Patents by Inventor David E. Havel

David E. Havel 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).

  • Pin retainer for dragline pins
    Patent number: 9163378
    Abstract: A locking device that connects to a grooved end of a dragline pin includes a lock block and a lock pin. The lock block has a through opening sized to receive the end of the pin. There is a bore formed in the lock block and transversely intersecting the through opening which is dimensioned to receive the lock pin. The lock pin is configured to pass through a portion of the grooved end of a received dragline pin received in the through opening to lock the dragline pin and any attached dragline component.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: October 20, 2015
    Assignee: Columbia Steel Casting Co., Inc.
    Inventors: Stephen P. Doan, David E. Havel, Brian C. Matlock