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. 16, 2001
Filed:
Aug. 23, 1999
Applicant:
Inventors:
Atsushi Yamamoto, Kunitachi, JP;
Takashi Kusano, Itabashi-ku, JP;
Tsutomu Okutomi, Yokohama, JP;
Tsuneyo Seki, Hachioji, JP;
Makoto Kataoka, Fuchu, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B22F 3/26 ;
U.S. Cl.
CPC ...
B22F 3/26 ;
Abstract
A contact material for forming a contact included in a vacuum interrupter comprises 50 to 70% by weight of a conductive material containing Cu as a principal component, an arc-proof material containing at least either TiC or VC and having a mean particle diameter of 8 &mgr;m or below, and 0.2 to 2.0% by weight of Cr on the basis of the sum of the respective amounts of Cr and Cu or 0.2 to 2/0% by weight of Zr on the basis of the sum of the respective amounts of Zr and Cu. The contact material has a hydrogen content in the range of 0.2 to 50 ppm.