Patents by Inventor Karnarnadakala D. Krishnanand

Karnarnadakala D. Krishnanand 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).

  • Surgical instruments having improved wear resistance, and methods of making the same
    Patent number: 9687302
    Abstract: A surgical apparatus includes a cannula and a surgical instrument. The cannula includes a curved longitudinal axis along at least a portion of its length. The surgical instrument includes an elongated shaft having a distal end and a proximal end, and an end effector coupled to the distal end of the elongated shaft. At least a portion of the end effector is configured to contact an inner surface of the cannula during insertion of the surgical instrument into the curved cannula. A threshold galling stress between the portion of the end effector and an inner surface of the curved cannula is at least 10,000 pounds per square inch.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: June 27, 2017
    Assignee: INTUITIVE SURGICAL OPERATIONS, INC.
    Inventors: Samuel T. Crews, Andrew Crews, Edward P. Donlon, Craig Gerbi, Kenneth L. Gong, Karnarnadakala D. Krishnanand, Peling Lee, Theodore W. Rogers, John Ryan Steger, Charles E. Swinehart