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. 01, 2002
Filed:
May. 11, 1999
Applicant:
Inventors:
Woo Sok Chang, Lexington, MA (US);
Kamal Youcef-Toumi, Cambridge, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 2/300 ;
U.S. Cl.
CPC ...
F16C 2/300 ;
Abstract
A high precision friction drive positioning stage system is described. The friction drive positioning stage system uses three special actuation systems, each having a tip in contact with the stage and being capable of generating directional elliptical motion which allows the stage to move in any direction in the plane of the stage and in rotation. In one embodiment, each actuation system includes a plurality of piezoelectric elements in contact with a hat-shaped element at which the tip of the actuation system is located.