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:
Oct. 03, 2006
Filed:
Feb. 27, 2004
Osamu Miyazawa, Shimosuwa, JP;
Yasuharu Hashimoto, Minamiminowa, JP;
Osamu Miyazawa, Shimosuwa, JP;
Yasuharu Hashimoto, Minamiminowa, JP;
Seiko Epson Corporation, , JP;
Abstract
An ultrasonic motor of the present invention has a vibrating element. The vibrating elementincludes a first piezoelectric elementthat undergoes extension and contraction by application of an AC voltage, a reinforcing platehaving a contact portionand an arm portion, and a second piezoelectric elementthat undergoes extension and contraction by application of an AC voltage. The first piezoelectric element, the reinforcing plate, and the second piezoelectric elementare laminated in this order. The vibrating elementis fixedly mounted through the arm portionso that the contact portionabuts on a driven element (rotor). Further, the vibrating elementhas a body portion and a length L of the body portion in a direction in which the vibrating elementextends and contracts by application of the AC voltage is 1 to 20 mm.