Hydraulic exercising machines

Details Hydraulic exercising machines Hydraulic exercising machines

1986-08-25

1989-01-24

Apley, Richard J.

Undertaking

60413, A63B 2100

Patent

active

047996765

ABSTRACT:
An exercising machine incorporates one or a pair of hydraulic rams to be actuated by a user. The resistance to effort within the hydraulic circuit can be increased by operating a pump so that hydraulic fluid enters a pressure accumulator to compress gas therein. A pressure gauge indicates the pressure level set and the circuits for the two rams can be set individually, selectively bleeding off hydraulic fluid to a reservoir by operation of valves. Consequently the exercising machine can be set to a number of required operating levels without resorting to the use of weights as with conventional exercising machines.

REFERENCES:
patent: 3465592 (1969-09-01), Perrine
patent: 4043122 (1977-08-01), Graham
patent: 4063726 (1977-12-01), Wilson
patent: 4257593 (1981-03-01), Keiser
patent: 4341149 (1982-07-01), Dezelan
patent: 4406454 (1983-09-01), Dean
patent: 4444390 (1984-04-01), Erickson
patent: 4478412 (1984-10-01), Muir

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