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. 18, 2012
Filed:
Feb. 17, 2010
Applicants:
Noriaki Munakata, Hitachi, JP;
Masato Suzuki, Hitachi, JP;
Yoshihiko Matsuda, Hitachiota, JP;
Naoki Kawamura, Hitachinaka, JP;
Manaba Takamoto, Hitachi, JP;
Inventors:
Noriaki Munakata, Hitachi, JP;
Masato Suzuki, Hitachi, JP;
Yoshihiko Matsuda, Hitachiota, JP;
Naoki Kawamura, Hitachinaka, JP;
Manaba Takamoto, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/00 (2006.01); H02H 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A commutation type DC breaker comprising a main switch inserted in series into a main circuit for connecting a DC source and a load, a commutation capacitor, a reactor, and a commutation switch for supplying charges stored in the commutation capacitor to the main switch in an opposite direction to a main circuit current, producing a current zero point, thereby breaking the main switch,