Apparatus for controlling a single action operating cylinder, es

Details Apparatus for controlling a single action operating cylinder, es Apparatus for controlling a single action operating cylinder, es

1980-10-27

1983-05-17

Nilson, Robert G.

Motors: expansible chamber type

With motive fluid valve

Self-opening exhaust valve held closed by inlet pressure

137107, F15B 1108

Patent

active

043834760

ABSTRACT:
An apparatus for controlling a single action piston and cylinder having means biasing the piston toward a retracted position within the cylinder and having a non-return valve openable toward the cylinder connecting the cylinder with a fluid pressure source comprises a control valve and a proportional valve. The control valve has an inlet in fluid communication with a supply tank, an outlet in fluid communication with a supply tank, a control port in fluid communication with the fluid pressure source, and a control element movable between open and closed positions for controlling flow of fluid pressure from the inlet to the outlet. The control element is spring biased toward the open position and forced toward the closed position by pressure entering through the control port. The proportional valve regulates the pressure entering through the control port.

REFERENCES:
patent: 3958495 (1976-05-01), Bernhoft
patent: 4036106 (1977-07-01), Athy
patent: 4210165 (1980-07-01), Kitsugi

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