Walker chair

• US 6,338,493 B1
• Filed: 04/19/2000
• Issued: 01/15/2002
• Est. Priority Date: 04/19/2000
• Status: Expired due to Fees

• Current Assignee: Joseph Weil, Louis Weil
• Original Assignee: Joseph Weil, Louis Weil
• Inventors: De Winter, Koen, Wohlgemuth, Eli
• Primary Examiner(s): Swann, J. J.
• Assistant Examiner(s): SHRIVER II, JAMES A
• Application Number:
  US09/552,538
• Time in Patent Office: 636 Days
• Field of Search: 280/30, 280/87.021, 280/87.041, 280/87.05, 280/649, 280/650, 280/639, 280/42, 280/647, 280/648, 280/250.1, 280/87.01, 280/87.051, 280/47.4, 280/1.5, 280/200, 280/304.1, 135/65, 135/66, 135/67, 135/74, 135/75, 135/77, 297/5-7, 297/DIG.4, 297/485, 482/65-69
• US Class Current: 280/30
• CPC Class Codes: A61G 5/00 Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs chairs with toilet conveniences A47K11/04; devices enabling patients or disabled persons to operate an apparatus or device not forming part of the body A61F4/00; running gear or propulsion features B60K; bicycles specially adapted for disabled riders B62K3/16 ; Invalid chairs having removable seats specially adapted to be transferred with the invalid to a vehicle and support the invalid during use of the vehicle A61G3/02
• CPC Class Codes: A61H 2003/046 with braking means
• CPC Class Codes: A61H 2201/1633 Seat A61H2201/0149 takes precedence
• CPC Class Codes: A61H 3/04 Wheeled walking aids for patients or disabled persons
• CPC Class Codes: Y10S 297/04 Wheelchair

Abstract

An apparatus that is convertible between walker and a wheelchair has one pair of wheels that are continually engaged with the ground and a second pair of wheels that are movable from a first position out of engagement or disengaged with the ground, in which the apparatus is used as a walker, to a second position into engagement with the ground, in which the apparatus is used as a wheelchair. The movable wheels are controllable by the operator through the use of handle members connected such wheels. The handle members rotate the wheels into and out of engagement with the ground along a path that is at an angle from the vertical, thereby assuring disengagement of the wheels from the ground.

Claims

1. An apparatus convertible between a walker and a wheelchair for use on the ground comprising:

a) a frame having a first side, a second side and a backrest extending therebetween, each side having a front leg and a rear leg,

b) said front legs having a pair of front wheels respectively associated therewith and said rear legs having a pair of rear wheels respectively associated therewith,

c) a seat pivotally connected to said frame and movable between a first position during which the apparatus is used as a wheelchair to a second position during which the apparatus is used as a walker, and

d) a converting mechanism associated with one of said pair of wheels, wherein said one of said pair of wheels is movable with the use of said converting mechanism between a first position, where said wheels engage the ground in which the apparatus is used as a wheelchair, to a second position where said wheels are disengaged from the ground in which the apparatus is used as a walker,

e) wherein said converting mechanism further comprises means for respectively rotating said one of said pair of movable wheels about their respective legs between said first and second positions.

2. An apparatus in accordance with claim 1, wherein said converting mechanism further comprises a pair of handle members for respectively moving said each of said pair of wheels about their respective legs between said first and second positions.

3. An apparatus in accordance with claim 1, wherein said converting mechanism further comprises a pair of handle members for respectively rotating said each of said pair of movable wheels about their respective legs between said first and second positions.

4. An apparatus in accordance with claim 1, wherein the other of said pair of wheels is adapted for continuous engagement with the ground.

5. An apparatus in accordance with claim 1, wherein said legs associated with said movable wheels further comprise non-rotating feet adapted to engage the ground when the movable wheels are disengaged from the ground.

6. An apparatus in accordance with claim 5, further comprising handle members coupled to said legs associated with said movable wheels.

7. An apparatus in accordance with claim 6, further comprising sleeve members for coupling said handle members with said legs associated with said movable wheels.

8. An apparatus in accordance with claim 1, wherein said legs associated with said movable wheels are oriented at an angle from the vertical.

9. An apparatus in accordance with claim 1, wherein said second position of said movable wheels is located nearer to said backrest than said first position of said movable wheels.

10. An apparatus in accordance with claim 1, wherein said apparatus is collapsible.

11. An apparatus in accordance with claim 10, wherein said first and second sides are movable from a first position substantially perpendicular to said backrest to a second position substantially parallel to said backrest.

12. An apparatus in accordance with claim 1, wherein said frame further comprises a handlebar positioned above said backrest and extending away from said seat.

