IE922590A1 - Empty conduit with detachable cable assembly and method of¹making same - Google Patents
Empty conduit with detachable cable assembly and method of¹making sameInfo
- Publication number
- IE922590A1 IE922590A1 IE259092A IE922590A IE922590A1 IE 922590 A1 IE922590 A1 IE 922590A1 IE 259092 A IE259092 A IE 259092A IE 922590 A IE922590 A IE 922590A IE 922590 A1 IE922590 A1 IE 922590A1
- Authority
- IE
- Ireland
- Prior art keywords
- cable
- conduit
- accordance
- improvement
- original
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 8
- 238000004891 communication Methods 0.000 claims abstract description 23
- 239000013307 optical fiber Substances 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 abstract description 13
- 238000001125 extrusion Methods 0.000 abstract description 6
- 229920000573 polyethylene Polymers 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
- H02G1/08—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/22—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals
- F16L3/237—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals for two pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/26—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting the pipes all along their length, e.g. pipe channels or ducts
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4459—Ducts; Conduits; Hollow tubes for air blown fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0072—Electrical cables comprising fluid supply conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/38—Insulated conductors or cables characterised by their form with arrangements for facilitating removal of insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
- H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Details Of Indoor Wiring (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
- Joints Allowing Movement (AREA)
Abstract
An empty conduit (12) with a communication cable (10) of one type detachably connected to the outer wall (14) of the conduit can be installed in a conventional manner but also enables the future installation of one or more further communication cables (20), particularly of a different type, within the conduit. The detachable connection may be effected by, for example, a frangible surrounding jacket (24), a frangible web (26, Fig 3 not shown) or a pair of resilient extensions (28, Fig 4 not shown). The cable (10) may be electrical and the cable (20) may be an optical fibre. The conduit (12) may be pre-lubricated, of PVC or polythene and provided with a pull member (18, Figs 2-4, not shown). Cable (10) may be attached during or after extrusion of the conduit (12).
Description
This invention relates generally to communication cable systems, more particularly to cable conduit and cable assemblies, and even more particularly to cable conduit and cable assemblies with means for expanding cable capability.
Background of the Invention The continuing dynamic growth in the communications industry has resulted in the ever increasing demand for additional and different types of communication cables. For example, the initial installation of telephone cables in a particular locality is soon overloaded, with additional cable installations required to meet the expanding communications requirements in that locality. Furthermore, while the vast majority of present day telecommunication, video and data transmissions are over twisted pair telephone and coaxial cables, optical fiber cables are clearly becoming the future transmission media for the communications industry. As a consequence, it becomes imperative that existing non-optical fiber cable assembly installations incorporate assemblies which provide not only for additional future cable installations, but also the capability of installing optical fiber transmission cables in the future without the need of unearthing or replacing the initial installations.
Description of the Prior Art [ There are existing prior art systems which have ί attempted to provide this expanded cable capability. For example, U.S. Patent No. 3,862,349 discloses an underground telephone cable assembly installation in which the telephone cable is disposed inside a flexible outer housing having an outside diameter sufficiently larger than the contained telephone cable so as to . provide fop future placement of at least one additional cable, a pull wire also being installed along side of the existing cable for this future placement. U.S. Patent No. 3,383,456 discloses a flexible conduit with the electrical conductors being provided within or adjacent the conduit wall so that additional conductors j when needed may be drawn through the conduit at a later time ι without having to remove the conduit.
While these prior art systems in a broad sense enable expanded cable capability, they are not completely satisfactory and have a number of disadvantages associated therewith. For example, in addition to the fact that the existing cable or conductors are located inside the conduit and would thus interfere with the future placement of additional cables therein, as well as increasing the pulling resistance of the future cable installation, the overall construction and design of the prior art systems are deficient in many material respects.
Objects of the Invention It is therefore the principal object of this invention to provide a new and improved conduit/communication cable assembly which provides for expanded cable capability for the future.
It is a further object of the present invention to provide a new and improved conduit/communication cable assembly which enables subsequent additions or upgrades to the existing cable installation at a minimum of installation cost and a minimum of inconvenience to the customer. _ 9 _ IE 922590 It is a still further object of this invention to provide an empty cable conduit and associated communication cable assembly with new and improved means and methods for associating ι the cable with the conduit.
