Load check valve cylinder mounted

Details Load check valve cylinder mounted Load check valve cylinder mounted

1977-04-07

1979-08-28

Cohen, Irwin C.

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

91445, 91447, 91451, 91452, 91464, F15B 1108, F15B 13042

Patent

active

041656750

ABSTRACT:
A hydraulic motor and control system which comprises a pump delivering fluid to a control valve. The control valve has a Float position which connects a first end of the motor to sump, a First position for applying fluid from the pump to power the motor in a first direction by delivering fluid to the motor's first end via a flow path and a Second position in which the motor moves in a second and opposite direction. A conduit connects the control valve to the sump. A check valve is provided in the flow path which always allows flow therethrough towards the motor's first end and normally blocks reverse flow therethrough. A mechanism opens the check valve to permit reverse flow therethrough responsive to operation of the control valve in the Float position and in the Second position.

REFERENCES:
patent: 3049101 (1962-08-01), Ruhl
patent: 3127688 (1964-04-01), Hein et al.
patent: 3216448 (1965-11-01), Stacey
patent: 3274902 (1966-04-01), Kleckner
patent: 3523490 (1970-08-01), Bianchetta
patent: 3788401 (1974-01-01), Scheidt et al.
patent: 3795255 (1974-03-01), Malott et al.
patent: 3800670 (1974-04-01), Hufeld et al.
patent: 3908515 (1975-09-01), Johnson
patent: 4006667 (1977-02-01), Biachetta et al.
patent: 4018350 (1977-04-01), Brown

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