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. 20, 2012
Filed:
May. 19, 2006
Eiichi Nagao, Tokyo, JP;
Makiko Kawada, Tokyo, JP;
Tadao Minagawa, Tokyo, JP;
Ei Tsuchie, Tokyo, JP;
Kyoichi Ohtsuka, Tokyo, JP;
Eiichi Nagao, Tokyo, JP;
Makiko Kawada, Tokyo, JP;
Tadao Minagawa, Tokyo, JP;
Ei Tsuchie, Tokyo, JP;
Kyoichi Ohtsuka, Tokyo, JP;
Mitsubishi Electric Corporation, Chiyoda-Ku, Tokyo, JP;
Abstract
In a gas insulated breaking device which accommodates open/close elements including a puffer cylinder which compresses an insulation gas and extinguishes an arc and a contact finger which has a slide contact portion which is brought into slide contact with a slide contact portion of the puffer cylinder in the inside of a vessel in which the insulation gas is sealed, a relatively soft plating film is formed on the slide contact portion of the puffer cylinder, and a relatively hard plating film is formed on the slide contact portion of the contact finger, and the silver plating film of each slide contact portion has an inner layer thereof formed of a soft film and an outer layer thereof which constitutes a surface portion formed of a hard film.