EP1246207A1 - Appareil d'imagerie à ultrasons et son ensemble de câbles - Google Patents

Appareil d'imagerie à ultrasons et son ensemble de câbles Download PDF

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Publication number
EP1246207A1
EP1246207A1 EP01107990A EP01107990A EP1246207A1 EP 1246207 A1 EP1246207 A1 EP 1246207A1 EP 01107990 A EP01107990 A EP 01107990A EP 01107990 A EP01107990 A EP 01107990A EP 1246207 A1 EP1246207 A1 EP 1246207A1
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EP
European Patent Office
Prior art keywords
cable
insulator
layers
imaging apparatus
cable assembly
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.)
Withdrawn
Application number
EP01107990A
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German (de)
English (en)
Inventor
Roland Lebender
Volker Gronauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WL Gore and Associates GmbH
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WL Gore and Associates GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WL Gore and Associates GmbH filed Critical WL Gore and Associates GmbH
Priority to EP01107990A priority Critical patent/EP1246207A1/fr
Publication of EP1246207A1 publication Critical patent/EP1246207A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • H01B7/08—Flat or ribbon cables
    • H01B7/0892—Flat or ribbon cables incorporated in a cable of non-flat configuration
    • 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
    • H01B7/08—Flat or ribbon cables
    • H01B7/0861—Flat or ribbon cables comprising one or more screens

Definitions

  • the invention relates to an ultrasound diagnostic apparatus having a transducer and a data processing unit connected to each other by a cable assembly.
  • Ultrasound diagnostic apparati are used by doctors and medical technicians as a diagnostic tool to view human body structures, such as organs and tissues.
  • diagnostic apparati provide real-time images of the heart and excellent soft tissue images of the abdomen, making ultrasound systems useful for diagnosing heart problems and indispensable for monitoring pregnancies. Images are produced without the harmful radiation of X-rays and without the long image acquisition time of magnetic resonance imaging (MRI).
  • MRI magnetic resonance imaging
  • an electrical signal (a transmitted signal) is generated and propagated via an electrical signal cable to a transducer which converts the electrical signal into an ultra-high frequency sound or ultrasound signal that is directed to the body.
  • the transducer also receives the ultrasound signal (an information signal) after it is attenuated and reflected back by the body structure and converts it into an electrical signal (a received signal) which is carried by the transducer cable to a data processing unit, such as an image display.
  • the transmitted and received electrical signals are compared by the data processing unit which then generates an image of the body structure from the compared signals. Any disturbances on the electrical signal will degrade the image of the body structure and may thus impact diagnosis.
  • the electrical signal cable must be shielded to prevent external electrical sources from interfering with the electrical signals and should be flexible so that the transducer may be easily manoeuvred and aimed.
  • an ultrasonic signal is continuously transmitted from one section of a piezoelectric crystal in a transducer head.
  • the received signal is detected by another section of the piezoelectric crystal in the transducer head.
  • the quality of the images in these ultrasound systems that can be generated in the data processing unit as already described is dependent on the quality of the information received from the received signals in the transducer head and can be affected by degradation of the received signals as they pass along the electrical signal cable.
  • cross-talk between the transmitted signals and the received signals may degradate the image quality.
  • Electrical signal cables for use in an ultrasound diagnostic apparatus are known, for example, from European Patent Application EP-A-0 735 544 (Cartier et al.) assigned to Hewlett-Packard Company.
  • This patent application describes an ultrasound system with an electrical signal cable for providing an electrical connection between a transducer and a display processor.
  • the third embodiment of the electrical signal cable disclosed in this application uses three layers of extruded ribbon assemblies separated from each other by shield conductors comprising thin strips of bare copper. The stack of ribbon assemblies and shield conductors are extruded with a ribbon jacket to form a desired length of the electrical signal cable.
  • An object of the invention is to improve the quality of the image displayed by the ultrasound diagnostic apparatus whilst maintaining the flexiblity of the electrical signal cable.
  • a further object of the invention is to improve the quality of the signals received by the data processing unit of an ultrasound diagnostic apparatus.
