Wheelchair anti-rollback mechanism

Details Wheelchair anti-rollback mechanism Wheelchair anti-rollback mechanism

1984-03-15

1985-09-03

Peters, Jr., Joseph F.

Land vehicles

Wheeled

Occupant propelled type

188 823, 188 8284, 297DIG4, B62M 114

Patent

active

045388253

ABSTRACT:
The customary side hand propulsion ring adjacent to each main wheel of a manual wheelchair is mounted through a lost motion connection between the propulsion ring and main wheel so that the propulsion ring can have limited rotational movement relative to the main wheel. A friction brake drum or partial drum fixed to the wheelchair frame inside of the main wheel is engaged by at least one of a plurality of circumferentially spaced over center friction locking devices pivotally held on the main wheel. Each over center friction locking device is moved by a release element to a non-locking position relative to the drum or partial drum in response to reverse movement of the propulsion ring by a chair occupant. Economy and ease of operation are provided for. The wheelchair occupant need not remove his or her hand from the propulsion ring when operating the anti-rollback mechanism.

REFERENCES:
patent: 3869146 (1975-03-01), Bulmer
patent: 3897857 (1975-08-01), Rodaway
patent: 4320818 (1982-03-01), Knoche
patent: 4462605 (1984-07-01), Morgan et al.

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