Patents Assigned to North American Royalties, Inc.
  • Method of static casting composite brake drum
    Patent number: 6109334
    Abstract: A mold with a cylindrical sidewall, is provided. A shell is positioned around the sidewall. The shell is heated to between 500 and 1,000 F. Molten iron alloy between 2550 and 2650.degree. F. is poured into the mold. The resulting composite brake drum is cooled and cleaned. The method of casting includes positioning a brake drum shell around a mold defining a cavity interior of the shell, heating the shell, pouring molten iron alloy into the mold to fill the cavity and cooling and cleaning the composite brake drum.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: August 29, 2000
    Assignee: North American Royalties, Inc.
    Inventor: David W. Phipps