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:
Nov. 29, 2016
Filed:
Oct. 03, 2014
Fuji Electric Fa Components & Systems Co., Ltd., Chuo-ku, Tokyo, JP;
Fuji Electric Co., Ltd., Kawasaki-shi, Kanagawa, JP;
Osamu Kashimura, Hino, JP;
Masaru Isozaki, Ichihara, JP;
Kouetsu Takaya, Kounosu, JP;
Yuji Shiba, Kounosu, JP;
FUJI ELECTRIC FA COMPONENTS & SYSTEMS CO., LTD., Tokyo, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;
Abstract
A contact device includes a pair of fixed contacts fixedly disposed inside an arc extinguishing chamber and maintaining a predetermined interval from each other; a movable contact disposed to contact to and separate from the pair of fixed contacts; and an arc root movement promotion portion formed on the movable contact to promote a movement of root of arc in a direction away from the fixed contacts. The root of arc is generated when the movable contacts are opened and separated from the pair of fixed contacts.