MXPA00003582A - Electrical conduit and conduit system - Google Patents

Abstract

An electrical conduit piece of the invention has threaded regions, particularly external, left hand, tapered or straight threaded regions at each end. This conduit piece is particularly well adapted to be used in conventional conduit systems by coupling to conventional conduit pieces through a coupling of the invention having two internal threaded regions, one threaded region having left hand threads and the other threaded region having right hand threads. A groove may be formed in the internal wall of the coupling, e.g., at or near its longitudinal center to provide an open region in which ends of conduit pieces inserted into the coupling can abut. In a preferred embodiment, the conduit piece is embodied as a curved or elbow conduit.

Description

SYSTEM OF DUCTS AND ELECTRICAL CONDUITS BACKGROUND OF THE INVENTION Field of the Invention This invention relates generally to conduit and / or pipe systems and more particularly to an electrical conduit system for enclosing and protecting flexible cables or wires such as communication, optical or electrical cables.

Previous Art In architectural and construction applications, electrical conduit systems are used to enclose and protect flexible lines or cables such as power lines, telephone lines, fiber optic cables, computer network cables, etc. , to prevent damage to these lines. These electrical conduit systems are used in buildings, for example, inside the walls of buildings, underground and for external applications exposed on the ground. Conventional electrical conductor systems consist of sections of individual conduits or pieces usually made of rigid material such as stainless or galvanized steel, PVC or aluminum, coupled together to form the conduit system generally referred to as a "conduit path". Examples of standard electrical conduit parts include straight conduit systems, for example sections of 3,048 meters of conduit of various diameters with male or external threads at each end, also called "nipples", for example, sections of straight conduits shorter than several diameters with male or external threads at each end and elbows, for example, curved or bent duct sections as well as male or external threads at each end. By standard convention, the threads on the ends of the conventional conduit parts are all threads on the right. The adjacent conductive parts are connected together by a female copy having continuous internal right threads. To construct a conventional electrical conduit system, a first piece of conduit, eg, a nipple, is secured to one end of the conduit path, usually at the feed end. A female copy is screwed into the outer end of the first part of the conduit until it is fixed. Then, a second part of the conduit, for example a 3048-meter straight section or an elbow, is inserted into the other end of the female copy and rotated to screw it into the female copy to connect the second part of the conductor to the first part of the female. driver. The additional conductor pieces, connected by additional female copies, are successively added to form the electric conductor system. Sections or pieces can be added to walls or suspended from a ceiling by various known methods. While they are generally acceptable for protecting cables, there are some limitations associated with conventional electrical conductor parts and electrical conductor systems. For example, in conventional systems each piece of the duct must be successively coupled to the part of the previous duct. Once the conduit is formed, it is difficult to re-enter or access an intermediate section of the conduit system. Said re-entry typically results in a complete disassembly of the conduit system from one end to a desired access point. This disassembly can be expensive and labor-intensive. Alternatively, to complete the conduit routes, access is achieved in intermediate sections by means of destructive means, generally involving the cutting of tubes and the cutting or pulling of the wires. However, this creates a problem, particularly in closed areas such as interior walls, where the destroyed section of the duct can not generally be replaced with the same type of duct parts, since there is not enough space to screw the pieces of duct. duct jointly, for example, there is insufficient space to rotate the parts of the new duct, particularly in curved duct parts in the coupling. Therefore, complex clamping devices can be used. However, these known fastening devices are generally expensive and difficult to install. Additionally, to connect conventional conductor parts together, the conduit parts must be rotated or rotated to thread the end to the end of a conduit part into the adjacent female copy. Since conventional conduit parts can weigh in the order of several hundred kilos, several workers may be required to align and rotate the larger conduit parts. This rotation is particularly difficult with large elbow pieces which, in addition to the problem of their weight, also require sufficient clearance space, especially from the wall installations, for the curved outer section of the elbow to rotate while being screwed at one end of the elbow. Elbow inside a conventional female copy. The turning of said large conduit parts increases the labor requirement to form a conventional electrical conduit system and therefore, increases the cost of construction. In addition, since conventional conduit parts must be rotated during the construction of the electrical conduit system, the cable or cables that will be protected can not be pre-positioned within the un-assembled conduit parts. Conversely, after the entire conduit system has been constructed, the cable is typically pulled through the entire conduit system from one end to the other. Pulling them can damage the cable and is particularly disadvantageous for fiber optic cables. For example, many conventional fiber optic cable systems have four or more separate fiber optic cables passing through the conduit system. These Abra optical cables are held in place by spacers in the conduit parts. Because conventional conduit parts must be rotated to form the conduit system, the fiber optic cables can not be inserted into conduit parts until the entire conduit system has been constructed to prevent twisting or damage to the cables . However, pulling the fiber optic cables through the entire system presents an opportunity for the fiber optic cables to break, become damaged or become misaligned.

