Differential pressure indicators

Details Differential pressure indicators Differential pressure indicators

1976-04-30

1977-03-29

Woodiel, Donald O.

Signals and indicators

Alarms

Fluid flow

73419, 116DIG42, G01L 716

Patent

active

040142841

ABSTRACT:
A differential pressure indicator for indicating the degree of contamination of a filter element, has a piston movable against a spring by increasing differential pressure and the piston is connected through a helical constraint to turn a magnetic element as the piston moves. An indicator element is located on the opposite side of a wall from the magnetic element and is magnetically coupled to it and is thereby turned by the first element as the latter turns.

REFERENCES:
patent: 3429291 (1969-02-01), Hoffmann
patent: 3464556 (1969-09-01), Cullen

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