13. An apparatus convertible between a walker and a wheelchair for use on the ground comprising:

a) frame having a first side, a second side and a backrest extending therebetween, each side having a front leg and a rear leg,

b) said front legs having a pair of front wheels respectively associated therewith and said rear legs having a pair of rear wheels respectively associated therewith, and

c) a seat pivotally connected to said frame,

d) wherein one of said pair of wheels is adapted for continuous engagement with the ground and the other of said pair of wheels is adapted for selective engagement with the ground,

e) wherein said pair of wheels adapted for selective engagement with the ground is rotatable around its respective legs between a first position, where said wheels are disengaged from the ground and said apparatus is used as a walker, to a second position where said wheels engage the ground and said apparatus is used as a wheelchair.

14. An apparatus in accordance with claim 13, wherein said pair of wheels that are adapted for selective engagement with the ground are rotatably coupled to said legs associated with said wheels.

15. An apparatus in accordance with claim 14, wherein said pair of wheels that are adapted for continuous engagement with the ground are disposed at the ends of said legs associated with said wheels.

16. An apparatus in accordance with claim 14, further comprising sleeve members for coupling said pair of wheels that are adapted for selective engagement with the ground with said legs associated therewith.

17. An apparatus in accordance with claim 13, further comprising a converting mechanism for moving said pair of wheels adapted for selective engagement with the ground between a first position, where said wheels are disengaged from the ground and said apparatus is used as a walker, to a second position where said wheels engage the ground and said apparatus is used as a wheelchair.

18. An apparatus in accordance with claim 16, further comprising handle members coupled to said legs associated with said pair of wheels adapted for selective engagement with the ground for moving said pair of wheels into and out of engagement with the ground.

19. An apparatus in accordance with claim 18, wherein said handle members further comprise an upper portion having a handgrip and a lower portion connected to said wheels.

20. An apparatus in accordance with claim 19, wherein said upper portion and said lower portion of said handle members are arranged at different angular orientations.

21. An apparatus in accordance with claim 13, wherein said legs associated with said wheels that are adapted for selective engagement with the ground are oriented at an angle from the vertical.

22. An apparatus convertible between a walker and a wheelchair for use on the ground comprising:

a) a frame having a seat, a first side, a second side and a backrest extending between said first and second sides, each side having a front leg and a rear leg,

b) said front legs and rear legs respectively having a pair of front wheels and a pair of rear wheels associated therewith,

c) wherein said pair of rear wheels is adapted for continuous engagement with the ground and said pair of front wheels is adapted for selective engagement with the ground,

d) wherein said pair of front wheels are rotatable between a first position, where said wheels are not in contact with the ground and said apparatus is used as a walker, to a second position where said wheels contact the ground and said apparatus is used as a wheelchair.

23. An apparatus in accordance with claim 22, wherein said front wheels are attached to and controllable by handle members.

24. An apparatus in accordance with claim 23, wherein said handle members are coupled to said front legs and not integral therewith.

25. An apparatus in accordance with claim 22, wherein said apparatus is collapsible.

26. An apparatus in accordance with claim 25, wherein said first and second sides are movable from a first position substantially perpendicular to said backrest to a second position substantially parallel to said backrest.

27. An apparatus in accordance with claim 22, wherein said front legs are oriented at an angle from the vertical.

28. An apparatus convertible between a walker and a wheelchair for use on the ground comprising:

a) a frame having a first side, a second side and a backrest extending therebetween, each side having a front leg and a rear leg,

b) said front legs having a pair of front wheels respectively associated therewith and said rear legs having a pair of rear wheels respectively associated therewith,

c) a seat pivotally connected to said frame and movable between a first position during which the apparatus is used as a wheelchair to a second position during which the apparatus is used as a walker, and

d) a converting mechanism associated with one of said pair of wheels, wherein said one of said pair of wheels is movable with the use of said converting mechanism between a first position, where said wheels engage the ground in which the apparatus is used as a wheelchair, to a second position where said wheels are disengaged from the ground in which the apparatus is used as a walker;

e) wherein said converting mechanism further comprises a pair of handle members for respectively moving said each of said pair of wheels about their respective legs between said first and second positions.

29. An apparatus convertible between a walker and a wheelchair for use on the ground comprising:

a) a frame having a first side, a second side and a backrest extending therebetween, each side having a front leg and a rear leg,

b) said front legs having a pair of front wheels respectively associated therewith and said rear legs having a pair of rear wheels respectively associated therewith,

c) a seat pivotally connected to said frame and movable between a first position during which the apparatus is used as a wheelchair to a second position during which the apparatus is used as a walker, and

d) a converting mechanism associated with one of said pair of wheels, wherein said one of said pair of wheels is movable with the use of said converting mechanism between a first position, where said wheels engage the ground in which the apparatus is used as a wheelchair, to a second position where said wheels are disengaged from the ground in which the apparatus is used as a walker,

e) wherein said converting mechanism further comprises a pair of handle members for respectively rotating said each of said pair of movable wheels about their respective legs between said first and second positions.