Patents by Inventor Mirrel L. Totman

Mirrel L. Totman 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: 4294275
    Abstract: The nut is for repairing leaking bolt holes in flanged pipe joints by means of a closed-end nut having a sharp circular projection on its open end. When this sealing nut is substituted for existing nuts on bolts in the flanged joint and tightened, the nut, which is hardened, cuts a circular groove in the face of the flange that makes a metal-to-metal seal to close leaks at bolt holes. The bolts may be same diameter as the existing bolts and may be installed one at a time to accomplish the repair without reducing pressure in the pipe. Leakage from between the flanges at their perimeter is closed off by sealing in a conventional manner by welding a band around the perimeter of the flanges before the bolt hole sealing is started.
    Type: Grant
    Filed: April 13, 1979
    Date of Patent: October 13, 1981
    Assignee: Totman Seal Nut, Inc.
    Inventor: Mirrel L. Totman