1980-03-27
1981-06-30
Johnson, Richard J.
Undertaking
272130, A63B 2108, A63B 2302
Patent
active
042758823
ABSTRACT:
A hydraulic shock absorber has an adjustable connection to the exercise lever to provide variable resistive forces to exercise, and alternately the shock can be mounted to the exercise lever as a dead weight and a pulley-cord system added, so that a multiplicity of exercises can be performed with the same basic unit.
REFERENCES:
patent: 3638941 (1972-02-01), Kulkens
patent: 3971555 (1976-07-01), Mahnke
patent: 4066259 (1978-01-01), Brentham
Grosser Richard W.
Long, Sr. Virgil L.
AMF Incorporated
Johnson Richard J.
Lewis Walter
Price George W.
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