Method of Maintaining Constant Movement of a Cutting Blade of an Ultrasonic Waveguide
First Claim
1. A method of maintaining constant movement of a cutting blade of an ultrasonic waveguide, which comprises:
- 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;
determining a feedback voltage measured from the motional feedback circuit; and
varying an output of the power source 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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0 Petitions
Accused Products
Abstract
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.
11 Citations
28 Claims
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1. A method of maintaining constant movement of a cutting blade of an ultrasonic waveguide, which comprises:
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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; determining a feedback voltage measured from the motional feedback circuit; and varying an output of the power source 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of maintaining constant movement of a cutting blade of an ultrasonic waveguide, which comprises:
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providing; an ultrasonic transducer operable to convert a received motional voltage into a movement of a cutting blade of an ultrasonic waveguide; a first capacitive element in a series configuration with the ultrasonic transducer; a second capacitive element and a third capacitive element in a series configuration with each other and, together, connected in a parallel configuration with the series configuration of the ultrasonic transducer and the first capacitive element; and a variable power source connected in a parallel configuration with; the series configuration of the ultrasonic transducer and the first capacitive element; and the series configuration of the second and third capacitive elements, the variable power source operable to apply a first voltage between a set of connection points to the parallel configuration; determining a feedback voltage measured from a first point located between the second and third capacitive elements and a second point located between the ultrasonic transducer and the first capacitive element; and varying an output of the power source 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. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method of maintaining constant movement of a cutting blade of an ultrasonic waveguide, which comprises:
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providing; an ultrasonic transducer operable to convert a received motional voltage into a movement of a cutting blade of an ultrasonic waveguide; a removable battery; a disposable handle body with; a portion defining a battery-holding compartment having at least two battery contacts; a waveguide attachment dock exposed to the environment and shaped to accept the ultrasonic waveguide therein; a transducer attachment dock exposed to the environment and shaped to place the ultrasonic transducer in coaxial alignment with the ultrasonic waveguide when the ultrasonic waveguide is disposed within the waveguide attachment dock; and an ultrasonic-signal-generator assembly dock exposed to the environment and shaped to substantially simultaneously; selectively removably secure at least the ultrasonic transducer to the handle body; place an end of the ultrasonic transducer within the transducer attachment dock; and electrically couple at least the ultrasonic transducer to the at least two battery contacts; a first capacitive element in a series configuration with the ultrasonic transducer; a second capacitive element and a third capacitive element in a series configuration with each other and, together, connected in a parallel configuration with the series configuration of the ultrasonic transducer and the first capacitive element; and a variable power source connected in a parallel configuration with; the series configuration of the ultrasonic transducer and the first capacitive element; and the series configuration of the second and third capacitive elements, the variable power source operable to apply a first voltage between a set of connection points to the parallel configuration; determining a feedback voltage measured from a first point located between the second and third capacitive elements and a second point located between the ultrasonic transducer and the first capacitive element; and varying an output of the power source 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. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A method of maintaining constant movement of a cutting blade of an ultrasonic waveguide, which comprises:
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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, the variable power source comprising a removable battery; determining a feedback voltage measured from the motional feedback circuit; and varying an output of the power source 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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Specification