Rapid thrust exercise machine

Details Rapid thrust exercise machine Rapid thrust exercise machine

1978-09-05

1980-12-30

Pinkham, Richard C.

Undertaking

272134, A63B 2100

Patent

active

042419131

ABSTRACT:
An exercise machine utilizing a pivotal bar wherein resistance to applied force in one direction is provided by the passing of hydraulic fluid through an adjustable orifice and including a fluid bypass around said orifice to eliminate resistance to the force applied in the opposite direction.

REFERENCES:
patent: D226439 (1973-03-01), Coker
patent: 3369403 (1968-02-01), Carlin et al.
patent: 3465592 (1969-09-01), Perrine
patent: 3638941 (1972-02-01), Kulkens
patent: 3822599 (1974-07-01), Brentham
patent: 3850431 (1974-11-01), Winans

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