Patents by Inventor Andrew Keith Bowskill

Andrew Keith Bowskill 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).

  • Patent number: 6783568
    Abstract: A sintered steel and a method for the manufacture thereof are described, the sintered steel being made by a method comprising the steps of providing a first pre-alloyed steel powder having a composition comprising in weight %: C 0.5-2, Cr 3.5-6, (2 Mo+W) 12-22, V 0.5-5, Co 0-12, Mn 0.1-0.5, Si 0.1-0.6, Fe balance apart from incidental impurities; providing a second pre-alloyed steel powder having a composition comprising in weight %: C 0.3-0.7, Cr 3-5.5, Mo 1-2.5, V 0.3-1.5, W 0-2, Mn 0.1-0.6, Si 0.8-1.2. Fe balance apart from incidental impurities; mixing together from 2 to 50 weight % of the first pre-alloyed steel powder with 98 to 50 weight % of the second pre-alloyed steel powder optionally up to 60 weight % of an iron powder and with carbon powder such that the final carbon content of the matrix of the sintered steel powder is a maximum of 1.1 weight %1; compacting the mixture and sintering to form the sintered steel.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: August 31, 2004
    Assignee: Federal-Mogul Sintered Products Limited
    Inventors: Andrew Keith Bowskill, Charles Grant Pumell, Iain Robert Whitaker