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:
Mar. 10, 2009
Filed:
Apr. 27, 2007
Kenji Uchino, State College, PA (US);
Clive A. Randall, State College, PA (US);
Jose Agraz, La Jolla, CA (US);
Richard Eitel, State College, PA (US);
Seung-ho Park, State College, PA (US);
Kenji Uchino, State College, PA (US);
Clive A. Randall, State College, PA (US);
Jose Agraz, La Jolla, CA (US);
Richard Eitel, State College, PA (US);
Seung-Ho Park, State College, PA (US);
The Penn State Research Foundation, University Park, PA (US);
Abstract
A piezoelectric ultrasonic motor having 2-dimensional positioning movement includes a stator. The stator includes a piezoelectric ceramic bar and an electrode disposed on the bar. Each bar includes two wings that are separated by a predetermined angle to form a predetermined shape. A power source is used to apply a voltage to the stator to excite a bending mode vibration in the each of the wings, and the combined motion of the two wings produces an elliptical motion at a tip of the wing. A load is operatively connected to the stator, such that a portion of the load in contact with the stator is driven to move linearly through a frictional force between the load and the stator, due to the elliptical motion at the tip of the wing.