Wheelchair occupant restraint system
A wheelchair occupant restraint system may include a wheelchair having a frame supporting a number of wheels, a seat mounted to the frame, and a first web securing the frame to the seat. Alternatively or additionally, a second tether may secure a shoulder belt support to a support surface remote from the wheelchair, wherein the shoulder belt support is mounted to a seat back of the wheelchair. Alternatively or additionally, an occupant restraint system, which may have some components mounted to or integral with the wheelchair and others not mounted to or integral with the wheelchair, may include one or more restraint webs that have at least one indicator identifying respective portions of the one or more restraint webs that connect together.
This patent application claims priority to and the benefit of U.S. Provisional Patent Application Ser. No. 60/551,189, filed Mar. 8, 2004, the disclosure of which is incorporated herein by reference.
FIELD OF THE INVENTIONThe present invention relates generally to wheelchair restraint systems, and more specifically to wheelchair and wheelchair occupant restraint systems.
BACKGROUNDConventional wheelchair tie-down occupant restraint systems are used in automotive and other applications for the purpose of securing the wheelchair to a support surface or surfaces. For use in motor vehicles, the design and performance of such wheelchair tie-down and occupant restraint systems are addressed in a Society of Automotive Engineers (SAE) J2249 recommended practice standard entitled WHEELCHAIR TIEDOWN AND OCCUPANT RESTRAINT SYSTEM FOR USE IN MOTOR VEHICLES. The American National Standards Institute (ANSI) and the Rehabilitation Engineering and Assistive Technology Society of North America (RESNA) have proposed an ANSI/RESNA standard section 19, and the International Organization for Standardization (ISO) has proposed an ISO 10542-1 standard, both for the purpose of promoting occupant safety and to reduce the risk of injury for motor-vehicle occupants who remain seated in their wheelchairs during transit, by suggesting improvements relating to the crashworthiness of wheelchairs that conform with their requirements. The SAE J2249, ANSI/RESNA section 19 and ISO 10542-1 standards are incorporated herein by reference.
SUMMARYThe present invention may comprise one or more of the features recited in the attached claims and the following features and combinations thereof. A wheelchair occupant restraint system comprises a wheelchair having a frame supporting a number of wheels, a seat mounted to the frame, and a first web securing the frame to the seat. A lap web may have one end secured a lap web anchorage mechanism that is attached to the seat and an opposite free end secured to a first lap web connector configured for releasable engagement with a second lap web connector. A frame anchorage mechanism may be secured to the frame. The first web may be secured between the lap web anchorage mechanism and the frame anchorage mechanism.
The system may further include releasable connectors attached to opposite ends of the first web and configured for releasable connection with each other. The system may further include a web length adjusting device for removing slack from, and introducing slack to, the first web. The first web may be looped around the lab web anchorage mechanism and the frame anchorage mechanism. The releasable connectors may be thereafter connected to each other to secure the lap web anchorage mechanism to the frame anchorage mechanism.
The system may further include a lap web having one end secured a lap web anchorage mechanism that is attached to the seat and an opposite free end secured to a first lap web connector configured for releasable engagement with a second lap web connector. A web retractor may be secured to the frame. One end of the first web may be attached to the web retractor. A second end of the first web may be secured to the lap web anchorage mechanism. The system may further include releasable connectors interposed on the first web between the retractor and the lap web anchorage mechanism. The releasable connectors may be configured for releasable engagement with each other.
The system may further include a second web securing the frame to the seat.
The frame anchorage mechanism may be a docking structure configured for engagement with a receiving structure mounted to a support surface. Alternatively, the frame anchorage mechanism may include a frame anchorage connector mounted to the wheelchair frame, and a second tether having one end connected to the frame anchorage connector and an opposite end anchored to a support surface.
A support surface may include a first support surface anchor point secured to the frame anchorage mechanism and a second support surface anchorage point. The first tether may be secured between the lap belt anchorage point and the second support surface anchorage point.
