Automatic two-position four-way pulsating valve

Details Automatic two-position four-way pulsating valve Automatic two-position four-way pulsating valve

1991-03-07

1992-12-29

Michalsky, Gerald A.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

91306, 91312, 91318, F15B 13042

Patent

active

051743221

ABSTRACT:
A four-way hydraulic control valve automatically reverses flow of hydraulic fluid to a double acting hydraulic cylinder or to a reversible hydraulic motor when a substantial resistance to fluid flow is encountered, such as when the cylinder or a machine being operated by the cylinder or motor reaches a mechanical limit of its motion. The valve has a reciprocating spool in a valve body with two internal control valves, one at each end, and with appropriate internal pressure shunts for directing high pressure fluid into the control valves and drain fluid restrictions to shuttle the spool back and forth in response to an increase in pressure resulting from a substantial resistance to fluid flow.

REFERENCES:
patent: 551366 (1895-12-01), Cornwall
patent: 4449896 (1984-05-01), Klepper et al.

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