Hydraulic apparatus for controlling movement of a member under l

Details Hydraulic apparatus for controlling movement of a member under l Hydraulic apparatus for controlling movement of a member under l

1974-12-18

1977-04-19

Cohen, Irwin C.

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

91449, F15B 1108, F15B 13042

Patent

active

040181367

ABSTRACT:
Disclosed herein is an apparatus including a member mounted on a frame and biased for movement in one direction, a hydraulic cylinder-piston assembly connected between the frame and the member and including a piston and a cylinder which houses the piston and includes opposed ends, together with a first fluid line extending from the one of the cylinder ends toward which the piston moves incident to movement of the member in the one direction, a second fluid line extending from the other of the cylinder ends, a control valve operatively connected to a source of pressure fluid and to the first and second fluid lines and including selectively operable means for supplying and draining fluid from the cylinder, a first safety valve in the first fluid line and first hydraulic means operatively connected to the first valve member for displacing the first valve member from a flow permitting position and second hydraulic means operatively connected to the second valve member for displacing the second valve member from a duct closing position.

REFERENCES:
patent: 1117993 (1914-11-01), Frazier
patent: 1171695 (1916-02-01), Brady
patent: 1883240 (1932-10-01), Phelan
patent: 1964196 (1934-06-01), Cuttat
patent: 2255787 (1941-09-01), Kendrick
patent: 2538806 (1951-01-01), St. Clair
patent: 2701704 (1955-02-01), Lawrence
patent: 2893082 (1959-07-01), Hodler
patent: 2926634 (1960-03-01), Falendysz et al.
patent: 3018902 (1962-01-01), Minty
patent: 3675891 (1972-07-01), Reynolds et al.
patent: 3700396 (1972-10-01), Adams
patent: 3835751 (1974-09-01), Cowan

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