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:
Aug. 20, 2002
Filed:
Nov. 10, 1998
Shigeru Kikuchi, Ibaraki-ken, JP;
Masato Kobayashi, Hitachi, JP;
Katsuhiro Komuro, Hitachi, JP;
Toru Tanimizu, Hitachi, JP;
Yoshimi Hakamata, Hitachi, JP;
Kathumi Kuroda, Hitachi, JP;
Hitoshi Okabe, Hitachi, JP;
Noboru Baba, Hitachiota, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention aims at providing a vacuum circuit-breaker, a vacuum valve used therein and electrodes for the vacuum valve, which can reduce the manufacturing cost while being of high performance and compact in size. The invention resides in a vacuum circuit-breaker, a vacuum valve and electrodes for the vacuum valve, which are characterized in that fixed and movable electrodes each comprise arc electrodes, whose entire surfaces, mutually facing each other, are made of an alloy containing a refractory metal and a highly conductive metal, and electrode rods of a highly conductive metal supporting the respective arc electrodes, and that each arc electrode and the mating electrode rod are integrally formed by means of solid-phase diffusion bonding.