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:
Sep. 02, 2008
Filed:
Sep. 01, 2005
Applicants:
Akihiko Fujimoto, Yamanashi, JP;
Norio Watanabe, Fujiyoshida, JP;
Masahiro Murota, Yamanashi, JP;
Inventors:
Assignee:
Fanuc Ltd, Yamanashi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23C 5/26 (2006.01); B23P 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
For a spring sliding on the drawbar, the coil spring is used; the removal work for keeping the inner diameters of the coil springs aligned is performed such that the clearance between the outer diameter of the drawbar and the inner diameter of the coil spring becomes a minimum; and the coil springs are caused to be guided integrally with the drawbar. By doing so, the movement of the center of gravity of the spring that is caused by repeated rotational operation of the main spindle or repeated tool clamping operation will be reduced and the amplitude by vibration will be made smaller.