Patent ID: 7105985

Claim:
A transducer comprising: a resonator adapted for use in a cleaning system, the resonator comprising a distal end, a proximal end and a pair of angled walls, the resonator having a length “s”, with the distal end forming a face of the resonator in the shape of a rectangle having the length “s”and a width “n”, the pair of angled walls extending along the length “s” and being separated by the width “n” at the distal end, with the “n” being approximately two millimeters or more and the face being adapted for positioning adjacent to an time to be cleaned, the resonator having a cross section that has the shape of a trapezoid, the trapezoid having a top side and a bottom side and two nonparallel sides, with the top side being wider than the bottom side and the top side being part of the proximal end and being parallel to the bottom side, and the pair of angled walls forming the two nonparallel sides, and an acoustic energy generating means attached to the proximal end of the resonator for generating acoustic energy in the frequency range of 0.4 to 2.0 MHz, the pair of angled walls focusing the acoustic energy on the distal end and the acoustic energy generating means being positioned over at least part of the face of the resonator.