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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.:

US 10284143 B1

PDFFull Text
Date of Patent:
May. 07, 2019

Filed:

Dec. 13, 2016

Quartz crystal unit, quartz crystal oscillator and electronic apparatus

Applicant:

Piedek Technical Laboratory, Tokyo, JP;

Inventor:

Hirofumi Kawashima, Tokyo, JP;

Assignee:

PIEDEK TECHNICAL LABORATORY, , JP;

Attorney:

Adams & Wilks

Primary Examiner:

Barbara Summons

Int. Cl.
CPC ...
H03H 9/21 (2006.01); H03B 5/32 (2006.01); H03H 9/10 (2006.01); H03H 9/05 (2006.01); H03H 9/215 (2006.01); H03B 5/04 (2006.01); H03H 9/02 (2006.01); H03H 3/02 (2006.01); H03H 3/04 (2006.01);
U.S. Cl.
CPC ...
H03B 5/32 (2013.01); H03B 5/04 (2013.01); H03H 9/02023 (2013.01); H03H 9/0547 (2013.01); H03H 9/1021 (2013.01); H03H 9/215 (2013.01); H03H 3/02 (2013.01); H03H 2003/026 (2013.01); H03H 2003/0492 (2013.01); Y10T 29/42 (2015.01); Y10T 29/49005 (2015.01); Y10T 29/49007 (2015.01); Y10T 29/4908 (2015.01); Y10T 29/49128 (2015.01); Y10T 29/49133 (2015.01); Y10T 29/49135 (2015.01);
Abstract

In a quartz crystal unit, the unit comprising a quartz crystal tuning fork resonator having a quartz crystal tuning fork base, and first and second quartz crystal tuning fork tines, each of the first and second quartz crystal tuning fork tines having a first vibrational portion including a first width and a second vibrational portion including a second width greater than the first width, at least one groove being formed in at least one of opposite main surfaces of the first vibrational portion of each quartz crystal tuning fork tine, the first width of the first vibrational portion of each quartz crystal tuning fork tine being greater than 0.03 mm and less than 0.075 mm and the second width of the second vibrational portion of each quartz crystal tuning fork tine being greater than 0.04 mm and less than 0.23 mm.

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