Summary of the Invention In accordance with the aforelisted and other objects, the present invention is directed to a conduit/communication cable . assembly in which the existing communication cable is detachably connected at the outer surface of a flexible, elongated empty cable conduit, with means provided for the future installation of one or more communication cables within the empty conduit long after the conduit/cable assembly has been installed underground. In accordance with one particular feature of the invention, the detachably connected cable is of one type, for example a twisted pair telephone cable, while the subsequently installed cable is of a different type, for example an optical fiber cable.
Specific and additional features of the invention, as well as additional objects and advantages thereof, will become readily understood by those skilled in the art from the following detailed description, taken in conjunction with the accompanying drawings .
Brief Description of the Drawings Figure 1 is a partial perspective view of a section of the conduit and original communication cable combination in accordance with the teachings of the present invention, illustrating in phantom an optical fiber cable which will be pulled through the conduit in the future; Figure 2 is a cross sectional view of the conduit and original communication cable illustrating one method of attachment of the original communication cable to the conduit; Figure 3 is a cross sectional view of the conduit and original communication cable illustrating a second method of attachment of the original communication cable to the conduit; Figure 4 is a cross sectional view of the conduit and original communication cable illustrating a third method of attachment of the original communication cable to the conduit; Figure 5 is a diagrammatical view of the conduit and cable combination, illustrating the ends of the cable having been detached or stripped from the conduit surface.
The drawings are not necessarily to scale, and certain portions may have been exaggerated to emphasize certain details of the invention.
Description of the Preferred Embodiment ; In the description which follows, like parts are indicated throughout the specification (and drawings) with the same respective reference numerals.
Referring initially to FIGURE 1 of the drawings, a cable conduit 12 having an outer wall 14 and an inner wall 16 is depicted. The cable conduit 12 is of the type conventionally known in the industry and is generally formed by the extrusion of polymeric material, such as a polyethylene or polyvinyl chloride, to form an elongated, flexible duct to serve as a protective underground housing for a communication transmission cable. One such form of conduit is currently being sold by Integral Corporation of Dallas, Texas, the assignee of thie invention, under the CABLECON trademark.
In accordance with conventional approaches, the cable conduit is buried underground with the particular transmission cable normally either already having been pre-inserted within the conduit or inserted within the conduit after the conduit is buried.
In accordance with the present invention, however, and with reference again to FIGURE 1, the transmission cable 10 is „ Λ attached to and in parallel with the outer wall 14 of conduit 12.
This assembly is then installed underground, and cable 10 provides the initial communication link at the time of installation. The cable 10 will therefore be hereinafter referred to as the original cable, and under present day applications would normally be either a twisted pair or coaxial type cable. The conduit 12, being completely empty, thus serves as a raceway for the future insertion of a cable 20. Cable 20 will therefore be - hereinafter referred to as the subsequently installed cable, and in this example would be an optical fiber cable.
To facilitate the future installation of the subsequently installed cable, a string or pull member 18 (FIGURES 2-4) is also preinstalled in the conduit 12, paralleling the length of the conduit, for use in pulling or drawing in the cable 20 through the empty conduit. In addition, it is desirable that the inner wall 16 of the conduit be prelubricated or formed of prelubricated material to facilitate this cable pull-through.
In accordance with a principal feature of the present invention, the original cable 10 is detachably connected to the conduit wall 14 so that the cable, when necessary, may be separated or stripped from the conduit 12 at its splicing ends 10a, as illustrated in FIGURE 5. Accordingly, three different methods or embodiments for effecting this detachable connection are respectively depicted in FIGURES 2, 3 and 4, and are now described.
Referring to FIGURE 2, the conductor cable 10 is removably attached, and held in parallel proximity, to the conduit 12 by a frangible polymer jacket 24 formed along the length of the cable-conduit assembly (as illustrated in FIGURE 1). This jacket, preferably of a thickness not greater than .030 inches, may be coextruded at the same time as the extrusion of conduit 12, with the original cable 10 being positioned between the outer wall 14 and jacket 24 during the co-extrusion process.
Alternatively, and with reference to FIGURE 3, a thin frangible web 26 may be formed intermediate, and along the length of, the cable'10 and conduit surface 14, the web 26 retaining the original cable 10 to conduit 12 until it is broken to free the ends 10a from the conduit outer wall.
In the embodiment illustrated in FIGURE 4, a pair of resilient grasping extensions 28 with retention fingers 28a may be integrally formed as part of, and at the time of the extrusion of, the conduit 12, these extensions retaining the cable 10 in parallel and proximate to the conduit wall 14. In this example, the original cable 10 will be removably connected with the conduit after the completion of the extrusion process.
