Patents by Inventor James J. Christenson

James J. Christenson 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).

  • Patent number: 7231253
    Abstract: An implantable medical device (IMD) includes a connector header for making electrical and mechanical connections with a proximal connector assembly of an electrical medical lead and includes a retainer for retaining a penetrable grommet within a header grommet aperture. A connector block disposed within a header body of the connector header has a threaded bore aligned with a header grommet aperture and a connector block bore aligned with a header connector bore. The penetrable grommet is disposed within the header grommet aperture, and a setscrew is threaded into the threaded bore having a setscrew socket disposed to be engaged by a tool inserted through the penetrable grommet within the header grommet aperture to enable rotation of the setscrew within the threaded bore to tighten the setscrew against or to loosen the setscrew from a lead connector element received in the header connector bore.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: June 12, 2007
    Assignee: Medtronic, Inc.
    Inventors: Kevin K. Tidemand, Daniel C. Haeg, Craig L. Wiklund, James F. Kelley, Jennifer J. Zhao, Andrew J. Ries, David C. Rice, Hui J. Jin, James J. Christenson, Loc Van Vo
  • Publication number: 20040122481
    Abstract: Improvements in connector headers of implantable medical devices (IMDs) for making electrical and mechanical connections with a connector element of a proximal connector assembly of an electrical medical lead and components thereof are disclosed. A connector block disposed within a header body of the connector header has a threaded bore aligned with a header grommet aperture and a connector block bore aligned with a header connector bore. A penetrable grommet is disposed within the header grommet aperture, and a setscrew is threaded into the threaded bore having a setscrew socket disposed to be engaged by the tool inserted through the penetrable grommet within the header grommet aperture to enable rotation of the setscrew within the threaded bore to tighten the setscrew against or to loosen the setscrew from a lead connector element received in the header connector bore.
    Type: Application
    Filed: December 11, 2003
    Publication date: June 24, 2004
    Inventors: Kevin K. Tidemand, Daniel C. Haeg, Craig L. Wiklund, James F. Kelley, Jennifer J. Zhao, Andrew J. Ries, David C. Rice, Hui J. Jin, James J. Christenson, Loc Van Vo
  • Patent number: 6430442
    Abstract: A construction and method are employed for connecting leads and extensions that minimizes the need for set screws, and the times and physical efforts required of surgeons for connecting leads and connector blocks is reduced. An improved electrical and mechanical connector for the conductor comprises at least two components. First a multi-piece body forms a receptor for the conductor. At least one of the body pieces is electrically conductive. Second, an elastic member retains together the body pieces of the multi-piece body. The elastic member biases the body pieces into mechanical, restraining contact with the conductor, and biases the electrically conductive body piece into electrical contact with the conductor, when the conductor is introduced into the receptor. The elastic member further elastically yields under mechanical force to permit introduction of the conductor into the receptor.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: August 6, 2002
    Assignee: Medtronic, Inc.
    Inventors: Charles E. Peters, James J. Christenson