Patent ID: 8876832

Claim:
An ultrasonic handpiece comprising: a housing having a first and second end; an ultrasonic converter mounted within the first end of the housing, the ultrasonic converter being adapted to generate reciprocal movement in an axial direction of the housing; a sonotrode connected to one end of the ultrasonic converter and protruding out of the first end of the housing; an adjuster wheel adjustably connected to the second end of the housing; an elastic element, a first end of which engages the ultrasonic converter and a second end of which engages the adjuster wheel, wherein adjusting the location of the wheel in an axial direction of the housing applies a preload on the ultrasonic converter, and wherein the ultrasonic converter is movable within the housing in the axial direction of the housing; and wherein an inner surface of the adjuster wheel and an outer surface of the housing includes mating threads which permit the adjustment of the adjuster wheel.