Therefore, it would be helpful to provide a system of conduits and / or pieces of electrical conduits that reduce or eliminate at least some of the limitations associated with conventional electrical conduit systems.

SUMMARY OF THE INVENTION A system of conduits of the invention comprises a plurality of conduit parts, at least one part of the conduit parts comprises a first part having a first end with a first threaded region and a second end with a second end. Threaded region. A coupling of the invention is configured to engage at least one of the ends of the first piece of conduit and one of the ends of an adjacent piece of conduit. The coupling comprises a first threaded portion and a second threaded portion with a grooved region located therein between and with the first threaded portion of the copy being in a different thread direction than the second threaded portion. Another conduit system of the invention comprises a plurality of first conduit members, each having a first end with a first threaded region and a second end with a second threaded region. The first and second threaded regions have substantially the same first thread direction. At least one second piece of conduit is provided having a first end with a first threaded region and a second end with a second threaded region with the first and second threaded regions of the second conduit part each having substantially the same second threaded direction and with the second threaded direction being different from the first threaded direction. At least one coupling is provided and comprises a first threaded portion and a second threaded portion with the first threaded portion having a different thread direction than the second threaded portion with the first threaded portion of the coupling configured to reversibly engage the first threaded region in the first piece of conduit and with the second threaded portion of the copie configured to reversibly couple the second threaded region in the second part of the conduit to reversibly couple the first part of the conduit with the second conduit part. An additional conduit system is provided comprising a plurality of first conduit members having a first end and a second end with the first threaded regions externally located at each end and with each first threaded region comprising threads on the right. A plurality of second parts are provided, each having a first end and a second end with the second threaded regions externally located at each end, each second threaded region comprising threads on the left. A coupling is located between the first and second adjacent conduit parts and is configured to reversibly couple one end of the first conduit part with one end of the second adjacent conduit part, the coupling comprises a first, internally threaded, threaded portion to the right configured to engage one end of a first piece of conduit and a second internally threaded, the left-hand thread portion configured to engage one end of a second piece of conduit. The copy has an internal grooved region positioned such that when the coupled ends of the first and second part of the duct are inserted into the copy, the inserted ends of the duct pieces terminate in the internal grooved region. A method of forming a duct system of the invention comprises the steps of providing a plurality of first duct parts, each first duct part having a first end with a first threaded region and a second end with a second threaded region with the first and second threaded regions having the same first threaded direction, providing at least a second piece of conduit having a first end with a first threaded region and a second end with a second threaded region with the first and second threaded regions of the second conduit part being in the same second direction and with the second thread direction being different from the first thread direction providing a copy having a first threaded portion and a second threaded portion with the thread direction of the first and second threaded portions being different from one another, engaging the first threaded portion of copying with a first threaded region at a first end of a first copy part, coupling the second threaded portion of the copy with a second threaded region at a second end of the second copy part and rotating the copy in a first direction to thread the first end of the first part of the copy and the second end of the second part of the copy within the copy until the coupled ends of the conduit pieces end.

