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:
Jun. 24, 2014
Filed:
Oct. 31, 2012
Masaru Isozaki, Ichihara, JP;
Osamu Kashimura, Hino, JP;
Hiroyuki Tachikawa, Yokohama, JP;
Kouetsu Takaya, Kounosu, JP;
Yasuhiro Naka, Kounosu, JP;
Yuji Shiba, Kounosu, JP;
Masaru Isozaki, Ichihara, JP;
Osamu Kashimura, Hino, JP;
Hiroyuki Tachikawa, Yokohama, JP;
Kouetsu Takaya, Kounosu, JP;
Yasuhiro Naka, Kounosu, JP;
Yuji Shiba, Kounosu, JP;
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Fuji Electric FA Components & Systems Co., Ltd., Tokyo, JP;
Abstract
An electromagnetic contactor has a contact device including a contact housing for housing a pair of fixed contact pieces and a movable contact piece disposed to contact with and separate away from the pair of fixed contact pieces, a pair of arc-extinguishing inner permanent magnets disposed on inner peripheral surfaces of the contact housing, and a pair of arc-extinguishing outer permanent magnets disposed on outer peripheral surfaces of the contact housing at a section facing the arc-extinguishing inner permanent magnets. Magnetic pole surfaces of the arc-extinguishing inner permanent magnets are arranged in a close vicinity of the movable contact piece and are magnetized to have the same polarity facing each other. The arc-extinguishing outer permanent magnets are magnetized in the same direction as the arc-extinguishing inner permanent magnets disposed nearby and coercive force of the arc-extinguishing outer permanent magnets is greater than of that the arc-extinguishing inner permanent magnets.