Control valve

Details Control valve Control valve

1988-01-14

1989-06-20

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

13762526, F16K 1104

Patent

active

048401986

ABSTRACT:
A directional control valve includes a housing with a pressure inlet port, two working ports and a vent port with one working port directly connected to the vent port and the other working port communicating with the vent port via a control piston. The control piston includes a sliding valve in the area of one working port and a seat valve in the area of the other working port. A throttle bush rotatably arranged in the housing and a throttle screw rotatable relative to the throttle bush cooperate with the control valve to modify and throttle separately and independently from each other the cross sectional ventilating areas for the working ports.

REFERENCES:
patent: 1679614 (1928-08-01), Lichtenberg
patent: 1921092 (1933-08-01), Newton
patent: 2496036 (1950-11-01), Christensen

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