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:
May. 15, 2001
Filed:
Dec. 08, 1999
Kiyoshi Sawada, Shizuoka, JP;
Akira Yamamoto, Yamanashi, JP;
Fanuc, Ltd., Yamanashi, JP;
Abstract
A plurality of electrostrictive elements,are located about the perimeter section of a table,. The table is fixed to a table fixing member,. The table fixing member,is prohibited from rotating by guide pins,. When a servo motor,′ constituting a rotational drive mechanism,is driven by passing a current through a stator,therein, the rotor,rotates. Thereby, the table fixing member,, which has a female screw thread,that engages with a male screw thread,formed in the rotor,, moves in a vertical direction. The table,also moves in a vertical direction and can be registered in a desired position. Inclination of the table,caused by processing errors in the male screw,and female screw,is adjusted to a horizontal position or a desired angle, by driving the electrostrictive elements