Pressure equalizing valve

Details Pressure equalizing valve Pressure equalizing valve

1987-11-13

1989-10-31

Nilson, Robert G.

Fluid handling

Systems

Multi-way valve unit

137101, G05D 1103

Patent

active

048770574

ABSTRACT:
A pressure equalizing valve comprises a valve body with a longitudinally disposed bore therein, and a spool disposed in the bore for longitudinal movement to regulate fluid communication from an inlet port to outlet ports in response to a pressure differential between first and second sense ports disposed on first and second end faces of the valve body.

REFERENCES:
patent: 1925109 (1933-09-01), Olson
patent: 2140735 (1938-12-01), Clark
patent: 2643664 (1953-06-01), Willett
patent: 2707480 (1955-05-01), Klosse
patent: 2799995 (1957-07-01), Herman
patent: 2870776 (1959-01-01), Marsh
patent: 3047003 (1962-07-01), Gurney
patent: 3421533 (1969-01-01), Conn
patent: 3608587 (1971-09-01), Zbell
patent: 3618628 (1971-11-01), Kramer
patent: 3762443 (1973-10-01), Sorenson
patent: 3797525 (1974-03-01), Lieser
patent: 3979908 (1976-09-01), Alderson
patent: 4580590 (1986-04-01), Brinkel et al.

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