Patents by Inventor Amrita Singh Sawhney

Amrita Singh Sawhney 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).

  • ESTIMATING STATE OF ULTRASONIC END EFFECTOR AND CONTROL SYSTEM THEREFOR
    Publication number: 20230233245
    Abstract: Various aspects of a generator, ultrasonic device, and method for estimating a state of an end effector of an ultrasonic device are disclsoed. The ultrasonic device includes an electromechanical ultrasonic system defined by a predetermined resonant frequency, including an ultrasonic transducer coupled to an ultrasonic blade. A control circuit measures a complex impedance of an ultrasonic transducer, wherein the complex impedance is defined as Z g ( t ) = V g t I g t . The control circuit receivs a complex impedance measurement data point and compares the complex impedance measurement data point to a data point in a reference complex impedance characteristic pattern. The control circuit then classifies the complex impedance measurement data point based on a result of the comparison analysis and assigns a state or condition of the end effector based on the result of the comparison analysis.
    Type: Application
    Filed: October 10, 2022
    Publication date: July 27, 2023
    Inventors: Cameron R. Nott, Foster B. Stulen, Fergus P. Quigley, John E. Brady, Gregory A. Trees, Amrita Singh Sawhney, Rafael J. Ruiz Ortiz, Patrick J. Scoggins, Kristen G. Denzinger, Craig N. Faller, Madeleine C. Jayme, Alexander R. Cuti, Matthew S. Schneider, Chad P. Boudreaux, Brian D. Black, Maxwell T. Rockman, Gregory D. Bishop, Frederick E. Shelton, IV, David C. Yates
  • Temperature control of ultrasonic end effector and control system therefor
    Patent number: 11571234
    Abstract: A generator, ultrasonic device, and method of determining a temperature of an ultrasonic blade are disclosed. A control circuit coupled to a memory determines an actual resonant frequency of an ultrasonic electromechanical system comprising an ultrasonic transducer coupled to an ultrasonic blade by an ultrasonic waveguide. The actual resonant frequency is correlated to an actual temperature of the ultrasonic blade. The control circuit retrieves from the memory a reference resonant frequency of the ultrasonic electromechanical system. The reference resonant frequency is correlated to a reference temperature of the ultrasonic blade. The control circuit then infers the temperature of the ultrasonic blade based on the difference between the actual resonant frequency and the reference resonant frequency.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: February 7, 2023
    Assignee: Cilag GmbH International
    Inventors: Cameron R. Nott, Fergus P. Quigley, Amrita Singh Sawhney, Stephen M. Leuck, Brian D. Black, Eric M. Roberson, Patrick J. Scoggins, Craig N. Faller, Madeleine C. Jayme, Jacob S. Gee, Frederick E. Shelton, IV, David C. Yates
  • Estimating state of ultrasonic end effector and control system therefor
    Patent number: 11464559
    Abstract: Various aspects of a generator, ultrasonic device, and method for estimating a state of an end effector of an ultrasonic device are disclosed. The ultrasonic device includes an electromechanical ultrasonic system defined by a predetermined resonant frequency, including an ultrasonic transducer coupled to an ultrasonic blade. A control circuit measures a complex impedance of an ultrasonic transducer, wherein the complex impedance is defined as Z g ? ( t ) = V g ? ( t ) I g ? ( t ) . The control circuit receives a complex impedance measurement data point and compares the complex impedance measurement data point to a data point in a reference complex impedance characteristic pattern. The control circuit then classifies the complex impedance measurement data point based on a result of the comparison analysis and assigns a state or condition of the end effector based on the result of the comparison analysis.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: October 11, 2022
    Assignee: Cilag GmbH International
    Inventors: Cameron R. Nott, Foster B. Stulen, Fergus P. Quigley, John E. Brady, Gregory A. Trees, Amrita Singh Sawhney, Rafael J. Ruiz Ortiz, Patrick J. Scoggins, Kristen G. Denzinger, Craig N. Faller, Madeleine C. Jayme, Alexander R. Cuti, Matthew S. Schneider, Brian D. Black, Maxwell Rockman, Gregory D. Bishop, Frederick E. Shelton, IV, David C. Yates
  • ESTIMATING STATE OF ULTRASONIC END EFFECTOR AND CONTROL SYSTEM THEREFOR
    Publication number: 20190201073
    Abstract: Various aspects of a generator, ultrasonic device, and method for estimating a state of an end effector of an ultrasonic device are disclosed. The ultrasonic device includes an electromechanical ultrasonic system defined by a predetermined resonant frequency, including an ultrasonic transducer coupled to an ultrasonic blade. A control circuit measures a complex impedance of an ultrasonic transducer, wherein the complex impedance is defined as Z g ? ( t ) = V g ? ( t ) I g ? ( t ) . The control circuit receives a complex impedance measurement data point and compares the complex impedance measurement data point to a data point in a reference complex impedance characteristic pattern. The control circuit then classifies the complex impedance measurement data point based on a result of the comparison analysis and assigns a state or condition of the end effector based on the result of the comparison analysis.
    Type: Application
    Filed: August 28, 2018
    Publication date: July 4, 2019
    Inventors: Cameron R. Nott, Foster B. Stulen, Fergus P. Quigley, John E. Brady, Gregory A. Trees, Amrita Singh Sawhney, Rafael J. Ruiz Ortiz, Patrick J. Scoggins, Kristen G. Denzinger, Craig N. Faller, Madeleine C. Jayme, Alexander R. Cuti, Matthew S. Schneider, Chad P. Boudreaux, Brian D. Black, Maxwell Rockman, Gregory D. Bishop, Frederick E. Shelton, IV, David C. Yates
  • TEMPERATURE CONTROL OF ULTRASONIC END EFFECTOR AND CONTROL SYSTEM THEREFOR
    Publication number: 20190201036
    Abstract: A generator, ultrasonic device, and method of determining a temperature of an ultrasonic blade are disclosed. A control circuit coupled to a memory determines an actual resonant frequency of an ultrasonic electromechanical system comprising an ultrasonic transducer coupled to an ultrasonic blade by an ultrasonic waveguide. The actual resonant frequency is correlated to an actual temperature of the ultrasonic blade. The control circuit retrieves from the memory a reference resonant frequency of the ultrasonic electromechanical system. The reference resonant frequency is correlated to a reference temperature of the ultrasonic blade. The control circuit then infers the temperature of the ultrasonic blade based on the difference between the actual resonant frequency and the reference resonant frequency.
    Type: Application
    Filed: August 28, 2018
    Publication date: July 4, 2019
    Inventors: Cameron R. Nott, Fergus P. Quigley, Amrita Singh Sawhney, Stephen M. Leuck, Brian D. Black, Eric M. Roberson, Patrick J. Scoggins, Craig N. Faller, Madeleine C. Jayme, Jacob S. Gee, Frederick E. Shelton, IV, David C. Yates