Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1981-10-06
1982-09-07
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Diaphragm
73706, G01L 906
Patent
active
043477453
ABSTRACT:
An apparatus which utilizes solid state piezoresistive strain sensing means to measure the static pressure as well as the differential pressure across a primary element, such as an orifice plate, venturi tube, nozzle or wedge. In a preferred embodiment, the apparatus includes a dual pressure sensing transducer comprising a body, means for applying two different pressures to the body, first and second pressure diaphragms respectively, hermetically sealed to the body at first and second spaced apart portions of the body with a back wall of the second diaphragm forming one wall of a chamber which contains a desired reference pressure, a compliant cantilever beam fixedly mounted at one end thereof to the body, a strut wire coupled between the beam and the first diaphragm to cause deflection of the beam in response to movement of the first diaphragm due to an applied differential pressure, a first plurality of piezoresistive strain elements contained on a thinned portion of the beam, a second plurality of piezoresistive strain elements contained on a front wall of the second diaphragm.
REFERENCES:
patent: 2677963 (1954-05-01), Mullins, Jr. et al.
patent: 2694927 (1954-11-01), Coulbourn et al.
patent: 2869367 (1959-01-01), Moore
patent: 3303451 (1967-02-01), Yuan
patent: 3343420 (1967-09-01), Kondo et al.
patent: 3638481 (1972-02-01), Wilner
patent: 3683698 (1972-08-01), Tomanec et al.
patent: 3780588 (1973-12-01), Whitehead, Jr. et al.
patent: 3820401 (1974-06-01), Lewis
patent: 3894435 (1975-07-01), Shimada et al.
patent: 4034610 (1977-07-01), Biddle et al.
patent: 4135408 (1979-01-01), Di Giovanni
patent: 4157032 (1979-06-01), Schaberg
patent: 4161887 (1979-07-01), Stone et al.
patent: 4172388 (1979-10-01), Gabrielson
patent: 4182188 (1980-01-01), Britton et al.
patent: 4203327 (1980-05-01), Singh
patent: 4212209 (1980-07-01), Newbold et al.
patent: 4221134 (1980-09-01), Ekstrom, Jr.
Becker William G.
Bourns Instruments, Inc.
Klein Howard J.
Woodiel Donald O.
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