Patents by Inventor James H. Orszulak
James H. Orszulak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20120116268Abstract: A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.Type: ApplicationFiled: January 16, 2012Publication date: May 10, 2012Inventors: James H. Orszulak, James W. McPherson
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Patent number: 8113057Abstract: A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.Type: GrantFiled: June 27, 2008Date of Patent: February 14, 2012Assignee: Covidien AGInventors: James H. Orszulak, James W. McPherson
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Patent number: 8096961Abstract: A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.Type: GrantFiled: June 27, 2008Date of Patent: January 17, 2012Assignee: Covidien AGInventors: James H. Orszulak, James W. McPherson
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Publication number: 20110264088Abstract: A system and method for transmitting electrosurgical energy from a generator to an electrosurgical instrument are provided. The electrosurgical system includes a generator adapted to generate electro surgical energy for treating tissue. The generator includes one or more active output terminals which supply energy to the tissue. The active output terminals are operatively connected to one or more supply lines. The generator also includes one or more return output terminal which returns energy from the tissue. The return output terminals are operatively connected to at least one return line. The system also includes an electrosurgical instrument operatively connected to the one or more supply lines and one or more return electrodes operatively connected to one or more return lines. The system further includes an electrosurgical cable including one or more supply lines and one or more return lines.Type: ApplicationFiled: July 11, 2011Publication date: October 27, 2011Inventor: James H. Orszulak
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Patent number: 7985220Abstract: A system and method for transmitting electro surgical energy from a generator to an electrosurgical instrument are provided. The electrosurgical system includes a generator adapted to generate electrosurgical energy for treating tissue. The generator includes one or more active output terminals which supply energy to the tissue. The active output terminals are operatively connected to one or more supply lines. The generator also includes one or more return output terminal which returns energy from the tissue. The return output terminals are operatively connected to at least one return line. The system also includes an electrosurgical instrument operatively connected to the one or more supply lines and one or more return electrodes operatively connected to one or more return lines. The system further includes an electrosurgical cable including one or more supply lines and one or more return lines.Type: GrantFiled: September 24, 2010Date of Patent: July 26, 2011Assignee: Coviden AGInventor: James H. Orszulak
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Publication number: 20110178516Abstract: An electrosurgical system is disclosed comprising a generator configured to electrosurgical coagulation waveforms. The generator includes a closed loop control system for controlling the electrosurgical coagulation waveforms. The closed loop control system includes a sensor configured to sense a tissue property and/or an energy property and to transmit the tissue property and/or the energy property as one or more sensor signals having an amplitude. The control system also includes a gain controller configured to process the at least one sensor signal to reduce the amplitude of the sensor signals and to obtain a signal to noise ratio of the at sensor signals within a predetermine range. A microprocessor coupled to the generator and is configured to adjust the electrosurgical coagulation waveforms as a function of the sensor signals.Type: ApplicationFiled: March 29, 2011Publication date: July 21, 2011Applicant: Covidien AGInventors: James H. Orszulak, Robert H. Wham
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Patent number: 7927328Abstract: An electrosurgical system is disclosed comprising a generator configured to electrosurgical coagulation waveforms. The generator includes a closed loop control system for controlling the electrosurgical coagulation waveforms. The closed loop control system includes a sensor configured to sense a tissue property and/or an energy property and to transmit the tissue property and/or the energy property as one or more sensor signals having an amplitude. The control system also includes a gain controller configured to process the at least one sensor signal to reduce the amplitude of the sensor signals and to obtain a signal to noise ratio of the at sensor signals within a predetermine range. A microprocessor coupled to the generator and is configured to adjust the electrosurgical coagulation waveforms as a function of the sensor signals.Type: GrantFiled: January 24, 2007Date of Patent: April 19, 2011Assignee: Covidien AGInventors: James H. Orszulak, Robert H. Wham
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Publication number: 20110015629Abstract: A system and method for transmitting electro surgical energy from a generator to an electrosurgical instrument are provided. The electrosurgical system includes a generator adapted to generate electrosurgical energy for treating tissue. The generator includes one or more active output terminals which supply energy to the tissue. The active output terminals are operatively connected to one or more supply lines. The generator also includes one or more return output terminal which returns energy from the tissue. The return output terminals are operatively connected to at least one return line. The system also includes an electrosurgical instrument operatively connected to the one or more supply lines and one or more return electrodes operatively connected to one or more return lines. The system further includes an electrosurgical cable including one or more supply lines and one or more return lines.Type: ApplicationFiled: September 24, 2010Publication date: January 20, 2011Inventor: James H. Orszulak
