• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:NL193126B
    申请号:NL8701002
    申请日:1987-04-28
    公开日:1998-07-01
    发明作者:Drs Willem Griffioen；Cornelis Leendert De Jong
    申请人:Nederland Ptt；
    IPC主号:
    专利说明:

    1 193126
    Method and device for arranging a cable in a cable guide tube
    The invention relates to a method for arranging a cable in a cable guide tube of the type referred to as a duet, wherein a gas flow directed towards the output end thereof is produced from the input end of a relevant duet and a relevant cable is guided in the input end .
    Such a method is known from European patent application 0.108.590. This publication describes that, according to a conventional technique, cables, such as, for example, optical fiber optic cables, are installed using tensile force. The course of the required tensile force, which, due to the mechanical properties of the cable, must remain less than a permissible value, depends on the geometry of the channel system of guide tubes C'ducts ”), in which bends and / or oscillations generally occur. , the frictional forces between cable and duet, and the properties of the cable. Without taking into account the cable stiffness, the following are important for the required tensile force: the frictional forces arise due to the mass of the cable, and the frictional forces arise due to the tensile stress present in the cable (due to bends and / or oscillations of a relevant duct path). The first-mentioned frictional forces give rise to a tensile force that increases linearly with the installation length. The latter frictional forces give rise to an exponential tensile force with the number of bends or oscillations. This imposes a major limitation on the cable length, which can be installed in one go. Due to the exponential increase in the required tensile force, efforts can be made to keep the cable tension as low as possible. This means that the frictional forces caused by the mass of the cable must be locally compensated. This means that the installation force must spread evenly over the entire length of a cable section to be installed. In a method serving this purpose, a flow of compressed gas (compressed air) is directed from the input end of a relevant duet according to the methods known from European patent application 0108,590, wherein a corresponding cable is introduced into the input end. From said publication it is also known that a device for serving such a method has a cable injecting unit with a hollow, substantially rectilinearly extending cable passage channel extending therethrough, with an input end and an output end for receiving and transmitting a cable to be arranged in the relevant duet, which cable injection unit is further provided with a gas channel opening into the cable feed-through channel, through which compressed gas can be supplied to the cable feed-through channel, as well as with a set of wheels mounted opposite each other and extending partly in the feed-through channel. cable located therebetween and in contact therewith advancing towards the exit end. This known technique is intended for installing lightweight, flexible optical fiber cables. The compressed air flow guided by a duet exerts a drag effect on a cable introduced into the duet, whereby the cable is pulled through the duet to its output end. According to this known technique, the compressed air flow rate is almost linearly dependent (increasing) on the pressure difference existing between the inlet end and the outlet end of a corresponding duct range. The duct path length over which a cable section with a single process run can be installed is hereby limited to approximately 200 m. The above-mentioned patent specification states that this installation length can be increased to approximately 300 m for a cable with a weight of 3 gms / m and at a differential pressure of approx. 55 psi. The two wheels forming part of a cable injection unit according to the above-mentioned patent only serve to compensate for the counteracting forces exerted on the cable, as a result of the pressure difference existing between the interior and the outer environment of the injection unit.
    According to the teaching of the invention described in the above-mentioned patent, it is a requirement that the entrained forces caused by compressed air flow act from the input end to the output end of a corresponding duct range. The object of the invention is to improve the efficiency of the above-mentioned known technique and to broaden the scope of application, all this taking into account the requirement that the cable must be able to be installed in a channel system in which bends and / or windings occur.
    In practice this means that cables can be installed that are thicker and / or heavier and / or stiffer than the cables that can be installed with the known method. It also means that such cables can be installed in a process run over a considerably greater distance 55 than is possible with the known method.
    In the context of the present invention, it is based on the consideration that the pressure gradient caused in a duet and thus the drag effect, is non-constant, and depending on the length of 193126 2, a corresponding duct range may be too small to reduce the frictional forces acting on the grasp the cable to compensate at the start of the duct path. Starting from such a consideration, a method according to the invention is characterized in that pushing forces are exerted on the cable over a given length of the respective duet at the said input end.
