Wheelchair restraint system for a transportation vehicle

• US 20020114679A1
• Filed: 04/03/2002
• Published: 08/22/2002
• Est. Priority Date: 09/29/1997
• Status: Active Grant

• Current Assignee: American Seating Company
• Original Assignee: American Seating Company
• Inventors: Craft, Richard D.
• Granted Patent: US 6,575,677 B2
• Time in Patent Office: Days
• US Class Current: 410/7
• CPC Class Codes: A61G 3/0808 Accommodating or securing wheelchairs

Abstract

A wheelchair restraint system for a mass transportation vehicle having a securement area for a wheelchair is disclosed which includes a barrier carried at a rear portion of the securement area disposed generally transverse to the longitudinal vehicle axis. A rear wheelchair attachment assembly is carried by the rear barrier for anchoring the wheelchair to the barrier. A personal securement belt assembly secures a seated wheelchair occupant to the wheelchair in the securement area. A front bulkhead extends generally transverse to the longitudinal vehicle axis at a front portion of the securement area which includes an extendable anchor member which extends transverse relative to the longitudinal vehicle axis. The anchor member is extendable between a stored position in which the anchor member is stowed within the bulkhead and a deployed position wherein the anchor member is extended from the bulkhead. A front wheel chair attachment assembly includes two attachment belts extending from the wheel chair to a first anchor location on the bulkhead and to a second anchor location on the extendable anchor member when the anchor member is in the deployed position. The first and second front attachment belts diverge outwardly and incline downwardly from the wheelchair toward the respective first and second anchor locations on the bulkhead to effectively anchor the occupant and wheelchair and prevent lateral tipping.

Claims

1. A wheelchair restraint system for a mass transportation vehicle having a longitudinal vehicle axis, said vehicle having a securement area for a wheelchair which includes at least one flip seat, said system comprising:

a barrier carried at a rear portion of said securement area and disposed generally transverse to the longitudinal vehicle axis;

a rear wheelchair attachment assembly carried by said rear barrier for anchoring said wheelchair to said barrier;

said rear wheelchair attachment assembly having at least two rear attachment elements for attachment at two spaced locations to said wheelchair;

a personal securement belt assembly for securing a seated wheelchair occupant to said wheelchair in said securement area;

a front bulkhead extending generally transverse to the longitudinal vehicle axis at a front portion of said securement area;

a front wheelchair attachment assembly for anchoring said wheelchair to said bulkhead;

said front wheelchair attachment assembly having at least two front attachment elements for attachment to two spaced locations of said wheelchair and said bulkhead; and

said rear wheelchair attachment assembly including at least one retractor mechanism for exerting a force on said wheelchair in a first direction along said vehicle axis, and said front wheel attachment assembly including at least one retractor mechanism for exerting a force on said wheelchair in a second direction opposite to said first direction so that said wheelchair is secured between said barrier and bulkhead by said rear and front wheelchair attachment assemblies.

2. The system of claim 1 including a coupling having a rear connector, said first and second attachment elements of said rear wheelchair attachment assembly being affixed to said coupling, and said retracting mechanism of said rear wheelchair attachment assembly being connected to said rear connector of said coupling.

3. The system of claim 1 wherein said rear wheelchair retractor mechanism includes a rear retractable belt having a retracted and withdrawn configuration;

a release for releasing said belt from said retracted and withdrawn configurations; and

a crank for manually tightening said belt when tensioned in said withdrawn configuration.

4. The system of claim 3 wherein said attachment elements of said rear wheelchair attachment assembly include a first rear attachment belt for attachment to a first rear location of said wheelchair and a second rear belt for attachment to a second rear location of said wheelchair spaced from said first location, and a coupling for coupling said first and second belts to said rear retractable belt.

5. The system of claim 4 wherein said coupling comprises a plate having a center attachment for attachment to said rear retracting belt, and said first and second rear attachment belts being affixed to said plate at locations spaced equal distances from said center attachment.

6. The system of claim 1 wherein said front wheel attachment assembly comprising a first front attachment belt for attachment to a first front location of said wheelchair, a second front attachment belt for attachment to a second front location of said wheelchair spaced from said first front location, a first and a second retractor mechanisms for retracting said respective first and second belts in a direction to place a tensioning force on said first and second front belts, and said retractor mechanisms including a manual crank for tightening tensioned first and second belts.

7. The system of claim 6 wherein at least one of said first and second rear attachment belts defines an anchor line extending from a respective one of said first and second wheelchair locations toward a respective one of said anchor locations on said bulkhead at a horizontal angle with respect to the vehicle axis to effectively prevent lateral tipping.

8. The system of claim 7 wherein said first and second front attachment belts are inclined downward from said wheelchair to said front bulkhead.

9. The system of claim 7 wherein said anchor line of said first attachment belt extends at an angle in a range of 0 to ±

15 degrees and said anchor line of said second attachment diverges toward said bulkhead at an angle in a range of about 0 to 15 degrees.

10. The system of claim 7 wherein said anchor line of said first attachment belt diverges outwardly at an angle of about 5 degrees with respect to the vehicle longitudinal axis, and said anchor line of said second attachment belt diverges at an angle of about 5 degrees.

11. The system of claim 6 wherein said front anchor bulkhead includes an extendable anchor member which extends transverse relative to the longitudinal vehicle axis, said anchor member being extendable between a stored position in which said anchor member is stowed with said bulkhead and a deployed position wherein said anchor member is extended from said bulkhead, said first retractor mechanism carried by said extendable anchor member, and said second retractor mechanism carried by said bulkhead.