A retrofit method is provided to a conduit system having a plurality of first conduit members with opposite ends and threaded regions of the same threaded direction located at each end. The first parts of the conduit are first coupled by means of copings having opposite ends with threaded portions of the same thread direction as the threaded regions of the first conduit parts. The method comprises the steps for the removal of at least one first piece of duct and in at least one of the first copies, replacing the first piece of duct removed with a second piece of duct having a first end and a second end, the first end has a first threaded region of the same direction as the first piece of conduit and the second end having a second threaded region of different thread direction than the first threaded region replacing the first copy removed with a second copy, the second copy comprises a first threaded portion having the same threaded direction as the first threaded region of the second conduit part and a second threaded portion of the same threaded direction as the second threaded region of the second conduit part, engaging the second threaded portion of the copy with the second end of the second piece of conduit, engaging the first portion ros each with one end of a first piece of adjacent conduit and rotating the second copy to couple the second end of the second piece of conduit with the adjacent end of a first piece of conduit until the coupled ends of the first and second conduit pieces finish substantially.

A piece of electrical conduit of the invention has threaded regions, particularly external, left, conical or straight threaded regions at each end. This piece of conduit is particularly well suited for use in conventional conduit systems by coupling to conventional conduit parts through a copy of the invention having two internal threaded regions, one threaded region having left-hand threads and the other region threaded that has threads to right. A groove can be formed in the inner wall of the copy, for example, in the vicinity of its longitudinal center to provide an open grooved region in which the ends of the conduit parts inserted within the coupling can terminate. In a preferred embodiment, the conduit piece is incorporated as an elbow or curved conduit. A further embodiment of the invention comprises a conduit part having external threads on the right at one end and external threads on the left at the same end. The conduit and coupling parts of the invention can be used in a new construction of electrical conduit systems or in the retrofit of an existing conduit system. A better understanding of the invention will be obtained from the following description in relation to the accompanying drawings, wherein the reference characters are identified with the parts thereof.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a plan view of a piece of conduit (not to scale) of the invention.

