Undertaking
Patent
1987-02-26
1988-06-14
Picard, Leo P.
Undertaking
272129, A63B 2100
Patent
active
047507381
ABSTRACT:
A physical exercise apparatus for isokinetic and eccentric training which employs a permanent magnet electric motor/generator as the means for generating positive and negative loads. An electrical braking circuit which employs zener diodes governs the speed of a permanent magnet electric generator by providing a sharp increase of resisting torque with increasing rotation speed when the rotation speed reaches a predetermined value.
REFERENCES:
patent: 3572700 (1971-03-01), Mastropaolo
patent: 4261562 (1981-04-01), Flavell
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