A wheelchair occupant restraint system may comprise a wheelchair having a frame supporting a number of wheels, a seat mounted to the frame, a back mounted to the frame, wherein the seat and back are configured to cooperatively support an occupant of the wheelchair, a shoulder belt support mounted to the back, and a web securing the shoulder belt support to a support surface remote from the wheelchair. The support surface may be a wall of a motor vehicle.
The system may further include a first web connector mounted to the shoulder belt support, and a second connector mounted to the support surface. One end of the web may be configured for releasable engagement with the first web connector. An opposite end of the web may be configured for engagement with the second tether connector. The second web connector may include a retractor mounted to the support surface. The opposite end of the web may be connected to the retractor with the one end of the web extending from the retractor.
The first web connector may be mounted to a rearwardly facing surface of the shoulder belt support mechanism so that the web restrains motion of the wheelchair back in a forward direction. Alternatively, the first web connector may be mounted to a forwardly facing surface of the shoulder belt support mechanism so that the web restrains motion of the wheelchair back in a rearward direction.
A wheelchair occupant restraint system may comprise a wheelchair having a frame supporting a number of wheels, a seat mounted to the frame, a back mounted to the frame, wherein the seat and back are configured to cooperatively support a wheelchair occupant, and a restraint assembly. The restraint assembly may include a shoulder web having one end extendable downwardly across the back toward the seat, a first connecting web having one end configured to be attached to the seat and another end configured for releasable engagement with the one end of the shoulder web, a lap web having one end extendable over the seat and a second connecting web having one end configured to be attached to the seat and another end configured for releasable engagement with the one end of the lab web. The shoulder web and the first connecting web and/or the lap web and the second connecting web may include at least one indicator identifying that the shoulder web connects to the first connecting web and the lap web connects to the second connecting web.
The at least one indicator may include portions of the shoulder web and first connecting web or the lap web and second connecting web having web widths that are sized to indicate connection therebetween. Alternatively or additionally, the at least one indicator may include labels attached to portions of the shoulder web and first connecting web or the lap web and second connecting web, wherein the labels configured to indicate connection between the corresponding webs. Alternatively or additionally, the at least one indicator may include providing the shoulder web and first connecting web or the lap web and second connecting web with matching colors.
These and other features of the present invention will become more apparent from the following description of the illustrative embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to a number of illustrative embodiments illustrated in the drawings and specific language will be used to describe the same.
Referring to
The wheelchair occupant restraint system 10 includes a conventional lap restraint belt or web 26 that is, in the embodiment illustrated in
The wheelchair occupant restraint system 10 further includes at least one auxiliary web or tether 30 extending between the docking structure 22 and the lap web 26. In the embodiment illustrated in
Referring now to
The auxiliary web 30 may be a single length of web as illustrated in
Referring now to
The opposite end 30A of the auxiliary web 30 is affixed to the anchorage member 28B. Alternatively, the web anchorage 28 may be as illustrated in
The auxiliary web 30 may be a single length of web as illustrated in
Referring now to
Another loop, ring or other attachment structure 28C is provided in the form of a web anchorage, and is attached to the frame 14 adjacent to the attachment structure 40. One end of the auxiliary web 30 is affixed to the web anchorage 28C in a conventional manner, and the opposite end is affixed to the web anchorage 28B as described hereinabove. Alternatively, the web anchorage 28C may be omitted, and the one end of the auxiliary web 30 may be attached directly to the attachment structure 40. Alternatively still, the web anchorage 28 may be as illustrated in
The auxiliary web 30 may be a single length of web as illustrated in
Referring now to
A web length adjuster 46 is attached to one end 39B of a web or tether 39 having an opposite end 39A attached to a conventional buckle 32A. One end of another web or tether 38 is attached to a conventional tongue 32B, and the opposite end of the tether 38 is attached to the web anchor 28B. Alternatively, the opposite end of the web 38 may be attached to the web anchor 28A. Alternatively still, the web anchor 28A, 28B may be as illustrated in
Referring now to
In any case, the seating system of the wheelchair 12 of
In the embodiment illustrated in
In the illustrated embodiment, a wall 64 extends upwardly from the support surface 24 behind the wheelchair, and may represent a wall or frame of a motor vehicle. The wheelchair restraint system 10′″ further includes a wheelchair back restraint mechanism 60 including a web or tether connector 62 securely mounted to the wall 64 and connected via web or tether 66 to a rear surface of the shoulder belt support mechanism 52. In the illustrated embodiment, the web or tether connector 62 is a locking retractor mounted to the wall 64 near its base, and may alternatively be mounted to the support structure 24 near the base of the wall 64. A ring or other pass-through structure 63 is mounted to the wall 64 above the retractor 62. One end of the web or tether 66 is attached to the retractor 62, and its opposite end passes through the ring or other pass-through structure 63 and is attached to a releasable connector 68B such as a conventional tongue. Another releasable connector 68A is mounted to or integral with the shoulder belt support mechanism 52.
