CA2076070A1 - Empty conduit with detachable cable assembly and method of making same - Google Patents
Empty conduit with detachable cable assembly and method of making sameInfo
- Publication number
- CA2076070A1 CA2076070A1 CA002076070A CA2076070A CA2076070A1 CA 2076070 A1 CA2076070 A1 CA 2076070A1 CA 002076070 A CA002076070 A CA 002076070A CA 2076070 A CA2076070 A CA 2076070A CA 2076070 A1 CA2076070 A1 CA 2076070A1
- Authority
- CA
- Canada
- Prior art keywords
- cable
- conduit
- accordance
- improvement
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000004891 communication Methods 0.000 claims abstract description 22
- 239000013307 optical fiber Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 abstract description 8
- 150000002500 ions Chemical class 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000001125 extrusion 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
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 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
- 230000003287 optical effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 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)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Details Of Indoor Wiring (AREA)
- Joints Allowing Movement (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
"EMPTY CONDUIT WITH DETACHABLE CABLE
ASSEMBLY AND METHOD OF MAKING SAME"
Abstract An empty conduit with a communication cable of one type detachably connected to the outer wall of the conduit enables the future installation of one or more communication cables, particularly of a different type, within the conduit. Illustrated detachable connections include frangible surrounding jacket, frangible web and a resilient grasping extension assembly.
ASSEMBLY AND METHOD OF MAKING SAME"
Abstract An empty conduit with a communication cable of one type detachably connected to the outer wall of the conduit enables the future installation of one or more communication cables, particularly of a different type, within the conduit. Illustrated detachable connections include frangible surrounding jacket, frangible web and a resilient grasping extension assembly.
Description
~7~
Field of the Invention This invention relates generall~ to communication cable ~y~tem~, more particularly ~o cable conduit and cable a~emblies, and even more particularly to cable conduit and cable assen~lies with means for expanding cable capability.
Backqround 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 800n overloadad, 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 transmi6sion~ are over twisted ,pa~r telep}lone and coaxlal cables, optlcal fi~er cable~ are clearly becoming the future transmission media for the com~lunications industry. ~s a consequence, it become~ imperativ0 that existing non-optical fiber cable assembly ~nstallations incorporate assemblies which provide not only for additional future cable installations, but also the capability of installing optical 1ber tranBmi~Sion cable~ in the futur~ with~ut the need ~?7~ 0 of unearthing or replacing the initial in~talla-tion~. .
Description of the Prior ~rt There are existing prior art 6ys-tems which have attempted-to provide this expanded cable capability. For example, U.5. Paten-t No. 3,862,349 di6clo~es an underground telephone cable as~embl~ in~tallation in which the -telephone cable i8 di~po~ed inside a flexible outer housing having an out~ide diame-ter suffi~iently larger than the contained tel~phone cable B0 aB to provide fo~ Euture placemen-t of at least one additional cable, a pull wire also being installed along side of the exi~ting cable ~or this futu~e placement. U.S. Patent No. 3,383,456 di~clo~es a flexible conduit with the electrical conductors belng provided within or adjacent the conduit wall so that additional conductors when needed may be drawn through the corlduit at a later time without having to remove the conduit.
While these prior art sy3tem~ in a broad sen~e enable expanded cable capability, they are not completely ~ati~factory and have a number of disadvantages a~sociated therewith. For example, in addition to the fact that the existing cable or conductors are located inside the conduit and would thu~ interfere with the future placement of additional ca~les therein, as well as increasing the pulling resistance of the future cable installation, the overall construction and des~gn of the prior art sy~tems are deficient in many material respects.
Ob~ect~ of the Invention It i~ therefore the principal ob~ect of thi~ invention to provide a new and improved conduit/communication cable a~embly which provides for expanded cable c~pability for ~he future.
It is a Eurther ob~ect of the pre~ent ihvention to provide a new and improved conduit/communication cable a~e~bly which enables subsequent additions or upgrades to the existing cable in~tallation at a minimum of installation C08t and a minimum of inconvenience to the cu~tomer.
