis 212 and the underside centre section corresponding to opening 238 remain uncovered. The opening 238 enables the user to maintain an unrestricted grip on the lower surface of the handle 262.

Referring now to Figures 8 and 9 there is illustrated a fourth embodiment of a crutch cushion assembly according to the present invention, generally indicated as 310, in which fourth embodiment like components have been accorded like reference numerals and unless otherwise stated perform a like function. The crutch cushion assembly 310 is provided with a chassis 312 and a cushion element 314. In the embodiment illustrated, the chassis 312 is provided with a pocket 339 to removably receive and retain the cushion element 314.

The chassis 312 consists of a main body 315 having first end 317, a second end 319, a left forward strap 321, a right forward strap 327, a left rearward strap 331, a right rearward strap 333, a left end strap 326 and a right end strap 328. Forward straps 321 and 327 are essentially elongate, and opposedly and sidewardly extend from the main body 315, proximate to the first end 317. Rearward straps 331 and 333 are essentially elongate and opposedly and sidewardly extend from the main body 315, proximate to the second end 319. End straps 326 and 328 are essentially elongate, and lengthwardly extend from the main body 315, proximate to the second end 319. Right forward strap 327 is provided with a hook fastening surface 329, right rearward strap 333 is provided with a hook fastening surface 335 and right end strap 328 is provided with a hook fastening surface 332.

Chassis 312 is further provided with a lower lining 337, the lower lining 337 partially covers the underside of chassis 312 and together with the main body 315 form a pocket 339, the opening to the pocket 339 is proximate to the chassis second end 319. The lower lining 337 forms a non-slip relationship with a handle to which the assembly is applied. It may be made of non-slip material and/or textured to achieve the non-slip characteristics. The pocket 339 is dimensioned to removably receive and retain the cushion element 314. In the embodiment illustrated, the lower lining 337 is partially secured to the underside of chassis body 315 by stitching along its outer edges. However, it should be noted that any other means of securing lower lining 337 to the chassis body 315 may be employed, such as gluing or the like. Preferably, the chassis 312 is manufactured of a foam backed releasable hook compatible laminate, such as chloroprene having a nylon plush laminate. However it should be noted that the chassis 312 could be manufactured of any suitable material.

The cushion element 314 includes a left side surface 342, a right side surface 344, a top surface 346, a bottom surface 348, a first end surface 350 and a second end surface 352. Preferably, the cushion element 314 is manufactured of any shock attenuating resilient visco-elastic material, including, but not limited to silicone gel, polyurethane (PU), chloroprene or thermoplastic elastomer (TPE). However, in a preferred embodiment the cushion element is manufactured of PU having hardness of between 20 and 80 on the Shore durometer "000" scale, and the cushion element is dimensioned such that the distance from the bottom surface to the shortest point on the top surface is between 4mm and 10mm, and such that the distance from the bottom surface to the tallest point on the top surface is between 4mm and 16mm. Referring in particular to Figure 8 the crutch cushion assembly 310 is illustrated with the cushion element 314 disconnected from the chassis 312.

Referring in particular to Figure 9 the crutch cushion assembly 310 is in use on a crutch 360, with the cushion element 314 retained within pocket 339. Readily visible is a forearm crutch 360 having a support pole 364 and a hand grip 362. The cushion assembly 310 is mounted on the crutch 360, with the handle 362 seated within the cylindrical cavity 318. The cushion element 314 is removably retained within pocket 339 with the second end surface 352 (not shown) abutting against support pole 364. Rearward straps 331 and 333 are opposedly wrapped around a rearward section of the handle 362 with the end of strap 333 overlapping a portion of strap 331 and the hook fastening surface 335 securing rearward strap 333 to rearward strap 331. The handle 362 is retained within the cylindrical cavity 318 formed by the lower lining 337 and the partially overlapping straps 331 and 333. End straps 326 and 328 are opposedly wrapped around support pole 364, with the end of strap 328 overlapping a portion of strap 326 and the hook fastening surface 332 securing strap 328 to strap 326. The loop compatible laminate on the exterior surface of the chassis 312 is clearly visible. In addition to providing shock dissipation, the cushion element 314 could also be used to administer thermal therapy to the user's hand. The cushion element 314 can be placed in a freezer, or a microwave, and brought to the desired temperature prior to being inserted into pocket 339, thereby delivering cryotherapy or thermal therapy to the user while ambulating. Referring now to Figures 10 and 11 there is illustrated a fifth embodiment of a crutch cushion assembly according to the present invention, generally indicated as 410, in which fifth embodiment like components have been accorded like reference numerals and unless otherwise stated perform a like function. The crutch cushion assembly 410, adapted for underarm crutches, is provided with a chassis 412 and a cushion element 414. In the embodiment illustrated, the chassis 412 is provided with a pocket 439 to removably receive and retain the cushion element 414.

