Measuring and testing – Fluid pressure gauge – Bourdon
Patent
1979-02-16
1980-03-11
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Bourdon
73741, G01L 704
Patent
active
041921933
ABSTRACT:
A pressure gauge has a Bourdon tube element and a pointer mechanism supported on an inner support member which is substantially contained inside the case body of the gauge. The inner support member has a bore in communication with the inner space of the Bourdon tube. The case body has a flattened, outwardly projecting wall zone surrounding a first aperture. An end surface of the inner support member has a contour adapted to the contour of the case wall zone. The matching contours serve to position the inner support member and an outer connection member threads into the inner support member to hold it tightly in place. Seals are provided between the inner support and outer connection members and between the outer connection members and the case body. An air cushion sits on top of the dampening fluid. The air cushion is vented through a vent plug having a longitudinal bore that is terminated by a cross hole transverse to the bore. The vent plug is slidably supported by a grommet that seals a second aperture above the air cushion. When the vent plug is raised, the cross hole is closed off.
REFERENCES:
patent: 1494496 (1924-05-01), Manning
patent: 2384928 (1945-09-01), Kahn
patent: 3293917 (1966-12-01), van der Heyden
patent: 3701284 (1972-10-01), DeMeyer
patent: 3776041 (1973-12-01), Wetterhorn
patent: 3874241 (1975-04-01), Harland et al.
patent: 3888127 (1975-06-01), Shamlian et al.
patent: 3921455 (1975-11-01), Staubli et al.
patent: 3929020 (1975-12-01), Honkanen
patent: 4154116 (1979-05-01), Stahn et al.
FitzGerald Thomas R.
General Signal Corporation
Woodiel Donald O.
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