- ~ ' .. . . ...
i! 2~7~i~70 It is a still further object of t}liB invention to provide an empty cable conduit and associated communication cable assembly with new and improved means and methods for as~ociating 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 ou-ter surface of a flexible, elongated empty cable condui-t, wi-th means provided for the fu-ture in~tallation of one or more communication cables within the empty conduit long after the condui-t/cable assembly has been installed underground.
In accordance wi-th one particular feature of ths invention, the detachably connected cable is of ona type, for example a twisted pair telephone cable, while the subsequently installed cable i8 of a different type, for example an optical fiber cable.
Specific and additional features of the invention, a~
well as additional objects and advan-tages thereof, will become readily understood by those skilled in the art from the following detailed description, taken in conjunc~ion wi~h the accompanying drawings.
Brief Description of the Drawinqs .
Fiyure 1 is a partial perspec~ive view of a section of the conduit and original communication cable combination in accordanc~ with the teachlngs of the pxe~ent 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 origin~l communication cable illustrating one method of attachment of the original communication cable to ~he condult;
F~gure 3 i~ a cro~ ~ectional view o th~ condu~t and li 2~
origlnal communication cable illus-tr~-ting a 3econd me~hod 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, illustra-tin~ the ends of the cable having been de-tached or stripped from the conduit surface.
, ~he drawings are not neces~arily to scale, and cartain portions may have been exaggerated to emphasize certain details of the invention.
Description of the Preferred Embodimen-t In the description which follows, like parts are indica-ted throughout -the fipecification (and drawings~ with -the 6ame re~pective reference numeral~.
Referring ini-tially-to FIGVRE l of the drawings, a cable conduit 12 having an ou-ter wall 14 and an lnner wall 16 i~
depicted. The cable conduit 12 is of the typ0 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 a~ a protective underground housing for a communication tran6mission cable. One such form of conduit i8 currently being sold by Integral Corporation of Dallas, Texas, the as6ignee of this inventionr under the CABLECON tLademark.
In ac~ordance wi~h conventional approache~, the cable conduit is buried underground with the particular transmis~ion cable normally either already having been pre-lnserted within the conduit or inserted within the conduit after the conduit i~
buried.
In accordance with the present inven~ion, however, and with reference again -~o FIGU~E 1, the tran~mi8~ion cable 10 i~
~2~7~ 7~ ~
attached -to and in parallel with the outer wall 14 of conduit 12. .
Thi6 a8semh]y i6 then installed underground, and cable 10 provide~
the initial communication link at the time of installation. The cable 10 will therefore be hereinaf-ter referred -to a~ the "original cable", and under present day applications woul~
normally be ei-ther a twisted pair or coaxial type cable. The conduit 12, b~ing completely empty, thus serves as a raceway for the future insertion of a cable 20. Cable 20 will therefore be hereinafte~ referred to as the "subse~uently installed cable", and in this example would be an optical fiber cable.
To facilitate the future installa-tion of thP
subsequently installed cable, a 6tring or pull member lB (FIGURES
Field of the Invention This invention relates generall~ to communication cable ~y~tem~, more particularly ~o cable conduit and cable a~emblies, and even more particularly to cable conduit and cable assen~lies with means for expanding cable capability.
Backqround 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 800n overloadad, 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 transmi6sion~ are over twisted ,pa~r telep}lone and coaxlal cables, optlcal fi~er cable~ are clearly becoming the future transmission media for the com~lunications industry. ~s a consequence, it become~ imperativ0 that existing non-optical fiber cable assembly ~nstallations incorporate assemblies which provide not only for additional future cable installations, but also the capability of installing optical 1ber tranBmi~Sion cable~ in the futur~ with~ut the need ~?7~ 0 of unearthing or replacing the initial in~talla-tion~. .
