Medical wheelchair whose seat having a height adjustable...

Details Medical wheelchair whose seat having a height adjustable... Medical wheelchair whose seat having a height adjustable...

2011-04-26

2011-04-26

Dickson, Paul N (Department: 3611)

Land vehicles

Wheeled

Occupant propelled type

C280S647000, C701S049000

Reexamination Certificate

active

07931288

ABSTRACT:
A medical wheelchair includes a support frame, a front bracket pivotally connected with the support frame, a rear bracket pivotally connected with the support frame, a mounting bracket pivotally connected between the front bracket and the rear bracket, a seat unit mounted on the mounting bracket, and a drive mechanism mounted between the support frame and the mounting bracket to move the mounting bracket and to adjust the height of the seat unit. Thus, the support frame, the mounting bracket, the front bracket and the rear bracket form a parallelogram linkage, so that the mounting bracket is moved smoothly to prevent the seat unit from being vibrated during adjustment of the height of the seat unit. In addition, the drive mechanism provides a buffering effect to the mounting bracket so that the mounting bracket and the seat unit are moved smoothly and stably.

REFERENCES:
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patent: 2005/0121961 (2005-06-01), Beauchesne et al.
patent: 2006/0225212 (2006-10-01), Parson et al.
patent: 2008/0133089 (2008-06-01), Bayomy et al.
patent: 2008/0157501 (2008-07-01), Moller
patent: 2009/0218784 (2009-09-01), Porcheron

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