发明名称 |
Method of maintaining constant movement of a cutting blade of an ultrasonic waveguide |
摘要 |
A method of maintaining constant movement of a cutting blade of an ultrasonic waveguide includes the steps of providing an ultrasonic transducer operable to convert a received motional voltage into a movement of a cutting blade of an ultrasonic waveguide, a motional feedback circuit connected in a parallel configuration with the ultrasonic transducer, and a variable power source operable to apply a first voltage between a set of connection points to the parallel configuration. A feedback voltage measured from the motional feedback circuit is determined and an output of the power source is varied based upon the measured feedback voltage to result in a substantially constant feedback voltage and, thereby, maintain a substantially constant rate of movement of the cutting blade across a variety of cutting loads.
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申请公布号 |
US8333779(B2) |
申请公布日期 |
2012.12.18 |
申请号 |
US201113072273 |
申请日期 |
2011.03.25 |
申请人 |
SMITH KEVIN W.;BALES, JR. THOMAS O.;PALMER MATTHEW A.;DEVILLE DEREK DEE;COVIDIEN AG |
发明人 |
SMITH KEVIN W.;BALES, JR. THOMAS O.;PALMER MATTHEW A.;DEVILLE DEREK DEE |
分类号 |
A61B17/32 |
主分类号 |
A61B17/32 |
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