In the illustrated embodiment, the releasable connector 68A is a conventional buckle and the releasable connector 68B is a conventional tongue. The buckle 68A and tongue 68B are configured to releasably engage each other in a conventional manner. Alternatively, the buckle 68A and tongue 64B may be reversed from the configuration shown in
Referring now to
With some conventional wheelchairs including an integral shoulder restraint belt 50, such as the wheelchair 12 illustrated in
In embodiments of the wheelchair occupant restraint assembly that include both a lap restraint belt 26 and a shoulder restraint belt 50 that each have a releasable connector attached to a free end thereof, it may be desirable to provide one or more visual indicators identifying which of the shoulder restraint belt 50 and lap restraint belt 26 connect to each of corresponding mating releasable connectors. Such visual indicators may be particularly helpful when either of the shoulder web 50 or the lap web 26 does not form part of the occupant restraint harness mounted to the wheelchair 12.
In one embodiment, for example, the widths of the lap restraint web 26 and of the corresponding connecting web 26′ adjacent to their corresponding connecting ends are sized to indicate that these respective ends are configured for releasable connection with each other. Likewise, the widths of the shoulder restraint web 50 and of the corresponding connecting web 50′ adjacent to their corresponding connecting ends are sized to indicate that these respective ends are configured for releasable connection with each other. As illustrated by example in
In another embodiment, for example, the lap restraint web 26 and the corresponding connecting web 26′, and/or the shoulder restraint web 50 and the corresponding connector web 50′ may alternatively or additionally include an identifying label attached adjacent to their corresponding connecting ends as illustrated by example in
Alternatively or additionally, the lap restraint webs 26 and 26′ and/or the shoulder restraint webs 50 and 50′ may each be color coded in a manner that indicates that the respective connections. As illustrated in
While the invention has been illustrated and described in detail in the foregoing drawings and description, the same is to be considered as illustrative and not restrictive in character, it being understood that only illustrative embodiments thereof have been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected.
Claims
1. A wheelchair occupant restraint system comprising:
- a wheelchair having a frame supporting a number of wheels,
- a seat mounted to the frame, and
- a first web securing the frame to the seat.
2. The wheelchair occupant restraint system of claim 1 further including:
- a lap web having one end secured a lap web anchorage mechanism that is attached to the seat and an opposite free end secured to a first lap web connector configured for releasable engagement with a second lap web connector, and
- a frame anchorage mechanism secured to the frame,
- wherein the first web is secured between the lap web anchorage mechanism and the frame anchorage mechanism.
3. The wheelchair occupant restraint system of claim 2 further including releasable connectors attached to opposite ends of the first web and configured for releasable connection with each other.
4. The wheelchair occupant restraint system of claim 3 further including a web length adjusting device for removing slack from, and introducing slack to, the first web.
5. The wheelchair occupant restraint system of claim 3 wherein the first web is looped around the lab web anchorage mechanism and the frame anchorage mechanism, the releasable connectors thereafter connected to each other to secure the lap web anchorage mechanism to the frame anchorage mechanism.
6. The wheelchair occupant restraint system of claim 5 further including a web length adjusting device for removing slack from, and introducing slack to, the first web.