    A method according to the invention makes it possible, using the cable stiffness of cables used in practice, more in particular optical fiber cables, to install a cable in a process layer over a duct path length (with bends and windings) of approx. 700 m .
    According to the invention, a device serving for the use of the above-described manner is characterized in that one of the wheels is coupled to a piston which is movably mounted in a compressed gas cylinder 10, such that, when compressed gas is supplied to the compressed gas cylinder, cable transverse forces located between the wheels are exerted; and one of the wheels is coupled to a pressurized gas engine which is capable of providing a driving torque several times greater than the driving torque at the location where a relevant cable is pressed between the wheels. which must act on the cable to compensate for the pressure difference between the pressures inside and outside the cable duct-15 channel.
    It is advantageous to operate two or more cable injection units in tandem. To this end, a device according to the invention is characterized in that the cable injecting unit is composed of two parts which are detachably attached to one another, such that it is possible to remove a cable injecting unit from a cable extending therethrough.
    In order to further improve the efficiency, a device according to the invention is characterized in that the wheels have a hollow tread, wherein such a tread is serrated, which serrations extend substantially parallel to the axis of rotation of the wheel in question. This considerably improves the engagement with the cable, even if it is provided with a lubricant. The latter is of particular advantage in tandem operation. Namely, a lubricant covered cable ends up at the input side of the cable injection unit which is arranged at the output end of a corresponding duct path. In other words, a lubricant-covered cable is then passed between wheels. In summary, the invention results in the following advantages: quick and easy installation, without the need to install a pull cord; low cable rack during installation; 30 relation large installation length per injection unit; and efficient and simple tandem operation, allowing the respective injection units to operate in series with spacings almost independent of the route of the ducting system.
    The invention will be explained in more detail below with reference to the drawing, in which: Figure 1 shows a set of graphs by means of which the essences of the method according to the invention will be plotted; Figure 2 represents a schematic duct path, with a cable section located therein on which a drag effect caused by a compressed gas flow is exerted; Figure 3 shows a graph to illustrate the pushing action exerted on the cable according to the invention; figure 4 represents a schematic cross section of an embodiment which is illustrative of an apparatus for applying the method according to the invention; and figure 5 shows a perspective drawn and disassembled possible embodiment of a cable injecting unit according to the invention.
    45
    The essence of a method according to the invention will be further elucidated in the first instance with reference to figure 1.
    An important consideration underlying the present invention is that the course of pressure in a duct range of length 1, and a pressure at the beginning and end of this range of p (o) and, p (1 respectively) ), is a nonlinear function of the location (x) and can be represented for an isothermal flow by (1), so that the pressure gradient which is a measure of the entrainment effect exerted on the cable 55 by the pressurized gas flow can be described as d (P) = p (o) 2 — p (1) 2 d (x) 21 p (x) (2).
    3 193126
    It is noted that this expression 2 essentially applies to an "empty" duct path. When there is a cable therein, this becomes considerably more complicated. However, the expression 2 appears to be a practical estimate.
    Using the technique described in European patent application 0.108.590 it is possible to locally compensate the frictional forces caused by the mass of the cable. According to this known technique, it is assumed that the pressure drop between the beginning and end of a d (p) duct range is linear. In other words, according to these known techniques, the pressure gradient ryr is considered constant over the entire length of the duct range. It has been deduced that the hydrostatic force ^ per unit of length j (drag effect caused by the compressed air blown into the duct path) can be represented by F d (p). .
    1-dfl) "* 'd" (3).
    See in this connection figure 2, in which a duct path with length 1 and a cable 15 contained therein are shown schematically. The arrow indicates the compressed air flow blown along the cable.