  • Yet a further object of the invention is to reduce the cross-talk between transmitted signals and received signals within an electrical signal cable connecting a data processing unit and a transducer head of an ultrasound diagnostic apparatus.
  • a further object of the invention is to provide a flexible electrical signal cable which has a long lifetime for the particular application.
  • a further object of the invention is to minimise the weight of the cable whilst providing a high quality image.
  • an imaging apparatus having a transducer head and a data processing unit connected to each other by an electrical signal cable.
  • the data processing unit has a signal transmitter for generating control signals provided to the transducer in the transducer head and a signal receiver for processing information signals received by the data processing unit from the transducer head.
  • the electrical signal cable connecting the data processing unit and the transducer head comprises at least two cylindrical layers each of which each has one or more (a plurality) ribbon cables with electrical signal conductors encased within and separated at a pitch distance from each other by an insulating material. The layers are separated by a ground plane connected to AC ground to isolate them from one another.
  • a first plurality of the electrical signal conductors of a ribbon cable in a first one of the at least two cylindrical layers is connected to the signal transmitter and thus carries the transmitted signals.
  • a first plurality of the electrical signal conductors of ribbon cable in a second one of the at least two cylindrical layers in the same embodiment of the invention is connected to the signal receiver and thus carries the received signals.
  • the ground plane is disposed between the first one and the second one of the cylindrical layers and therefore shields the transmitted signals from the received signals. This ground plane therefore substantially minimises the cross-talk between signals in the two cylindrical layers. Hence the quality of the received signals received at the data processing unit and the transmitted signals is improved.
  • the ground layer in the electrical signal is improved cable also comprises a further ribbon cable having a plurality of electrical signal conductors.
  • Each of the plurality of electrical signal conductors is at AC ground potential.
  • AC ground potential means that the signal conductors carry an invariable signal which with respect to the varying information and control signals is constant and thus acts as an electromagnetic shield.
  • the AC ground potential may or may not be at earth potential.
  • the ground plane has therefore the same structure as the at least two ribbon cables carrying the transmitted signals and the received signals and can therefore be manufactured in the same manner. This is furthermore advantageous since the use of similar constructions is found to improve the flex-life of the electrical signal cable as during flexing similar materials move against each other. Yet a further advantage in using this type of construction in comparison to ground foils is that during cable flexing there is no generation of tribostatic charges between the foil and the insulator.
  • an outer shield surrounding the at least two ribbon cables in the electrical signal cable shields the electrical signal conductors within the electrical signal cable from external electromagnetic interference and thus leads to yet a further improvement in signal quality.
  • the plurality of cylindrical layers are cylindrically disposed and preferably surfed about a central axis.
  • This circular construction is found to make cable more flexible and improves the flex-life properties of the electrical signal cable.
  • a tubular spacer disposed within the plurality of ribbon cables is used to keep the construction stable.
  • a jacket is disposed about the at least two ribbon cables to protect these from damage.
  • a further improvement to the flexibility of the cable assembly for the imaging apparatus can be made by placing two ribbon cables adjacent to each other in the same cylindrical layer.
  • One embodiment of the invention has an insulating material for the ribbon cables which comprises an upper insulator attached and preferably laminated to a lower insulator.
  • the upper insulator and the lower insulator are formed from the group of insulating materials consisting of perfluoralkoxy, fluoroethylene-propylene, polyester, polyolefin including polyethylene and polypropylene, polymethylpentene, polytetrafluoroethylene or expanded polytetrafluorethylene. Most preferably they are formed from expanded polytetrafluorethylene. This material is known to have excellent dielectric properties which leads to fast and reliable signal propagation.
  • the material has a low coefficient of friction which leads to an improvement in flex-life properties of the electrical signal cable since the individual layers of the electrical signal cable are able to slide against each other. Furthermore little or no triboelectricity is generated when layers of expanded polytetrafluoroethylene rub against each other.
  • Fig. 1 shows a prior art ultrasound diagnostic apparatus 10 having a transducer head 20 and a data processing unit 30 connected to each other by an electrical signal cable 40.
  • the data processing unit 30 is connected at a proximal end 42 to the electrical signal cable 40.
  • the electrical signal cable 40 is connected to the transducer head 20 at a distal end 44 by means of a termination board 25.
