Patents by Inventor Leonard D. Plagens

Leonard D. Plagens 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).

  • Antifriction bearing assembly for a die set or the like
    Patent number: 4648727
    Abstract: An antifriction ball bearing assembly features a tubular, cylindrical ball retainer or cage which is carried for both reciprocating and rotational movement on an associated shaft or bushing member by means of a key or slide member which is slidable in an axial or longitudinal groove formed in the shaft or bushing and which projects radially into an annular groove formed in the bearing retainer.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: March 10, 1987
    Assignee: Lempco Industries, Inc.
    Inventors: Junior O'Neil, Leonard D. Plagens