EP0277047A2 - Vorrichtung zum elektrischen Kontaktieren in einem Impuls oder Schockwellen erzeugenden Apparat - Google Patents

Vorrichtung zum elektrischen Kontaktieren in einem Impuls oder Schockwellen erzeugenden Apparat Download PDF

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Publication number
EP0277047A2
EP0277047A2 EP88400009A EP88400009A EP0277047A2 EP 0277047 A2 EP0277047 A2 EP 0277047A2 EP 88400009 A EP88400009 A EP 88400009A EP 88400009 A EP88400009 A EP 88400009A EP 0277047 A2 EP0277047 A2 EP 0277047A2
Authority
EP
European Patent Office
Prior art keywords
electrode
nut
electrical contact
forming
carrying
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.)
Granted
Application number
EP88400009A
Other languages
English (en)
French (fr)
Other versions
EP0277047A3 (en
EP0277047B1 (de
Inventor
Bernard Lacruche
Jean-Paul Aschwanden
Dominique Cathignol
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.)
Institut National de la Sante et de la Recherche Medicale INSERM
Technomed International SA
Original Assignee
Institut National de la Sante et de la Recherche Medicale INSERM
Technomed International SA
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 Institut National de la Sante et de la Recherche Medicale INSERM, Technomed International SA filed Critical Institut National de la Sante et de la Recherche Medicale INSERM
Priority to AT88400009T priority Critical patent/ATE68056T1/de
Publication of EP0277047A2 publication Critical patent/EP0277047A2/de
Publication of EP0277047A3 publication Critical patent/EP0277047A3/fr
Application granted granted Critical
Publication of EP0277047B1 publication Critical patent/EP0277047B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R41/00—Non-rotary current collectors for maintaining contact between moving and stationary parts of an electric circuit
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/04—Sound-producing devices
    • G10K15/06—Sound-producing devices using electric discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/20—Pins, blades, or sockets shaped, or provided with separate member, to retain co-operating parts together
    • H01R13/207—Pins, blades, or sockets shaped, or provided with separate member, to retain co-operating parts together by screw-in connection

