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:
Apr. 21, 2015
Filed:
Jun. 11, 2013
Applicant:
Jtekt Corporation, Osaka-shi, JP;
Inventors:
Assignee:
JTEKT Corporation, Osaka-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16C 32/06 (2006.01); F16C 27/04 (2006.01); B23Q 1/38 (2006.01); B23Q 1/70 (2006.01); B23Q 11/00 (2006.01); F16C 21/00 (2006.01);
U.S. Cl.
CPC ...
F16C 27/045 (2013.01); B23Q 1/38 (2013.01); B23Q 1/70 (2013.01); B23Q 11/0032 (2013.01); F16C 32/06 (2013.01); B23Q 2220/006 (2013.01); F16C 21/00 (2013.01);
Abstract
A spindle unit includes: a main spindle that holds a rotary tool, and that is rotated; bearings by which the main spindle is rotatably supported; and a damper bearing by which the main spindle is rotatably supported, and that has a damping coefficient larger than damping coefficients of the bearings. The damping coefficient of the damper bearing is set to a value within a range from 10,000 to 1,000,000 N·s/m.