Figure 2 is a longitudinal sectional view (not to scale) of a copy of the invention. Figure 3 is a plan view of the conduit piece (not to scale) of Figure 1 connected by the copy of Figure 2 to a conventional conduit section. Figure 4 is a schematic view of an electrical conduit system (not to scale) using a piece of conduits and copies of the invention. Figure 5 is a plan view of an alternative conduit part (not to scale) of the invention and Figure 6 is a side sectional view of the upper part of a copy of the invention (not to scale) showing an exemplary of thread profile. Rt = radius D = depth to the main diameter L = threads to the left R = threads to the right DESCRIPTION OF THE PREFERRED MODALITIES For purposes of the description of the present invention, the terms "upper", "lower", "right", "left" and similar terms are mentioned in the accompanying drawings. However, it is understood that the invention may assume several alternatives of orientation and sequence of steps unless expressly stated otherwise. It is also understood that the specific dimensions illustrated in the accompanying drawings and described in the following specification are merely examples of the embodiments of the invention and are not considered as limiting. A piece of conduit 10 of the invention is generally designated in Figures 1, 3 and 4. As shown in Figure 1 the conduit piece 10 is formed of a substantially cylindrical hollow body 12, made of rigid material, such as PVC or metals such as stainless steel, galvanized carbon steel or aluminum, or similar materials. The piece of conduit 10 has a first end 14 and a second end 16. A first threaded region 18 is formed on the outer surface of the conduit piece 10 at or near the first end 14 and a second externally threaded region 20 is formed in or near the second end 16 of the conduit piece 10. In the preferred embodiment of the present invention, the threaded regions 18 and 20 are both comprised of threads having the same thread direction, for example, left, conical or threads straight. While the piece of conduit 10 in Figure 1 is shown as a bend or an elbow conduit, it is understood that the conduit piece 10 is not limited to an elbow conduit but may be of any conventional electrical conduit configuration, for example, a section of straight conduit. The conduit piece 10 is preferable and substantially of the same directions as the standard conventional conduit pieces known in the art. A hollow copy 24 of the invention is generally designed as shown in Figures 2-4. The copy 24 is preferable and substantially cylindrical and can be made from the same materials as the piece of conduit 10. the copy 24 has a first end 26 and a second end 28. An internal recess 30, for example, a region of a diameter larger than the central region of the copy 24, is formed at or near each end 26 and 28 of the copy 24. The copy 24 further includes a first internally threaded portion or region 32 and a second internally threaded portion or region 34. As shown in Figure 2, a first conical region 36 is located between the left recess 30 and the first threaded region 32 and a second conical region 38 is located between the right recess 30 and the second threaded region 34. The threaded regions 32 and 34 are preferably comprised of right-hand threads or conical threads with opposite thread directions, for example, the first threaded region 32 may be comprised of threads on the right and the second region 34 on the right. threaded can be comprised of threads on the left. The threaded regions 32 and 34 are preferably of the same substantial length, whose preferably substantial length corresponds to the length of the threaded regions 18 and 20 in the conduit piece 10. Preferably each threaded region 32 and 34 is configured to provide nine screw threads. complete coupling so that the system of the invention meets the requirements of UL6 and qualifies as a class of a conduit installation. An inner circumferential groove 40 is formed in the inner wall of the copy 24 and is preferably located approximately at or near the longitudinal center of the copy 24. The slot 40 provides an open grooved region in which the ends of the conduit pieces inserted into the copy 24 may end. For example, Figure 2 shows the two pieces of duct A and B (in phantom) coupled with copy 24. The inner end C of duct part A ends or terminates substantially at the inner end D of duct part B in the open area created by slot 40. This promotes a good foundation for the system. "Substantially ends", means that the inner ends of the conduit pieces are smaller than 2.54 cm, preferably smaller than 1.27 cm and more preferably are in contact with each other. The use of the conduit piece 10 and the copy 24 of the invention are described in Figure 3 which shows how the conduit piece 10 can be coupled by means of copies 24 to conventional conduit parts or to the sections 42, for example, the sections of straight conduits having opposite ends with threaded regions at each end of each threaded region being at the same thread direction, for example, conventional right-hand threads. Observing the lower copy 24 in Figure 3, for example, the first end 26 of the copy 24 slides towards the outer end (first end) of the lower conduit section 42 until the threads on the right in the conduit section 42 