Electrical resistors – Strain gauge type – Fluid- or gas pressure-actuated
Patent
1987-02-10
1988-11-01
Shaw, Clifford C.
Electrical resistors
Strain gauge type
Fluid- or gas pressure-actuated
338 5, 338 42, 338 47, G01L 122
Patent
active
047823194
ABSTRACT:
The sensor includes a rigid support and a diaphragm having a peripheral portion fixed by a layer of glue to the support. The central portion of the diaphragm is spaced from the support and, on its surface facing the support, carries at least one thick-film resistor acting as a piezo-resistive transducer. The diaphragm can deform resiliently towards the support when a pressure is exerted on its other surface. The surface of the support which is connected to the diaphragm is flat, and the layer of glue has a calibrated thickness such that the distance between the diaphragm and the surface of the support at rest is substantially equal to the deflection of the diaphragm corresponding to a predetermined maximum pressure measured.
REFERENCES:
patent: 3341794 (1967-09-01), Stedman
patent: 3455165 (1969-07-01), Hut
patent: 4382247 (1983-05-01), Stecher et al.
Dell'Acqua Roberto
Dell'Orto Giuseppe
Dendi Gilberto
Lateef M. M.
Marelli Autronica S.p.A.
Shaw Clifford C.
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