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Patent number: 7819865Abstract: A system and method for transmitting electrosurgical energy from a generator to an electrosurgical instrument are provided. The electrosurgical system includes a generator adapted to generate electrosurgical energy for treating tissue. The generator includes one or more active output terminals which supply energy to the tissue. The active output terminals are operatively connected to one or more supply lines. The generator also includes one or more return output terminal which returns energy from the tissue. The return output terminals are operatively connected to at least one return line. The system also includes an electrosurgical instrument operatively connected to the one or more supply lines and one or more return electrodes operatively connected to one or more return lines. The system further includes an electrosurgical cable including one or more supply lines and one or more return lines.Type: GrantFiled: September 20, 2006Date of Patent: October 26, 2010Assignee: Covidien AGInventor: James H. Orszulak
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Patent number: 7804308Abstract: The present disclosure describes an instrument for measuring the dielectric properties of biological tissue. The instrument includes a top electrode assembly and a bottom electrode assembly, the top electrode assembly including a top electrode and at least one shaft adjustably positionable to move the top electrode relative to the bottom electrode assembly, the bottom electrode assembly including a bottom test plate and a bottom electrode. The instrument also includes a testing cylinder coupled to the shaft and having an inner cavity defined therein that houses the top electrode and which is designed to enclose the bottom electrode therein. The testing cylinder is configured to reduce at least one of electric current, magnetic current, stray radiative RF fields and external capacitive leakage currents during activation of the top and bottom electrodes.Type: GrantFiled: October 17, 2008Date of Patent: September 28, 2010Assignee: Covidien AGInventors: Ronald J. Podhajsky, James H. Orszulak, Behzad Ghorbani-Elizeh, David Dumbauld
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Publication number: 20100063497Abstract: A circuit for controlling the discharging of stored energy in an electrosurgical generator includes a pulse modulator which controls an output of a power supply. At least one comparator is configured to provide an error signal to the pulse modulator based on a comparison between an output signal generated by the power supply and a feedback signal generated in response to the application of energy to tissue. A discharge circuit is configured to control the discharge of the output of the power supply to an inductive load disposed in parallel with the output of the power supply based on the comparison between the output signal and the feedback signal. The discharge circuit provides a rapid response and time rate control of the delivered electrosurgical energy by controlling the power supply and delivered RF energy in real time, based on a feedback signal generated in response to the application of energy to tissue.Type: ApplicationFiled: September 5, 2008Publication date: March 11, 2010Inventor: James H. Orszulak
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Publication number: 20100063494Abstract: A circuit for controlling the discharging of stored energy in an electrosurgical generator includes a pulse modulator which controls an output of a power supply. At least one comparator is configured to provide an error signal to the pulse modulator based on a comparison between an output signal generated by the power supply and a feedback signal generated in response to the application of energy to tissue. A discharge circuit is configured to control the discharge of the output of the power supply to an inductive load disposed in parallel with the output of the power supply based on the comparison between the output signal and the feedback signal. The discharge circuit provides a rapid response and time rate control of the delivered electrosurgical energy by controlling the power supply and delivered RF energy in real time, based on a feedback signal generated in response to the application of energy to tissue.Type: ApplicationFiled: September 5, 2008Publication date: March 11, 2010Inventor: James H. Orszulak
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Patent number: 7648499Abstract: An electrosurgical generator is disclosed. The electrosurgical generator includes a power supply for generating a DC voltage. The electrosurgical generator also includes a first parallel inductor-capacitor circuit being driven by a first signal at a first predetermined frequency and a second parallel inductor-capacitor inductor-capacitor circuit driven by a second signal at the first predetermined frequency phase shifted 180°. The electrosurgical generator further includes a series inductor-capacitor resonant circuit operably connected in series with a primary winding of a transformer. The first and second parallel inductor-capacitor circuits are operably connected to the transformer, such that the first inductor-capacitor circuit generates a positive half sine wave and the second inductor-capacitor circuit generates a 180° phase-shifted positive half sine wave to generate a full sine wave in a secondary winding of the transformer.Type: GrantFiled: March 21, 2006Date of Patent: January 19, 2010Assignee: Covidien AGInventors: James H. Orszulak, James W. McPherson
