Pressure gauge construction

Details Pressure gauge construction Pressure gauge construction

1979-04-30

1980-04-08

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Bourdon

73740, 73431, G01L 1906

Patent

active

041966333

ABSTRACT:
Excess pressure being supplied to a pressure gauge is controllably relieved through the gauge cavity and an unsealed aperture in a spring-like crystal. A sleeve member extends transversely in a forced engagement between the inside face of the crystal and an annular gasket compressed in surrounding relation about the inlet of the Bourdon tube. The gasket normally seals the passage clearance about the tube inlet against supply pressure leakage therepast but in response to an overpressure is displaced inwardly toward the cavity until leakage can occur. Concomitant displacement of the sleeve member deflects the crystal outwardly a like amount afforded by its spring rate matched in correlation with the maximum anticipated overpressure to be provided for.

REFERENCES:
patent: 3630089 (1971-12-01), Bissell
patent: 3795148 (1974-03-01), Luich
patent: 3952598 (1976-04-01), Ferguson

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