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. 28, 1990
Filed:
Mar. 17, 1988
Applicant:
Inventors:
Naotake Mohri, Kuroishi, Shimada, Tenpaku-cho, Tenpaku-ku, Nagoya-shi, Aichi, JP;
Nagao Saito, Tokyo, JP;
Assignees:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23H / ;
U.S. Cl.
CPC ...
219 6915 ; 204291 ;
Abstract
An electrode for precision electric discharge machining having an improved machining rate and surface smoothness with respect to conventional graphite and copper electrodes. The electrode is formed by silicon or other materials which has the same characteristics as silicon, a base of a low melting point metal or an alloy of such a low melting point metal is covered with a layer composed of a mixture of the metal and a high resistivity inorganic compound. The outer layer may be formed by adhesion or by thermal spraying or by a powder metal sintering technique.