Exercise device and control valve therefor

Details Exercise device and control valve therefor Exercise device and control valve therefor

1982-05-26

1984-10-23

Johnson, Richard J.

Undertaking

13761417, 251209, A63B 2100, F16K 510

Patent

active

044784120

ABSTRACT:
A control valve for use in a hydraulic system which includes a cylinder and a piston. The control valve has a casing with a cylindrical bore and a plurality of angularly spaced passages extending from the bore to the outside of the casing. A cylindrical rotor is rotatably mounted within the bore in the casing. The rotor has an upper chamber, a lower chamber, an orifice connecting the chambers and a plurality of angularly spaced ports to permit flow between the chambers and the passages in the casing. A check is located in one of the chambers in the rotor, and a mandrel is located in one of the chambers in the rotor to control flow through the orifice.

REFERENCES:
patent: 915543 (1909-03-01), Billiard
patent: 1616335 (1927-02-01), Rochefort
patent: 2095560 (1937-10-01), Vickers
patent: 2391126 (1945-12-01), Carter
patent: 2538215 (1951-01-01), Stack
patent: 3037354 (1962-06-01), Tennis
patent: 3165117 (1965-01-01), Finelt
patent: 3912265 (1975-10-01), Muir
patent: 4037623 (1977-07-01), Beswick
patent: 4235437 (1980-11-01), Ruis
patent: 4291787 (1981-09-01), Brentham

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