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. 11, 1997
Filed:
Oct. 23, 1995
Eisaku Mizufune, Hitachi, JP;
Kenichi Natsui, Hitachi, JP;
Yukio Kurosawa, Hitachi, JP;
Goro Daimon, Hitachi, JP;
Yoshihito Asai, Hitachi, JP;
Katsuichi Kashimura, Takahagi, JP;
Osamu Koyanagi, Hitachi, JP;
Kogi Ishikawa, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A compression gas puffer type circuit breaker has a magnetic body surrounding a conductor between a stationary arc contact and a main bus conductor. The magnetic body is protected from being exposed to heated puffer gas generated when a movable arc contact is separated from the stationary arc contact by disposing an insulator partition plate supporting the conductor at the downstream end of a cylindrical contact base carrying a main stationary contact and upstream of the magnetic body. Conductors are disposed around the magnetic body so as to increase flux linkage with the magnetic body when an arcing current flows through the conductor during a circuit breaking operation.