The chassis 412 consists of a main body 415 having first end 417, a second end 419, a left first end strap 453, a right first end strap 454, a left forward strap 421, a right forward strap 427, a left rearward strap 431, a right rearward strap 433, a left second end strap 426, a right second end strap 428 and an end flap 457. Forward straps 421 and 427 are essentially elongate, and opposedly and sidewardly extend from the main body 415, proximate to the first end 417. Rearward straps 431 and 433 are essentially elongate and opposedly and sidewardly extend from the main body 415, proximate to the second end 419. First end straps 453 and 454 are essentially elongate, and lengthwardly extend from the main body 415, proximate to the first end 417. Second end straps 426 and 428 are essentially elongate, and lengthwardly extend from the main body 415, proximate to the second end 419. Right first end strap 454 is provided with a hook fastening surface 455, right forward strap 427 is provided with a hook fastening surface 429, right rearward strap 433 is provided with a hook fastening surface 435 and right end strap 428 is provided with a hook fastening surface 432.

Chassis 412 is further provided with a lower lining 437, the lower lining 437 partially covers the underside of chassis 412 and together with the main body 415 form a pocket 439, the opening to the pocket 439 is proximate to the chassis second end 419. The lower lining 437 forms a non-slip relationship with a handle to which the assembly is applied. It may be made of non-slip material and/or textured to achieve the non-slip characteristics. The pocket 439 is dimensioned to removably receive and retain the cushion element 414. Lower lining 437 lengthwardly extends beyond the second end 419 to form end flap 458. End flap 458 is provided with a hook fastening surface 459. End flaps 457 and 458 companionate to secure the cushion element 414 within pocket 439. In the embodiment illustrated, the lower lining 437 is secured to the underside of chassis body 415 by stitching along its outer edges, with end flap 458 remaining unsecured.

However, it should be noted that any other means of securing lower lining 437 to the chassis body 415 may be employed, such as gluing or the like. Preferably, the chassis 412 is manufactured of a foam backed releasable hook compatible laminate, such as chloroprene having a nylon plush laminate. However it should be noted that the chassis 412 could be manufactured of any suitable material.

The cushion element 414 includes a left side surface 442, a right side surface 444, a top surface 446, a bottom surface 448, a first end surface 450 and a second end surface 452. Preferably, the cushion element 414 is manufactured of any shock attenuating resilient visco-elastic material, including, but not limited to silicone gel, polyurethane (PU), chloroprene or thermoplastic elastomer (TPE). However, in a preferred embodiment the cushion element is manufactured of PU having hardness of between 20 and 80 on the Shore durometer "000" scale, and the cushion element is dimensioned such that the distance from the bottom surface to the shortest point on the top surface is between 4mm and 10mm, and such that the distance from the bottom surface to the tallest point on the top surface is between 4mm and 16mm. Referring in particular to Figure 10 the crutch cushion assembly 410 is illustrated with the cushion element 414 disconnected from the chassis 412.

Referring in particular to Figure 11 the crutch cushion assembly 410 is in use on an underarm crutch 470. Readily visible is underarm crutch 470 having support poles 474 and 476, and handle 472. The cushion assembly 410 is mounted on the crutch 470, with the handle 472 seated within the cylindrical cavity 418. The cushion element 414 (not shown) is removably retained within pocket 439 (not shown). Forward straps 421 and 427 are opposedly wrapped around a forward section of the handle 472 with the end of strap 427 overlapping a portion of strap 421 and the hook fastening surface 429 securing forward strap 427 to forward strap 421, forming forward band 422. Rearward straps 431 and 433 are opposedly wrapped around a rearward section of the handle 472 with the end of strap 433 overlapping a portion of strap 431 and the hook fastening surface 435 securing rearward strap 433 to rearward strap 431, forming rearward band 424. The handle 472 is retained within the cylindrical cavity 418 formed by the lower lining 437 (not shown) and the partially overlapping forward straps 421 and 427 and the partially overlapping rearward straps 431 and 433. First end straps 453 and 454 are opposedly wrapped around support pole 474, with the end of strap 454 overlapping a portion of strap 453 and the hook fastening surface 455 securing strap 454 to strap 453. Second end straps 426 and 428 are opposedly wrapped around support pole 476, with the end of strap 428 overlapping a portion of strap 426 and the hook fastening surface 432 securing strap 428 to strap 426. The loop compatible laminate on the upper surface of the chassis 412 is clearly visible.

