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:
Aug. 05, 1997
Filed:
Mar. 13, 1996
Takatoshi Ashizawa, Kawasaki, JP;
Daisuke Saya, Urayasu, JP;
Ryoichi Suganuma, Yokohama, JP;
Tomohiko Yokoo, Inagi, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An ultrasonic motor having an electromechanical element and an elastic body joined by an adhesive layer, wherein the adhesive layer is chosen for having either a specific thermal expansion coefficient, a specific shrinkage volume, a high Vickers hardness, a high longitudinal elastic modulus, or a high Vickers hardness and a high longitudinal elastic modulus. By proper selection of an adhesive for use in the adhesive layer, the motor drive efficiency, starting torque and power consumption can be improved by reducing the deformation of the elastic body and maintaining a larger contact area with a contact member or movable element. Proper selection of an adhesive also allows the motor's performance level to be maintained when the temperature changes.