Patent ID: 6455983
Filing Date: 2002-09-24
Classification: H01L,H02N

Abstract:
A motor comprising a piezoelectric element; means for exciting longitudinal and transverse vibration of said element in a plane of vibration, the longitudinal and transverse vibrations defining a plane of vibration; means for providing a preloading force in a direction of the longitudinal vibration; and means for restraining movement in a direction perpendicular to the longitudinal vibration,said element having a first bounding surface which extends perpendicularly to a direction of the longitudinal vibration of said element, said first bounding surface carrying an actuating member for transmitting a force in an actuating direction, and a second bounding surface opposite said first bounding surface engaged by said means for providing a preloading force, and said element having a first pair of bounding faces extending parallel to the plane of vibration, characterized in that said means for restraining comprises restraining elements respectively arranged for slidable engagement, without preloading, with each of the bounding faces of said first pair.