    The frictional force ^ to be compensated per unit of length can be represented by Ü * = f · W (4).
    where f is the coefficient of friction between cable and duet, and W is the cable weight per unit of length 20.
    d (p)
    The graphs shown in figure 1 show the course of the pressure gradient as a function of the position x along a duct range. It is assumed that p (o) = 8.5 bar and p (1) = 1 bar (absolute). The graphs are drawn for illustrative duct lengths of 437 m and 782 m, respectively, for al and a2 assuming that the pressure gradient is a constant p (o) - p (1) d (p) - ^ -, while for b1 and b2 is based on the idea that the pressure gradient ^ -r is non-constant according to the formula (2). Also, based on formulas (3) and (4), the arrow reents indicates the force -Jw required to compensate for frictional force applied to the cable (f = 0.25; 30 W = 0.76 N / m; rd = 13mm; rk = 4.85 mm). In cases a1 and a2 it is assumed that at the duct length 1 = 782 m the pressure gradient is just sufficient to compensate for the frictional forces, while at the duct length 1 = 437 m it is greater than necessary for such compensation.
    The course of curves b1 and b2, which are illustrative of the formula (2), shows the following: for the duct length 1 = 437 m, the pressure gradient over the entire range is always considered and at the input unit just sufficient to measure the pressure cable to compensate effective frictional forces; for the duct length 1 = 782 m, the pressure gradient over a relatively large part of the range is not sufficient to locally compensate the frictional force acting on the cable.
    All this leads to the conclusion that the above-mentioned technique is insufficient to install a cable length greater than a certain limit value, in the case outlined 437 m, in a 40 duet per injection unit. In other words, based on the assumption made in connection with the case a2 and the possible installation length calculated therefrom, it is not possible to install a cable in such a length of duct using only compressed gas flow.
    According to the invention it has now been proposed to exert a pushing force action thereon from the input end of a relevant duct path and using the stiffness of a cable to be installed. Such a pushing force effect fulfills this compensation function where the entraining action of the compressed gas flow blown into the duet is still insufficient to compensate the frictional forces. Thus, as has also been established experimentally, the duct path length over which a single injection unit cable can be installed can be significantly increased. A factor of two compared to a known blow-in technique has proved possible. Illustrative of a cable used in practice is a cable with a stiffness of approximately 0.9 Nm2. Such stiffness is sufficient to prevent "twisting" of the cable when pushing into a duet such that the cable does not compress significantly against the wall, while at the same time the frictional forces, which arise in particular due to the cable stiffness, bends and / or windings in the relevant duct range, appear to be still compensable By using the method according to the invention, it has been found possible to install a cable in a duct section with a length of more than 700 m. Briefly summarized, the method results according to the invention with the following advantages: 193126 4 quick and easy installation; low cable stretch during installation; significant increase in installation length, which is possible with a single injection unit; and several injection units can be serialized in an effective and simple manner 5 used.
    Illustrative of the invention is the following example:
    A duct section with a length of 667 m and an internal diameter of 26 mm is considered. Right-angled bends with a radius of curvature of 1 m and at distances of 150, 250, 400 and 600 m from the cable entry end occur in this section; the trajectory also proceeds with a period of 4 m and a amplitude of 5 cm. The cable to be installed has a diameter of 9.7 cm, a weight of 0.65 N / m and a stiffness of 0.0 Nm2. The coefficient of friction between cable and duct inner wall is 0.25. Compressed air supplied by a compressor with a capacity of 75 1 / sec is used for the installation. (atmospheric) and a maximum working pressure of 7.5 bar (gauge pressure). Using the formula (2), an estimate for the pressure gradient can be calculated as a value of 5.34.10® / p pd / m. This pressure gradient is only large enough after 386 m to have the effective frictional force fW of 0.19 Nm (due to the bends and oscillations present, the effective cable weight per unit of length has been increased by the cable * stiffness) applied to the cable , to cancel temporarily. Numerically, the course of the required pushing force F as a function of the distance x (from the input end of the duct path) has been calculated, as illustrated in figure 3. It has been found that the combination of such a pushing force action and compressed air flow results in the cable in the considered route can be installed.
    For the sake of completeness, it is noted that various negative (bends counteract pushing force development) and positive (moving from position where pushing force is zero because the compressed air exerts an effective drag effect in the part afterwards) effects may play a role. In addition, a change in geometry can have significant consequences. For example, if the oscillations and / or bends 25 are reduced, the length of the duct path in which the cable can still be installed using the combination of compressed air flow and push force action will be greater.
