Patents by Inventor Dennis W. Holmes

Dennis W. Holmes 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).

  • Patent number: 4785692
    Abstract: A tool for driving wooden plugs in spike holes of railroad ties following removal of railroad spikes from the wooden tie prior to track regauging and/or replacement. An elongated main body rod of steel is provided having a permanently affixed collar or washer at one extreme end thereof and another permanently affixed collar or washer approximately midway thereof. Slidably mounted between the two collars is a hand-operated driving weight. The other end of the elongated rod has a reduced rod extension portion which has a slidable plug holding sleeve thereon. The extreme tip of this other end is threaded and receives an adjusting nut on the threads for predetermining the desired depth of wooden plug driving into a railroad tie.
    Type: Grant
    Filed: September 12, 1986
    Date of Patent: November 22, 1988
    Inventor: Dennis W. Holmes