Articulated lead for trenchless pipe replacement

Details Articulated lead for trenchless pipe replacement Articulated lead for trenchless pipe replacement

2008-06-24

2008-06-24

Lagman, Frederick L (Department: 3672)

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Repair, replacement, or improvement

C405S184100, C405S156000, C138S097000

Reexamination Certificate

active

07390143

ABSTRACT:
Trenchless pipe replacement apparatus equipped with articulated lead sections that flex and accommodate an irregular path of an old pipe line. The articulated lead sections are coupled together by a flexible joint that allows the lead section assembly to flex and follow the path of the old pipe line that may be irregular due to misaligned pipe sections, dropped joints and other irregularities.

REFERENCES:
patent: 4848964 (1989-07-01), Yarnell
patent: 5192165 (1993-03-01), Torielli
patent: 5482404 (1996-01-01), Tenbusch, II
patent: 5816745 (1998-10-01), Tenbusch, II
patent: 6585453 (2003-07-01), Robinson
patent: 6588983 (2003-07-01), Tenbusch, II

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