Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1989-06-15
1991-06-25
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Diaphragm
73718, 92103M, 200 83P, 361283, G01L 708, G01L 912
Patent
active
050256670
ABSTRACT:
A pressure sensing element having a housing including a flexible membrane receiving portion, a flexible disc member of predetermined shape secured within the housing, and a flexible membrane disposed within the housing, the flexible membrane being substantially more flexible than the disc member, the membrane having an outer portion hermetically secured to the membrane receiving portion, a central portion impinging against the disc member and conforming to the shape thereof and an intermediate unsupported portion joining the interior portion of the outer portion and the exterior portion of the central portion. The hermetically sealed diaphragm is obtained by providing a diaphragm capable of deforming to a fixed shape, hermetically securing the edge portion of the diaphragm to a securing member, and then forcing a central portion of the diaphragm under sufficient pressure against a surface of predetermined shape and more rigid than the diaphragm to cause the central portion of the diaphragm to conform to the shape of the surface and provide an unwrinkled planar central diaphragm.
REFERENCES:
patent: 1143338 (1915-06-01), Wesener
patent: 1611659 (1926-12-01), Malivert
patent: 1960466 (1934-05-01), Thrall
patent: 3302269 (1967-02-01), Cooper et al.
patent: 3585328 (1971-06-01), Fiore
patent: 4145588 (1979-03-01), Orcutt
patent: 4488343 (1984-12-01), Scott et al.
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
Woodiel Donald O.
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