Fluid pressure controller

Details Fluid pressure controller Fluid pressure controller

1991-02-08

1992-05-05

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

13762565, 303119SV, F15B 13044

Patent

active

051098865

ABSTRACT:
A fluid pressure controller has a houisng including an input port, a discharge port and an output port, and a spool is axially slidably mounted in the housing. First and second chambers are defined at opposing ends of the spool by the spool and the housing. Ring valve members are mounted on the spool at axial spaced locations to define oppositely oriented variable-size orifices for pressure increase and pressure reduction. They are adapted to separately control communications between the first chamber and the input port and between the first chamber and the discharge port depending upon the axial position of the spool and to close both communications when the spool is in its closed position. Thus the pressure controller can be freely changed between providing pressure increase, pressure reduction and pressure hold.

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

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