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:
Mar. 04, 2008
Filed:
Dec. 06, 2005
Hajime Urai, Hitachi, JP;
Youichi Ohshita, Hitachinaka, JP;
Makoto Koizumi, Naka, JP;
Naoki Osawa, Hitachi, JP;
Hiroaki Hashimoto, Kasumigaura, JP;
Junzo Kida, Hitachi, JP;
Hajime Urai, Hitachi, JP;
Youichi Ohshita, Hitachinaka, JP;
Makoto Koizumi, Naka, JP;
Naoki Osawa, Hitachi, JP;
Hiroaki Hashimoto, Kasumigaura, JP;
Junzo Kida, Hitachi, JP;
Japan AE Power Systems Corporation, Tokyo, JP;
Abstract
A puffer type gas circuit breaker has a piston, which is connected with a center shaft via a link mechanism. At an initial stage of an interruption operation, the link mechanism drives a puffer cylinder and the piston both in an interruption direction while maintaining an almost constant distance therebetween. Even when a pressure rise occurs in a compression chamber by the heat of an arc generated in accordance with opening between a fixed arc contact and a movable arc contact, the pressure rise does not become an operation counterforce to an operator. At a final stage of the interruption operation where the fixed arc contact is removed from a throat of an insulating nozzle, the link mechanism drives the piston in an almost stopped status.