Temperature compensated differential pressure indicating device

Details Temperature compensated differential pressure indicating device Temperature compensated differential pressure indicating device

1981-02-09

1984-01-24

Woodiel, Donald O.

Signals and indicators

Indicators

Fluid flow

73 38, 73708, 116268, G01L 914

Patent

active

044269528

ABSTRACT:
A differential pressure indicating device which is temperature compensated and includes a piston responsive to a pressure differential between inlet and outlet pressures. The piston is retained in a normal or first position by the force of a spring holding mechanism. The spring holding mechanism releases the piston at a predetermined excessive differential pressure condition to a second position. As this occurs, the piston actuates an indicating member to an indicating condition. A temperature sensitive bimetallic strip is provided to permit the piston to move to the second condition without activating the indicator member when the temperature of the fluid is below a predetermined temperature.

REFERENCES:
patent: 2942572 (1960-06-01), Pall
patent: 3140690 (1964-07-01), Siebel
patent: 3386410 (1968-06-01), Barnes, Jr.
patent: 3402690 (1968-09-01), Willis
patent: 3812816 (1974-05-01), Juhasz
patent: 4172971 (1979-10-01), Silverwater

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