Patent Number: 6,166,477

Title: Ultrasonic motor with rotor converting longitudinal vibrations into torque

Abstract: An ultrasonic motor having a stator in which at least a longitudinal vibration is generated and a rotor rotatably mounted on the stator. Slanted slits are formed on the cylindrical surface of the rotor, which convert a part of the longitudinal vibration in the stator into a twisting vibration that gives the rotor a rotational force. The slits are slanted to the rotational direction of the rotor. The rotor is rotated at a higher speed because of the slits. The form of the slits may be selectively varied according to desired characteristics of the ultrasonic motor.

Inventors: Komoda; Masahiko (Toyokawa, JP), Miyamoto; Toshiaki (Toyohashi, JP), Kubota; Kazumasa (Toyohashi, JP), Yano; Motoyasu (Toyohashi, JP)

Assignee: Asmo Co., Ltd.

International Classification: H01L 41/09 (20060101); H02N 002/00 ()

Expiration Date: 12/26/2013