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:
Jan. 10, 1989
Filed:
Feb. 03, 1986
Applicant:
Inventors:
Assignee:
Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23H / ; B05D / ;
U.S. Cl.
CPC ...
219 / ; 427 39 ;
Abstract
An electrode for electric discharge machining wherein at least a part of the surface of the electrode is coated with a non-single crystalline insulator to prevent undesirable electric discharge between the electrode and a workpiece. The electrode may also have a coating of a buffer material formed from a metal having a small thermal expansion coefficient or from an amorphous material, in which case the exterior coat is a hard insulator with a Vickers hardness of at least 1000 coated on the buffer. A process for the production of these electrodes using plasma discharge methods is also described.