Patents by Inventor Colin G. Smith

Colin G. Smith 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).

  • Production of thin flat articles with hardened surfaces
    Patent number: 4713122
    Abstract: Thin metal articles of pre-determined shape are given a first treatment to provide a hardened surface and a second treatment to correct distortion caused by the hardening treatment. The hardening is provided an epsilon nitride layer and the corrective treatment is a heat treatment at 150.degree. to 600.degree. C., which will correct the distortion without reducing the hardness of the epsilon nitride layer.
    Type: Grant
    Filed: March 18, 1986
    Date of Patent: December 15, 1987
    Assignee: Lucas Industries Public Limited Company
    Inventors: Cyril Dawes, Colin G. Smith
  • Corrosion resistant steel components and method of manufacture thereof
    Patent number: 4563223
    Abstract: To impart good salt spray corrosion resistance to alloy steel components, such components are gas nitrocarburized at 550.degree. C. to 800.degree. C. to produce an epsilon layer, oxidized to produce an Fe.sub.3 O.sub.4 layer not more than 1 micrometer thick, quenched into an oil/water emulsion, degreased and then wax coated. The steel components may be surface finished after nitrocarburizing.A carburizing, carbonitriding or neutral atmosphere heat treatment may be effected prior to nitrocarburizing heat treatment with both heat treatments being effected at above the pearlite to austenite transformation temperature.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: January 7, 1986
    Assignee: Lucas Industries
    Inventors: Cyril Dawes, John D. Smith, Colin G. Smith