Adjustable hydraulic load-resisting mechanisms for exercise mach

Details Adjustable hydraulic load-resisting mechanisms for exercise mach Adjustable hydraulic load-resisting mechanisms for exercise mach

1986-10-09

1988-06-14

Apley, Richard J.

Undertaking

272130, 188313, A63B 6906, F16F 500

Patent

active

047507357

ABSTRACT:
An exercise rowing machine has a frame and a swing arm pivotally connected thereto which is manually pushed and pulled in opposition to an adjustable hydraulic load-resisting mechanism pivotally connected between the frame and the arm. This mechanism has a pair of spring-loaded, independently adjustable flow control valves at opposite ends for controlling flow to and from opposite ends of a cylinder which a double-acting piston reciprocates responsive to movement of the swing arm. The range of adjustment of the spring pressure on the valves is preset.

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patent: 3495824 (1970-02-01), Cuinier
patent: 4448412 (1984-05-01), Brentham
patent: 4541627 (1985-09-01), MacLean et al.
patent: 4566692 (1986-01-01), Brentham
patent: 4629185 (1986-12-01), Amann

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