Fluid pressure controller

Details Fluid pressure controller Fluid pressure controller

1991-02-08

1992-07-07

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

13762565, 303119SV, F15B 13044

Patent

active

051274353

ABSTRACT:
A fluid pressure controller having a housing having a first port and a second port, and a spool axially slidably mounted in the housing. First and second chambers are defined between opposing ends of the spool between the spool and the housing. The controller further has an electricity/power converter for applying to the spool an axial driving force corresponding to the magnitude of an electric command, and a spring for holding the spool in its initial position when the value of the electric command to the converter is zero. A variable-size orifice is provided to separately control communications between the first chamber and the first port depending upon the axial position of the spool. The second chamber normally communicates with the second port. A fixed-size orifice and a relief valve are provided parallel to each other in passages connecting the first and second chambers.

REFERENCES:
patent: 5018797 (1991-05-01), Takata

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