  • the transducer head 20 receives transmitted signals from a signal transmitter 50 in the data processing unit 30.
  • the transducer head 20 generates ultrasound signals which are reflected from an object and received at the transducer head 20.
  • the transducer head 20 converts the received ultrasound signals into electrical received signals which are passed to a signal receiver 60 in the data processing unit 30 along the electrical signal cable 40.
  • Fig. 2 shows a first embodiment of an electrical signal cable 40 for use in the ultrasound diagnostic apparatus 10 of the invention. It comprises a plurality of ribbon cables 70. In Fig. 2 eight ribbon cables 70 are shown. However, this is merely illustrative of the invention and not intended to be limiting.
  • a binder 200 is wrapped about the ribbon cables 70 and spacers 210.
  • a shield 230 is disposed about the binder 200 and a jacket 240 extruded or wrapped about the shield 230.
  • Each ribbon cable 70 comprises a plurality of individual conductors 80 arranged in a parallel plane and surrounded by an upper insulating layer 90a laminated to a lower insulating layer 90b.
  • the individual conductors 80 can be made from any conducting material such as copper, nickel-plated copper, tin-plated copper, silver-plated copper, tin-plated alloys, silver-plated alloys or copper alloys.
  • the individual conductors 80 are made of round copper or alloy wire. It would also be possible to use flat conductors.
  • the individual signal conductors 80 could also have a lacquered insulation layer.
  • the number of individual conductors 80 depicted in Fig. 2 is not intended to limiting of the invention.
  • the axes of the individual conductors 80 are separated by a first pitch distance a which is in the range of 0.1 to 1 mm.
  • the upper insulating layer 90a and the lower insulating layer 90b can be made of any insulating dielectric material such as polyethylene, polyester, perfluoralkoxy, fluoroethylene-propylene, polypropylene, polymethylpentene, polytetrafluoroethylene or expanded polytetrafluoroethylene.
  • Preferably expanded polytetrafluoroethylene is used.
  • the flat cable 70 of this embodiment is manufactured by lamination as is taught in WO-A-99/59165 (Hoffmann) assigned to W.L. Gore & Associates GmbH. It would also be possible to use extrusion techniques to extrude the individual conductors 80 for example within a polyurethane, an FEP-based or a polyester layer. Alternatively foamed or solid polyethylene could be used. Furthermore the upper insulating layer 90a and the lower insulating layer 90b could be adhered together using a thermoplastic adhesive such as polyester adhesive or a polyurethane adhesive.
  • the ribbon cables 70 of the embodiment of Fig 2 are arranged in a planar manner, one above another, to form a bundle as taught in WO 99/59165 (Hoffmann) assigned to W.L. Gore & Associates GmbH.
  • Fig. 3 shows a further embodiment of an electrical signal cable 40 for use in the ultrasound diagnostic apparatus 10.
  • the electrical signal cable 40 of Fig. 3 comprises an optional tubular spacer 300 about a central axis 310 forming the central core of the electrical signal cable 40.
  • Onto the tubular spacer 300 is disposed a first flat cable assembly 330.
  • the structure of the first flat cable assembly 330 will be described later.
  • the tubular spacer 300 is made from permeable ePTFE, PTFE, polyamide, polyurethane, persion or any other suitable material.
  • the tubular spacer 300 may be solid or have a hollow interior to carry cooling fluids, electrical control lines, electrical power lines, gases etc.
  • the tubular spacer 300 may further be made from a braided material and may also act as a strain relief.
  • the first subcable assembly 330 is disposed within a third flat cable assembly 340 and is separated from the third flat cable assembly 340 by a second flat cable assembly 335.
  • the first flat cable assembly 330 depicted in Fig. 3 comprises two layers 332a and 332b, which are each formed of a ribbon cable of the same construction to the ribbon cables 70 of the embodiment of Fig. 2. Each of the layers 332a and 332b is wrapped in the same direction.
  • the third flat cable assembly 340 depicted in Fig. 3 comprises two layers 342a and 342b which are also formed by a flat cable 70 of the same construction as the ribbon cables 70 of the embodiment of Fig. 2.
