Patents by Inventor Maxwell Rockman

Maxwell Rockman 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
    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
  • Determining the state of an ultrasonic end effector
    Patent number: 11317937
    Abstract: Various systems and methods for determining the state of an end effector of an ultrasonic surgical instrument are disclosed. A control circuit can be configured to measure a complex impedance of an ultrasonic electromechanical system including an ultrasonic blade and compare the measured complex impedance to reference complex impedance patterns that each correspond to a state of the end effector. Accordingly, the control circuit can further be configured to determine the state of the end effector according to which of the plurality of reference complex impedance patterns the measured complex impedance corresponds.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: May 3, 2022
    Assignee: Cilag GmbH International
    Inventors: Cameron R. Nott, Fergus P. Quigley, Alexander R. Cuti, Matthew S. Schneider, Maxwell Rockman, Gregory D. Bishop
  • DETERMINING THE STATE OF AN ULTRASONIC END EFFECTOR
    Publication number: 20190274716
    Abstract: Various systems and methods for determining the state of an end effector of an ultrasonic surgical instrument are disclosed. A control circuit can be configured to measure a complex impedance of an ultrasonic electromechanical system including an ultrasonic blade and compare the measured complex impedance to reference complex impedance patterns that each correspond to a state of the end effector. Accordingly, the control circuit can further be configured to determine the state of the end effector according to which of the plurality of reference complex impedance patterns the measured complex impedance corresponds.
    Type: Application
    Filed: August 28, 2018
    Publication date: September 12, 2019
    Inventors: Cameron R. Nott, Fergus P. Quigley, Alexander R. Cuti, Matthew S. Schneider, Maxwell Rockman, Gregory D. Bishop
  • 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