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:
Jul. 15, 2008
Filed:
Nov. 21, 2005
Applicants:
Shunsuke Matsubara, Yamanashi, JP;
Shinichi Horikoshi, Yamanashi, JP;
Takashi Okamoto, Yamanashi, JP;
Yuuichi Yamada, Yamanashi, JP;
Inventors:
Shunsuke Matsubara, Yamanashi, JP;
Shinichi Horikoshi, Yamanashi, JP;
Takashi Okamoto, Yamanashi, JP;
Yuuichi Yamada, Yamanashi, JP;
Assignee:
Fanuc Ltd, Yamanashi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21J 9/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A die cushion drive system provided with a servo motor serving as a source of drive power for a die cushion of a press machine and a power circuit with a regeneration function which regenerates energy from the servo motor and returns it to an AC power supply, whereby it is possible to power the die cushion drive system by a servo motor and return the regenerated energy of this servo motor to the power source so as to save on energy.