  • the second flat cable assembly 335 is formed from a single ribbon cable 337 which is wrapped in a direction opposite to the layers 332a, 332b, 342a, 342b.
  • the single ribbon cable 337 is formed by a flat cable 70 of the same construction as the ribbon cable 70 of the embodiment of Fig.2.
  • the second flat cable assembly 335 could be replaced by a metal foil.
  • An outer ground shield 370 is cylindrically disposed about the third flat cable assembly 340.
  • the outer shield 370 is grounded and shields the flat cable assemblies 330, 335 and 340 within the cable assembly 40 from interfering electromagnetic fields.
  • An insulating layer 380 is disposed about the outer ground shield 370 and the electrical signal cable 40 is then placed within a jacket 390.
  • the insulating layer 380 is made, for example, from PTFE, ePTFE, FEP or polyester.
  • the insulating layer 380 is made from sintered GORE-TEX® tape which is obtainable from W.L.Gore & Associates and is wrapped about the electrical signal cable 40 using known wire-wrapping techniques.
  • the outer ground shield 370 is a braid, foil or wire shield made from a metal or a metallised polymer, such as copper, aluminium, tin-plated copper, silver-plated copper, nickel-plated copper, alloys or aluminised polyester.
  • the outer ground shield 370 is made from a copper braid with a braiding angle of about 35°. In some applications, the outer ground shield 370 can be omitted.
  • the jacket 390 is made from silicone or polyolefins such as polyethylene, polypropylene or polyethylpentene; fluorinated polymers such as fluorinated ethylene/propylene (FEP); fluorinated alkoxypolymer such as perfluoro(alkoxy)alkylanes, e.g. a co-polymer of TFE and perfluorproplyvinyl ether (PFA); polyurethane (PU), polyvinylchloride (PVC), silicone, polytetrafluoroethylene (PTFE) or expanded PTFE.
  • the jacket 390 was made from PVC.
  • the jacket is made from ePTFE reinforced with silicone.
  • the first flat cable assembly 330 and the third flat cable assembly 340 are depicted with two layers 332a, 332b and 342a, 342b respectively.
  • the first flat cable assembly 330 and the third flat cable assembly 340 can have any number of layers 332a, 332b, 342a, 342b.
  • the first flat cable assembly 330 and the third flat cable assembly 340 each have between one and three layers 332a, 332b, 342a, 342b.
  • the second flat cable assembly 335 is made of a flat cable 337 of identical construction to the flat cable 70.
  • the flat cable 337 is surrounded by a first binder layer 336 on one side and a second binder layer 338 on the other side.
  • the first binder layer 336 and the second binder layer 338 are made of the same materials as the upper insulating layer 90a and the lower insulating layer 90b and preferably of expanded polytetrafluorethylene. They are wrapped by known wrapping techniques.
  • Manufacture of the layers of the first flat cable assembly 330, the second flat cable assembly 335 and the third flat cable assembly 340 is taught inWO 99/59165 (Hoffman) assigned to W.L. Gore & Associates GmbH.
  • the flat cable 337 of the second flat cable assembly 335 is connected to AC ground potential and thus isolutes the signals being carried on the conductors of 1the third flat cable assembly 340. If the flat cable 337 of the second flat cable assembly 337 is replaced by a metal foil, then this is also placed at AC ground potential.
  • FIG. 4 shows a plurality of ribbon cables 70 which are connected to a rigid board 250. Both layers of the upper insulating layer 90a or the lower insulating layer 90b at one end of the ribbon cable 70 are stripped off, for example by laser ablation, to expose the individual conductors 80. The individual conductors 80 are then soldered or adhered to termination points 260 on the rigid board 250. The termination points 260 are connected to printed circuits (not shown) on the rigid board 250 which are in turn connected to electronic components such as inductors, capacitors or resistors, on the rigid board 250 or other circuitry within the data processing unit 30 or to a transducer. A plastic strip or molded potting 270 is glued across the top surface of the flat cables 70 in order to insulate the exposed ends of the individual conductors 80.
  • Fig. 5 shows another method of connecting the electrical signal cable 40 to the data processing unit 30.
