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:
Nov. 13, 2018
Filed:
Sep. 16, 2015
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Masahiko Ono, Tokyo, JP;
Makoto Hirose, Tokyo, JP;
Daisuke Ebisawa, Tokyo, JP;
Hisashi Urasaki, Tokyo, JP;
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H 33/88 (2006.01); B32B 7/02 (2006.01); B32B 15/20 (2006.01);
U.S. Cl.
CPC ...
H01H 33/88 (2013.01); B32B 7/02 (2013.01); B32B 15/20 (2013.01); B32B 2307/50 (2013.01); H01H 2205/002 (2013.01);
Abstract
Disclosed is an abrasion resistant material having low cost and excellent abrasion resistance, a puffer cylinder, and a puffer type gas circuit breaker. The abrasion resistant material includes: a base material which is formed of pure aluminum or aluminum alloy and has an unevenness structure formed on its surface; and an aluminum hydrated oxide film which is formed on the surface of the base material, wherein a surface of the aluminum hydrated oxide film is provided with an unevenness structure which is finer than the unevenness structure of the base material.