Patent ID: 7268464
Filing Date: 2007-09-11
Classification: H01L,H02N

Abstract:
1. An ultrasonic motor, comprising: at least one transducer exciting an elliptical vibration produced by combining a bending standing-wave vibration with a longitudinal vibration; a body of rotation rotatable about a rotational axis relative to the transducer by the effect of the elliptical vibration of the transducer arranged at a predetermined position along a circumference of the body of rotation; a support member for restricting movement of the transducer along the rotational axis and in the circumferential direction as well as for movably supporting the transducer in a direction toward the rotational axis of the body of rotation; and an urging member provided in the support member for urging the transducer toward the rotational axis of the body of rotation so that the transducer moveable in the direction toward the rotational axis of the body of rotation is usually in contact with the circumference of the body of rotation; and wherein the transducer is supported rotatably about an axis substantially in parallel with the rotational axis of the body of rotation.