Electromagnetic proportional pressure control valve

Details Electromagnetic proportional pressure control valve Electromagnetic proportional pressure control valve

1989-11-16

1990-11-20

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

251337, F15B 13044

Patent

active

049711148

ABSTRACT:
An electromagnetic proportional pressure control valve includes a housing, and a spool slidably received in the housing. The spool has a pair of first and second pressure receiving portions which are equal to each other in effective pressure receiving area. A primary pressure in a primary port is applied to the first pressure receiving portion, and a secondary pressure in a secondary port is applied to the second pressure receiving portion. A form due to the primary pressure acts on the spool in a direction to increase the secondary pressure, and a force due to the secondary pressure acts on the spool in a direction to decrease the secondary pressure. A force of a spring and a force of an electromagnetic actuator also act on the spool in the opposite directions. A variation in the primary pressure directly appears in the secondary pressure.

REFERENCES:
patent: 3880476 (1975-04-01), Belart et al.
patent: 4763872 (1988-08-01), Ichihashi et al.
patent: 4809749 (1989-03-01), Ichihashi
patent: 4860792 (1989-08-01), Ichihashi et al.

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