contact, terminate or initially engage the threads to the right in the first right region 32 of the copy 24. One end, for example the second end 16 of the piece of conduit 10 is then inserted into the second end 28 of the copy 24 until the threads to the left at the second end 16 of the conduit piece 10 contact, terminate or initially engage the threads to the left in the second threaded region 34 of the copie 24. Then, the copie 24 is rotated or rotated simultaneously to thread the second end 10 of the conduit piece 10 and the first end of the conduit section 42 within the copying 24 until the inserted ends of the contact piece 10 and conduit section 42 similarly terminate as duct parts A and B in Figure 2. During this procedure only copy 24, not duct part 10 or duct section 42, rotates to reversibly couple duct part 10 and duct section 42. In this description, the terms "reversibly couple" or "reversibly join" mean that the coupled conduit pieces can be decoupled by rotating the copy 24 in a direction opposite to that used to couple the pieces together. The recesses 30 allow a small amount of float or play in case the respective ends of the conduit piece 10 and the conduit piece 42 are engaged and do not start exactly in the same threaded position at the opposite ends 26 and 28 of the copy 24. The first end 14 of the piece of conduit 10 can be similarly connected to another outer end of the upper conventional conduit section 42 by another copy 24 of the invention, with the second coupling region 34 (threads to the left) of the upper copy 24 coupling the threads to the left at the first end 14 of the contact piece 10 and the first coupling region 32 (threads to the right) of the upper copy 24 coupling the threads to the right at the outer end (first or second) of the upper conventional conduit section 42. In this way, the elbow coupling part dimensioned by itself should not be rotated to be connected within a conduit system s electrical using the standard sections of right threaded ducts to the right 42. This is particularly advantageous with the larger dimension elbow duct pieces 10, which, in previously known systems, would have to be physically rotated and supported, usually by a crew of workers. Additionally, previously known elbow sections can be placed only in areas with sufficient clearance to allow the elbow to be rotated. In the present invention, only the necessary couplings can be rotated, not the elbow itself. This greatly reduces the labor requirement required for large couplings, particularly elbow conduit parts or sections which lower the cost of building a conduit system. A system of electrical conduits using conduit parts 10 and copies 24 of the invention is designated with the reference number 50 in Figure 4. The conduit system 50 extends from a junction box or a contact box 52 to an outlet or contact 54. In the conduit system 50 shown in Figure 4, conventional conduit sections 42 having external threaded regions on the right can be used in the construction of conduit system 50. For example, conduit system 50 can initially be constructed as follows. A conventional nipple 56 may be connected to the contact housing 52. A first conduit part 10a of the invention is then connected to the nipple 56 by a first copy 24 in a similar manner as described above. A second conventional conduit section 42b is then connected to the first conduit part 10a by a second copy 24 and so on until the electrical conduit system has been constructed. By alternatively coupled conduit pieces 10 of the invention and conventional conduit sections 42 by the coupling parts 24 of the invention, the entire conduit system 50 can be constructed without the need to rotate conduit parts 10 or conduit sections 42. by themselves. This greatly reduces the labor required for the construction of the conduit system 50. Furthermore, since none of the conduit parts 10 or the sections 42 need to be rotated, the flexible member, for example, wires or cables being enclosed, can pre-scaled or threaded through the respective pieces of uncoupled duct 10 or sections 42 prior to assembly. This means that the cable does not have to be pulled through the finally constructed system and therefore the risk of damage to the cable is reduced. This is particularly useful with respect to fiber optic cables. Another advantage of the conduit systems 50 with respect to the known systems is that the intermediate portion of the conduit system 50 can be easily accessed to examine or repair specific portions of the cable or to add additional conduit routes or derivations without having to uncouple the conduit. complete system of 50 end conduits. For example, a copy 24 can be rotated to uncouple the end of one of the conduit pieces 10 from the associated end of an adjacent conduit section 42. All that is required is sufficient clearance of approximately one thread length, for example, the length of a threaded region 18 or 20, to allow the end of the selected conduit part 10 to be removed from the copying 24. The other end of the conduit part 10 can then also be uncoupled in a similar manner by simply rotating the conduit part. copy 24 on the other end of the coupling piece 10. Alternatively, the contact piece 10 and the copies 24 of the invention can be retrofitted within the existing electrical conduit system.

