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. 18, 2021
Filed:
Jun. 29, 2017
Applicant:
Physik Instrumente (Pi) Gmbh & Co. KG, Karlsruhe, DE;
Inventor:
Thomas Polzer, Graben-Neudorf, DE;
Assignee:
PHYSIK INSTRUMENT (PI) GMBH & CO. KG, Karlsruhe, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02N 2/02 (2006.01); H02N 2/00 (2006.01); H02N 2/04 (2006.01); H02N 2/06 (2006.01); H01L 41/09 (2006.01); H02N 2/10 (2006.01);
U.S. Cl.
CPC ...
H02N 2/026 (2013.01); H02N 2/002 (2013.01); H02N 2/006 (2013.01); H02N 2/0055 (2013.01); H02N 2/0065 (2013.01); H02N 2/04 (2013.01); H02N 2/06 (2013.01); H01L 41/0986 (2013.01); H02N 2/103 (2013.01);
Abstract
A hollow-cylindrical ultrasonic actuator is disclosed a central axis, an inner peripheral surface facing the central axis and an outer peripheral surface facing away from the central axis and spaced apart from the inner peripheral surface, a closed inner contour curve, a closed outer contour curve, at least one electrode, and an electromechanical material provided between opposed electrodes. In a non-actuated state of the ultrasonic actuator, a curvature of the inner contour curve or of an outer contour curve includes at least three mutually spaced-apart local maximum points.