Foldable wheelchair with extensible link assembly and method

Details Foldable wheelchair with extensible link assembly and method Foldable wheelchair with extensible link assembly and method

2008-06-10

2008-06-10

Bottorff, Christopher (Department: 3618)

Land vehicles

Wheeled

Extensible

C280S647000, C280S649000

Reexamination Certificate

active

07384058

ABSTRACT:
A foldable wheelchair (21) and foldable wheelchair frame assembly (26, 126) including a pair of side frames (24, 124, 224, 324), a cross-bracing frame assembly (36, 136) coupling the side frames (24, 124, 224, 324) together for movement transversely between a spaced apart deployed position and a proximate folded position. A variable length link assembly (61, 161, 261, 361) is mounted into and forms a part of the cross-bracing frame assembly (36, 136) in a position between at least one of the side frames (24, 124, 224, 324) and a remainder of the cross-bracing frame assembly. The extensible link assembly (61, 161, 261, 361) being formed for variation of the overall length in a direction extending transversely between the side frames (24, 124, 224, 324) during movement of the side frames (24, 124, 224, 324) between the deployed and the folded positions so as not to force the side frames (24, 124, 224, 324) into unparallel motion which causes the upholstery to bind the folding mechanism. The extensible link assembly (61, 161, 261, 361) is preferably and over-center linkage that is resiliently biased to the extended position. A method of providing a foldable wheelchair frame assembly (26, 126) is also disclosed.

REFERENCES:
patent: 4042250 (1977-08-01), Rodaway
patent: 4542918 (1985-09-01), Singleton
patent: 4682783 (1987-07-01), Küschall
patent: 4861056 (1989-08-01), Duffy, Jr. et al.
patent: 4989890 (1991-02-01), Lockard et al.
patent: 5112069 (1992-05-01), Aldus et al.
patent: 5253886 (1993-10-01), Weege
patent: 5328183 (1994-07-01), Counts
patent: 5358263 (1994-10-01), Aldus et al.
patent: 5496050 (1996-03-01), Geiger et al.
patent: 5857688 (1999-01-01), Swearingen
patent: 5915709 (1999-06-01), Radjenovic et al.
patent: 6227559 (2001-05-01), Slagerman et al.
patent: 6241275 (2001-06-01), Slagerman
patent: 6572133 (2003-06-01), Stevens
patent: 6616172 (2003-09-01), Cockram
patent: 6769503 (2004-08-01), Cheng
patent: 6932369 (2005-08-01), Walsh et al.
patent: 7000938 (2006-02-01), Watkins
patent: 7052023 (2006-05-01), Chen et al.
patent: 2001/0013721 (2001-08-01), Ishii
patent: 2003/0006578 (2003-01-01), Melgarejo et al.
patent: 2003/0189317 (2003-10-01), Chen et al.
patent: 2004/0021298 (2004-02-01), Tsai
patent: 2004/0021299 (2004-02-01), Tsai
Brochure entitledThe City Sports—New 01m, date unknown, Star OX, Japan.
Brochure entitledOX—MC-01, date unknown, OX, Japan.

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