Pressure reducing valve for dead engine lowering

Details Pressure reducing valve for dead engine lowering Pressure reducing valve for dead engine lowering

F - Mech Eng,Light,Heat,Weapons

15

B

138/79.14

F15B 13/01 (2006.01)

Patent

CA 1170543

Pressure Reducing Valve For Dead Engine Lowering Abstract A fluid system having a directional control valve operated by a pilot valve having a manually operable control handle for selectively controlling a fluid motor in positioning a load. The pilot valve includes a spool cooperating with associated portions of the pilot valve to provide a pressure regulated pilot signal to the directional control valve during normal operation of the system. The spool includes a recess which is placed in communication with the high pressure portion of the motor cylinder during a dead engine condition by manipulation of the handle to provide pressure regulated deliverey of the fluid from the motor through the recess and to the conduit normally controlling the directional control valve for effecting a controlled lowering or retraction of the load. A single pilot valve is utilized for effecting the pressure regulated control in both normal and dead engine conditions.

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