  • the flat cables 70 emanate from the electrical signal cable 40 through a sleeve 280. Both layers of the upper insulating layer 90a or the lower insulating layer 90b are stripped off to expose the individual conductors 80 which are then soldered onto termination points on a termination board 283.
  • a plastic strip or molded potting 285 is placed over the upper surface of the individual conductors 80 to isolate the exposed ends of the individual conductors 80.
  • the termination board 283 is electrically connected to a mother board 287 which contains inductors, capacitors or resistors. This is in turn electrically connected to a connector 290 which is plugged into the data processing unit 30.
  • strain relief 293 made of a material of high tensile strength such as braided perlon cord which is attached to a post 295 on the termination board 283.
  • the strain relief 293 may be connected to or threaded through the tubular spacer 300.
  • Termination of the electrical signal cable 40 to the transducer head 20 is shown in Fig. 6 in which the ribbon cables 70 emanate from the electrical signal cable 40 through a sleeve 280 and are connected on one or two sides of a flexible board 278.
  • the flexible board 278 has a plurality of electrical tracks which are connected to the transducer head 20 and in particular to the transducer crystal (not shown) within the transducer head 20.
  • the strain relief 293 is connected through a hole 277 in a rigid board 272 onto which is mounted the flexible board 278.
  • Fig. 7 illustrates a construction of the electrical signal cable 40 with elements that can be made using the invention.
  • the ribbon cables were served at angles between 30° and 35°.
  • the individual conductors were laminated at a pitch distance of 0.254 mm using the method taught in WO-A-99/59165 (Hoffmann) between a first insulation layer and a second insulation layer made of ePTFE.
  • the insulation layers were each 0.1016 mm thick.
  • conductors made of silver-plated copper of AWG4201 (2mm diameter) were used.
  • the spacer 1800 was made of woven Kevlar yarn over which was extruded a PU layer.
  • the spacer 1800 had a nominal outside diameter of 1.5 ⁇ 0.1 mm.
  • a first ribbon cable 1810 was wrapped about the spacer 1800.
  • a first binder 1820 made of ePTFE was wrapped in the opposite direction about the first ribbon cable 1810.
  • a second ribbon cable 1830 was wrapped in the opposite direction about the first binder 1820.
  • a second binder 1840 was wrapped about the second ribbon cable 1830.
  • a third ribbon cable 1850 was wrapped in the opposite direction about the second binder 1840.
  • a third binder 1860 was wrapped in the opposite direction about the third ribbon cable 1850.
  • a fourth flat cable 1870 was wrapped about the third binder 1860.
  • a fourth binder 1880 was wrapped in the opposite direction about the fourth flat cable 1870.
  • a fifth ribbon cable 1890 was wrapped about in the opposite direction about the fourth binder 1880.
  • a fifth binder 1900 was wrapped about the fifth ribbon cable 1890 in the opposite direction and a sixth flat cable 1910 wrapped in the opposite direction about the fifth binder 1900.
  • a sixth binder 1920 was wrapped in opposite direction about the sixth ribbon cable 1910 and a seventh ribbon cable 1930 in opposite direction about the sixth binder 1920.
  • a seventh binder 1940 was wrapped in opposite direction about the seventh ribbon cable 1930.
  • a eighth ribbon cable 1950 and a ninth ribbon cable 1960 were wrapped in the same direction adjacent to each other about the seventh binder 1940.
  • An eighth binder 1970 was wrapped in opposite direction about the eighth ribbon cable 1950 and the ninth ribbon cable 1960.
  • a tenth ribbon cable 1980 and an eleventh ribbon cable 1990 were wrapped in the same direction adjacent to each other about the eighth binder 1970.
  • a ninth binder 2000 was wrapped in opposite direction about the tenth ribbon cable 1980 and the eleventh ribbon cable 1990.
  • a twelfth ribbon cable 2010 and a thirteenth ribbon cable 2020 were wrapped adjacent to each other in an opposite direction about the ninth binder 2000.
  • a tenth binder 2030 was wrapped in the opposite direction about the twelfth ribbon cable 2010 and the thirteenth ribbon cable 2020.
  • An outer shield 2040 was placed over the tenth binder 2030 and a jacket 2050 extruded over the outer shield 2040.
