Wheelchair

Details Wheelchair Wheelchair

1996-09-23

1999-02-02

Boehler, Anne Marie

Land vehicles

Wheeled

Occupant propelled type

280238, 280246, 188 2F, B62M 116

Patent

active

058654550

ABSTRACT:
This wheelchair employs the use of push levers attached to drive gear sprockets, which propel the main rear wheels of the chair through bicycle chains connecting the front sprockets to gear clusters mounted on the rear wheel axles. Ratchet mechanisms allow each push lever to transmit power in either a forward or reverse direction. Derailers are mounted over the rear axles and are activated by shifter mechanisms mounted on the push levers. Calliper-type wheel brakes are mounted on the frame beside each wheel and activated by hand brake levers mounted on the push levers.

REFERENCES:
patent: 3994509 (1976-11-01), Schaeffer
patent: 4316616 (1982-02-01), Boivin
patent: 4560181 (1985-12-01), Herron
patent: 4705284 (1987-11-01), Stout
patent: 4735431 (1988-04-01), Tait
patent: 4865344 (1989-09-01), Romer et al.
patent: 5020818 (1989-06-01), Oxford
patent: 5291972 (1994-03-01), Griffith
patent: 5499833 (1996-03-01), Her et al.
patent: 5632499 (1997-05-01), Hutcherson

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