Adjustable anti-tip wheels for power wheelchair

Details Adjustable anti-tip wheels for power wheelchair Adjustable anti-tip wheels for power wheelchair

2005-07-27

2008-03-18

Shriver, J. A (Department: 3618)

Land vehicles

Wheeled

Attachment

C280S250100, C297S310000

Reexamination Certificate

active

07344155

ABSTRACT:
A power wheelchair is provided having one or more anti-tip wheels for stabilizing the movement of the frame about the drive wheels. An anti-tip wheel is attached to the end of a suspension arm which is pivotally attached to the frame of the wheelchair. A spring resiliently supports the anti-tip wheel in a neutral position relative to the ground upon which the drive wheels of the wheelchair normal ride. A retaining system selectively fixes position of the anti-tip wheels relative to the frame. The retaining system employs a plurality of teeth, with one portion disposed in combination with said suspension arm, and at least one other tooth disposed for engaging said one portion to provide unidirectional retention of the position of said suspension arm relative to the frame. The engagement of the teeth to lock the position of the suspension arm may be responsive to the torque generated by the motor.

REFERENCES:
patent: 1773254 (1930-08-01), Becker
patent: 2767995 (1956-10-01), Stout
patent: 3104112 (1963-09-01), Crail
patent: 3282605 (1966-11-01), Nihlean et al.
patent: 3580591 (1971-05-01), Coffey
patent: 3848883 (1974-11-01), Breacain
patent: 3938608 (1976-02-01), Folco-Zambelli
patent: 4513832 (1985-04-01), Engman
patent: 4515385 (1985-05-01), Christian
patent: 4542918 (1985-09-01), Singleton
patent: 4721321 (1988-01-01), Haury et al.
patent: 4763910 (1988-08-01), Brandli et al.
patent: 5113959 (1992-05-01), Mastov et al.
patent: 5137295 (1992-08-01), Peek
patent: 5181733 (1993-01-01), Tague
patent: 5209509 (1993-05-01), Gay et al.
patent: 5435404 (1995-07-01), Garin, III
patent: 5485140 (1996-01-01), Bussin
patent: 5531284 (1996-07-01), Okamoto
patent: 5540297 (1996-07-01), Meier
patent: 5575348 (1996-11-01), Goertzen et al.
patent: 5628377 (1997-05-01), Le Gloan
patent: 5701122 (1997-12-01), Canedy
patent: 5772237 (1998-06-01), Finch et al.
patent: 5848658 (1998-12-01), Pulver
patent: 5855387 (1999-01-01), Gill et al.
patent: 5904214 (1999-05-01), Lin
patent: 5944131 (1999-08-01), Schaffner et al.
patent: 5957474 (1999-09-01), Mundy et al.
patent: 5964473 (1999-10-01), Degonda et al.
patent: 6041876 (2000-03-01), Pulver et al.
patent: 6070898 (2000-06-01), Dickie et al.
patent: 6073951 (2000-06-01), Jindra et al.
patent: 6129165 (2000-10-01), Schaffner et al.
patent: 6199647 (2001-03-01), Schaffner et al.
patent: 6357793 (2002-03-01), Dickie et al.
patent: 6460641 (2002-10-01), Kral
patent: 6494474 (2002-12-01), Kramer, Jr.
patent: 6533306 (2003-03-01), Watkins
patent: 6543798 (2003-04-01), Schnaffer
patent: 6554086 (2003-04-01), Goertzen et al.
patent: 6640916 (2003-11-01), Schaffner et al.
patent: 6776430 (2004-08-01), White et al.
patent: 6796568 (2004-09-01), Martis et al.
patent: 6851711 (2005-02-01), Goertzen et al.
patent: 6923278 (2005-08-01), Mulhern et al.
patent: 6938923 (2005-09-01), Mulhern et al.
patent: 7083195 (2006-08-01), Goertzen et al.
patent: 2001/0011612 (2001-08-01), Takenaka et al.
patent: 2001/0011613 (2001-08-01), Schaffner et al.
patent: 2003/0075365 (2003-04-01), Fought
patent: 2003/0159862 (2003-08-01), Wu
patent: 2004/0004342 (2004-01-01), Mulhern et al.
patent: 2004/0084230 (2004-05-01), Grymko et al.
patent: 2004/0094944 (2004-05-01), Goertzen et al.
patent: 2004/0150204 (2004-08-01), Goertzen et al.
patent: 2005/0151360 (2005-07-01), Bertrand et al.
patent: 2215054 (1974-08-01), None
patent: 2399822 (1979-03-01), None
patent: WO 82/00445 (1982-02-01), None
patent: WO 90/06097 (1990-06-01), None
patent: WO 96/15752 (1996-05-01), None
patent: WO 99/17700 (1999-04-01), None
patent: WO 00/12040 (2000-03-01), None
patent: WO 00/54718 (2000-09-01), None
patent: WO 00/66060 (2000-11-01), None
patent: WO 03/101364 (2003-12-01), None
U.S. Appl. No. 09/765,022, filed Jan. 2001, Watkins.

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