Low impact hand rim apparatus for hand-propelled wheelchair

Details Low impact hand rim apparatus for hand-propelled wheelchair Low impact hand rim apparatus for hand-propelled wheelchair

1999-01-29

2000-09-19

Swann, J. J.

Land vehicles

Wheeled

Occupant propelled type

2803041, B62M 114

Patent

active

061200476

ABSTRACT:
A hand rim assembly for a wheelchair wheel is disclosed, which includes an larger diameter hand rim and a smaller diameter hand rim. In one embodiment, the hand rim assembly is biasly coupled to the wheelchair wheel by a plurality of shock absorbing resilient fasteners. The shock absorbing resilient fasteners generally lessen the shock impact to the user's hands, arms, and shoulders, thus reducing the potential for repetitive stress injury and the like. In another embodiment, the smaller diameter hand rim has a different exterior coefficient of friction than that of the larger diameter rim so that users can use the hand rim with a higher coefficient of friction for propulsion and the rim with a lower coefficient of friction for braking. In addition, the rim used for braking, typically the smaller diameter rim, is formed of a thermally conductive material to reduce the potential for burning of the user's hands during braking.

REFERENCES:
patent: 3899189 (1975-08-01), Watkins
patent: 4366964 (1983-01-01), Farey et al.
patent: 4593929 (1986-06-01), Williams
patent: 5160156 (1992-11-01), Mendon
patent: 5306035 (1994-04-01), Counts
patent: 5479672 (1996-01-01), Brown et al.
patent: 5791672 (1998-08-01), Masclet
patent: 5927739 (1999-07-01), Evling
patent: 5988661 (1999-11-01), Garfinkle

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