Spool spin prevention for hydraulic control valves

Details Spool spin prevention for hydraulic control valves Spool spin prevention for hydraulic control valves

1978-12-22

1980-12-09

Michalsky, Gerald A.

Valves and valve actuation

Reciprocating valve

Piston

13762565, 13762569, F15B 13044

Patent

active

042381126

ABSTRACT:
An improved hydraulic control valve having means for preventing rotational spinning of the spool caused by flow within the valve that impinges on the outer surfaces of the spool. A washer having a tang that abuts the valve body to prevent rotation is mounted on the flattened surface of a stem extending from the spool fixing the washer and spool against relative rotation but allowing axial displacements therebetween. A second embodiment provides a pin, one end of which extends through an eccentric hole in a washer similarly mounted on the valve stems but lacking the tang. The pin is fixed at one end to a non-rotating member or to the valve body. An alternate configuration has a rectangular slot formed in the valve stem parallel to its longitudinal axis, into which slot a diametrically disposed pin mounted at each end in a non-rotating part is fitted to prevent spool rotation.

REFERENCES:
patent: 3771564 (1973-11-01), Bianchetta et al.
patent: 4133510 (1979-01-01), Lorimor

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