Patents by Inventor Gerald A. Armfield

Gerald A. Armfield 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).

  • Cylinder sleeve assembly
    Patent number: 5970844
    Abstract: A cylinder sleeve is composed of multiple identical interlocking sleeve elements. Each sleeve element has a circular cylindrical portion and an integral circular arc portion tangent to the cylindrical portion. The circular arc portion has a boss on one end and an offset finger on the other which mates with the boss of an adjacent sleeve element to fix the adjacent sleeve elements together radially.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: October 26, 1999
    Assignee: Thomas Industries, Inc.
    Inventors: William H. Lynn, Paul J. Thomas, Gerald A. Armfield