Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Moving cable within pipe
Reexamination Certificate
2002-11-22
2008-03-11
Mayo, Tara L (Department: 3671)
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Moving cable within pipe
C405S184400, C138S178000, C248S058000, C248S062000
Reexamination Certificate
active
07341403
ABSTRACT:
The object is to provide a construction method of an information-communicable underground pipe whereby communication cables can be readily laid in an underground pipeline having a main pipe and branch pipes branched therefrom thereby allowing the underground pipeline to be used as an information-communicable underground pipe, and to provide a construction structure and a construction member therefor. The construction method of an information-communicable underground pipe comprises inserting a sheath pipe (1) into an underground pipeline (17, 7) through a manhole (9, 10), the sheath pipe having a main body (3) formed with an empty room (2) for installing a communication cable (6) thereinto and a high-strength low-elongation material element (4) integrally formed in the main body (3) along the length of the main body (3), and securing the high-strength low-elongation material element (4) onto the inner wall of said manhole (9, 10) by applying tension thereon to secure the sheath pipe (1) in the substantially upper part inside the underground pipeline (17, 7).
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Aso Koji
Hirokawa Takaaki
Ishizuka Osamu
Maemoto Yukikazu
Nakatsuka Hirofumi
Ashimori Engineering Co., Ltd.
Ashimori Industry Co. Ltd.
Mayo Tara L
Sanki Engineering Co., Ltd.
Wolf Greenfield & Sacks P.C.
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