Wheelchair hand propulsion apparatus

Details Wheelchair hand propulsion apparatus Wheelchair hand propulsion apparatus

1988-07-13

1989-09-12

Marmor, Charles A.

Land vehicles

Wheeled

Occupant propelled type

2803041, 280358, 74142, B62M 104

Patent

active

048653446

ABSTRACT:
An apparatus or attachment to a wheelchair to allow a patient to move the chair in a forward, reverse, right or left direction. The apparatus comprises a push rod, spring mounted, actuating at a first end a pawl capable of engaging a ratchet axially mounted on a mounting plate attached to the side of the chair. A hand operated shift element activates a cam roller to move the push rod at a second end in a vertical direction. A bicycle type multi linked gear and chain connects the ratchet to the rear driving wheels of the chair. Movement of the push rod in its vertical position changes gears and a handle attached to the top of the push rod assembly permits movement of the chair by direct drive to the bicycle chain. A linkage connecting the push rod housing to the front mounted caster wheel allows the patient to move the caster wheels by turning the push rod handle connected to its housing.

REFERENCES:
patent: 302090 (1884-07-01), Bernhard
patent: 838228 (1906-12-01), Williams
patent: 846130 (1907-03-01), Muller
patent: 1058173 (1913-04-01), Whitaker
patent: 2643898 (1953-06-01), Everest et al.
patent: 4455029 (1984-06-01), Taylor
patent: 4460190 (1984-07-01), Spiess
patent: 4506900 (1985-03-01), Korosue
patent: 4641847 (1987-02-01), Busse
patent: 4652026 (1987-03-01), Byrge

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