Variable force solenoid operated valve assembly with dampener

Details Variable force solenoid operated valve assembly with dampener Variable force solenoid operated valve assembly with dampener

1997-04-30

1998-12-29

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

251 50, 25112918, 335237, F15B 13044

Patent

active

058530282

ABSTRACT:
A variable force solenoid operated pressure control valve of the type having a force balanced spool moveably controlled energization of the solenoid for modulating the discharge pressure of the valve at its control outlet when the valve is supplied at its inlet with fluid of a supply pressure. The spool is moved to bleed fluid through an exhaust port to a sump for controlling the pressure supplied to the control outlet. The spool has a dashpot and piston in one end for providing hydraulic dampening of spool oscillations. In one embodiment a cylindrical piston is used and in an alternate arrangement a ball is employed in the dashpot.

REFERENCES:
patent: 4610428 (1986-09-01), Fox
patent: 4643225 (1987-02-01), Imhof
patent: 4669504 (1987-06-01), Fujitsugu et al.
patent: 4947893 (1990-08-01), Miller et al.
patent: 5191827 (1993-03-01), Kervagoret
patent: 5513673 (1996-05-01), Slavin et al.
patent: 5571248 (1996-11-01), Seetharaman et al.
patent: 5577534 (1996-11-01), Ward

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