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. 12, 2006
Filed:
Mar. 02, 2005
Masao Murai, Gotenba, JP;
Akiyoshi Kawahara, Yamanashi, JP;
Masao Murai, Gotenba, JP;
Akiyoshi Kawahara, Yamanashi, JP;
Fanuc Ltd, Yamanashi, JP;
Abstract
An electric-discharge-machining power supply device in which energy loss is hardly produced and a charge voltage of a capacitor is easily controlled. When a switching element SWis turned on, a capacitor C is charged via an inductor L. When the voltage Vc of the charged capacitor exceeds the voltage of a direct-current power source E, a current is returned to the power source E via a diode D. When the switching element SWis turned off, energy stored in the inductor L flows from the inductor L through the diode D, the power source E and the diode D, so that the voltage Vc of the capacitor C is kept at the power source voltage. When a switching element SWis turned on, the voltage of the capacitor is applied between an electrode and a workpiece.