Wheel assembly for a wheelchair

Details Wheel assembly for a wheelchair Wheel assembly for a wheelchair

1995-05-15

1996-10-08

Johnson, Brian L.

Motor vehicles

Power

Electric

180 656, 180907, B60K 100, B60K 700

Patent

active

055621740

ABSTRACT:
A wheel assembly for a wheelchair includes a mounting plate fixed on one side of the seat portion, a motor and a gear unit which includes a gear disc, and a gear shaft that extends through the gear disc. The motor includes a driving worm fixed on the motor shaft so as to mesh with the gear disc. The gear disc is formed with an engaging recess. The gear shaft carries a slidable transverse key thereon. A spring biases the gear shaft to engage the key in the recess. A driving gear is fixed on the gear shaft. A driven gear is mounted rotatably on the mounting plate and is fastened to a wheel. A chain interconnects the driving gear and the driven gear. A hand lever can be moved against the bias action of the spring so as to disengage the key from the recess of the gear disc.

REFERENCES:
patent: 3930551 (1976-01-01), Cragg
patent: 3955639 (1976-05-01), Cragg
patent: 4570739 (1986-02-01), Kramer
patent: 5094310 (1992-03-01), Richey et al.
patent: 5186269 (1993-02-01), Avakian et al.
patent: 5199520 (1993-04-01), Chen
patent: 5350032 (1994-09-01), Smith

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