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:
Mar. 03, 1998
Filed:
Jun. 10, 1996
Yoshiro Tomikawa, Yonezawa, JP;
Tadao Takagi, Yokohama, JP;
Mitsuhiro Okazaki, Kawasaki, JP;
Takatoshi Ashizawa, Kawasaki, JP;
Isao Sugaya, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A vibration driven motor can be driven with high torque at high rotation, and has a simple structure that can be manufactured easily. The motor may comprise a stator in a cylindrical form, a rotor disposed on the end surface of the stator and a pressing member for pressing the rotor on the stator with pressure, the stator may include a first piezoelectric electro-mechanical converting element for generating torsional vibration around the axis of the stator, a second electro-mechanical converting element for generating longitudinal vibration in the axial direction of the stator, and a pair of substantially semi-cylindrical vibration members, and the first or second piezoelectric element may be one or more plate-like members sandwiched by the vibration members of the stator.