Description of the Prior ~rt There are existing prior art 6ys-tems which have attempted-to provide this expanded cable capability. For example, U.5. Paten-t No. 3,862,349 di6clo~es an underground telephone cable as~embl~ in~tallation in which the -telephone cable i8 di~po~ed inside a flexible outer housing having an out~ide diame-ter suffi~iently larger than the contained tel~phone cable B0 aB to provide fo~ Euture placemen-t of at least one additional cable, a pull wire also being installed along side of the exi~ting cable ~or this futu~e placement. U.S. Patent No. 3,383,456 di~clo~es a flexible conduit with the electrical conductors belng provided within or adjacent the conduit wall so that additional conductors when needed may be drawn through the corlduit at a later time without having to remove the conduit.
While these prior art sy3tem~ in a broad sen~e enable expanded cable capability, they are not completely ~ati~factory and have a number of disadvantages a~sociated therewith. For example, in addition to the fact that the existing cable or conductors are located inside the conduit and would thu~ interfere with the future placement of additional ca~les therein, as well as increasing the pulling resistance of the future cable installation, the overall construction and des~gn of the prior art sy~tems are deficient in many material respects.
Ob~ect~ of the Invention It i~ therefore the principal ob~ect of thi~ invention to provide a new and improved conduit/communication cable a~embly which provides for expanded cable c~pability for ~he future.
It is a Eurther ob~ect of the pre~ent ihvention to provide a new and improved conduit/communication cable a~e~bly which enables subsequent additions or upgrades to the existing cable in~tallation at a minimum of installation C08t and a minimum of inconvenience to the cu~tomer.
- ~ ' .. . . ...
i! 2~7~i~70 It is a still further object of t}liB invention to provide an empty cable conduit and associated communication cable assembly with new and improved means and methods for as~ociating 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 ou-ter surface of a flexible, elongated empty cable condui-t, wi-th means provided for the fu-ture in~tallation of one or more communication cables within the empty conduit long after the condui-t/cable assembly has been installed underground.
In accordance wi-th one particular feature of ths invention, the detachably connected cable is of ona type, for example a twisted pair telephone cable, while the subsequently installed cable i8 of a different type, for example an optical fiber cable.
Specific and additional features of the invention, a~
well as additional objects and advan-tages thereof, will become readily understood by those skilled in the art from the following detailed description, taken in conjunc~ion wi~h the accompanying drawings.
Brief Description of the Drawinqs .
Fiyure 1 is a partial perspec~ive view of a section of the conduit and original communication cable combination in accordanc~ with the teachlngs of the pxe~ent 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 origin~l communication cable illustrating one method of attachment of the original communication cable to ~he condult;
F~gure 3 i~ a cro~ ~ectional view o th~ condu~t and li 2~
origlnal communication cable illus-tr~-ting a 3econd me~hod 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, illustra-tin~ the ends of the cable having been de-tached or stripped from the conduit surface.
, ~he drawings are not neces~arily to scale, and cartain portions may have been exaggerated to emphasize certain details of the invention.
Description of the Preferred Embodimen-t In the description which follows, like parts are indica-ted throughout -the fipecification (and drawings~ with -the 6ame re~pective reference numeral~.
Referring ini-tially-to FIGVRE l of the drawings, a cable conduit 12 having an ou-ter wall 14 and an lnner wall 16 i~
depicted. The cable conduit 12 is of the typ0 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 a~ a protective underground housing for a communication tran6mission cable. One such form of conduit i8 currently being sold by Integral Corporation of Dallas, Texas, the as6ignee of this inventionr under the CABLECON tLademark.
In ac~ordance wi~h conventional approache~, the cable conduit is buried underground with the particular transmis~ion cable normally either already having been pre-lnserted within the conduit or inserted within the conduit after the conduit i~
buried.
In accordance with the present inven~ion, however, and with reference again -~o FIGU~E 1, the tran~mi8~ion cable 10 i~
~2~7~ 7~ ~
attached -to and in parallel with the outer wall 14 of conduit 12. .
