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:
May. 28, 2019
Filed:
Mar. 01, 2016
Citizen Watch Co., Ltd., Nishitokyo-shi, Tokyo, JP;
CITIZEN WATCH CO., LTD., Nishitokyo-Shi, Tokyo, JP;
Abstract
A power transmission body of a timepiece in which a fixed portion between an arbor and a power transmission member is hardly damaged is provided without increasing the number of components. A transmission wheel (one example of power transmission body) includes a gear and a pinion (one example of arbor). A hole formed in a center portion of the gear includes a regular octagon with a rotation center as a center. An insertion portion formed in the pinion includes a gear-like portion including a tooth bottom and a tooth tip. The hole includes eight portions that are positioned in a circumference direction about the rotation center and contact the insertion portion. The hole includes a portion that is positioned in front of the eight portions in a clockwise direction (specific rotation direction) about the rotation center and has a distance from the rotation center longer than a distance from the rotation center to each of the eight portions.