Solenoid-actuated directional control valve

Details Solenoid-actuated directional control valve Solenoid-actuated directional control valve

1985-02-22

1986-10-14

Scott, Samuel

Fluid handling

Systems

Multi-way valve unit

13762569, 13762534, 251 50, 25112915, F16K 4700

Patent

active

046166750

ABSTRACT:
A three chambered solenoid-actuated directional control valve in which a spool is reciprocally mounted for movement within a valve housing. The housing and spool define the three chambers with one adapted to be connected to a pump for supplying hydraulic fluid, the second adapted for connection to a first load and the third adapted to connection to a second load. A solenoid is reciprocally mounted for movement along the direction of the bore for actuating the spool with a rod fixedly mounted to the armature of the solenoid. At least one groove is formed between the outer surface of the armature and the inner bore of the valve housing for conducting flow of hydraulic fluid between a recess at the end of the solenoid adjacent the three chambers and the end remote therefrom. A throttle in the form of a single cross wall having either a groove or bore extending therethrough dampens movement of the armature to reduce pressure peaks during switching. Throttle grooves are also provided on the lands of the spool.

REFERENCES:
patent: 3701366 (1972-10-01), Tirelli et al.
patent: 3924655 (1975-12-01), Schwerin
patent: 4056119 (1977-11-01), Allen

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