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:
Jul. 10, 2007
Filed:
May. 02, 2005
Masanori Kishi, Hachioji, JP;
Takashi Okamura, Hachioji, JP;
Masanori Kishi, Hachioji, JP;
Takashi Okamura, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
An ultrasonic motor includes rotors and an annular stator, which are integrated in the rotational direction, a rectangular parallelepiped multilayer piezoelectric transducer, a support shaft, and a transducer with drivers. The support shaft is attached to the outer circumference of the stator and arranged along the radial direction, and the drivers are abutted by a spring urging force to the rotors arranged on both sides of the stator in the axial direction, and are clamped with the rotors. When the transducer is driven so as to excite an elliptical movement produced by combining a bending standing-wave vibration with a longitudinal vibration with the drivers, the rotors are rotated relatively to the stator. Since the drivers are clamped with the integrated rotors, the ultrasonic motor can be driven with small frictional loss and improved conversion efficiency.