    Figure 4 is illustrative of an exemplary embodiment of an apparatus for applying the method according to the invention. More particularly, Figure 4 shows a schematic cross-section of such a device. Such a device, or cable injection unit, is generally indicated by 1. This unit comprises a tube 2 in which a substantially rectilinear cable feed-through channel 3 is formed. The feed-through channel has an input end 4 through which a cable can be fed into the injection unit, and an output end 5. The output end is arranged to form a gas-tight seal, to be coupled to a respective duet 6 in which the cable is to be installed. Denoted by 7 is an inlet tube opening into the feed-through channel which is intended to be connected to a compressed gas source 35 (compressor - not shown). With a usual flow resistance of the respective duct range and a conventional compressor with a capacity of 75 Itr / sec. and a maximum working pressure of 7.5 bar (overpressure), a compressed gas flow (air flow) with an order of magnitude of 75 l / sec flows through this inlet pipe. A set of wheels 8, 9, 10 and 11 are rotatably mounted in the housing and partially mounted in the feed-through channel. The set of wheels 8 and 9 is carried by a frame 12 hingedly coupled to a piston rod of a piston 13, which is movably mounted in a compressed gas cylinder 14. As shown schematically in Figure 2, both wheels 8 and 9 can be rotated through a gear mechanism mounted on the housing by a pressurized gas engine 15. Opposite the mouth opening of the gas inlet pipe, the cable feed-through channel is bounded by a streamlined pipe 16. This ensures that a cable located in the feed-through channel, despite the strong pressurized gas flow, continues to run substantially in a straight line. In other words, the cable is prevented from being blown into a "twist" there, which would seriously impede the introduction of the cable into the duet. A cable passed through the input opening 4 in the feed-through channel forms a sealing ring 17 schematically drawn. gas-tight sealing As a result of compressed air supplied, a pressure difference is created between the interior and the exterior of the housing, as a result of which a force is exerted on the cable located in the feed-through channel, which direction is opposite to the desired direction of travel of this cable. When compressed air is supplied to the cylinder 14 and to the engine 15, this "oppositely directed" force action is compensated. A pressurized gas engine has the advantage that the drive torque delivered thereby is proportional to the pressure generated in the housing; moreover, a compressed air motor can be braked to a standstill without any harmful consequences when compressed air is supplied, and it can be stopped (if desired for a long time). The latter is particularly advantageous when several cable injection units are used in series (or tandem bandage).
    5 193126
    In the context of the present invention, however, the compressed gas engine is considerably more powerful than is necessary to compensate for the above mentioned "oppositely directed" force action. Illustrative is e.g. an engine capable of delivering three times the force required to compensate for the above action. With a motor thus dimensioned it is achieved that a pushing force effect is exerted on the cable located in the duet over a length region which extends over a certain distance from the beginning of the respective duct path. As explained in connection with Figure 1, such a thrust action eliminates the local frictional action due to friction between the cable and the inner wall of the duet, and the cable's own weight, where the pressure gradient caused by the compressed air flow entrainment effect is still too small to compensate for said frictional effect. In order for the pushing force effect to be effective, it is necessary that the relevant cable has a certain stiffness. Cables used in practice meet this requirement, in practical situations it has been found that using such a pushing force action the duct path length over which a cable can be installed with the aid of a single injection unit can be increased by a factor of about two. The speed at which the cable is fed into a duet can be controlled using a pressure regulator (not shown in Figure 4). In order to promote the engagement between the wheels and the cable to be moved through them, each of the wheels has a hollow tread which is provided with a transverse serration. Such a construction has the advantage that these wheels cannot fill up with material from the cable jacket and any impurities carried by the cable, while slippage is effectively prevented, even when the cable jacket is covered with lubricant.
    In the exemplary embodiment shown in Figure 4, use is made of two driven and two "back pressure" wheels. If required, however, use can also be made of an embodiment with one or more than two driving wheels and one and more than two counter-pressure wheels, respectively.
    In the latter case, it is recommended to use at least two compressed gas cylinders.