Thi6 a8semh]y i6 then installed underground, and cable 10 provide~
the initial communication link at the time of installation. The cable 10 will therefore be hereinaf-ter referred -to a~ the "original cable", and under present day applications woul~
normally be ei-ther a twisted pair or coaxial type cable. The conduit 12, b~ing completely empty, thus serves as a raceway for the future insertion of a cable 20. Cable 20 will therefore be hereinafte~ referred to as the "subse~uently installed cable", and in this example would be an optical fiber cable.
To facilitate the future installa-tion of thP
subsequently installed cable, a 6tring or pull member lB (FIGURES
2-4~ is also preinstalled in the conduit 12, paralleling the length of the condui-t, for use in pulling or clrawing ln the cable 20 through the empty condui-t. 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 neces8axy, may be ~eparated or stripped ~ om the conduit 12 at it~ ~plicing ends lOa, as illustrate ~ FIGURE 5. Accordingly, ~hree different methods or embodiments for effec-ting this detachable conn~ction are respectively depicted in FIGURES 2, 3 and 4, and are now described.
Referring to FIGU~E 2, the conductor cable 10 ifi removably attached, and held in parallel proxi~ity, to the conduit 12 by a frangible polymer ~acket 24 formed along the length of the ca~le-conduit assembly (a~ illustrated in FIGUR~ 1). This ~acket, preferably of a thickness not greater than .030 inche~, may be co-extruded at the same time as the e~trusion of conduit 12, with the original cable 10 being positioned between the outer wall 14 and ~acket 24 during the co-extru~ion proce~.
29:?7~0 Alternatively, and wi-th 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 Eree the ends lOa from the conduit outer wall.
In the embodiment illustrated in FIGURE 4, a pair of resilient grasping extensions 28 wi-th retention fingers 28a may be integrally formed as part of, and at the time of the extrusion of, the conduit 12, these ex-~ensions retaining the cable 10 in parallel and proximate to the conduit wall 14. In this example, the original cable lO will be removably connected with the conduit after the completion o~ the extrusion process.
The detachable connection o 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 ~hown in FIGURRS 1-3, the detachmen~ will be ef~ec-ted by ~electively fracturing the jacket 24 or web 26; in the example shown in FIGURE
4, the cable 10 i5 selectively pulled free from the resilient grasp of grasping assembly 28.
, While preferred embodimen-t~ o 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.
.::
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 neces8axy, may be ~eparated or stripped ~ om the conduit 12 at it~ ~plicing ends lOa, as illustrate ~ FIGURE 5. Accordingly, ~hree different methods or embodiments for effec-ting this detachable conn~ction are respectively depicted in FIGURES 2, 3 and 4, and are now described.
Referring to FIGU~E 2, the conductor cable 10 ifi removably attached, and held in parallel proxi~ity, to the conduit 12 by a frangible polymer ~acket 24 formed along the length of the ca~le-conduit assembly (a~ illustrated in FIGUR~ 1). This ~acket, preferably of a thickness not greater than .030 inche~, may be co-extruded at the same time as the e~trusion of conduit 12, with the original cable 10 being positioned between the outer wall 14 and ~acket 24 during the co-extru~ion proce~.
29:?7~0 Alternatively, and wi-th 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 Eree the ends lOa from the conduit outer wall.
In the embodiment illustrated in FIGURE 4, a pair of resilient grasping extensions 28 wi-th retention fingers 28a may be integrally formed as part of, and at the time of the extrusion of, the conduit 12, these ex-~ensions retaining the cable 10 in parallel and proximate to the conduit wall 14. In this example, the original cable lO will be removably connected with the conduit after the completion o~ the extrusion process.
The detachable connection o 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 ~hown in FIGURRS 1-3, the detachmen~ will be ef~ec-ted by ~electively fracturing the jacket 24 or web 26; in the example shown in FIGURE
4, the cable 10 i5 selectively pulled free from the resilient grasp of grasping assembly 28.
, While preferred embodimen-t~ o 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 (6)
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.
