Patent ID: 6964327
Filing Date: 2005-11-15
Classification: F16D

Abstract:
1. An ultrasonic clutch for mounting between a driving device with a shaft and a load with an output axle comprising: a driving element to be attached to the shaft of the driving device; a driven element corresponding to and abutting the driving element and to be connected to the output axle, wherein at least one of the driving element and driven element is a piezoelectric device with a planar radiation surface and employed to generate a mechanical vibration for forming a near-field acoustic levitation; an alternating current (AC) power source device electrically connected to the at least one piezoelectric device to provide an alternating current power to the at least one piezoelectric device so as to generate the mechanical vibration for forming the near-field acoustic levitation; and a positioning device mounted between the driving element and the driven element to make an axis of the shaft of the driving device align with an axis of the output axle of the load when the output axle rotates; wherein the positioning device includes