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Title:
BURIED PIPE
Document Type and Number:
WIPO Patent Application WO/2023/021566
Kind Code:
A1
Abstract:
A buried pipe 1 (1a, 1b, 1c) comprises a first inner pipe 12 which can accommodate a cable 9, a second inner pipe 11 which accommodates the first inner pipe 12, and an outer pipe 10 which accommodates the second inner pipe 11, wherein the second inner pipe 11 is rotatable about a central axis L of the first inner pipe 12, with respect to the first inner pipe 12 and the outer pipe 10.

Inventors:
NISHIYAMA DAISAKU (JP)
HIYOSHI KENJI (JP)
ITO AKIRA (JP)
ITASAKA KOJI (JP)
Application Number:
PCT/JP2021/029949
Publication Date:
February 23, 2023
Filing Date:
August 16, 2021
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H02G9/06
Foreign References:
JP2018536126A2018-12-06
JP2002199531A2002-07-12
JP2014062586A2014-04-10
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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