  • the outer shield 2040 was made by braiding wire of tin plated copper at a braiding angle of 20° using 16 bobbins and 26 ends at 4 picks per inch (2.54cm).
  • the outer jacket was made from extruded PVC and had a thickness of 0.76 mm.
  • the first ribbon cable 1810, the second ribbon cable 1830, the eighth ribbon cable 1950, the tenth ribbon cable 1980 and the twelfth ribbon cable 2010 were made of 16 individual conductors.
  • the third ribbon cable 1850, the fourth ribbon cable 1870, the fifth ribbon cable 1890, the sixth ribbon cable 1910 and the eleventh ribbon cable 1990 were made with 24 individual con ductors.
  • the seventh ribbon cable 1930 and the thirteenth ribbon cable 2020 were made with 32 individual conductors.
  • the seventh ribbon cable 1930 was designed such that the individual conductors are placed at ground.
  • a further embodiment of the invention is conceivable which consists of alternate layers of binder and ribbon cables in concentric arrays.
  • the binders and ribbon cables are wrapped in opposite directions.
  • the ribbon cables are wrapped at slightly different angles in each concentric array so that the electrical conductors do not run parallel to each other over the whole of the electrical signal cable assembly.
  • Figs. 8 and 9 shows exemplary results of cross talk measurements carried out on ribbon cables 70.
  • three ribbon cables 1700a, 1700b and 1700c were disposed one on top of each other.
  • Some of the electrical signal conductors 1710 carried AC ground signals. These are marked in the figs. with a black square.
  • Other ones 1770 of the electrical signal conductors 1720 could carry received or transmitted signals. These are marked as an open square.
  • the middle one of the flat cables 1700b has electrical signal conductors 1710 which all carry an AC ground signal.
  • the electrical signal conductors 1710 In the upper one and the lower one of the ribbon cables 1700a, 1700c every other one of the electrical signal conductors 1710 kept at AC ground potential.
  • the middle one of the ribbon cables 1700b as well as the upper one and the lower one of the ribbon cables 1700a, 1700c have every other electrical signal conductor 1710 kept at AC ground potential.

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EP01107990A 2001-03-29 2001-03-29 Appareil d'imagerie à ultrasons et son ensemble de câbles Withdrawn EP1246207A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01107990A EP1246207A1 (fr) 2001-03-29 2001-03-29 Appareil d'imagerie à ultrasons et son ensemble de câbles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01107990A EP1246207A1 (fr) 2001-03-29 2001-03-29 Appareil d'imagerie à ultrasons et son ensemble de câbles

Publications (1)

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EP1246207A1 true EP1246207A1 (fr) 2002-10-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006128724A1 (fr) * 2005-06-02 2006-12-07 W.L. Gore & Associates Gmbh Tube pour cable plat

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5552565A (en) * 1995-03-31 1996-09-03 Hewlett-Packard Company Multiconductor shielded transducer cable
WO1998038699A1 (fr) * 1997-02-27 1998-09-03 W.L. Gore & Associates Gmbh Procede et agencement pour etablir une connexion electrique
EP0903757A1 (fr) * 1997-09-19 1999-03-24 W.L. GORE & ASSOCIATES GmbH Assemblage de câble pour lignes de signaux électriques
EP0962945A1 (fr) * 1998-05-11 1999-12-08 W.L. GORE & ASSOCIATES GmbH Ensemble de câbles de signaux électriques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5552565A (en) * 1995-03-31 1996-09-03 Hewlett-Packard Company Multiconductor shielded transducer cable
WO1998038699A1 (fr) * 1997-02-27 1998-09-03 W.L. Gore & Associates Gmbh Procede et agencement pour etablir une connexion electrique
EP0903757A1 (fr) * 1997-09-19 1999-03-24 W.L. GORE & ASSOCIATES GmbH Assemblage de câble pour lignes de signaux électriques
EP0962945A1 (fr) * 1998-05-11 1999-12-08 W.L. GORE & ASSOCIATES GmbH Ensemble de câbles de signaux électriques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006128724A1 (fr) * 2005-06-02 2006-12-07 W.L. Gore & Associates Gmbh Tube pour cable plat

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