Invention Grant
- Patent Title: Electrical contacts for vacuum circuit breakers and methods of manufacturing the same
- Patent Title (中): 真空断路器的电触点及其制造方法
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Application No.: US11480980Application Date: 2006-07-06
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Publication No.: US07662208B2Publication Date: 2010-02-16
- Inventor: Shigeru Kikuchi , Ayumu Morita , Masato Kobayashi , Satoru Kajiwara , Noboru Baba
- Applicant: Shigeru Kikuchi , Ayumu Morita , Masato Kobayashi , Satoru Kajiwara , Noboru Baba
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Mattingly & Malur, PC
- Priority: JP2005-198210 20050707; JP2005-240546 20050823
- Main IPC: C22C5/06
- IPC: C22C5/06 ; C22C9/00 ; H01H33/66
Abstract:
An electrical contact used herein comprises chromium; one of copper and silver; and a carbide, in which the electrical contact comprises a matrix and chromium, the matrix phase mainly comprising one of copper and silver, and the chromium being surrounded by the carbide and dispersed in the matrix. The electrical contact contains 1 to 30 percent by weight of a carbide, with the balance being copper. Another electrical contact contains chromium, copper, and a carbide and has a weight ratio of chromium to the carbide within the range of 1:1.5 to 1:50.
Public/Granted literature
- US20070007249A1 Electrical contacts for vacuum circuit breakers and methods of manufacturing the same Public/Granted day:2007-01-11
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