Patents by Inventor Lenard L. Lawrence

Lenard L. Lawrence 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: 4579060
    Abstract: Railroad right-of-way maintenance equipment and method for removing old ties from beneath railroad rails and replacing them with new ties, characterized by a compound clamping head. The compound clamping head simultaneously grips a new tie and an old tie while withdrawing the old tie from beneath the rails, releases or discards the old tie at the end of the withdrawal stroke, and inserts the new tie in place of the old on the consecutive reciprocal return stroke. The invention also includes a kick-out feature for moving the old tie beyond the end of the withdrawal stroke for release or discard of the old tie.
    Type: Grant
    Filed: April 6, 1983
    Date of Patent: April 1, 1986
    Assignee: Loram Maintenance of Way, Inc.
    Inventors: Frank J. Nameny, Lenard L. Lawrence