For example, the system cable can be pulled back from one end through the region to be accessed. An existing conduit section having right threaded ends can then be removed, such as by cutting and replaced with a conduit part 10 and copies 24 of the invention. This would be particularly useful in retrofitting electrical conduit systems that have elbow pieces located in closed areas, such as inside buildings or inside building walls, where portions of the building typically have to be destroyed to allow enough slack to attach or replace an elbow section. This reduces the cost of replacing or retrofitting existing conduit systems. Furthermore, the present invention is also well adapted for use in the improvement or reformation of existing electrical conduit systems, as well as by the addition of branch lines. For example, to add a branch line to the conduit system 50 of Figure 4, one or more of the conduit parts 10 can be removed as described above and replaced with a conventional splice or bypass line. Additionally, since the conduit piece 10 and copy 24 of the invention can be used with the existing conventional right threaded conduit sections, the conventional invention of conventional conduit sections can be used. An alternative embodiment of the coupling piece of the invention was designated with the number 60 in Figure 5. The coupling piece 60 is configured as a straight conduit piece having a first end 62 with a first external threaded region 64 and a second end 66 with a second external threaded region 68. However in this embodiment, the first threaded region 64 is comprised of threads on the left and the second region 68 is comprised of threads on the right. The coupling piece 60 is particularly well adapted to be placed in the straight section of a conduit route to a position in which the constructor could later wish to access, for example to place a junction box or branch lines. The second end 66 of the conduit piece 60 with right hand threads may be conventionally connected to a conventional conduit section with a conventional copy. However, the first end 62 of the conduit piece 60 can be added by a copy 24 of the invention with an adjacent conventional conduit section. This section of the conduit path can later be accessed simply by decoupling the copy 24, for example, by rotating the copy to uncouple the first end 62 from the adjacent conduit section and then remove it from the contact piece 60 of the conventional copy by rotating the conduit piece 60. Another particularly well-adapted use of the coupling part 10 and the copies 24 of the invention is in the electrical conduit systems for bridge covers enclosing the fiber optic cables. At present, the sections of bridge cover conduit for fiber optic cables are connected by a copying complex to the right. However, these conventional bridge deck copies can typically be removed by hand or with only one screwdriver, allowing unauthorized access to the optical fiber or communication cables running through the electrical conduit system of the bridge deck. This provides less or no protection against vandalism to the cables. However, the present invention can improve this protection. By constructing a bridge deck electrical conduit system using the conduit piece 10 and copies 24 of the invention but which do not allow sufficient clearance to uncouple the end of a piece of conduit 10 from an adjacent copy 24, the Bridge deck ducts can not be accessed. It will be readily appreciated by those skilled in the art that modifications to the invention can be made without departing from the concepts described in the foregoing description. Said modifications will be considered as included within the scope of the invention. And therefore, the particular embodiments described in detail in this document are illustrative only and are not limiting to the scope of the invention.

