Quartz resonator of small dimensions

Details Quartz resonator of small dimensions Quartz resonator of small dimensions

2007-08-07

2007-08-07

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

10982790

ABSTRACT:
The invention concerns a piezoelectric resonator (10), intended to be packaged in a case, including a base (12) formed of a first fixing zone (121), a second central mechanical uncoupling zone (122) and a third zone (123) opposite to the first fixing zone. At least two vibrating arms (13a, 13b) extend from said third zone, on each of which at least one groove (141a-144a, 141b-144b) is formed on at least one of the top or bottom faces of the arms. The resonator is characterised in that the base is provided with a hole (15) through the second central mechanical uncoupling zone.

REFERENCES:
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patent: 6346765 (2002-02-01), Kikuchi et al.
patent: 6587009 (2003-07-01), Kitamura et al.
patent: 6651498 (2003-11-01), Kikuchi et al.
patent: 2002/0089386 (2002-07-01), Kitamura et al.
patent: 2 467 487 (1981-04-01), None
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patent: 2005-291937 (2005-10-01), None
Patent Abstracts of Japan, vol. 002, No. 096 (E-048), Aug. 11, 1978, & JP 53 060594, (Seiko Epson Corp.), May 31, 1978.
Patent Abstracts of Japan, vol. 007, No. 154, Jul. 6, 1983 & JP 58 062917, (Daini Seikosha KK), Apr. 14, 1983.
Patent Abstracts of Japan, vol. 005, No. 040, Mar. 17, 1981 & JP 55 162612 (Citizen Watch Co, Ltd.) Dec. 18, 1980.

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