Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1990-03-29
1991-01-08
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Diaphragm
73115, 73746, 338 42, G01L 708, G01L 902
Patent
active
049826077
ABSTRACT:
An improved pressure transducer to measure and indicate fluid pressure levels including a housing in which a piston assembly is movable in response to pressure changes, the housing being of a composite material of metal and plastic and having grooves therein, the piston having bosses formed thereon to be engaged within the grooves of the housing to prevent rotation of the piston. The transducer is also designed to facilitate grounding of an electrical contact assembly located within the housing. The external portion of the housing may be formed in a hexagonl shape to facilitate installation and removal of the unit.
REFERENCES:
patent: 3321594 (1967-05-01), Reise et al.
patent: 3504324 (1970-03-01), Creager
patent: 4255630 (1981-03-01), Hire et al.
patent: 4449112 (1984-05-01), Gould
patent: 4452202 (1984-06-01), Meyer
patent: 4524255 (1985-06-01), Haag
patent: 4581941 (1986-04-01), Obermann et al.
patent: 4805460 (1989-02-01), Betterton et al.
patent: 4807478 (1989-02-01), Betterton et al.
Betterton Joseph T.
Glover Alfred H.
McKee Thomas S.
Acustar, Inc.
MacLean, Jr. Kenneth H.
Woodiel Donald O.
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