Monitor for testing the operating condition of a nonreturn valve

Details Monitor for testing the operating condition of a nonreturn valve Monitor for testing the operating condition of a nonreturn valve

1987-10-30

1989-05-30

Shoop, Jr., William M.

Measuring and testing

Blower, pump, and hydraulic equipment

137554, 25112911, 25112912, G01M 1900

Patent

active

048339164

ABSTRACT:
Apparatus for monitoring displacement of a translational member in a pressurized vessel. In one form, the apparatus comprises first and second fluid containing compressible bellows each coupled to a differential pressure gauge in order to measure pressure fluctuations between the bellows. An end portion of the first bellows is coupled to the translational member in order to receive a variable compressive force as the member is displaced. The displacement of the translational member is determined as a function of the pressure variation between the first and second bellows.

REFERENCES:
patent: 3098382 (1963-07-01), Hoffman et al.
patent: 4029122 (1977-06-01), Jaegtnes
patent: 4274438 (1981-06-01), La Coste
patent: 4425789 (1984-01-01), Andreev et al.
patent: 4542649 (1985-09-01), Charbonneav et al.
patent: 4545406 (1985-10-01), King
patent: 4570903 (1986-02-01), Crass
patent: 4694390 (1987-09-01), Lee

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