Definitions

  • the invention relates essentially to a device ensuring improved electrical contact between an electrical conductor and an electrode or an electrode-carrying element, the use of this device in any device for advancing an electrode or an electrode-carrying element and the incorporation of this device ensuring electrical contact in a device generating high frequency pulses or shock waves.
  • Apparatuses generating high frequency pulses, or shock waves, also called lithotripsers have been known for many years.
  • Some devices include a device for concentrating the pulses on a target focus, can be in particular a truncated ellipsoidal reflector as described in US Patent RIEBER No. 2,559,227.
  • the pulses or shock waves are generated by a discharge or an electric arc between two electrodes which can be made of highly conductive material such as copper or brass and which are mounted on an insulating support.
  • the discharges generated at the electrodes are usually accompanied by metal tearing which leads to rapid wear of the electrodes which have to be changed relatively often.
  • the invention aims to solve a new technical problem consisting in the provision of a device ensuring improved electrical contact between an electrical conductor for supplying electrical current and an electrode or an electrode-carrying element that is electrically conductive in design. simple allowing easy assembly and disassembly of the electrodes or the electrode holder elements with their electrodes.
  • Another object of the present invention is to solve a new technical problem consisting in the provision of a device ensuring an improved electrical contact making a automatic cleaning of surfaces in electrical contact, thus resulting in practically perfect maintenance of electrical conductivity at the level of electrical contact.
  • the present invention also aims to solve a new technical problem consisting in the supply of a solution making it possible to avoid soiling of the electrical contact by a lubricant, or a liquid coming from the cavity filled with liquid in which bathes at least in part of the electrode and / or the electrode holder element.
  • these new technical problems must be resolved so as to allow the use in any advancement device of an electrode or of an electrode-holder element and in particular in a device of advancement of electrodes or elements electrode holder forming part of a device generating pulses of high frequency, or shock waves, thereby making it possible to increase the efficiency of destruction of targets, such as lithiasis or living tissue.
  • the present invention provides, according to a first aspect, a device ensuring improved electrical contact between an electrical conductor for supplying electrical current, forming part of a connector for supplying electrical current, and an electrode, or a carrier element.
  • electrically conductive electrode mounted displaceable in an insulating support, by the presence of permanent electrical contacting means interposed between said electrical conductor and said electrode or the electrode-carrying element, characterized in that said means permanent electrical contact comprise a member forming a fixed position nut, made of an electrically conductive material, having an axial through hole through which the electrode or the electrode holder element passes.
  • the nut-forming element is fixed to an electrically conductive connection plug, by any suitable advantageously electrically conductive means, such as a screw, said connection plug being embedded in the mass of the insulating support and forming part of the connection technology.
  • power supply of the electrode or of the electrode-holder element is provided.
  • the above-mentioned axial orifice is threaded and the electrode or the electrode-holder element comprises a corresponding thread on an appropriate zone covering the extreme positions of displacement of the electrode or the electrode holder.
  • this thread is continuous so as to allow electrical contact over a larger surface.
  • the above-mentioned nut element is formed by two complementary half-discs.
  • each half-disc comprises at least one slot, and preferably two diametrically opposite slots, arranged in the same axial cutting plane, so as to be in coincidence, preferably two by two, when the two half meet.
  • each half-disc comprises a strip and the two strips are diametrically opposite and fixed symmetrically with respect to the center of the nut-forming element.
  • the strip has the shape of a truncated disc sector.
  • the nut-forming element externally comprises an annular housing in which is disposed an elastic return means tending to keep the two half-discs in contact with each other, such that 'a coil spring mounted under tension.
  • the invention could constitute a determining technological contribution thus allowing its use in any device for advancing an electrode or an electrode-holder element, and in particular in a advancement device forming part of a apparatus for generating high frequency pulses or shock waves, this use also forming an integral part of the invention.
  • the invention relates, according to another aspect, to an apparatus for generating pulses of high frequency, or shock waves comprising a device for concentrating these pulses on a target focal point, which may preferably be a truncated ellipsoidal reflector, usually comprising two electrodes arranged to generate a discharge or electric arc between them generating said pulses or shock waves, at least one of the two electrodes being mounted displaceable by means of an electrode advancement device, characterized in that it comprises a device ensuring contact electric as previously defined.
  • a device ensuring improved electrical contact according to the present invention is represented by the general reference number 10.
  • This device 10 provides electrical contact between an electrical conductor represented by the general reference number 12, d electric current supply forming part of an electrical current supply connection, and an electrode 14 or more precisely here an electrode-carrying element 16 carrying the actual electrode 14.
  • This device 10 ensuring an electrical contact is shown here used with a device 18 advancement of the electrode 14 or more precisely here of the electrode-carrying element 16.
  • This device for advancing the electrodes is for example that described and represented in patent application FR-86.06318 filed by the applicants and which comprises a wheel 20 provided with two reverse teeth 22, 24 controlled by two control means 28, 30 arranged in the plane of the teeth and on either side of the wheel 20.
  • These control means 28, 30 here comprise pistons 32, 34 for example controlled hydraulically or pneumatically by being incorporated in the corresponding piston bodies.
  • pistons 32, 34 for example controlled hydraulically or pneumatically by being incorporated in the corresponding piston bodies.
  • the two teeth 22, 24 can be spaced so as to leave a surface area 20a between the teeth 22, 24 having position locking notches 40 cooperating with a locking pawl 42.
  • These locking notches can simply be constituted by recesses clearly visible in Figure 1.
  • the electrode-carrying element 16 is integral in rotation but displaceable in translation relative to the wheel 20 which has for this purpose a coaxial orifice 44 passing through of polygonal section, here square, cooperating with a corresponding square part of the element electrode holder 16.
  • the device 10 ensuring electrical contact comprises an element 50 forming a fixed position nut, made of electrically conductive material, constituting means of permanent electrical contact between the electrical conductor 12 and the electrode-carrying element 16.
  • This nut-forming element 50 has an axial orifice 52 passing through it, through which the electrode passes, more precisely here the electrode-carrying element 16 and it is also observed that the electrical conductor 12 must transmit the electric current to the nut-forming element. 50.
