Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-10-02
2009-10-27
Dougherty, Thomas M (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S346000, C310S361000
Reexamination Certificate
active
07608986
ABSTRACT:
A quartz crystal resonator includes a quartz crystal resonator element having a main surface including an X axis (electrical axis) and a Z′ axis of an inclination rotated at an angle (y) equal to or greater than 36.4 degrees and equal to or smaller than, 40.5 degrees from a Z axis (optical axis) around the X axis, a main vibrating portion vibrating at a predetermined resonance frequency (f) and a supporting portion integrally formed with the main vibrating portion in such a manner as to be formed peripherally to surround the main vibrating portion, and two covers having a thermal expansion coefficient equal to or greater than 6×10−6per degrees centigrade and equal to or smaller than 10×10−6per degrees centigrade and bonded to the supporting portion so as to sandwich the quartz crystal resonator element therebetween.
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Patel Mihir S
Tanaka Masako
Yong Yook-Kong
Dougherty Thomas M
Oliff & Berridg,e PLC
Rutgers State University of New Jersey
Seiko Epson Corporation
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