Particle brake clutch muscle exercise and rehabilitation apparat

Details Particle brake clutch muscle exercise and rehabilitation apparat Particle brake clutch muscle exercise and rehabilitation apparat

1987-06-08

1988-08-23

Picard, Leo P.

Surgery

Truss

Perineal

272125, 272129, A63B 2300

Patent

active

047653159

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.

REFERENCES:
patent: 4569518 (1986-02-01), Fulks
patent: 4570927 (1986-02-01), Petrofsky et al.
patent: 4577862 (1986-03-01), Sagedahl
patent: 4609190 (1986-09-01), Brentham
patent: 4613129 (1986-09-01), Schroeder et al.
patent: 4620703 (1986-11-01), Greenhut
patent: 4625962 (1986-12-01), Street
patent: 4674741 (1987-06-01), Pasierb, Jr. et al.
patent: 4676501 (1987-06-01), Hoagland et al.
patent: 4678182 (1987-07-01), Nakao et al.
patent: 4678184 (1987-07-01), Neiger et al.
patent: 4702108 (1987-10-01), Amundsen et al.
patent: 4705271 (1987-11-01), Mondloch et al.
patent: 4709917 (1987-12-01), Yang
patent: 4711450 (1987-12-01), McCarthur

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