The detachable connection of original cable 10 with conduit 12 enables the release of the cable, as shown in FIGURE 5, in order to alter the direction of the flow of the cable and conduit at the splicing ends, for example. In the example shown in FIGURES 1-3, the detachment will be effected by selectively fracturing the jacket 24 or web 26; in the example shown in FIGURE 4, the cable 10 is selectively pulled free from the resilient grasp of grasping assembly 28.
While preferred embodiments of the present invention have been shown and described herein, further modifications and improvements may be made by those skilled in the art without departing from the spirit and scope of the invention, as solely defined by the appended claims.
Claims (7)
1. A cable conduit having outer and inner walls for receiving a length of a subsequently installed cable to be drawn through said conduit, the improvement comprising: an original cable paralleling and connected with said outer wall and of said conduit; attachment means detachably connecting said original cable to said outer wall of said conduit.
2. The improvement in accordance with Claim 1, wherein said attachment means is a frangible jacket.
3. The improvement in accordance with Claim 1, wherein said attachment means is a frangible web.
4. The conduit in accordance with Claim 1, wherein said attachment means is a resilient grasping extension assembly.
5. The improvement in accordance with Claim 1 wherein said original cable and said subsequently installed cable are different types of communication cables.
6. . The improvement in accordance with Claim 5 wherein said subsequently installed cable is an optical fiber cable.
7. A cable conduit according to any preceding . claim substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74572791A | 1991-08-16 | 1991-08-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE922590A1 true IE922590A1 (en) | 1993-02-24 |
| IE79449B1 IE79449B1 (en) | 1998-05-06 |
Family
ID=24997984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE922590A IE79449B1 (en) | 1991-08-16 | 1992-08-14 | Empty conduit with detachable cable assembly and method of making same |
Country Status (14)
| Country | Link |
|---|---|
| AU (1) | AU664376B2 (en) |
| BE (1) | BE1005584A5 (en) |
| CA (1) | CA2076070A1 (en) |
| CH (1) | CH688214A5 (en) |
| DE (1) | DE4227464A1 (en) |
| ES (1) | ES2040661B1 (en) |
| FI (1) | FI923659A (en) |
| FR (1) | FR2684247B1 (en) |
| GB (1) | GB2258711B (en) |
| IE (1) | IE79449B1 (en) |
| IT (1) | IT1263227B (en) |
| NL (1) | NL193878C (en) |
| NO (1) | NO304810B1 (en) |
| SE (1) | SE504841C2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5678609A (en) * | 1995-03-06 | 1997-10-21 | Arnco Corporation | Aerial duct with ribbed liner |
| DE29507689U1 (en) * | 1995-05-10 | 1995-07-20 | Festo Kg | Multiple hose for electro-pneumatic applications |
| GB2322180B (en) * | 1997-02-15 | 2001-06-20 | Smiths Industries Plc | Hose assemblies |
| GB9703196D0 (en) * | 1997-02-15 | 1997-04-02 | Smiths Industries Plc | Hose asemblies |
| AU756204B2 (en) * | 1998-07-28 | 2003-01-09 | Safetyliner Systems, Llc | Enhancement of profiled tubular lining systems by channel augmentation |
| FR2786912B1 (en) * | 1998-12-04 | 2001-02-16 | Labinal | ELECTRICAL CONNECTION CABLE |
| FR2819950B1 (en) * | 2001-01-23 | 2003-07-04 | Infra Sa | ELECTRIC CABLE |
| CA2641048C (en) | 2006-02-02 | 2014-09-09 | Elmer H. Hara | Pipeline leakage-sensing device |
| DE102006038351A1 (en) * | 2006-07-18 | 2008-01-24 | Leoni Kabel Holding Gmbh & Co. Kg | Supply cable and method of making the supply cable |
