Patents by Inventor Herbert W. Lloyd

Herbert W. Lloyd 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).

  • Sintered powder metal friction material
    Patent number: 4391641
    Abstract: An iron-base, sintered powder metal friction material suitable for railroad braking is disclosed. The friction material comprises, by volume, 10-70% carbon; 0-2.5% sulfur; 0-10% alumina; 1-45% of a metal powder additive selected from the group consisting of copper, manganese, ferrochrome, chrome carbide compounds and mixtures thereof; and the balance iron. In preferred embodiments, the powder metal additives are 11-25% copper, or 9-15% manganese, or 5-20% ferrochrome.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: July 5, 1983
    Assignee: Abex Corporation
    Inventor: Herbert W. Lloyd