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:
May. 02, 2006
Filed:
Aug. 30, 2002
Applicants:
Akihiro Goto, Tokyo, JP;
Kouichiro Hattori, Tokyo, JP;
Kazushi Nakamura, Tokyo, JP;
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23H 7/04 (2006.01); B23H 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wire cutting electric discharge machine has a high frequency voltage applying unit that applies a high frequency voltage and a direct current voltage applying unit applies a direct current voltage to the gap between the wire electrode and the workpiece. A detecting unit detects a low frequency component of a voltage occurring in the gap as a result of the electric discharge. The apparatus controls a feed rate based upon the state of the gap determined by the detecting unit.