Patents by Inventor Larry Hum

Larry Hum 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).

  • Publication number: 20070213781
    Abstract: A body implantable retaining assembly for forming an electrical or mechanical connection between a medical device and a lead is discussed herein. A first bore is formed in a housing of the device for receiving a lead terminal portion. A second bore is also formed in the device housing, which opens to the first bore and to an exterior housing surface. A retaining assembly is mounted within the second bore and is positioned to align with a lead terminal pin or a lead terminal ring. The retaining assembly is adjustable by an instrument, thereby allowing engagement and securing of the lead and the housing. A seal member provides electrical and fluid isolation of the retaining assembly from bodily fluids located proximate to the housing exterior surface. The seal member is disposed in the second bore between the retaining means and the exterior housing surface and includes a lubricated passage therethrough.
    Type: Application
    Filed: March 10, 2006
    Publication date: September 13, 2007
    Inventors: Benjamin Fruland, Larry Hum, Lawrence Swanson
  • Publication number: 20050267557
    Abstract: A lead having an extendable and retractable fixation mechanism has a rotating terminal pin at the terminal end which rotates the fixation mechanism at the distal end. As the terminal pin is rotated, the fixation mechanism is extended or retracted from the distal end of the lead. A threaded collar allows for the fixation mechanism to smoothly extend and retract from the lead, and allows for a 1:1 turn ratio between the terminal pin and the fixation mechanism. A fluoroscopic ring disposed at the distal end of the lead provides information during the implantation process.
    Type: Application
    Filed: July 1, 2005
    Publication date: December 1, 2005
    Inventors: David Flynn, Michael Brenzel, Jason Skubitz, Larry Hum, Carol Werlein, Christopher Knapp, Gregory Ley, Jason Shiroff, Brian Soltis
  • Publication number: 20050085885
    Abstract: A seal adapted for use with medical devices is provided with a lead having a distal tip electrode. The distal tip of the lead is adapted for implantation on or about the heart and for connection to a system for monitoring or stimulating cardiac activity. The lead can include a fixation helix for securing the electrode to cardiac tissue. The lead assembly can alternatively include an open lumen lead tip. A seal is provided within the lead tip assembly such that the seal is expanded to prevent or limit further entry of fluids through the lead tip. The seal includes an expandable matrix, such as a hydrogel. The seal is formed on or within the lead when the lead and the seal comes into contact with a fluid and expands. The seal is also formed as a plug which is deployed through the medical device, and expands as the plug absorbs fluid. A housing incorporating the seal can also be attached to a portion of the medical device to provide the seal.
    Type: Application
    Filed: October 20, 2004
    Publication date: April 21, 2005
    Inventors: Aaron Janke, Larry Hum, Randy Westlund, Ronald Heil, Bruce Tockman
  • Patent number: 5899930
    Abstract: A triple port and quadruple port header assembly of an implantable tissue stimulator, such as a pacemaker, defibrillator, or nerve stimulator, wherein three or more sensing and/or pacing leads may be coupled thereto. Ports of the header assembly receive the terminal end of corresponding leads, wherein each port has two terminal blocks positioned therein which are adapted for coupling a pin and/or ring of the terminal end of the corresponding lead. Feedthrough wires electrically couple the terminal blocks to the electronic circuit of the implantable tissue stimulator, and jumper wires electrically couple the terminal blocks of at least two ports, thereby electrically coupling the corresponding pins and/or rings of at least two leads contained therein.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: May 4, 1999
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David M. Flynn, Andra Thomas, Larry Hum