Electronically controlled hydraulic exercising system

Details Electronically controlled hydraulic exercising system Electronically controlled hydraulic exercising system

1976-04-26

1977-12-20

Skogquist, Harland S.

Undertaking

272DIG4, A63B 2100

Patent

active

040637263

ABSTRACT:
An electronically controlled hydraulic exercising system employing a fluid actuated piston which is controlled by a device which automatically and selectively proportions in varying amounts the exercise resistance in each of two directions of movement of the piston. The device automatically controls the resistance by the use of electronic flip flop type logic network.

REFERENCES:
patent: 2068578 (1937-01-01), Stronach
patent: 3369403 (1968-02-01), Carlin et al.
patent: 3451271 (1969-06-01), Knobwauch
patent: 3465592 (1969-09-01), Perrine
patent: 3784194 (1974-01-01), Perrine
patent: 3848467 (1974-11-01), Flavell
patent: 3902480 (1975-09-01), Wilson

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