Patent ID: 6924585
Filing Date: 2005-08-02
Classification: B06B

Abstract:
1. An ultrasonic transducer, comprising: one or more disk-shaped piezoelectric crystals, wherein each piezoelectric crystal has an axial hole; a tail mass positioned on one side of the piezoelectric crystals, wherein the tail mass includes an axial hole; a head mass positioned on a side of the piezoelectric crystals opposite the tail mass, wherein the head mass has an internally-threaded axial hole; and a threaded bolt positioned within the axial hole of each piezoelectric crystal and the axial holes of the tail mass and head mass and threaded into the internally-threaded axial hole of the head mass, wherein the bolt compresses the piezoelectric crystals between the tail mass and head mass; wherein the head mass includes two pieces composed of different materials, including a threaded sleeve that has said internally-threaded axial hole and has a reduced diameter section and further including an outer housing having an axial hole that mates with the reduced diameter section of the threaded sleeve.