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:
Oct. 08, 1991
Filed:
Apr. 16, 1990
Applicant:
Inventors:
Hiroshi Takamatsu, Oomiya, JP;
Katsunobu Ueda, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
5116571 ; 5116577 ; 5124 / ; 269 55 ;
Abstract
A polishing apparatus comprising a tool for polishing a surface of a workpiece, a table for supporting a workpiece, a piezoelectric element for minutely driving the table, a load detector for detecting the load applied from the tool to the workpiece supported on the table, and a load controller for controlling the drive means in accordance with the load detected by the detector. The piezoelectric element moves the table minutely in the same direction as, or the direction opposite to, the direction in which said tool applies a load to the workpiece.