Patents by Inventor Bruce Deyo

Bruce Deyo 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).

  • Hoist pull down system for blast hole drill
    Patent number: 4434860
    Abstract: A chain-type hoist pull down system for a large blast hole drilling rig is provided which includes an auxiliary tensioning mechanism to increase the tension of the pull down chain during selected operating modes. In the preferred embodiment the auxiliary tensioning mechanism comprises a single acting hydraulic cylinder suspended between an idler sprocket and a spring loaded resilient mounting. A simple circuit for automatically actuating the auxiliary tensioning mechanism at the required time is also provided.
    Type: Grant
    Filed: December 2, 1981
    Date of Patent: March 6, 1984
    Assignee: Dresser Industries, Inc.
    Inventor: Bruce Deyo