Vent control for cylinder mounted load check valves

Details Vent control for cylinder mounted load check valves Vent control for cylinder mounted load check valves

F - Mech Eng,Light,Heat,Weapons

15

B

138/62

F15B 11/00 (2006.01) F15B 13/01 (2006.01)

Patent

CA 1047367

VENT CONTROL FOR CYLINDER MOUNTED LOAD CHECK VALVES Abstract of the Disclosure A fluid source delivers fluid to a control valve having Float, First direction and Second direction positions. A piston-bore check valve allows flow to the motor and normally blocks reverse flow, the piston having its first end biased against a seat. Flow is restricted between the motor's first end and a control chamber which communicates with the piston's second end. A full flow path between the motor's first end and the bore provides a force acting against the piston's first end. A drain valve entry port communicates with the motor's first end and an exit port thereof communicates with a sump to provide either entry port-exit port connection or blocking. A mechanism moves responsive to shifting of the control valve to shift the drain valve to connect the entry and exit ports when the control valve is in a Float or a Lower position and to block such connection in a Raise or Neutral position.

290867

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