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:
Sep. 12, 1989
Filed:
Jul. 11, 1988
Applicant:
Inventors:
Fumiyuki Hisatsune, Hiroshima, JP;
Hiroshi Fujii, Hiroshima, JP;
Shinji Yamagata, Hiroshima, JP;
Yoshiaki Kobayashi, Hiroshima, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
2001 / ; 2001 / ;
Abstract
In a circuit breaker, an arc is produced between a pair of switchable contact members when these contact members are opened due to overcurrent. An arc extinguishing apparatus is employed to extinguish an arc produced between the opened contact members. The arc extinguishing apparatus includes a plurality of U-shaped metal arc extinguishing plates which are stacked, and a pair of insulating plates made of a synthetic resin. These insulating plates are mounted on both inside surfaces of leg portions of the extinguishing plates.