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Conduit innerduct having reduced friction and high strength

A technology of low friction coefficient and pipeline, applied in the structure of fabric pull rope, inner tube or pull rope, which can solve the problem of sacrificing the ease of pull rope

Inactive Publication Date: 2013-07-24
WESCO DISTRIB INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, prior art materials for such cords provide this tensile strength at the expense of ease of cord movement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Conduit innerduct having reduced friction and high strength
  • Conduit innerduct having reduced friction and high strength
  • Conduit innerduct having reduced friction and high strength

Examples

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Embodiment Construction

[0021] The inner pipe housed in the underground pipeline and made according to the invention is generally indicated by the numeral 10 . The inner tube 10 is preferably made of a fabric material and may be of the type described in US Patent No. 6,262,371, to which reference any detail may be necessary to fully understand the invention.

[0022] The inner tube 10 is shown to consist of a plurality of chambers generally indicated by numerals 11 , 12 and 13 . However, many times such an inner tube may have only one chamber or may have any number of chambers therein, such as the three chambers shown in the figures. The chamber 11 is formed of a fabric material 14 whose ends are joined by stitching 15 to form a compartment 16 for accommodating cables or similar objects. The chamber 12 is formed of a fabric material 17 whose ends may be joined by the same stitches 15 that join the ends of the material 14 of the chamber 11 . As such, a compartment 18 is formed within the cavity 12 t...

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Abstract

A device adapted to be for inserted into a conduit includes a first fabric material having a high tensile strength and a second fabric material having a low coefficient of friction. The materials are attached to each other to form an innerduct. A third fabric material of a low coefficient of friction may be attached to the first material to provide an innerduct whose outer surfaces present a low coefficient of friction. An innerduct or pull tape may also be formed by strands having an inner core of a high tensile strength and an outer sheath having a low coefficient of friction. The strands may be woven together to form the innerduct or pull tape.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application Serial No. 61 / 403806, filed September 23, 2010, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to the construction of a fabric inner pipe to be placed in an underground pipeline and adapted to accommodate cables or other objects therein. The invention also relates to the construction of a fabric pull cord for pulling cables into ducts. More particularly, the present invention relates to inner tubes or drawstrings constructed from a fabric system that reduces friction when the inner tube or drawstring is inserted into a conduit. Furthermore, the fabric system makes it easier to insert the cable into the inner tube and at the same time increases the tensile strength of the inner tube. Background technique [0004] Fabric inner tubes such as those shown in US Patent No. 6,262,371 have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G3/04
CPCH02G3/0487H02G3/04
Inventor J·L·艾兰
Owner WESCO DISTRIB INC
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