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. 09, 2001
Filed:
Jul. 22, 1999
Masahiko Komoda, Toyokawa, JP;
Atsushi Tariki, Hamamatsu, JP;
Asmo Co., Ltd., Kosai, JP;
Abstract
An ultrasonic motor composed of a cylindrical stator having a vibration converting member and a cylindrical rotor slidably rotatable on the stator. Ultrasonic longitudinal vibration is generated in the stator by imposing high frequency voltage on piezoelectric elements disposed in the stator. A part of the longitudinal vibration is converted into twisting vibration by operation of slits formed on the vibration converting member. Both the longitudinal and twisting vibrations are compounded into elliptic vibration which drives the rotor. The vibration converting member is made by laminating a number of element plates each having cut-out portions or by combining several divided blocks. The slits are automatically formed on the vibration converting member without being machined, when the vibration converting member is formed by assembling the element plates or the divided blocks.