  • the nut-forming element 50 is fixed to an electrically conductive connection plug 54, by any suitable advantageously electrically conductive means, such as than a screw 56.
  • This connection plug 54 is embedded in the mass of the insulating support in which the electrode-carrying element 16 and the control device 18 are movably mounted. This connection plug 54 is naturally part of the connection supply of electric current to the electrode 14 or to the electrode-carrying element 16.
  • the axial orifice 52 passing through is threaded with a thread 60 clearly visible in FIG. 2, and the electrode or the electrode holder element comprises a corresponding thread, not visible, on a suitable zone covering the extreme positions. of movement of the electrode 14 or of the electrode-carrying element 16.
  • Each thread is preferably made continuous to allow electrical contact over a larger surface, but this thread could be discontinuous, such discontinuous threads being well known in the art. skilled in the art.
  • the nut element 50 is formed by two complementary half-discs 50a, 50b.
  • each half-disc 50a, 50b comprises at least one slot 60, 64, and preferably two diametrically opposite slots 60, 62; 64, 66.
  • These slots are arranged in the same axial cutting plane as is understandable from the consideration of Figure 2, so as to be in coincidence, preferably two by two (for example 60 and 64; and 62 and 66), when the two half-discs 50a and 50b are combined.
  • At least half a disc, and preferably both, as shown, comprises a centering strip 68, 70 of dimension corresponding to two coincident slots.
  • a part 68a, or 70a of the strip 68 or 70 is fixed in a slot of the half-disc carrying the strip by any fixing means, for example a pin passing through an orifice 72 or 74 provided in the half-discs 50a and 50b and coming into an orifice 76, 78 provided in the strips 68 and 70. It is understood that the remaining part of the strip is inserted into the slot 64 for the strip 68, or the slot 62 for the strip 70 of the other half disc 50a or 50b.
  • the two strips 68, 70 are arranged diametrically opposite and fixed symmetrically with respect to the center of the nut-forming element, which makes it possible to simplify the joining of the two half-discs 50a and 50b.
  • the strip 68 or 70 has the shape of a truncated sector of a disc as is clearly visible in FIG. 2.
  • the nut element 50 externally comprises an annular housing 80 in which is disposed an elastic return means tending to keep the two half-discs 50a and 50b in contact with one another. other, such as a coil spring mounted under tension. It is thus possible to take a helical spring of length less than the circumference of the annular housing 80 and the ends of which are tucked into each other by a few turns to form an annular helical spring which is then stretched to be placed in the annular housing. 80 where it then exerts a compression force on the two half-discs 50a and 50b one against the other.
  • one of the two half-discs 50a or 50b, here 50b comprises a notch 82 forming a housing for fixing the connection plug 54 which is followed by an orifice 84 allowing the passage of the means of attachment 56 such as a screw from the other side.
  • the nut element 50 is made of an electrically conductive material, and therefore preferably of copper although other electrically conductive materials can be used.
  • this device 10 ensuring an electrical contact, according to the invention, is preferably used in combination with a device 18 for advancing an electrode 14 or an electrode-carrying element 16.
  • the electrode 14, more precisely the electrode holder element 16 is shown in FIG. 1 mounted on the wall 90 of a device for generating and concentrating pulses on a target focal point, which is preferably a truncated ellipsoidal reflector of the type describes by Rieber in US Patent 2,559,227.
  • a truncated ellipsoidal reflector usually comprises two advantageously identical electrodes 14 arranged to generate a discharge or electric arc between them.
  • said pulses are generated at the internal focal point of the ellipsoidal reflector, so that the electrodes are arranged concurrent with this internal focal point to allow these pulses to be concentrated on the other focal point of the ellipsoid where the target to be destroyed will be located.
  • the ellipsoidal reflector part of the wall 90 of which is seen to be electrically conductive, it is necessary to isolate the electrode 14 and the electrode-carrying element 16 from the wall 90 by interposing an insulating support 94 in the internal part to the cavity 92 as clearly represented in FIG. 1, which is of substantially tubular shape ending in a conical front part 96 towards the tip of the electrode 14 so as to allow the electrode 14 to be completely isolated as close as possible to its end 14a.
  • the cavity 92 is filled with a liquid, advantageously water, it is naturally necessary to provide seals 98, 100, 102, 104, 106, 108.
  • the element 50 forming an electrical contact nut is in a fixed position thanks to the connection plug 54 which is embedded, and therefore itself in a fixed position, in the surrounding insulating support. the whole device.
  • the actuation of the control device 18 causes rotation of the wheel 20, while the nut element 50, of fixed position, with its thread 60 cooperating with a corresponding thread forming the screw of the electrode holder element 16 , leads to a movement of advancement or withdrawal of the electrode-carrying element 16 as a function of the direction of rotation given by the advancement device 18 depending on whether one or the other of the pistons 32 or 34 is actuated.
  • An electric current is permanently ensured thanks to the clamping effect of the elastic return element 81, such as a helical spring. Furthermore, an automatic cleaning of the electrical contact takes place thanks to the presence of the thread of the nut element 50 cooperating with the thread of the electrode holder element, thereby eliminating the oxidized particles or any disturbing particle, such as dust or whatever.
  • the nut element 50 constituting an electrical contact element
  • the control device 18 is interposed between the nut-forming element contact 50 and electrode 14.
  • the element 50 forming an electrical contact nut being of fixed position by being fixed in the insulating support by means of the connection plug 54 embedded in the mass of the insulating support, and comprising a thread 60
  • the nut-forming element 50 is thus integrated into the entire system for advancing the electrode 14 or the electrode holder element 16 thus constituting the part forming a fixed position nut, necessary to lead to a lateral displacement (advancement or withdrawal) of the electrode holder element under the effect of the rotation of the wheel 20 by one or other of the pistons 32 or 34.
  • the thread 60 of the element 50 forming an electrical contact nut also fulfills the same function as the thread 170 forming the nut of the insulating support 112b, FIGS. 1 and 2 of document FR-86 06318.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Surgical Instruments (AREA)
  • Disintegrating Or Milling (AREA)
  • Particle Accelerators (AREA)
  • ing And Chemical Polishing (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Contacts (AREA)
EP88400009A 1987-01-29 1988-01-05 Vorrichtung zum elektrischen Kontaktieren in einem Impuls oder Schockwellen erzeugenden Apparat Expired - Lifetime EP0277047B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88400009T ATE68056T1 (de) 1987-01-29 1988-01-05 Vorrichtung zum elektrischen kontaktieren in einem impuls oder schockwellen erzeugenden apparat.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8701083 1987-01-29
FR8701083A FR2610454B1 (fr) 1987-01-29 1987-01-29 Dispositif assurant un contact electrique ameliore entre un conducteur electrique et une electrode ou un element porte-electrode; utilisation de ce dispositif dans tout dispositif d'avancement d'une electrode ou d'un element porte-electrode

