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. 28, 2018
Filed:
Jun. 13, 2013
Commissariat À L'énergie Atomique ET Aux Énergies Alternatives, Paris, FR;
Abstract
An ultrasonic motor comprising a rotor () having an at least partly spherical shape and two actuators (') each comprising an element of plate-shaped piezoelectric material comprising at least one contact edge (′) in contact with the rotor (), said actuators (′) also comprising on one of their faces electrodes intended to bias piezoelectric materials in a bending mode and in a longitudinal mode. The contact edges (′) are concave and are formed by an arc of circle the radius of which substantially corresponds to the radius of the surface of the rotor (), said arcs of circle angularly extending at a determined angle such that the bending mode and the longitudinal mode in which the piezoelectric material is biased are at the same frequency.