    Each pressurized gas cylinder thereby serves a maximum of two wheels, which are then mounted in a frame which is hingedly coupled to the respective piston position. The compressed gas cylinder / piston combination serving to cause the pressing action has the advantage that the compressed force effect exerted on the cable is substantially constant with a given compressed air supply. That is to say, notwithstanding variations in the thickness of the cable, this contact force remains constant. The applied pressure force action is also subject to an upper limit corresponding to the maximum operating pressure of the feed compressor of 7.5 bar. This means that the permissible skull pressure of a cable used in practice with the compressed air cylinder / piston combination used is not exceeded.
    With the construction described above, the motor can be stopped by braking and stopping the cable advanced thereby.
    Figure 4 also shows a coupling or sealing unit 18. Such a unit comprises a housing 19 in which a chamber 20 is recessed, which communicates with the outside environment via an inlet opening 21, an outlet opening 22 and a compressed gas outlet pipe 23. The lead-in end is arranged to form a gas-tight coupling with the end portion of a duct section 24, at the beginning of which a cable injecting unit similar to that shown in Figure 4 is used. The speed 40 at which the compressed air flows into the chamber 20 via the inlet end 21 is mainly determined by the magnitude of the compressed air flow. At values of approx. 7.5 bar and 75 Itr / sec. this speed will be an order of 150 m / sec. to have. For reasons of safety and in order to protect an injection unit placed at the outlet opening 22, the compressed air outlet pipe is designed such that the compressed air supplied, through a widening starting part 25, is braked without creating vortices 45, and is discharged via this pipe 23 to a safe place for operating personnel. Alternatively, this pipe can be dimensioned such that the discharge rate of the compressed gas is reduced to a safe value. The cable 26 installed in the duct path 24 can be led through the outlet opening 22, which is provided with a fast particle-inhibiting inner lining 27 ', to the next cable injection unit, in this case the injection unit 1. Normally the opening 22 is closed by means of a flap 27 hinged to the housing 19, which, in the absence of a cable there, draws against the outside of the housing as a result of acceleration of air flow therein, in such a way that the flap protects against itself at high speed moving particles. This cover can be opened by means of the supplied cable, the inner lining 27 'then fulfilling the function of the cover 27. This cable can then be installed via the injection 55 unit 1 in the duct section 6, which follows the duct section 24. To do this, both injection units must work in series or in tandem. Due to such a tandem operation, each cable injection unit and coupling or termination unit to be used therewith is designed as two
    权利要求:
    Claims (11)
    [1]
    A method for arranging a cable in a cable guide tube of the type referred to as a duet, wherein a gas flow directed towards the output end thereof is produced from the input end of a relevant duet; and a respective cable is fed into the input end, characterized in that at said 45 input end, pushing forces are applied to the cable over a given length of the respective duet.
    [2]
    The method of claim 1, wherein the cable is positioned in an auxiliary guide channel at a location considered in the cable advancement direction before said lead-in end; a pressure which is higher than the pressure existing in the vicinity of the auxiliary guiding channel is caused in this auxiliary guide bend; and on the portion of the cable located in this auxiliary guide channel, auxiliary forces, the direction of which coincides with the desired direction of travel of the cable, are exerted, which auxiliary forces act to generate oppositely directed forces due to the difference between the pressures inside and outside the auxiliary guide channel, to be compensated, characterized in that the action of said auxiliary forces is several times greater than that required for said compensation.
    [3]
    Method according to claim 2, in which use is made of the forces exerted transversely on the cable for causing the auxiliary forces, characterized in that a value which is substantially equal to, but smaller, is chosen for said transverse forces then a shear force value corresponding to the maximum skull pressure that is permissible for the respective cable.
    [4]
    4. A method according to any one of the preceding claims, wherein a lubricant is applied to the outside of the cable, characterized in that the lubricant is viewed in the direction of advancement of the cable, prior to the place where said transverse forces act on the cable, is maintained on the cable outer side.
