The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2017
Filed:
Dec. 23, 2014
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Hiroaki Yamada, Saitama, JP;
Takashi Yamaguchi, Saitama, JP;
NIHON DEMPA KOGYO CO., LTD., Tokyo, JP;
Abstract
A crystal resonator includes a blank and a supporting portion. The blank is cut out from a crystal parallel to a surface that includes a X″-axis and a Z″-axis respectively obtained by rotating an X'-axis and a Z′-axis by 45° around a Y′-axis in a direction from the Z′-axis toward the X′-axis. The X′-axis, the Y′-axis, and the Z′-axis are respectively obtained by rotating a crystallographic X-axis, Y-axis, and Z-axis of the crystal by equal to or more than +37° and equal to or less than 51.5° around the X-axis. The supporting portion is connected to an outer periphery of the blank at a position near an apex of the reference rectangle and where a displacement of vibration in the X″-axial direction or the Z″-axial direction becomes a local minimum when two longitudinal modes of vibration are coupled.