Logic valve

Details Logic valve Logic valve

1990-06-13

1991-03-05

Michalsky, Gerald A.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

91461, 251 38, F16K 31383

Patent

active

049971590

ABSTRACT:
A main poppet body of a logic valve receives inlet pressure at first and second ends. A flow-restricting orifice between the first and second ends produces a differential pressure between the two ends when inlet fluid is permitted to flow from the second end. The main poppet body is normally resiliently seated against a seat. A pilot poppet body, movable in the main poppet body, seats against a seat in the main poppet body. The pilot poppet body, when sealed to its seat, seals the fluid at the second end of the main poppet body from flowing. Thus, equal pressures exist at opposed ends of the main poppet body, and the main poppet body remains in its sealing position. An external source of controllable pilot pressure acts on the pilot poppet body to unseal it from its seat. This permits a flow of inlet fluid from the second end of the main poppet body, and produces a pressure reduction at the second end. The differential pressure between the first and second ends of the main poppet body tends to move the main poppet body out of its sealing position, and consequently to permit an inlet flow past the seat of the main poppet body. This inlet fluid flows to a drain. The position of the main poppet body varies in substantially linear relationship to the pilot pressure applied to the pilot poppet body.

REFERENCES:
patent: 2805038 (1957-09-01), Towler et al.

Affiliated with

Also associated with

Rating

Logic valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Logic valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Logic valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-491700