In addition to providing shock dissipation, the cushion element 414 could also be used to administer thermal therapy to the user's hand. The cushion element 414 can be placed in a freezer, or a microwave, and brought to the desired temperature prior to being inserted into pocket 439, thereby delivering cryotherapy or thermal therapy to the user while ambulating.

Referring now to Figures 12 and 13 there is illustrated a sixth embodiment of a cushion assembly according to the present invention, generally indicated as 510, in which sixth embodiment like components have been accorded like reference numerals and unless otherwise stated perform a like function. The sports cushion assembly 510 is provided with a chassis 512 and a cushion element 514. In the embodiment illustrated, the chassis 512 is provided with a pocket 539 to removably receive and retain the cushion element 514.

The chassis 512 consists of a main body 515 having first end 517, a second end 519, a left forward strap 521, a right forward strap 527, a left rearward strap 531, a right rearward strap 533 and an end flap 557. Forward straps 521 and 527 are essentially elongate, and opposedly and sidewardly extend from the main body 515, proximate to the first end 517. Rearward straps 531 and 533 are essentially elongate and opposedly and sidewardly extend from the main body 515, proximate to the second end 519. Right forward strap 527 is provided with a hook fastening surface 529 and right rearward strap 533 is provided with a hook fastening surface 535.

Chassis 512 is further provided with a lower lining 537, the lower lining 537 partially covers the underside of chassis 512 and together with the main body 515 form a pocket 539, the opening to the pocket 539 is proximate to the chassis second end 519. The pocket 539 is dimensioned to removably receive and retain the cushion element 514. Lower lining 537 lengthwardly extends beyond the second end 519 to form end flap 558. End flap 558 is provided with a hook fastening surface 559. End flaps 557 and 558 companionate to secure the cushion element 514 within pocket 539. In the embodiment illustrated, the lower lining 537 is secured to the underside of chassis body 515 by stitching along its outer edges, with end flap 558 remaining unsecured. However, it should be noted that any other means of securing lower lining 537 to the chassis body 515 may be employed, such as gluing or the like. Preferably, the chassis 512 is manufactured of a foam backed releasable hook compatible laminate, such as chloroprene having a nylon plush laminate. However it should be noted that the chassis 512 could be manufactured of any suitable material.

The cushion element 514 includes a left side surface 542, a right side surface 544, a top surface 546, a bottom surface 548, a first end surface 550 and a second end surface 552. Preferably, the cushion element 514 is manufactured of any shock attenuating resilient visco-elastic material, including, but not limited to silicone gel, polyurethane (PU), chloroprene or thermoplastic elastomer (TPE). However, in a preferred embodiment the cushion element is manufactured of PU having hardness of between 20 and 80 on the Shore durometer "000" scale, and the cushion element is dimensioned such that the distance from the bottom surface to the shortest point on the top surface is between 4mm and 10mm, and such that the distance from the bottom surface to the tallest point on the top surface is between 4mm and 16mm.

Referring in particular to Figure 12 the crutch cushion assembly 510 is illustrated with the cushion element 514 removed from the chassis 512.

Referring in particular to Figure 13 the cushion assembly 510 is in use on a sports bat 580. Readily visible is a bat 580 having a handle 582. The cushion assembly 510 is mounted on the bat 580, with the handle 582 seated within the cylindrical cavity 518. The cushion element 514 (not shown) is releasably retained within pocket 539 (not shown) by the partially overlapping end flaps 557 and 558. The hook fastening surface 559 companionating with the hook compatible laminate surface of end flap 557 to form a hook and loop fastener. Forward straps 521 and 527 are opposedly wrapped around a forward section of the handle 582 with the end of strap 527 overlapping a portion of strap 521 and the hook fastening surface 529 securing forward strap 527 to forward strap 521, forming forward band 522. Rearward straps 531 and 533 are opposedly wrapped around a rearward section of the handle 582 with the end of strap 533 overlapping a portion of strap 531 and the hook fastening surface 535 securing rearward strap 533 to rearward strap 531, forming rearward band 524. The handle 582 is retained within the cylindrical cavity 518 formed by the lower lining 537 (not shown) and the partially overlapping forward straps 521 and 527 and the partially overlapping rearward straps 531 and 533. The loop compatible laminate on the exterior surface of the chassis 512 is clearly visible.