| DE102010040334A1 (en) * | 2010-09-07 | 2012-03-08 | Fränkische Rohrwerke Gebr. Kirchner Gmbh & Co. Kg | Electric installation pipe with at least one data line |
| NO332390B1 (en) * | 2010-12-14 | 2012-09-10 | Aker Subsea As | The umbilical clamp |
| US10967408B2 (en) * | 2014-09-19 | 2021-04-06 | Wesco Distribution, Inc. | Pressurized conduit rodder |
| CN104405958A (en) * | 2014-11-26 | 2015-03-11 | 湖北凯科塑业有限公司 | PVC-U corrugated pipe material |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1266991A (en) * | 1960-09-08 | 1961-07-17 | Hartley Electromotives Ltd | Improvements made to conduits intended to receive wires or cables of electrical installations |
| DE6600017U (en) * | 1967-09-22 | 1969-01-02 | Klempau F | |
| BE712170A (en) * | 1968-03-14 | 1968-09-16 | ||
| US3580983A (en) * | 1969-12-03 | 1971-05-25 | Nat Catheter Corp | Conductive line tube |
| US4064355A (en) * | 1976-11-08 | 1977-12-20 | Dayco Corporation | Polymeric flexible hose construction and method of making same |
| US4262703A (en) * | 1978-08-08 | 1981-04-21 | Custom Cable Company | Impact resistant control line |
| GB2123978B (en) * | 1982-07-12 | 1985-09-11 | Telephone Cables Ltd | Optical fibre cable |
| DE8408571U1 (en) * | 1984-03-21 | 1984-06-28 | Festo KG, 7300 Esslingen | PNEUMATIC HOSE |
| EP0160498A3 (en) * | 1984-04-23 | 1987-01-14 | Marcello Valenzano | Conduit cable support |
| GB8515818D0 (en) * | 1985-06-21 | 1985-07-24 | Webco Ltd | Pipeline |
-
1992
- 1992-08-13 CA CA002076070A patent/CA2076070A1/en not_active Abandoned
- 1992-08-13 FR FR9210007A patent/FR2684247B1/en not_active Expired - Fee Related
- 1992-08-14 GB GB9217343A patent/GB2258711B/en not_active Expired - Fee Related
- 1992-08-14 IE IE922590A patent/IE79449B1/en not_active IP Right Cessation
- 1992-08-14 CH CH02537/92A patent/CH688214A5/en not_active IP Right Cessation
- 1992-08-14 SE SE9202352A patent/SE504841C2/en not_active IP Right Cessation
- 1992-08-14 FI FI923659A patent/FI923659A/en unknown
- 1992-08-14 NO NO922473A patent/NO304810B1/en not_active IP Right Cessation
- 1992-08-14 ES ES09201721A patent/ES2040661B1/en not_active Expired - Lifetime
- 1992-08-16 BE BE9200722A patent/BE1005584A5/en not_active IP Right Cessation
- 1992-08-17 NL NL9201468A patent/NL193878C/en not_active IP Right Cessation
- 1992-08-17 IT ITRM920607A patent/IT1263227B/en active IP Right Grant
- 1992-08-17 DE DE4227464A patent/DE4227464A1/en not_active Withdrawn
- 1992-08-17 AU AU21063/92A patent/AU664376B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| NO304810B1 (en) | 1999-02-15 |
| AU2106392A (en) | 1993-02-18 |
| SE9202352L (en) | 1993-02-17 |
| ES2040661R (en) | 1994-06-16 |
| NL193878B (en) | 2000-09-01 |
| NL9201468A (en) | 1993-03-16 |
| DE4227464A1 (en) | 1993-02-25 |
| ES2040661A2 (en) | 1993-10-16 |
| FR2684247B1 (en) | 1997-05-09 |
| NO923203D0 (en) | 1992-08-14 |
| ES2040661B1 (en) | 1995-01-01 |
| FI923659A0 (en) | 1992-08-14 |
| GB2258711A (en) | 1993-02-17 |
| NO923203L (en) | 1993-02-17 |
| ITRM920607A1 (en) | 1994-02-17 |
| FR2684247A1 (en) | 1993-05-28 |
| BE1005584A5 (en) | 1993-11-09 |
| GB9217343D0 (en) | 1992-09-30 |
| IT1263227B (en) | 1996-08-05 |
| FI923659A (en) | 1993-02-17 |
| AU664376B2 (en) | 1995-11-16 |
| IE79449B1 (en) | 1998-05-06 |
| GB2258711B (en) | 1995-06-14 |
| CH688214A5 (en) | 1997-06-13 |
| ITRM920607A0 (en) | 1992-08-17 |
| CA2076070A1 (en) | 1993-02-17 |
| SE9202352D0 (en) | 1992-08-14 |
| SE504841C2 (en) | 1997-05-12 |
| NL193878C (en) | 2001-01-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed |