Sewer pipe relining method
Patent 4954016 Issued on September 4, 1990. Estimated Expiration Date: 
March 9, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 9, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3233315 Method of and apparatus for laying a pipe-line Sewer renovation system Method for the installation of plastic pipes in sewage piping Methods of renovating sewers Product for relining sewers and water pipes Patent #: 4796669 InventorAssigneeApplicationNo. 320999 filed on 03/09/1989US Classes:405/184, Advancing subterranean length of pipe or cable138/97, REPAIRING285/15, REPAIR285/55, Lined405/150.1, Lining405/184.2Installing linerExaminersPrimary: Reese, Randolph A.Assistant: Ricci, John A. Attorney, Agent or FirmForeign Patent References
International ClassesF16L 055/18F16L 009/22 E03F 003/06 Foreign Application Priority Data1988-04-13 CAAbstractThe present invention discloses apparatus and methods for relining sewer mains without excavation. The sewer main is accurately measured and pre-selected short sections of reliner pipe are inserted one at a time. Visual equipment and manipulative apparatus is provided which will orient lateral openings with lateral drains. The orientation sealing and grouting of the reliner pipe can be conducted after insertion so that crews can move ahead with relining other sections of the sewer. | |
