Patents Assigned to Austung Proprietary Limited
  • 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