Patents by Inventor Earl H. Canfield

Earl H. Canfield 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).

  • Plain bearing
    Patent number: 4005915
    Abstract: A plain bearing and bearing-supported member of hardened steel for high load, low speed, use, especially suitable in wet environments and requiring little or no lubrication. Bearing surfaces are nitrided and steam tempered, and have a low friction, corrosion, and wear resistant oxide surface on a hardened case.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: February 1, 1977
    Assignee: Wellington Machine Co.
    Inventor: Earl H. Canfield