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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74572791A | 1991-08-16 | 1991-08-16 | |
| US07/745,727 | 1991-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2076070A1 true CA2076070A1 (en) | 1993-02-17 |
Family
ID=24997984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002076070A Abandoned CA2076070A1 (en) | 1991-08-16 | 1992-08-13 | 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007087720A1 (en) * | 2006-02-02 | 2007-08-09 | University Of Regina | Pipeline leakage-sensing device |
Families Citing this family (12)
| 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, 73734 Esslingen | Multiple hose for electro-pneumatic applications |
| GB9703196D0 (en) * | 1997-02-15 | 1997-04-02 | Smiths Industries Plc | Hose asemblies |
| GB2322180B (en) * | 1997-02-15 | 2001-06-20 | Smiths Industries Plc | Hose assemblies |
| WO2000006933A2 (en) * | 1998-07-28 | 2000-02-10 | 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 |
| 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 |
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| 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 FR FR9210007A patent/FR2684247B1/en not_active Expired - Fee Related
- 1992-08-13 CA CA002076070A patent/CA2076070A1/en not_active Abandoned
- 1992-08-14 IE IE922590A patent/IE79449B1/en not_active IP Right Cessation
- 1992-08-14 ES ES09201721A patent/ES2040661B1/en not_active Expired - Lifetime
- 1992-08-14 CH CH02537/92A patent/CH688214A5/en not_active IP Right Cessation
- 1992-08-14 FI FI923659A patent/FI923659A/en unknown
- 1992-08-14 SE SE9202352A patent/SE504841C2/en not_active IP Right Cessation
- 1992-08-14 GB GB9217343A patent/GB2258711B/en not_active Expired - Fee Related
- 1992-08-14 NO NO922473A patent/NO304810B1/en not_active IP Right Cessation
- 1992-08-16 BE BE9200722A patent/BE1005584A5/en not_active IP Right Cessation
- 1992-08-17 DE DE4227464A patent/DE4227464A1/en not_active Withdrawn
- 1992-08-17 AU AU21063/92A patent/AU664376B2/en not_active Ceased
- 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
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007087720A1 (en) * | 2006-02-02 | 2007-08-09 | University Of Regina | Pipeline leakage-sensing device |
| US8640527B2 (en) | 2006-02-02 | 2014-02-04 | Elmer H. Hara | Pipeline leakage-sensing device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4227464A1 (en) | 1993-02-25 |
| SE504841C2 (en) | 1997-05-12 |
| ITRM920607A1 (en) | 1994-02-17 |
| ITRM920607A0 (en) | 1992-08-17 |
| AU2106392A (en) | 1993-02-18 |
| GB2258711B (en) | 1995-06-14 |
| AU664376B2 (en) | 1995-11-16 |
| FR2684247B1 (en) | 1997-05-09 |
| NO923203D0 (en) | 1992-08-14 |
| IE79449B1 (en) | 1998-05-06 |
| ES2040661B1 (en) | 1995-01-01 |
| NO304810B1 (en) | 1999-02-15 |
| GB2258711A (en) | 1993-02-17 |
| ES2040661R (en) | 1994-06-16 |
| IT1263227B (en) | 1996-08-05 |
| SE9202352D0 (en) | 1992-08-14 |
| FI923659A0 (en) | 1992-08-14 |
| NL9201468A (en) | 1993-03-16 |
| NO923203L (en) | 1993-02-17 |
| FR2684247A1 (en) | 1993-05-28 |
| ES2040661A2 (en) | 1993-10-16 |
| SE9202352L (en) | 1993-02-17 |
| GB9217343D0 (en) | 1992-09-30 |
| NL193878C (en) | 2001-01-03 |
| FI923659A (en) | 1993-02-17 |
| CH688214A5 (en) | 1997-06-13 |
| BE1005584A5 (en) | 1993-11-09 |
| IE922590A1 (en) | 1993-02-24 |
| NL193878B (en) | 2000-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |