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:
Sep. 29, 1987
Filed:
Nov. 14, 1986
Shoji Mishiro, Kanagawa, JP;
Taga Electric Co., Ltd., Tokyo, JP;
Abstract
A rotary ultrasonic motor equipped with an ultrasonic vibrator including an electrostrictive element which is polarized in the direction of its thickness and has a plurality of electrode pairs arrayed uniformly in the circumferential direction. The electrostrictive element is held and clamped between two metallic members, and grooves are formed in at least one metallic member along division lines corresponding in number to the electrode pairs of the electrostrictive element, thereby constituting the ultrasonic vibrator. And a rotor having an output shaft at the center of rotation thereof is kept in pressed contact with the output end of the ultrasonic vibrator. In this motor, the rotor is driven by composite vibration, and an improved function is achievable to prevent mutual interference that may otherwise be caused by a circumferential stress at the axial vibration of the ultrasonic vibrator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile