Pressure loss indicator

Details Pressure loss indicator Pressure loss indicator

1985-08-12

1986-11-04

Frankfort, Charles

Signals and indicators

Indicators

Fluid flow

116215, 169 75, 239 71, G01L 1912

Patent

active

046205004

ABSTRACT:
A pressure loss indicator employs a diaphragm which assumes one of two stable convex configured states in accordance with the pressure differential across the diaphragm. A trigger is responsive to the state of the diaphragm to release an indicator pin from the assembly upon occurrence of a reduction in the ambient pressure which results in a pressure differential across the diaphragm. A reference pressure is established in a reference chamber at one side of the diaphragm, the reference chamber being selectively isolated from the ambient pressure by a check valve.

REFERENCES:
patent: 2477725 (1949-08-01), Dall
patent: 3492968 (1970-02-01), Workman, Jr.
patent: 3717861 (1973-02-01), Wright, Jr.
patent: 3760350 (1973-09-01), Johnson
patent: 3939316 (1976-02-01), Stropkay
patent: 4049935 (1977-09-01), Gruber

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