Patents by Inventor William L. Dumar, Jr.

William L. Dumar, Jr. 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).

  • Ball joint flexible wear ring and seal
    Patent number: 4343499
    Abstract: A ball joint has a flange and nut with matching spherical surfaces in the seal area of the joint. A frusto-conical wear ring seals between the matching surfaces with an inner and an outer line of contact between the ring and the surfaces to provide a spring type seal.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: August 10, 1982
    Assignee: The Boeing Company
    Inventors: William L. Dumar, Jr., Jimmie E. Ledlow