Pressure equalizing valve

Details Pressure equalizing valve Pressure equalizing valve

1978-08-04

1980-05-20

Weakley, Harold W.

Fluid handling

With indicator, register, recorder, alarm or inspection means

Fluid pressure responsive indicator, recorder or alarm

137227, 137510, 152415, 731468, E03B 707

Patent

active

042034671

ABSTRACT:
A pressure equalizing valve featuring a housing defining a chamber, the housing having first and second passages therethrough opening into the chamber; a valve seat in the chamber surrounding the opening of the second passage thereinto; a diaphragm having its periphery sealed to the housing and forming a wall of the chamber adjacent to the valve seat; resilient means on the side of the diaphragm opposite the valve seat for urging the diaphragm against the seat with a predetermined force, to seal the second passage from the chamber, and hence from the first passage; and an indicator mounted on the housing and having a pressure responsive portion in communication with the chamber for indicating when the air pressure therein is below a predetermined value just sufficient to overcome the predetermined force and unseal the second passage.

REFERENCES:
patent: 347516 (1886-08-01), Sargent
patent: 1290030 (1919-01-01), Acebal
patent: 1483701 (1924-02-01), Weber
patent: 2314965 (1943-03-01), Sautu
patent: 2789617 (1957-04-01), Cardi
patent: 3079974 (1963-03-01), Cardi
patent: 3799037 (1974-03-01), Schmidt
patent: 4058009 (1977-11-01), Etter-Felix

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