Multi-compartment aerial duct
a multi-compartment, aerial duct technology, applied in the direction of cables, insulated conductors, conductors, etc., can solve the problems of high friction between the cable and the tube, the cable cannot be installed, and the cable is expensive to ship and install, so as to achieve the effect of convenient carrying by the utility pol
Inactive Publication Date: 2005-06-30
ALLEN JERRY L
View PDF37 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0006] It is thus an object of the present invention to provide a duct which can readily be carried by utility poles or the like and which is formed with one or more pockets of a pliant or flexible material.
[0009] It is an additional object of the present invention to provide a duct, as above, which is lightweight and easy to install.
[0010] It is yet another object of the present invention to provide a duct, as above, which is of a material having a low coefficient of friction so that longer portions of cables may be pulled therethrough.
Problems solved by technology
However, because of their density and weight, it is only feasible to provide a limited length of the tubing on a reel.
Moreover, because of its weight, the tube is expensive to ship and install.
In particular, the high coefficient of friction between the cable and the tube precludes the installation of the cable by means of long pulls.
Most significantly, the prior art aerial ducts are only designed to hold one cable.
Thus, if after a cable is pulled through the system and is in use, if more communication capacity is needed, an additional cable cannot readily be pulled through the same tube.
While such is possible, all of the problems discussed above are compounded in that it is very difficult and time consuming to attempt to pull a second cable into a tube that already has one cable randomly positioned therein.
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] A duct which is especially suited for aerial applications is indicated generally by the numeral 10. Duct 10 includes a plurality of thin, pliant layers of material, three layers 11, 12, and 13 being shown by way of example. Layers 11, 12 and 13 extend in a longitudinal direction potentially for several thousand feet, and such a length of duct 10 may be stored on a reel for ease of shipment and installation. Layer 11 includes spaced lateral edges 14, 15, layer 12 includes spaced lateral edges 16, 17, and layer 13 includes spaced lateral edges 18, 19.
[0030] Layers 11, 12 and 13 may be attached near their lateral edges 14, 16 and 18, respectively, as by stitching 20 or the like. While stitching is the preferred manner to attach layers 11, 12 and 13, it should be evident, dependent on the precise material selected for layers 11, 12 and 13, that other forms of attachment such as heat fusing, ultrasonic welding, or the like could be employed.
[0031] As shown, it is preferable that...
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
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| strength | aaaaa | aaaaa |
Login to View More
Abstract
A duct (10) is made up of a plurality of layers (11, 12, 13) of pliant material. The layers (11, 12, 13) are attached by stitching (20, 22) to form pockets (23, 24) between adjacent layers. One of the layers (11) is wider than the others and extends over the lateral edges (17, 19) of those layers (12, 13), and when the stitching (22) is applied, a loop (21) is formed. The loop (21) receives a strength member (26) which may be engaged by a clamp (31) carried by a bracket (34) which may be attached to a utility pole (30) to carry the duct (10) overhead. In another embodiment, a duct (40) includes enclosed loops (41, 42, 43) forming pockets (50, 51, 52). Stitching (54) connects the loops (41, 42, 43) and forms another loop (55) to receive a strength member (56). In yet another embodiment, the layers (61, 62, 63 and 64) are of different lateral widths, and the longest layer (64) extends around one of the edges of the other layers (61, 62, 63) to form a loop (71) when stitching (65) is applied. The loop (71) receives the strength member (73).
Description
CROSS-REFERENCE TO RELATED APPLICATION [0001] This application is a continuation of U.S. patent application Ser. No. 10 / 401,222 filed Mar. 27, 2003, which claimed the benefit of U.S. Provisional Patent Application Ser. No. 60 / 368,317 filed Mar. 29, 2002.TECHNICAL FIELD [0002] This invention relates to a duct which is adapted to be carried overhead by utility poles or the like and which can itself carry multiple communication cables or the like in separate compartments. BACKGROUND ART [0003] Conduits or ducts which are designed to carry communication and other cables or the like are typically either buried in a network formed in the ground or carried overhead by utility poles. The aerial system is far less expensive to install and maintain, and thus, where utility poles are available, it is the preferred system. [0004] Known aerial ducts merely consist of a tube, usually formed of some high tensile strength plastic material, such as high density polyethylene, which can be attached to...
Claims
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
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityApplications(United States)
IPC IPC(8): H02G7/05H02G1/02H02G7/06
CPCH02G3/0487H02G7/16H02G7/053
InventorALLEN, JERRY L.
OwnerALLEN JERRY L