Patents by Inventor Miranda J. Bull, administrator

Miranda J. Bull, administrator 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).

  • Rehabilitation of pipelines and passageways with a flexible liner using an inflatible bladder
    Patent number: 5706861
    Abstract: An assembly which can be inserted into a pipeline or passageway on which a curable resin impregnated flexible lining is placed about an inflatable bladder is provided. The bladder is mounted to one end of a core pipe and folded over on itself. Medium flowing in the pipeliner passageway can pass through the core pipe during a lining operation. The core pipe is of sufficiently rigid nature to withstand inflation pressure to move the lining tube into the pipeliner passageway surface by inflation of the bladder, but yet is sufficiently flexible and bendable so as to bend enabling it follow curbs and falls in the pipeliner passageway into which it is inserted. Temporary holding means restrain the liner during insertion.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: January 13, 1998
    Assignee: Insituform (Netherlands) B.V.
    Inventors: Eric Wood, deceased, Miranda J. Bull, administrator