Patents by Inventor Karl S. Springborn

Karl S. Springborn 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).

  • Process and apparatus for the manufacture of sintered tungsten carbide tool tips
    Patent number: 4340350
    Abstract: A press for cold-forming granular tungsten carbide cutting tool edge blanks for sintering, it has helical edges on jaws which open and close around a center pin and are of a depth which allows for shrinkage during sintering, top, bottom and side members seal the forming cavity; a grahite sinter fixture has similarly-shaped forming and sealing components to the press but relies only on gravitational surface reaction to close components against a pressed blank to prevent shrinkage distortion during sintering.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: July 20, 1982
    Assignee: Austung Proprietary Limited
    Inventor: Karl S. Springborn
  • Process and apparatus for the manufacture of sintered tungsten carbide tool tips
    Patent number: 4303416
    Abstract: A press for cold-forming granular tungsten carbide cutting tool edge blanks for sintering, it has helical edges on jaws which open and close around a center pin and are of a depth which allows for shrinkage during sintering, top, bottom and side members seal the forming cavity; a graphite sinter fixture has similarly-shaped forming and sealing components to the press but relies only on gravitational surface reaction to close components against a pressed blank to prevent shrinkage distortion during sintering.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: December 1, 1981
    Assignee: Austung Proprietary Limited
    Inventor: Karl S. Springborn