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:
Oct. 29, 2013
Filed:
Aug. 08, 2011
Masashi Sawada, Hitachi, JP;
Ayumu Morita, Hitachi, JP;
Masato Yabu, Hitachi, JP;
Motoki Shibuya, Hitachinaka, JP;
Masashi Sawada, Hitachi, JP;
Ayumu Morita, Hitachi, JP;
Masato Yabu, Hitachi, JP;
Motoki Shibuya, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An air circuit breaker comprises: a make-and-break unit having a stator and a blade-shaped movable element rotatably supported with a support shaft; an electromagnetic operation unit having a fixed iron core, a movable iron core provided below the fixed iron core, a coil to produce an electromagnetic force, and a permanent magnet; a capacitor to store electric power to excite the coil; a control circuit board that controls a carrying direction of a current supplied from the capacitor to the coil in response to an input command or a breaking command to the make-and-break unit; and a servo mechanism provided above the electromagnetic operation unit and connected to the movable iron core, that transmits a driving force from the electromagnetic operation unit to the make-and-break unit.