Patents Assigned to Electrophysikaische Anstalt Bernard Berghaus
  • Components of a rotary piston machine
    Patent number: RE28918
    Abstract: The friction surface of a cast iron side wall member for a rotary piston engine is hardened by iontriding in an electrical glow discharge in a gas atmosphere containing nitrogen, after coating the areas not to be hardened, to inhibit glow discharge at those areas.
    Type: Grant
    Filed: March 11, 1974
    Date of Patent: July 27, 1976
    Assignee: Electrophysikaische Anstalt Bernard Berghaus
    Inventor: Gerhard Philipp Humbert