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:
Nov. 15, 2005
Filed:
Dec. 11, 2002
Kuo-tsi Chang, Miaoli, TW;
Min-shen Ouyang, Hsinchu, TW;
Kuo-Tsi Chang, Miaoli, TW;
Min-Shen Ouyang, Hsinchu, TW;
Other;
Abstract
An ultrasonic clutch includes a driving element, a driven element and at least one alternating current (AC) power source. The driving element and the driven element are connected to a shaft of a driving device and an output axle of a loading, respectively. At least one of the driving element and the driven element is a piezoelectric device. When at least one of the driving element and the driven element is electrically connected to an AC power source, the near-field acoustic levitation, generated from the flexural vibration of the piezoelectric resonator above the piezoelectric resonator, occurs to push the driven element away from the driving element. Thus, the output shaft of the loading does not rotate with the axle of the driving device.