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:
Dec. 05, 2006
Filed:
Dec. 01, 2004
Applicants:
Akihiro Sakurai, Yamanashi, JP;
Yasuo Arakawa, Yamanashi, JP;
Inventors:
Akihiro Sakurai, Yamanashi, JP;
Yasuo Arakawa, Yamanashi, JP;
Assignee:
Fanuc Ltd, Yamanashi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23H 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electric discharge machine has a main power supply and a sub-power supply connected in parallel across a gap formed by an electrode and a workpiece. A voltage is first applied to the gap from the sub-power supply, and then machining energy is supplied to the gap from the main power supply when detected that the gap voltage has fallen to or below a certain detection level. Stable machining is achieved by changing the detection level according to the machining state.