Pilot-operated valve with load pressure feedback

Details Pilot-operated valve with load pressure feedback Pilot-operated valve with load pressure feedback

1987-06-12

1988-05-03

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

1376256, F15B 13043

Patent

active

047413646

ABSTRACT:
A pilot-operated electrohydraulic valve has a pilot valve member exposed to load pressure via a load pressure feedback passage. Part of the pilot valve member forms a feedback valve which closes communication through the feedback passage upon a predetermined movement of the pilot valve so that the pilot valve can be fully opened without having to overcome the load pressure which would otherwise act on the pilot valve.

REFERENCES:
patent: 3384102 (1968-05-01), Hickox
patent: 4362088 (1982-12-01), Budzich
patent: 4494726 (1985-01-01), Kumar et al.
patent: 4576200 (1986-03-01), Janecke et al.
Cox, Craig, "Electronic Control of a Modulated Torque Converter", date unknown, but prior to applicants' invention.
Patel, Kishor, "Pulse-With Modulated Proportional Flow Control", 1984.
Jacobson, L. J., "Some Practical Considerations in the Application of Proportional Electro-Hydraulic Pilot Valves.

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