Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1991-08-13
1993-06-01
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Diaphragm
73721, 73727, 73756, 92103SD, 338 4, 361283, G01L 708
Patent
active
052149617
ABSTRACT:
A pressure sensor having a ceramic support, a first ceramic layer attached to a peripheral portion of one side of the ceramic support, and a second ceramic layer which is attached to a peripheral portion of another side of the ceramic support such that the pressure sensor is shaped as an integral assembly. The ratio of the thickness of the first ceramic layer to that of the second ceramic layer is in the range of 1:10 to 1:1. The ratio of the thicknesses of the first and second ceramic layers to thickness of the ceramic support is no more than 1:2. The pressure sensor further includes a hollow space formed between the ceramic support and at least one of the first and second ceramic layers so that, after shaping as an integral assembly, the ceramic layer or layers will work as a diaphragm that is capable of deformation under pressure.
REFERENCES:
patent: 4864271 (1989-09-01), Yajima
patent: 4894635 (1990-01-01), Yajima et al.
SAE Report 860474, "High Pressure Thick Film Monolithic Sensors", by Roberto Dell 'Acqua, and Giuseppe Dell'Orto of Marelli Autronica S.p.A. Pravia(Italy), pp. 79-87.
Kitsukawa Kanehisa
Kojima Takao
Mizumoto Katsuyoshi
Yasuda Toshikatsu
NGK Spark Plug Co. Ltd.
Woodiel Donald O.
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