Sewer pipe section

Pipes and tubular conduits – Repairing – Patches

Reexamination Certificate

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Details

C138S109000, C138S141000, C138S155000

Reexamination Certificate

active

06920900

ABSTRACT:
A pipe section for lining sewer pipelines along with a system of such pipe sections and method of lining a sewer pipeline are provided. The pipe section has a first end portion having a spigot. A protective ring is mounted around the spigot for transferring a load to the pipe section for axially moving the pipe section within a sewer pipeline. A second end portion of the pipe section is designed for surrounding the spigot of an adjacent pipe. A seal is formed is formed around the spigot for sealing with the second end portion of the adjacent pipe section.

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patent: 4268047 (1981-05-01), Tashlick
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patent: 4796669 (1989-01-01), St. Onge
patent: 5148835 (1992-09-01), Clark
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patent: 5316352 (1994-05-01), Smith
patent: 5458155 (1995-10-01), Stephens
patent: 5499660 (1996-03-01), StorgArd
patent: 5662360 (1997-09-01), Guzowski
patent: 5785092 (1998-07-01), Friedrich et al.
patent: 5799705 (1998-09-01), Friedrich et al.
patent: 6176523 (2001-01-01), Winslett
patent: 6179945 (2001-01-01), Greenwood et al.

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