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:
Feb. 23, 2010
Filed:
Mar. 14, 2008
Atsushi Kubo, Matsubara, JP;
Atsushi Kubo, Matsubara, JP;
JTEKT Corporation, Osaka, JP;
Abstract
A grinding wheel having a convex grinding surface is attached to a wheel spindle that is contactlessly supported by a casing through a controlled type axial magnetic bearing and controlled type radial magnetic bearings and that is rotated by an electric motor. A groove of a workpiece is ground by causing relative displacement of the casing. After the axial positioning of the casing is performed, the casing is radially displaced. Then, the groove is ground. The stiffness value of the axial magnetic bearingis set to be lower than a normal value before the casing is radially displaced. After it is detected that the grinding surface of the grinding wheel touches the entire groove of the workpiece and that the grinding of the entire surface of the workpiece is started, the stiffness value is set back to the normal value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile