Patents Assigned to Thormack Engineering Limited
  • Grit blasting apparatus
    Patent number: 4165587
    Abstract: A method and apparatus for grit blasting in which fuel and air are combusted in a flashback combustion chamber to produce a high velocity gas blasting jet and a stream of grit is introduced into the blasting jet.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: August 28, 1979
    Assignee: Thormack Engineering Limited
    Inventors: Richard L. Cottingham, Ralph A. Boyne