Claims (20)

1. CLAIMS 1. A duct system comprising: a plurality of duct pieces, in at least one of the duct pieces comprising a first duct part with a first end having a first threaded region and a second end having a second threaded region and at least one copy configured to couple one end of the first conduit part and one end of an adjacent conduit part, the coupling comprises a first threaded portion and a second threaded portion with a grooved region located therebetween, the first threaded portion of the copy is in a different thread direction than the second threaded portion.
2. 2. The system according to claim 1, wherein the first and second threaded regions of the first piece of conduits comprise threads on the left.
3. 3. The system according to claim 1, wherein the first threaded region of the first piece of conduits comprises threads on the right and the second threaded region comprises threads on the left.
4. 4. The system according to claim 1, wherein the first threaded portion of the copie comprises threads to the right and the second threaded portion comprises threads to the left.
5. 5. A duct system comprising: a plurality of first pieces of ducts, each first duct part having a first end with a first threaded region and a second end with a second threaded region with the first and second threaded regions having substantially the same first thread direction; at least a second piece of conduits having a first end with a first threaded region and a second end with a second threaded region with the first and second threaded regions of the second conduit part, each having substantially the same second thread direction with the second thread direction being different from the first thread direction At least one copy, the copy comprises a first threaded portion and a second threaded portion with the first threaded portion having a different thread direction than the second threaded portion with the first threaded portion of the coupling configured to reversibly engage the first threaded region in the first piece of conduit and with the second threaded portion of the coupling configured to reversibly couple the second threaded region in the second conduit part to reversibly couple the first conduit part with the second conduit part.
6. 6. The system according to claim 5, further comprises another copy, the other copy has a first threaded portion and a second threaded portion, with the first threaded portion having a different thread direction than the second threaded portion, the second threaded portion of the other copy configured to couple the first threaded region in the second conduit part and the first threaded portion configured to reversibly couple one end of another first conduit part to couple the first end of the second conduit part with one end of the other piece of conduit.
7. 7. The system according to claim 5, wherein the first thread direction comprises right-hand threads.
8. 8. The system according to claim 5, wherein the second thread direction comprises threads on the left.
9. 9. The system according to claim 5, wherein the first threaded portion of the copie comprises threads to the right and the second threaded portion comprises threads to the left.
10. 10. The system according to claim 5, wherein the copy comprises an internal grooved region located such that when the first and second pieces of duct are coupled by copying, the first end of the first piece of duct ends the second end. of the second piece of duct in the internal grooved region.
11. 11. The system according to claim 5, wherein the first and second threaded regions of the first and second conduit members comprise external threads.
12. 12. The system according to claim 5, wherein the first and second threaded portions of the copy comprise internal threads.
13. 13. A duct system comprising: a plurality of first duct parts having a first end and a second end with the first externally threaded regions located at each end, each first threaded region comprises threads on the right; a plurality of second conduit members having a first end and a second end with a second externally threaded region at each end, each second threaded region comprising threads on the left and a copy located between the first and second adjacent conduit members and configured for reversibly coupling one end of a first piece of conduit with one end of a second piece of adjacent conduit, the copy comprises a first portion of internally threaded right threads configured to couple one end of a first piece of conduit and a second portion of threads To the left internally threaded configured to engage one end of a second piece of conduit, the copy has an internal grooved region located such that when the coupled ends of the first and second piece of conduit are threaded into the copy, the inserted ends end in the internal grooved region.
14. 14. A method for forming a duct system, comprising the steps of: providing a plurality of first duct parts, each first duct part having a first end with a first threaded region and a second end with a second threaded region, with the first and second threaded regions having the same first thread direction; providing at least a second piece of conduit having a first end with a first threaded region and a second end with a second threaded region, with the first and second threaded regions of the second conduit part being in the same second thread direction, with the second thread direction being different from the first thread direction; providing a copy having a first threaded portion and a second threaded portion, with the thread direction of the first and second thread portions being different from one another; coupling the first threaded portion of the copy with a first threaded region at a first end of a first coupling part; coupling the second threaded portion of the copie with a second threaded region at a second end of the second coupling part and rotating the copie in a first direction for threading to the first end of the first coupling part and the second end of the second part of coupling. coupling in the copy until the ends end.
15. 15. The method according to claim 14, wherein the copy has an internal grooved region and the method comprises the rotation of the copy in such a way that the ends of the first and second pieces of duct end in the grooved region.
16. 16. The method according to claim 15 includes the rotation of the copy in a second direction to uncouple the first piece of conduit from the second piece of conduit.
17. 17. The method according to claim 14, which includes inserting a flexible member through the first and second parts of the conduit and copying before coupling the conduit members together.
18. 18. The method according to claim 14, including providing another copy having a first threaded portion and a second threaded portion with the thread directions of the first and second threaded portions of the other copy being different; coupling the second threaded portion of the other copy of the second threaded portion of the other copy with the first end of the second part of the conduit; coupling the first threaded portion of the other part with one end of the other first part of the conduit and rotating the other copy in a first direction to couple the first end of the second part of the conduit with the end of the other first conduit part.
19. 19. A retro-regulation method of a conduit system having a plurality of first conduit members with opposite ends and threaded regions with the same threaded direction located at each end, the first conduit members being coupled by the first conduits having opposite ends with threaded portions with the same thread direction of the threaded regions of the first conduit parts, the method comprises the steps of: removing at least a first piece of conduit and at least one of the first copies; replacing the first piece of conduit removed with a second piece of conduit having a first end and a second end, the first end has a first threaded region with the same direction as the first piece of conduit and the second end has a second threaded region with different thread direction than the first threaded region; replace the first copy removed with a second copy, the second copy comprises a first threaded region having the same direction of the first threaded region of the second piece of conduit and a second threaded portion with the same thread direction of the second threaded region of the second piece of conduit; coupling the second threaded portion of the copy with the second end of the second piece of conduit; coupling the first threaded portion with one end of a first piece of adjacent conduit and rotating the second copy to couple the second end of the second piece of conduit with the adjacent end of a first piece of conduit until the coupled ends of the first and second Second conduit parts end.
20. 20. The method according to claim 19, wherein the second copy comprises a grooved region and the coupled ends of the conduit pieces terminate in the grooved region.