Particle brake clutch muscle exercise and rehabilitation apparatus
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United States of America Patent
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-
Aug 23, 1988
Issued Date -
N/A
app pub date -
Jun 8, 1987
filing date -
Nov 29, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A muscle exercise and rehabilitation apparatus includes a movable fixture against which an actuating force can be applied; a particle brake clutch for applying a braking force to the fixture in linear dependence on a braking current supplied thereto, in counteracting relation to the actuating force; a control circuit for controlling the supply of braking current to the particle brake clutch so that the latter controls the fixture to move in at least one of an isometric, isotonic and isokinetic mode of operation; and a hysteresis compensating circuit for supplying a reverse current to the particle brake clutch to cancel out hysteresis in the particle brake clutch in dependence on the amount of braking current previously supplied to the particle brake clutch.
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