12. The system of claim 10 wherein said bulkhead comprises a bulkhead housing, and said anchor member being placed within said bulkhead housing in said stored position.

13. The system of claim 12 wherein said bulkhead housing includes an opening, said extendable anchor member being movable through said opening when moving between said stored and extended positions.

14. The system of claim 13 including a movable closure for closing said opening of said bulkhead, said closure having an open and closed position, and said closure forming a track for guiding movement of said anchor member between said stored and extended positions.

15. The system of claim 1 wherein said personal securement strap assembly comprises a lap belt affixed near said rear barrier, and a shoulder belt attachable to said lap belt.

16. The system of claim 15 including an adjustable ring tether for supporting said shoulder belt, said ring tether being adjustable to adjust an upper position of said shoulder belt in a vertical direction to accommodate wheelchair occupants of different heights.

18. The system of claim 17 including a coupling having a rear connector, said rear wheelchair assembly including first and second attachment elements affixed to said coupling for attachment to said wheelchair, and said retracting mechanism of said rear wheelchair attachment assembly being connected to said rear connector of said coupling.

19. The system of claim 17 wherein said front wheel attachment assembly comprises a first front attachment belt for attachment to said first anchor location, a second front attachment belt for attachment to said second anchor location of said wheelchair spaced from said first anchor location, wherein at least one of said first and second rear attachment belts diverge outwardly from said respective first and second wheelchair locations toward said anchor locations on said bulkhead to effectively prevent lateral tipping.

20. The system of claim 19 wherein said first and second front attachment belts are inclined downward from said wheelchair to said front bulkhead.

21. The system of claim 19 wherein said first attachment belt extends at an angle in a range of 0 to ±

15 degrees and said second attachment belt diverges toward said bulkhead at an angle in a range of about 0 to 15 degrees.

22. The system of claim 19 wherein said first attachment belt diverges outwardly at an angle of about 5 degrees with respect to the vehicle longitudinal axis, and said second attachment belt diverges at an angle of about 5 degrees.

23. The system of claim 19 wherein said front bulkhead includes an extendable anchor member which extends transverse relative to the longitudinal vehicle axis, said anchor member being extendable between a stored position in which said anchor member is stowed with said bulkhead and a deployed position wherein said anchor member is extended from said bulkhead, and a first retractor mechanism carried by said extendable anchor member, and a second retractor mechanism carried by said bulkhead.

25. The system of claim 24 wherein said bulkhead comprises a bulkhead housing, and said anchor member being placed within said bulkhead housing in said stored position.

26. The system of claim 25 wherein said bulkhead housing includes an opening, said extendable anchor member being movable through said opening when moving between said stored and extended positions.

27. The system of claim 26 including a movable closure for closing said opening of said bulkhead, said closure having an open and closed position, and said closure forming a track for guiding movement of said anchor member between said stored and extended positions.

28. The system of claim 24 wherein said front wheelchair attachment assembly includes a first and second front attachment belts which diverge outwardly from said wheelchair to said respective first and second anchor locations on said bulkhead to effectively prevent lateral tipping.

29. The system of claim 28 wherein said first and second front attachment belts are inclined downward from said wheelchair to said front bulkhead.

17. A wheelchair restraint system for a mass transportation vehicle having a longitudinal vehicle axis, said vehicle having a securement area for a wheelchair which includes at least one flip seat, said system comprising:

a barrier carried at a rear portion of said securement area and disposed generally transverse to the longitudinal vehicle axis;

a rear wheelchair attachment assembly carried by said rear barrier for attachment to said wheelchair and anchoring said wheelchair to said barrier at a first rear anchor location;

a personal securement belt assembly for securing a seated wheelchair occupant to said wheelchair in said securement area;

a front bulkhead extending generally transverse to the longitudinal vehicle axis at a front portion of said securement area;

a front wheelchair attachment assembly for anchoring said wheelchair to a first and second spaced front anchor location on said bulkhead; and

said rear wheelchair attachment assembly including at least one retractor mechanism for exerting an adjustable force on said wheelchair in a first direction along said vehicle axis; and

said front wheel attachment assembly including at least one retractor mechanism for exerting an adjustable force on said wheelchair in a second direction opposite to said first direction so that said wheelchair is secured by said first rear anchor location and said first and second front anchor locations between said barrier and bulkhead by said rear and front wheelchair attachment assemblies in an effective three anchor point restraint system.

24. A wheelchair restraint system for a mass transportation vehicle having a longitudinal vehicle axis, said vehicle having a securement area for a wheelchair which includes at least one flip seat, said system comprising:

a barrier carried at a rear portion of said securement area and disposed generally transverse to the longitudinal vehicle axis;

a rear wheelchair attachment assembly carried by said rear barrier for anchoring said wheelchair to said barrier;

a personal securement belt assembly for securing a seated wheelchair occupant to said wheelchair in said securement area;

a front bulkhead extending generally transverse to the longitudinal vehicle axis at a front portion of said securement area;

a front wheelchair attachment assembly for anchoring said wheelchair to said bulkhead;

said front bulkhead including an extendable anchor member which extends transverse relative to the longitudinal vehicle axis, said anchor member being extendable between a stored position in which said anchor member is stowed in a non-operating position and a deployed position wherein said anchor member is extended from said bulkhead; and

said from wheel chair attachment assembly securing said wheel chair to a first anchor location on said bulkhead and to a second anchor location on said extendable anchor member when said anchor member is in said deployed position.