Patents by Inventor John M. Beswick

John M. Beswick 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).

  • Steel for ball and roller bearings
    Patent number: 5261975
    Abstract: Steel for ball and roller bearings and similar applications, containing, in % by weight:______________________________________ 0.70-0.95% Carbon 0.01-0.30% Silicon 0.15-0.50% Manganese 0.5-2.5% Chromium 0.10-1.5% Molybdenum max. 0.25% Vanadium ______________________________________the rest up to 100% being iron and other residual elements normally present in steel, andwith the further proviso that the total area percentage of oxide inclusions must not exceed 0.0012%, that the area percentage of titanium-carbonitrides must not exceed 0.0015%, and that the area percentage of sulphide inclusions must not exceed 0.030%, the respective area percentages being measured according to the inclusion rating method defined in the Swedish Standard SS111116, wherein the field of vision shall be 0.8 mm and the number of fields of vision to be surveyed shall be at least 1000.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: November 16, 1993
    Assignee: AB SKF
    Inventors: Per-Olof Sorstrom, Thore Lundh, John M. Beswick, Frank Hengerer
  • Steel with a composition of iron, carbon, silicon, phosphorus and molybdenum
    Patent number: 4961904
    Abstract: A steel composition containing iron, carbon, silicon, phosphorus and molybdenum, comprised of about 0.85-0.95 percent by weight carbon, up to about 0.1 percent by weight silicon, up to about 0.015 percent by weight phosphorus, about 0.20-0.4 percent by weight molybdenum, with the remainder percent by weight being iron.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: October 9, 1990
    Assignee: SKF Industrial Trading & Development Co. B.V.
    Inventor: John M. Beswick
  • Steel with a composition of iron, carbon, silicon, phosphorus and molybdenum
    Patent number: RE34278
    Abstract: A steel composition containing iron, carbon, silicon, phosphorus and molybdenum, comprised of about 0.85-0.95 percent by weight carbon, up to about 0.1 percent by weight silicon, up to about 0.015 percent by weight phosphorus, about 0.20-0.4 percent by weight molybdenum, with the remainder percent by weight being iron.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: June 8, 1993
    Assignee: SKF Engineering & Research Center B.V.
    Inventor: John M. Beswick