Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 26, 2010
Patent Application Number
10916675
Date Filed
August 12, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
A handpiece having a single set of piezoelectric elements polarized to produce longitudinal motion when excited at the relevant resonant frequency. The piezoelectric crystals are connected to an ultrasonic horn to which a cutting tip is attached. The horn and/or the cutting tip contains a plurality of diagonal slits or grooves. The slits or grooves produce optimized torsional movement in the cutting tip when the piezoelectric crystals are excited at a second resonant frequency. Preferably, the two drive frequencies are not coincident, but provided in non-overlapping pulses.
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