Motorized transfer and transport system for the disabled

• US 5,193,633 A
• Filed: 06/07/1991
• Issued: 03/16/1993
• Est. Priority Date: 06/07/1991
• Status: Expired due to Fees

• Current Assignee: Wright State University
• Original Assignee: Wright State University
• Inventors: Ezenwa, Bertram N.
• Primary Examiner(s): Culbreth, Eric D.
• Application Number:
  US07/712,266
• Time in Patent Office: 648 Days
• Field of Search: 180/65.1, 180/271, 180/907, 280/250.1, 280/30, 297/DIG. 4, 414/921, 414/495, 414/663, 414/672, 296/65.1, 248/419, 248/425, 248/161, 248/404, 5/611, 5/616, 5/613, 5/617, 5/618, 5/86.1, 5/81.1
• US Class Current: 180/65.1
• CPC Class Codes: A61G 5/006 convertible to stretchers or beds
• CPC Class Codes: A61G 5/045 Rear wheel drive
• CPC Class Codes: A61G 5/1059 adjusting the height of the seat
• CPC Class Codes: A61G 5/1072 rotating the whole seat around a vertical axis
• CPC Class Codes: A61G 7/1019 Vertical extending columns or mechanisms
• CPC Class Codes: A61G 7/1034 Rollers, rails or other means
• CPC Class Codes: A61G 7/1057 Supported platforms, frames or sheets for patient in lying position
• CPC Class Codes: A61G 7/1076 Means for rotating around a vertical axis
• CPC Class Codes: Y10S 180/907 Motorized wheelchairs

Abstract

A powered transfer and transport system is provided to permit disabled individuals increased mobility and freedom of movement. The powered system performs as a wheelchair in one configuration and as a bed in another, and provides powered mechanisms for variously positioning the seating surface which are operable by the occupant from the seating surface. The powered system includes mechanisms for laterally shifting, elevating, rotating, reclining and driving the seating surface. Enhanced mobility and freedom of movement for the individual results, improving the capability for independent living and expanding employment opportunities.

Claims

1. A powered transfer and transport system for the disabled, said powered system comprising:

a wheeled frame;

a power source comprising one or more rechargeable batteries disposed on said wheeled frame;

a seating surface comprising one or more panels supported by said wheeled frame;

one or more arms disposed on at least one side of said seating surface;

powered means for laterally shifting said seating surface, said powered means for laterally shifting disposed on said wheeled frame and connected to said power source;

powered means for elevating said seating surface, said powered means for elevating disposed on said frame and connected to said power source;

powered means for rotating said seating surface, said powered means for rotating disposed on said means for elevating and connected to said power source;

control means for operating said powered means for laterally shifting, said powered means for elevating, and said powered means for rotating, said control means disposed on said frame and operable from said seating surface; and

means for recharging said rechargeable batteries, said means for recharging operable from said seating surface.

2. A powered system as recited in claim 1, further comprising powered means for driving said wheeled frame;

and wherein said control means for operating is further adapted to operate said powered means for driving.

3. A powered system as recited in claim 2 wherein said wheeled frame comprises:

a frame structure of light weight material having three or more wheels rotatably mounted thereon; and

one or more of said wheels is rotatably driven by said powered means for driving.

4. A powered system as recited in claim 2 wherein said powered means for driving said wheeled frame comprises one or more drive motors.

5. A powered system as recited in claim 2 wherein said control means comprises:

a control circuit which may be switched between a transport position, and a transfer position;

wherein said transport position activates only said powered means for driving said wheeled frame; and

wherein said transfer position activates only said powered means for laterally shifting, said powered means for elevating, and said powered means for rotating.

6. A powered system as recited in claim 5 wherein said control means further comprises:

a chair shifting interlock comprising a first interlock switch having a first, closed position when said chair is substantially centered on said wheeled frame, and a second, open position when said chair is substantially off-center on said wheeled frame;

a chair elevation interlock comprising a second interlock switch having a first, closed position when said chair is substantially lowered on said wheeled frame, and a second, open position when said chair is substantially raised on said wheeled frame; and

a chair rotation interlock comprising a third interlock switch having a first, closed position when said chair faces substantially forward, and a second, open position when said chair is substantially rotated from facing forward;

said first, second and third interlock switches connected in said control circuit to disconnect said powered means for driving said wheeled frame from said power source, where said control circuit is switched to said transport position, and where one or more of said first, second and third interlock switches is in a second, open position.

7. A powered system as recited in claim 1, further comprising powered means for reclining at least portions of said seating surface;

and wherein said control means for operating is further adapted to operate said powered means for reclining.

8. A powered system as recited in claim 7 wherein:

said seating surface comprises a seat panel, a back panel rotatably connected to a first edge of said back panel, and a leg panel rotatably connected to a second edge of said back panel; and

said powered means for reclining comprises means for changing the attitude of at least one of said back panel and said leg panel, said means for changing the attitude including one or more seating surface drive motors attached to at least one of said back panel and said leg panel, said back panel and said leg panel adjustable to positions varying between a chair configuration and a bed configuration.

