Patents by Inventor Frank G. Borgardt

Frank G. Borgardt 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).

  • Captive volume device as a safe life monitor
    Patent number: 4821671
    Abstract: A captive volume device containing a small amount of solid propellant and a safe life indicator such as a colorimeter material or a differential pressure sensor. As the propellant deteriorates, it expends a gas which changes the color of the colorimeter material or causes the differential pressure sensor to alter its position, indicating that the propellant material is useless.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: April 18, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Frank G. Borgardt
  • Fully consumable remotely operated seal
    Patent number: 4402516
    Abstract: A method for sealing ports, ducts and the like using a fully consumable mrial as the sealing medium and utilizing the consumable capability to provide remote removal of the seal without damage to the sealed areas and with no remaining obstruction in the port, duct or the like. The fully consumable seal may be configured to the geometry of the aperture to be sealed and has thickness determined by pressure difference across the seal and time required to remove the seal.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: September 6, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Werner A. Gans, Frank G. Borgardt, George A. Lo