Land vehicles – Wheeled – Attachment
Reexamination Certificate
2007-12-25
2007-12-25
Culbreth, Eric (Department: 3616)
Land vehicles
Wheeled
Attachment
C016S01800R, C016S021000, C016S026000, C016S028000, C180S907000, C301S037101, C301S037420
Reexamination Certificate
active
10849654
ABSTRACT:
A wheelchair is provided with front anti-tip wheels adapted to assist the wheelchair in mounting an obstacle that the wheelchair approaches obliquely. The anti-tip wheels may function as casters, capable of rotating about a vertical axis, or may be fixed for rotation about a horizontal axis only. The anti-tip wheels may include lateral convex surfaces which tend to allow the anti-tip wheel to slide or roll over the obstacle. The lateral convex surfaces may be provided by a laterally oriented rolling element, a convex-shaped hub, a convex-shaped housing that partially surrounds the wheel, or a ball-shaped wheel. Alternatively, rotation of the anti-tip wheel may be controlled such that the wheel rolling surface faces and engages the obstacle.
REFERENCES:
patent: 3001601 (1961-09-01), Aghnides
patent: 3040371 (1962-06-01), Rice et al.
patent: 3127632 (1964-04-01), Rice et al.
patent: 3212594 (1965-10-01), Scott
patent: 3381973 (1968-05-01), Carr
patent: 3424259 (1969-01-01), Aghnides
patent: 3695375 (1972-10-01), Splawinski
patent: 3746112 (1973-07-01), Ilon
patent: 3821995 (1974-07-01), Aghnides
patent: 3861435 (1975-01-01), Vincent et al.
patent: 4119163 (1978-10-01), Ball
patent: 4353428 (1982-10-01), Kovar et al.
patent: 4375295 (1983-03-01), Yolin
patent: 4400032 (1983-08-01), dePolo
patent: 4566707 (1986-01-01), Nitzberg
patent: 4592570 (1986-06-01), Nassiri
patent: 4618155 (1986-10-01), Jayne
patent: 4733737 (1988-03-01), Falamak
patent: 4785899 (1988-11-01), von Winckelmann
patent: 4811966 (1989-03-01), Singleton
patent: 4926952 (1990-05-01), Farnam
patent: 4958651 (1990-09-01), Najm
patent: 4995679 (1991-02-01), Segerljung
patent: 5186270 (1993-02-01), West
patent: 5249636 (1993-10-01), Kruse et al.
patent: 5275248 (1994-01-01), Finch et al.
patent: 5323867 (1994-06-01), Griffin et al.
patent: 5374879 (1994-12-01), Pin et al.
patent: 5383715 (1995-01-01), Homma et al.
patent: 5401045 (1995-03-01), Foerster et al.
patent: 5445233 (1995-08-01), Fernie et al.
patent: 5513716 (1996-05-01), Kumar et al.
patent: 5593174 (1997-01-01), Graziano et al.
patent: 5649605 (1997-07-01), Rønne et al.
patent: 5697465 (1997-12-01), Kruse
patent: 5927423 (1999-07-01), Wada et al.
patent: 5950749 (1999-09-01), Inoue
patent: 5964473 (1999-10-01), Degonda et al.
patent: 6079510 (2000-06-01), Miyamoto
patent: 6135228 (2000-10-01), Asada et al.
patent: 6202773 (2001-03-01), Richey, II et al.
patent: 6428020 (2002-08-01), Steadman
patent: 6474434 (2002-11-01), Bech
patent: 6752230 (2004-06-01), Huang
patent: 2 473 423 (1981-07-01), None
patent: 2 192 595 (1988-01-01), None
patent: WO 98/02122 (1998-01-01), None
patent: WO 00/54718 (2000-09-01), None
Commercially available wheelchair anti-tip wheel, Invacare Corporation. Figs. 1-4, date unknown, admitted to be prior art.
Commercially available wheelchair anti-tip wheel, Pride Mobility, Inc., Figs. 5-7, date unknown, admitted to be prior art.
Invacare Corporation, Parts Catalog,Storm Series® TDX™, TDX™4, TDX™5 Powered Wheelchairs, Apr. 23, 2004, (Cover page and p. 38, “Caster, 6″ Front and Rear”).
Invacare Corporation, Parts Catalog,Xterra™GT™ Powered Wheelchair, Apr. 1, 2004, (Cover and page and p. 73 “Front 8 and Rear 6″ Caster Assembly”).
Acroname, Inc., “Using an Omni-directional Wheel as a Caster,” date unknown.
Culbreth Eric
DLA Piper (US) LLP
Pride Mobility Products Corporation
LandOfFree
Anti-tip wheel for a 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 Anti-tip wheel for a wheelchair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-tip wheel for a wheelchair will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3826591