9. A powered system as recited in claim 1 wherein said powered means for laterally shifting comprises

one or more rails disposed on and extending generally laterally across said wheeled frame;

one or more guides slidably disposed on said one, or more rails and attached to said means for elevating said seating surface; and

means for driving said one or more guides along said one or more rails;

whereby said seating surface may be adjusted laterally towards either edge of said wheeled frame by an occupant thereof.

10. A powered system as recited in claim 1 wherein said powered means for laterally shifting shifts said seating surface laterally in one or more directions along an arcuate path.

11. A powered system as recited in claim 1 wherein said powered means for elevating comprises:

a telescoping pillar having a first end attached to said powered means for laterally shifting, and having a second end, extendable in a generally vertical direction and attached to one or more panels of said seating surface; and

means for driving said telescoping pillar to extend and retract said second end;

whereby said seating surface may be raised and lowered by an occupant thereof.

12. A powered system as recited in claim 1 wherein said powered means for rotating rotates said seating surface at least substantially 360 degrees from a first end of a rotational arc to second end of said rotational arc, said powered means for rotating disposed on said powered means for elevating and attached to said seating surface.

13. A powered system as recited in claim 10 wherein said powered means for rotating comprises:

a first gear, rotatably mounted about a generally vertical axis on said powered means for elevating, said first gear further attached to one or more panels of said seating surface; and

drive means for rotatably driving said first gear about said generally vertical axis.

14. A powered system as recited in claim 1 wherein said power source comprises one or more rechargeable batteries.

15. A powered system as recited in claim 1 further comprising one or more arms disposed on at least one side of said seating surface;

said one or more arms being foldable to a first position for use and a second position for storage;

at least one of said one or more arms attached to said control means for operating said powered means for laterally shifting, said powered means for elevating and said powered means for rotating.

16. A powered system as recited in claim 1 further comprising one or more limit switches connected to said power source to limit the travel of said seating surface in at least one direction of motion.

17. A powered system as recited in claim 1 wherein said wheeled frame comprises a frame structure of light weight material having three or more wheels rotatably mounted thereon.

18. A powered system as recited in claim 1 wherein said means for recharging is operable from at least one of said one or more arms.

19. A powered transfer and transport system for the disabled, said powered system comprising:

a wheeled frame;

a power source disposed on said wheeled frame;

a seating surface comprising one or more panels supported by said wheeled frame;

powered means for laterally shifting said seating surface, said powered means for laterally shifting disposed on said wheeled frame and connected to said power source, wherein;

said powered means for laterally shifting shifts said seating surface laterally in one or more directions along an arcuate path; and

said powered means for laterally shifting includes;

one or more rails disposed on and extending generally laterally across said wheeled frame, said one or more rails having an arcuate shape disposed in a generally vertical plane;

one or more guides slidably disposed on said one or more rails and attached to means for elevating said seating surface; and

means for driving said one or more guides along said one or more rails, such that said seating surface may be adjusted laterally along an arcuate path by an occupant thereof;

powered means for elevating said seating surface, said powered means for elevating disposed on said frame and connected to said power source;

powered means for rotating said seating surface, said powered means for rotating disposed on said means for elevating and connected to said power source; and

control means for operating said powered means for laterally shifting, said powered means for elevating, and said powered means for rotating, said control means disposed on said frame and operable from said seating surface.

20. A powered transfer and transport system for the disabled, said powered system comprising:

a wheeled frame;

a powered source disposed on said wheeled frame comprising one or more rechargeable batteries;

a seating surface comprising one or more panels supported by said wheeled frame;

one or more arms disposed on at least one side of said seating surface;

powered means for laterally shifting said seating surface, said powered means for laterally shifting disposed on said wheeled frame and connected to said power source;

powered means for elevating said seating surface, said powered means for elevating disposed on said frame and connected to said power source;

powered means for rotating said seating surface, said powered means for rotating disposed on said frame and connected to said power source;

control means for operating said powered means for laterally shifting, said powered means for elevating, and said powered means for rotating, said control means disposed on said frame and operable from said seating surface; and

means for recharging said rechargeable batteries, said means for recharging operable from at least one of said one or more arms.

