Patents Represented by Attorney Cowan, Liebowitz and Latman, P.C.

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  • Method of lining a host pipe with a liner by diameter reduction with angularly offset rollers
    Patent number: 5626801
    Abstract: A method is shown for lining a host pipe with a polyolefin liner having an outside diameter which is initially greater than the inside diameter of the host pipe. A length of the liner is cryogenically cooled to a supercooled state to reduce the outside diameter of the liner and to maintain the downsized dimensions of the liner while increasing the tensile strength to facilitate insertion of the liner into the host pipe.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: May 6, 1997
    Assignee: Pipe Rehab International, Inc.
    Inventors: Jim S. McMillan, Simon Tarsha