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    Wheelchair Anti-rollback Mechanism

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    4538825.pdf (494.7Kb)
    Date
    9/3/1985
    Author
    Delahoussaye, Ronald D.
    Brazell II, James W.
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    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.
    URI
    http://hdl.handle.net/1853/57576
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    • Georgia Tech Patents [1761]

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