21. A powered transfer and transport system for the disabled, said powered system comprising:

a wheeled frame;

a power source disposed on said wheeled frame;

a seating surface comprising one or more panels supported by said wheeled frame;

powered means for laterally shifting said seating surface, said powered means for laterally shifting disposed on said wheeled frame and connected to said power source;

powered means for elevating said seating surface, said powered means for elevating disposed on said frame and connected to said power source;

powered means for rotating said seating surface, said powered means for elevation disposed on said frame and connected to said power source;

control means for operating said powered means for laterally shifting, said powered means for elevating, and said powered means for rotating, said control means disposed on said frame and operable from said seating surface,

one or more limit switches connected to said power source to limit the travel of said seating surface in at least one direction of motion, wherein said one or more limit switches include;

left and right chair shifting limit switches positioned on said frame to contact said powered means for laterally shifting at opposing lateral edges of said wheeled frame;

raised and lowered chair elevation limit switches positioned to contact said powered means for elevating when said powered means for elevating is extended to its maximum length, and retracted to its shortest length; and

clockwise and counterclockwise chair rotation limit switches positioned on said frame to contact said means for rotating when said means for rotating has rotated substantially 180 degrees from a forward facing position in either a clockwise direction or counterclockwise position, respectively, as viewed from above.

22. A powered transfer and transport system for the disabled, said powered system comprising:

a wheeled frame;

a power source disposed on said wheeled frame;

a seating surface comprising one or more panels supported by said wheeled frame;

powered means for laterally shifting said seating surface on said wheeled frame connected to said power source, said powered means for laterally shifting operable to shift said seating surface laterally in one or more directions along an arcuate path which extends in a generally vertical direction from said wheeled frame; and

control means for operating said powered means for laterally shifting from said seating surface.

23. A powered system as recited in claim 22 wherein said powered means for laterally shifting shifts said seating surface from approximately 0 inches to approximately 8 inches in at least one direction from a substantially central position on said wheeled frame.

24. A powered system as recited in claim 22 further comprising:

powered means for elevating said seating surface, said powered means for elevating disposed on said wheeled frame; and

control means for operating said powered means for elevating from said seating surface.

25. A powered system as recited in claim 24 wherein said powered means for elevating comprises:

a telescoping pillar having a first end attached to said powered means for laterally shifting, and having a second end, extendable in a vertical direction and attached to one or more panels of said seating surface; and

means for driving said telescoping pillar to extend and retract said second end;

whereby said seating surface may be raised and lowered by an occupant thereof.

26. A powered system as recited in claim 24 further comprising:

powered means for rotating said seating surface, said powered means for rotating disposed on said powered means for elevating and further attached to said seating surface; and

control means for operating said powered means for rotating from said seating surface.

27. A powered system as recited in claim 22 further comprising:

powered means for rotating said seating surface supported by said powered means for laterally shifting and further attached to said seating surface; and

control means for operating said powered means for rotating from said seating surface.

28. A powered system as recited in claim 27 wherein said powered means for rotating comprises:

a first gear, rotatably mounted about a generally vertical axis on said powered means for laterally shifting for rotation of at least substantially 360 degrees from a first end of a rotational arc to a second end of said rotational arc, said first gear attached to one or more panels of said seating surface; and

drive means for rotatably driving said first gear about said generally vertical axis;

whereby said seating surface may be rotated up to at least substantially 180 degrees from a central position by the occupant thereof.

29. A powered system as recited in claim 22 further comprising one or more limit switches connected to said power source to limit the travel of said seating surface in at least one direction of motion.

30. A powered system as recited in claim 22 wherein said power source comprises one or more rechargeable batteries, and said powered system further comprises means for recharging said rechargeable batteries operable from said seating surface.

31. A powered system as recited in claim 30 further comprising:

one or more arms disposed on at least one side of said seating surface; and

wherein said means for recharging is operable from at least one of said one or more arms.

32. A powered transfer and transport system for the disabled, said powered system comprising:

a wheeled frame;

a power source disposed on said wheeled frame;

a seating surface comprising one or more panels supported by said wheeled frame;

powered means for laterally shifting said seating surface on said wheeled frame connected to said power source, said powered means for laterally shifting operable to shift said seating surface laterally in one or more directions along an arcuate path, and said powered means for laterally shifting including;

one or more rails disposed on and extending generally laterally across said wheeled frame, said one or more rails having an arcuate shape disposed in a generally vertical plane;

one or more guides slidably disposed on said one or more rails and attached to one or more panels of said seating surface; and

means for driving said one or more guides along said one or more rails; and

control means for operating said powered means for laterally shifting from said seating surface;

whereby said seating surface may be adjusted laterally in either direction along an arcuate path by an occupant thereof.

33. A powered system as recited in claim 32 wherein said means for driving said one or more guides comprises a ball screw drive.

34. A powered transfer and transport system for the disabled, said powered system comprising:

a wheeled frame;

a power source disposed on said wheeled frame;

a seating surface comprising one or more panels supported by said wheeled frame;

powered means for laterally shifting said seating surface on said wheeled frame connected to said power source, said powered means for laterally shifting operable to shift said seating surface laterally in one or more directions along an arcuate path, where said arcuate path extends in a generally vertical plane and tilts said seating surface up to approximately 5 degrees from vertical at each end of said arcuate path; and

control means for operating said powered means for laterally shifting from said seating surface.