    [5]
    Apparatus for applying the method according to any one of the preceding claims, comprising: a cable injecting unit with a hollow cable conduit extending substantially rectilinearly extending therethrough, with an input end and an output end for receiving and outputting in the respective duet cable to be fitted, which cable injecting unit further comprises a gas channel opening into the cable passage channel through which compressed gas can be supplied to the cable passage channel, as well as a pair of opposed mounted and partly extending wheels serving in between the passage channel and Cable in contact with it to move in the direction of the exit end, characterized in that one of the wheels is coupled to a piston movably mounted in a compressed gas cylinder, such that when compressed gas is supplied to the compressed gas cylinder, in one between the wheeled cable transverse forces are applied; and one of the wheels is coupled to a pressurized gas engine which is capable of supplying a driving torque several inches greater than the driving torque to act on the cable at the location where a respective cable is fitted between the wheels to compensate for the differential pressure between compensate for the pressures inside and outside the cable duct.
    [6]
    6. Device as claimed in claim 5, characterized in that the compressed gas engine and the compressed gas cylinder are arranged to be coupled to a common compressed gas source.
    [7]
    An apparatus according to claim 6, characterized in that said gas channel is arranged to be coupled together with the compressed gas engine and the compressed gas cylinder to a common compressed gas source; and a pressure reducing valve is arranged between the connection for this compressed gas source and the compressed gas motor for controlling the operation of this motor.
    [8]
    Device according to any one of claims 5-7, characterized in that two wheels are rotatably mounted in a frame hingedly coupled to said piston, said wheels being adapted to cooperate with two opposite and partly in the frame. cable gland reaching wheels; and the compressed gas engine is coupled in a driving relationship to one of the pairs of wheels.
    [9]
    Device according to any one of claims 5-8, characterized by means arranged between the wheels and the exit end, as well as at the location where the gas channel opens into the cable feed-through channel, which means are arranged to prevent the gas channel fed via gas flow impairs the thrust action exerted on the cable by the compressed gas engine and the compressed gas cylinder in combination.
    [10]
    10. Device according to any one of the preceding claims 5-9, characterized in that the wheels have a hollow tread, wherein such a tread is serrated, which serrations extend substantially parallel to the axis of rotation of the wheel in question.
    [11]
    11. Device as claimed in any of the foregoing claims 5-10, characterized in that the cable injecting unit is composed of two releasably fastened parts, all such that such a cable injecting unit can be removed from a cable extending therethrough. Hereby 3 sheets drawing
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    同族专利:
    公开号 | 公开日
    ES2004853A4|1989-02-16|
    GR3003263T3|1993-02-17|
    NL8701002A|1988-11-16|
    GR890300012T1|1989-03-08|
    ES2068995T3|1995-05-01|
    NO920525L|1988-10-31|
    ES2068995T5|1999-01-16|
    NL193126C|2003-11-03|
    DK166338C|1993-08-30|
    US4850569A|1989-07-25|
    DE292037T1|1989-02-16|
    JPS63284505A|1988-11-21|
    CA1282052C|1991-03-26|
    EP0292037A1|1988-11-23|
    CN88102550A|1988-11-16|
    NO171698B|1993-01-11|
    GR3015746T3|1995-07-31|
    DK230788D0|1988-04-27|
    JP2840840B2|1998-12-24|
    EP0427354B2|1998-09-09|
    FI882003A|1988-10-29|
    DK166338B|1993-04-05|
    ES2004853T3|1992-04-01|
    AT117097T|1995-01-15|
    NO881829L|1988-10-31|
    DE3852766D1|1995-02-23|
    DK230788A|1988-10-29|
