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:
Aug. 26, 1997
Filed:
Feb. 07, 1995
Shigeru Suzuki, Tachikawa, JP;
Ushiodenki Kabushiki Kaisha, , JP;
Abstract
A device to simply control a position and an amount of rotation of a carrier and to prevent a decrease of the control accuracy upon thermal expansion of the carrier. On a base (15), a carrier (16) is slidably and at the same time rotatably supported. The carrier (16) has arms (41, 42 and 43) which are driven by a respective drive element (21, 22 and 23) for each of three axes (X, X', and Y). The drive elements of each axis (21, 22, 23) are the same distance from a reference axis which functions as the center of rotation of the carrier (16). When the carrier (16) moves in the X direction, by means of the drive elements (21 and 22), two of the arms (41 and 42) are moved by the same amount. For movement in the Y direction, the third arm (43) is moved by the third of the drive elements (23). When the carrier (16) is turned, the drive elements (21, 22 and 23) move all of the arms (41, 42 and 43) the same amount in the direction in which the carrier is turned.