Adjustable anti-tip wheels for power wheelchair

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

2005-08-02

2005-08-02

Shriver, J. Allen (Department: 3618)

Motor vehicles

Power

Electric

C180S907000, C180S209000, C280S304100, C280S250100

Reexamination Certificate

active

06923278

ABSTRACT:
A power wheelchair with front anti-tip wheels for substantially eliminating partial tips of the wheelchair is described. The anti-tip wheels are attached to the end of an extension arm which is attached to the frame of the wheelchair. A spring connects the anti-tip wheels with the frame at a second point. The spring tends to hold the anti-tip wheels in a neutral position at a predetermined height above the ground. A lowering mechanism is provided which positions the anti-tip wheels in a position engaged with or just above the ground. A retaining system holds the anti-tip wheels on or near the ground until the user or a release trigger device releases the retaining system, at which time the anti-tip wheels return to the neutral position. While the retaining system is disengaged, the wheels are free to rise in response to an upward force in order to climb over an obstacle in the wheelchair's path of travel.

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: 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: 6554086 (2003-04-01), Goertzen et al.
patent: 6640916 (2003-11-01), Schaffner et al.
patent: 2001/0011612 (2001-08-01), Takenaka 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: 2.215.054 (1974-08-01), None
patent: 2.399.822 (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. 18, 2001, Watkins.

Affiliated with

Also associated with

Rating

Adjustable anti-tip wheels for power wheelchair does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adjustable anti-tip wheels for power wheelchair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable anti-tip wheels for power wheelchair will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3523221