Piezoelectric capsule with flat supporting surface and resilient

Details Piezoelectric capsule with flat supporting surface and resilient Piezoelectric capsule with flat supporting surface and resilient

1990-02-23

1990-12-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

381190, H01L 4108

Patent

active

049788809

ABSTRACT:
A piezoelectric capsule with flat supporting surface and resilient holding means is disclosed, comprising a hollow metal lid (8) fitted on a base body (7) formed of a printed circuit, and a piezoelectric membrane (1) applied against a front step (17) of the lid (8). The resilient holding means (22), fixed to the base body (7), bear on the central zone of the rear face (5) of the membrane (1). The resilient means (22) hodl the membrane (1) mechanically in position and simultaneously provide peripheral sealing by the fact that the corresponding surfaces of the front step (17) and of the membrane (1) are perfectly flat.

REFERENCES:
patent: 4230383 (1980-10-01), Burnstein et al.
patent: 4295009 (1981-10-01), Weidler
patent: 4420706 (1983-12-01), Siebold et al.
patent: 4429247 (1984-01-01), Feldman
Sounder Unit, by Baumhauer, Jr. et al., Western Electric Tech. Digest, No. 59, Jul. 1980, p. 1.
Patent Abstracts of Japan, vol. 10, No. 46, (E-383), [2103], Feb. 22, 1986.
Patent Abstracts of Japan, vol. 10, No. 184, (E-415) [2240], Jun. 27, 1986.

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