Patents by Inventor Michael Gauna

Michael Gauna 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).

  • Yield tube bolt assembly
    Patent number: 4954018
    Abstract: This invention relates to a rib bolt assembly including a collapsible yield device located between an exposed end of the rib bolt and a side of a mine pillar in which the collapsible yield device will withstand a predetermined torque but will collapse at a stress less than the failure strength of the rib bolt.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: September 4, 1990
    Assignee: Jim Walter Resources, Inc.
    Inventor: Michael Gauna