Wheelchair suspension

Details Wheelchair suspension Wheelchair suspension

2005-09-23

2008-05-13

Rodriguez, Saul (Department: 3616)

Land vehicles

Wheeled

Extensible

C180S065100

Reexamination Certificate

active

07370876

ABSTRACT:
A side frame assembly for a wheelchair suspension includes a mainframe, and a front caster frame connected pivotally to both a front end of the mainframe and a front caster. A return spring is disposed between the front caster frame and the mainframe so as to bias the front caster to a predetermined position. A drive wheel assembly includes a drive wheel frame, a drive wheel disposed pivotally on the drive wheel frame, and a driving unit operable to rotate the drive wheel. A linkage is connected pivotally to the mainframe, the front caster frame and the drive wheel frame. A rear caster assembly includes a rear caster frame attached to a rear end of the mainframe, and a rear caster disposed pivotally on the rear caster frame.

REFERENCES:
patent: 4310167 (1982-01-01), McLaurin
patent: 5855387 (1999-01-01), Gill et al.
patent: 6454286 (2002-09-01), Hosino
patent: 6923278 (2005-08-01), Mulhern et al.
patent: 7055835 (2006-06-01), Wu
patent: 2004/0060748 (2004-04-01), Molnar
patent: 2004/0168839 (2004-09-01), Wu
patent: 2005/0034903 (2005-02-01), Wu
patent: 2005/0206149 (2005-09-01), Mulhern et al.
patent: 2006/0201723 (2006-09-01), Hsu et al.
patent: 2006/0213705 (2006-09-01), Molnar
patent: 2007/0023209 (2007-02-01), Wu
patent: 2007/0209845 (2007-09-01), Chen et al.

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