In the embodiment illustrated, cushion assembly 510 is in use on a sports bat 580. However, it should be noted that the cushion assembly 510 could be used on any sports, recreational or ambulatory device, including, but not limited to a baseball bat, cricket bat, hurley, hockey stick, tennis racket or walking frame. In addition to providing shock dissipation, the cushion element 514 could also be used to administer thermal therapy to the user' s hand. The cushion element 514 can be placed in a freezer, or a microwave, and brought to the desired temperature prior to being inserted into pocket 539, thereby delivering cryotherapy or thermal therapy to the user while engaging in recreational activities.

The invention is not limited to the embodiments described herein but can be amended or modified without departing from the scope of the present invention.

The words "comprises/comprising" and the words "having/including" when used herein with reference to the present invention are used to specify the presence of stated features, integers, steps or components but do not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination.

Claims

1. A cushion assembly suitable for attachment to a handle, having a resilient cushion element arranged to be positioned on a load imparting area of a handle, and having means of fastening the cushion element on the handle, the fastening means includes a tubular chassis that partially surrounds a handle leaving an exposed area of the handle, and the cushion element is attached to the chassis, which is directed towards the load imparting area of the handle, the cushion assembly allowing a users fingers and thumb or palm to maintain a firm grip on the exposed area of the handle.

2. A cushion assembly according to Claim 1 wherein the fastening mechanism includes a chassis having a first band that wraps around a handle, perpendicular to the cushion element and proximate to a first end of the cushion element, a second band that wraps around a handle, perpendicular to the cushion element and proximate to a second end of the cushion element, and optionally further including two elongate end straps proximate to the second end of the cushion element, that extend lengthwardly and interlock around a support for the handle.

3. A cushion assembly according to Claim 2 wherein the first and/or second band is openable for detachably attaching to handle for example wherein the first and/or second band comprises overlapping straps.

4. A cushion assembly according to any preceding claim wherein the chassis is of a tubular shape and possesses an opening that leaves part of the handle uncovered, and the opening is positioned to correspond to the underside centre or overside centre of the handle.

5. A cushion assembly according to any preceding claim wherein the cushion assembly comprises a cushion element which is detachable from the cushion assembly, for example a cushion element that is detachable from the chassis.

6. A cushion assembly according to any preceding claim wherein the cushion element comprises an external cover.

7. A cushion assembly according to any preceding claim wherein the cushion element is receivable within a pocket carried on the chassis.

8. A cushion assembly according to any preceding claim wherein the tubular chassis is adapted to be stretch- fitted over the handle.

9. A cushion assembly according to any preceding claim wherein the tubular chassis has a non-slip underside that abuts a surface of the handle.

10. A cushion assembly according to any preceding claim wherein the tubular chassis is adapted to retain ergonomically shaped handles.

11. A cushion assembly according to any preceding claim wherein the cushion element is constructed of a material that can act as a heat sink to cool a hand or a heat reservoir to heat a hand or both.

12. A cushion assembly suitable for attachment to a handle, having a resilient cushion element arranged to be positioned on the load imparting area of a handle, and having means of fastening the cushion element on the handle wherein the resilient cushion element is detachable from the fastening means.

13. A cushion assembly according to claim 12 wherein the fastening means comprises a pocket to removably receive and retain a cushion element.

14. A cushion assembly according to any preceding claim wherein the cushion element is constructed of a material that has hardness of from about 20 to about 80 on the Shore durometer "000" scale; and/or wherein the material is an elastomeric material, desirably a resilient visco-elastic material having substantial shock attenuating properties; and/or wherein the material is a silicone polymer for example an elastomeric and/or gel material, a polyurethane material, a styrene material such as styrene ethylene butylene styrene (SEBS), or a polychloroprene material such as those materials commonly referred to as neoprene or a thermoplastic elastomer (TPE).

15. A cushion assembly according to any preceding claim wherein the cushion element is dimensioned such that in a load bearing area of the cushion element the distance from its bottom surface to the shortest point on its top surface is from about 4mm to about 10mm, and optionally in a load bearing area of the cushion element such that the distance from the bottom surface to the tallest point on the top surface is from about 4mm to about 16mm.