    DE3852766T2|1995-06-29|
    NO301916B1|1997-12-22|
    EP0427354A3|1992-03-04|
    FI882003A0|1988-04-28|
    NO920525D0|1992-02-10|
    AT67040T|1991-09-15|
    AU1519188A|1988-11-03|
    FI87121C|1992-11-25|
    NO171698C|1993-04-21|
    AU613616B2|1991-08-08|
    EP0427354B1|1995-01-11|
    DE3864578D1|1991-10-10|
    FI87121B|1992-08-14|
    EP0292037B1|1991-09-04|
    EP0427354A2|1991-05-15|
    NO881829D0|1988-04-26|
    CN1020996C|1993-05-26|
    DE3852766T3|1999-04-08|
    US4934662A|1990-06-19|
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    法律状态:
    1988-11-16| A1B| A search report has been drawn up|
    1989-08-16| CNR| Transfer of rights (patent application after its laying open for public inspection)|Free format text: PTT NEDERLAND N.V. KONINKLIJKE - |
    1994-05-02| BC| A request for examination has been filed|
    1999-01-04| R1B| Notice of opposition during period of laying open|Free format text: BRITISH TELECOMMUNICATION PUBLIC LIMITED COMPANY TE LONDON EC1A 7AJ, GROOT-BRITTANNIE (GB). |
    2004-01-05| NP1G| Not automatically granted patents, but text of patent specification modified with respect to the text of examined patent application|
    2007-07-02| V4| Lapsed because of reaching the maximum lifetime of a patent|Effective date: 20070428 |
    优先权:
    申请号 | 申请日 | 专利标题
    NL8701002A|NL193126C|1987-04-28|1987-04-28|
    NL8701002|1987-04-28|NL8701002A| NL193126C|1987-04-28|1987-04-28|
    US07/184,020| US4850569A|1987-04-28|1988-04-20|Method for introducing a cable into a cable guide tube|
    NO881829A| NO171698C|1987-04-28|1988-04-26|PROCEDURE AND SYSTEM FOR INTRODUCING A CABLE IN A CABLE PIPE|
    EP88200793A| EP0292037B1|1987-04-28|1988-04-26|Method and device for introducing a cable into a cable guide tube|
    DE8888200793T| DE3864578D1|1987-04-28|1988-04-26|METHOD AND DEVICE FOR INSERTING A CABLE IN A CABLE GUIDE PIPE.|
    DE198888200793T| DE292037T1|1987-04-28|1988-04-26|METHOD AND DEVICE FOR INSERTING A CABLE IN A CABLE GUIDE PIPE.|
    AT90203138T| AT117097T|1987-04-28|1988-04-26|DEVICE FOR INSERTING A CABLE INTO A CABLING PROTECTION TUBE.|
    AT88200793T| AT67040T|1987-04-28|1988-04-26|METHOD AND DEVICE FOR INSERTING A CABLE IN A CABLE GUIDE PIPE.|
    ES198888200793T| ES2004853T3|1987-04-28|1988-04-26|METHOD AND DEVICE FOR THE INTRODUCTION OF A CABLE INSIDE A CABLE GUIDE TUBE.|
    ES90203138T| ES2068995T5|1987-04-28|1988-04-26|DEVICE FOR INTRODUCING A CABLE IN A PROTECTION TUBE.|
    DE3852766T| DE3852766T3|1987-04-28|1988-04-26|Device for inserting a cable into a cable sheath protection tube.|
    EP90203138A| EP0427354B2|1987-04-28|1988-04-26|Apparatus for introducing a cable into a cable guide tube|
    AU15191/88A| AU613616B2|1987-04-28|1988-04-27|Method and device for introducing a cable into a cable guide tube|
    CA000565178A| CA1282052C|1987-04-28|1988-04-27|Method and device for introducing a cable into a cable guide tube|
    DK230788A| DK166338C|1987-04-28|1988-04-27|PROCEDURE AND APPARATUS FOR INTRODUCING A CABLE IN A CABLE PIPE|
    CN88102550A| CN1020996C|1987-04-28|1988-04-28|Method and device for introducing cable into cable guide tube|
    FI882003A| FI87121C|1987-04-28|1988-04-28|Method and system for inserting a cable into a cable tube|
    JP10442788A| JP2840840B2|1987-04-28|1988-04-28|Method and apparatus for guiding a cable to a cable guide tube|
    GR89300012T| GR890300012T1|1987-04-28|1989-03-08|Method and device for introducing a cable into a cable guide tube|
    US07/338,308| US4934662A|1987-04-28|1989-04-14|Device for introducing a cable into a cable guide tube|
    GR91401891T| GR3003263T3|1987-04-28|1991-12-04|Method and device for introducing a cable into a cable guide tube|
    NO920525A| NO301916B1|1987-04-28|1992-02-10|Apparatus for inserting a cable into a cable guide tube|
    GR950400891T| GR3015746T3|1987-04-28|1995-04-10|Apparatus for introducing a cable into a cable guide tube.|
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