Undertaking
Patent
1988-12-01
1990-06-05
Apley, Richard J.
Undertaking
272128, 272132, 272DIG6, A63B 2124
Patent
active
049307703
ABSTRACT:
A processor controlled eccentrically loaded exercise machine for providing a resisting or powering force which can be varied by position in order to carry out positive or negative exercise strokes. A variable torque motor provides a torque to a torque coupler. The torque coupler is coupled to the user interface device through a mechanical link. During a positive exercise stroke, the motor supplies a torque to a slipping torque coupler so as to provide an eccentrically loaded resisting force, which resists the force exerted by the user in moving the exercising device as his muscle contracts. During a negative exercise stroke, the torque coupler engages to provide a powering force, as supplied by torque motor, against the contracted muscle of the user. A position sensor and a load cell are coupled to the user interface device for providing position and force signals to the processor. The processor, by controlling the motor torque and the torque coupling of the torque coupler, is capable of providing a resisting or powering force which can be varied by position for providing various modes of exercise available to the user, including the ability to immediately switch between positive-negative or negative-positive exercise at any position within the exercise machines range of motion.
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Apley Richard J.
Cheng Joe H.
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