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. 11, 2001
Filed:
Aug. 24, 2000
Motoaki Ito, Shizuoka, JP;
Yoshiyo Wada, Shizuoka, JP;
Star Micronics Co., Ltd., Shizuoka, JP;
Abstract
An ultrasonic motor,comprises a stator-side elastic member,having a rotationally symmetrical shape, a rotor-side elastic member,having a rotationally symmetrical shape, a stator-side piezoelectric element,for imparting vibrations to the elastic member,a rotor-side piezoelectric element,for imparting vibrations to the elastic member,an output shaft,rotating integrally with the elastic member,a rotary transformer,for supplying power to the piezoelectric element,in non-contacting fashion, and housings,and,for accommodating therein the above-enumerated elements, wherein of three transformer circuits in the rotary transformer,a middle transformer circuit C,and an outermost transformer circuit C,are used as a two-phase drive power transformer circuit. This construction achieves stable power supply to the rotor side.