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Publication number: 20090259224Abstract: A method for electrosurgically sealing a tissue includes steps of: (A) applying a first pulse of RF energy to the tissue; and (B) applying at least one subsequent RF energy pulse to the tissue and keeping constant or varying RF energy parameters of individual pulses of subsequent RF energy pulses in accordance with at least one characteristic of an electrical transient that occurs during the individual RF energy pulses. The method terminates the generation of the at least one subsequent RF pulse upon a determination that the electrical transient is absent.Type: ApplicationFiled: March 28, 2008Publication date: October 15, 2009Inventors: Robert H. Wham, Steven P. Buysse, James H. Orszulak
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Publication number: 20090248003Abstract: An electrosurgical generator is disclosed, which includes a closed loop control system having a sensor system configured to sense tissue and/or energy properties at a tissue site and to generate a sensor signal representative of the tissue and/or energy properties. The control system includes a controller configured to select an electrosurgical operational mode from a plurality of electrosurgical operational modes in response to the sensor signal. A radio frequency arbitrary source is also included which is configured to generate a radio frequency input signal corresponding to the selected electrosurgical operational mode and a radio frequency output stage configured to generate a treatment signal which corresponds to the electrosurgical operational mode.Type: ApplicationFiled: February 19, 2009Publication date: October 1, 2009Inventor: James H. Orszulak
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Publication number: 20090237169Abstract: An electrosurgical generator is disclosed. The electrosurgical generator includes a power supply for generating a DC voltage. The electrosurgical generator also includes a first parallel inductor-capacitor circuit being driven by a first signal at a first predetermined frequency and a second parallel inductor-capacitor circuit driven by a second signal at the first predetermined frequency phase shifted 180 degrees. The electrosurgical generator further includes a series inductor-capacitor resonant circuit operably connected in series with a primary winding of a transformer. The first and second parallel inductor-capacitor circuits are operably connected to the transformer, such that the first inductor-capacitor circuit generates a positive half sine wave and the second inductor-capacitor circuit generates a 180 degrees phase-shifted positive half sine wave to generate a full sine wave in a secondary winding of the transformer.Type: ApplicationFiled: June 3, 2009Publication date: September 24, 2009Inventor: James H. Orszulak
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Publication number: 20090157073Abstract: An electrosurgical generator is disclosed. The generator includes an RF output stage configured to generate a sinusoidal waveform for a selected electrosurgical mode. The RF output stage includes first and second connections, the first connection including a first switching component and a first parallel inductor-capacitor resonant circuit and the second connection including a second switching component and a second parallel inductor-capacitor resonant circuit. The first parallel inductor-capacitor resonant circuit is configured to produce a first half-sinusoidal waveform and the second parallel inductor-capacitor resonant circuit is configured to produce a second half-sinusoidal waveform. The first and second switching components are in a 180 degree out-of-phase relationship and are configured to operate at a predetermined frequency based on a phase-correlated dual drive signal.Type: ApplicationFiled: February 25, 2009Publication date: June 18, 2009Inventor: James H. Orszulak
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Patent number: 7513896Abstract: An electrosurgical generator is disclosed, which includes an RF output stage connected to a DC power supply and first and second connections. The first connection includes a first switching component and a first parallel inductor-capacitor resonant circuit. The second connection includes a second switching components and a second parallel inductor-capacitor resonant circuit. The first and second switching components are configured to open and close at a predetermined frequency based on a phase-correlated dual drive signal emitted by a driver and are in a 180 degree out-of-phase relationship. The first parallel inductor-capacitor resonant circuit is further configured to produce a first half-sinusoidal waveform and the second parallel inductor-capacitor resonant circuit is configured to produce a second half-sin half-sinusoidal waveform.Type: GrantFiled: January 24, 2006Date of Patent: April 7, 2009Assignee: Covidien AGInventor: James H. Orszulak
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Publication number: 20090039900Abstract: The present disclosure describes an instrument for measuring the dielectric properties of biological tissue. The instrument includes a top electrode assembly and a bottom electrode assembly, the top electrode assembly including a top electrode and at least one shaft adjustably positionable to move the top electrode relative to the bottom electrode assembly, the bottom electrode assembly including a bottom test plate and a bottom electrode. The instrument also includes a testing cylinder coupled to the shaft and having an inner cavity defined therein that houses the top electrode and which is designed to enclose the bottom electrode therein. The testing cylinder is configured to reduce at least one of electric current, magnetic current, stray radiative RF fields and external capacitive leakage currents during activation of the top and bottom electrodes.Type: ApplicationFiled: October 17, 2008Publication date: February 12, 2009Inventors: Ronald J. Podhajsky, James H. Orszulak, Behzad Ghorbani Elizeh, David Dumbauld
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Publication number: 20080287838Abstract: A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.Type: ApplicationFiled: June 27, 2008Publication date: November 20, 2008Inventors: James H. Orszulak, James W. McPherson