7. The wheelchair occupant restraint system of claim 1 further including:
- a lap web having one end secured a lap web anchorage mechanism that is attached to the seat and an opposite free end secured to a first lap web connector configured for releasable engagement with a second lap web connector, and
- a web retractor secured to the frame and having one end of the first web attached thereto,
- wherein a second end of the first web is secured to the lap web anchorage mechanism.
8. The wheelchair occupant restraint system of claim 7 further including releasable connectors interposed on the first web between the retractor and the lap web anchorage mechanism, the releasable connectors configured for releasable engagement with each other.
9. The wheelchair occupant restraint system of claim 1 further including a second web securing the frame to the seat.
10. The wheelchair occupant restraint system of claim 2 wherein the frame anchorage mechanism is a docking structure configured for engagement with a receiving structure mounted to a support surface.
11. The wheelchair occupant restraint system of claim 2 wherein the frame anchorage mechanism includes:
- a frame anchorage connector mounted to the wheelchair frame, and
- a second tether having one end connected to the frame anchorage connector and an opposite end anchored to a support surface.
12. The wheelchair occupant restraint system of claim 2 wherein a support surface includes a first support surface anchor point secured to the frame anchorage mechanism and a second support surface anchorage point,
- and wherein the first tether is secured between the lap belt anchorage point and the second support surface anchorage point.
13. A wheelchair occupant restraint system comprising:
- a wheelchair having a frame supporting a number of wheels,
- a seat mounted to the frame,
- a back mounted to the frame, the seat and back configured to cooperatively support an occupant of the wheelchair,
- a shoulder belt support mounted to the back, and
- a web securing the shoulder belt support to a support surface remote from the wheelchair.
14. The wheelchair occupant restraint system of claim 13 further including:
- a first web connector mounted to the shoulder belt support, and
- a second connector mounted to the support surface,
- wherein one end of the web is configured for releasable engagement with the first web connector, and an opposite end of the web is configured for engagement with the second tether connector.
15. The wheelchair occupant restraint system of claim 13 wherein the second web connector includes a retractor mounted to the support surface,
- and wherein the opposite end of the web is connected to the retractor, the one end of the web extending from the retractor.
16. The wheelchair occupant restraint system of claim 13 wherein the first web connector is mounted to a rearwardly facing surface of the shoulder belt support mechanism so that the web restrains motion of the wheelchair back in a forward direction.
17. The wheelchair occupant restraint system of claim 13 wherein the first web connector is mounted to a forwardly facing surface of the shoulder belt support mechanism so that the web restrains motion of the wheelchair back in a rearward direction.
18. The wheelchair occupant restraint system of claim 13 wherein the support surface is a wall of a motor vehicle.
19. A wheelchair occupant restraint system, comprising:
- a wheelchair having a frame supporting a number of wheels,
- a seat mounted to the frame,
- a back mounted to the frame, the seat and back configured to cooperatively support a wheelchair occupant, and
- a restraint assembly including a shoulder web having one end extendable downwardly across the back toward the seat, a first connecting web having one end configured to be attached to the seat and another end configured for releasable engagement with the one end of the shoulder web, a lap web having one end extendable over the seat and a second connecting web having one end configured to be attached to the seat and another end configured for releasable engagement with the one end of the lab web, at least one of the should web and first connecting web and the lap web and second connecting web including at least one indicator identifying that the shoulder web connects to the first connecting web and the lap web connects to the second connecting web.
20. The wheelchair occupant restraint system of claim 19 wherein the at least one indicator includes portions of the shoulder web and first connecting web or the lap web and second connecting web having web widths that are sized to indicate connection therebetween.
21. The wheelchair occupant restraint system of claim 19 wherein the at least one indicator includes labels attached to portions of the shoulder web and first connecting web or the lap web and second connecting web, the labels configured to indicate connection between the corresponding webs.
22. The wheelchair occupant restraint system of claim 19 wherein the at least one indicator includes providing the shoulder web and first connecting web or the lap web and second connecting web with matching colors.
Type: Application
Filed: Mar 8, 2005
Publication Date: Sep 29, 2005
Inventor: Aaron Acton (Whitestown, IN)
Application Number: 11/074,564