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:
Feb. 08, 2005
Filed:
Sep. 24, 2002
Shinichi Sato, Tokyo, JP;
Yoshio Okamoto, Tokyo, JP;
Shigemitsu Aoki, Tokyo, JP;
Keiji Ikeda, Tokyo, JP;
Masato Morimuta, Tokyo, JP;
Shinichi Sato, Tokyo, JP;
Yoshio Okamoto, Tokyo, JP;
Shigemitsu Aoki, Tokyo, JP;
Keiji Ikeda, Tokyo, JP;
Masato Morimuta, Tokyo, JP;
Fujitsu Takamisawa Component Ltd., Tokyo, JP;
Abstract
The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.