Publications (3)

Publication Number Publication Date
EP0277047A2 true EP0277047A2 (de) 1988-08-03
EP0277047A3 EP0277047A3 (en) 1990-02-14
EP0277047B1 EP0277047B1 (de) 1991-10-02

Family

ID=9347400

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400009A Expired - Lifetime EP0277047B1 (de) 1987-01-29 1988-01-05 Vorrichtung zum elektrischen Kontaktieren in einem Impuls oder Schockwellen erzeugenden Apparat

Country Status (9)

Country Link
US (1) US5094220A (de)
EP (1) EP0277047B1 (de)
JP (1) JPS63218168A (de)
AT (1) ATE68056T1 (de)
DE (2) DE3865210D1 (de)
ES (1) ES2027016T3 (de)
FR (1) FR2610454B1 (de)
GR (1) GR3003296T3 (de)
IL (1) IL85152A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2471899A (en) * 2009-07-17 2011-01-19 Dynamic Dinosaurs Bv An electrode assembly for an electrical discharge acoustic source.
WO2016199302A1 (ja) * 2015-06-12 2016-12-15 株式会社牧野フライス製作所 細穴放電加工機

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124686A2 (de) * 1983-05-07 1984-11-14 DORNIER SYSTEM GmbH Funkenstrecke zur Erzeugung von Stosswellen für die beführungsfreie Zertrümmerung von Konkrementen in Körpern von Lebewesen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1930322A (en) * 1933-10-10 Shielded spabx-pluo
FR674147A (fr) * 1929-04-25 1930-01-23 Rondelle écrou à serrage instantané
US2559227A (en) * 1947-05-24 1951-07-03 Interval Instr Inc Shock wave generator
GB647157A (en) * 1947-08-18 1950-12-06 Anglo Iranian Oil Co Ltd Apparatus for the electric arc welding of pipes and like articles
CH574734A5 (de) * 1973-10-12 1976-04-30 Dornier System Gmbh
EP0043387A1 (de) * 1980-07-04 1982-01-13 BBC Aktiengesellschaft Brown, Boveri & Cie. Elektrische Verbindungsanordnung
FR2598074B2 (fr) * 1986-01-31 1989-10-13 Technomed Int Sa Dispositif d'avancement d'un element porte-electrode comportant une roue commandee par pistons, et son utilisation dans un appareil generateur d'impulsions pour la destruction de cibles telles que des tissus, concretions, notamment des lithiases renales, biliaires
JPS6391982A (ja) * 1986-10-03 1988-04-22 株式会社　潤工社 位相調整同軸コネクタ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124686A2 (de) * 1983-05-07 1984-11-14 DORNIER SYSTEM GmbH Funkenstrecke zur Erzeugung von Stosswellen für die beführungsfreie Zertrümmerung von Konkrementen in Körpern von Lebewesen

Also Published As

Publication number Publication date
JPS63218168A (ja) 1988-09-12
IL85152A0 (en) 1988-06-30
GR3003296T3 (en) 1993-02-17
EP0277047A3 (en) 1990-02-14
ES2027016T3 (es) 1992-05-16
DE3865210D1 (de) 1991-11-07
FR2610454B1 (fr) 1989-06-09
US5094220A (en) 1992-03-10
DE277047T1 (de) 1988-11-24
ATE68056T1 (de) 1991-10-15
EP0277047B1 (de) 1991-10-02
FR2610454A1 (fr) 1988-08-05
IL85152A (en) 1991-12-15

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