EP0457037B1 - Funkenstrecke für die Lithotripsie - Google Patents

Funkenstrecke für die Lithotripsie Download PDF

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Publication number
EP0457037B1
EP0457037B1 EP91105911A EP91105911A EP0457037B1 EP 0457037 B1 EP0457037 B1 EP 0457037B1 EP 91105911 A EP91105911 A EP 91105911A EP 91105911 A EP91105911 A EP 91105911A EP 0457037 B1 EP0457037 B1 EP 0457037B1
Authority
EP
European Patent Office
Prior art keywords
spark gap
insulation
conductor
outer conductor
inner conductor
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.)
Expired - Lifetime
Application number
EP91105911A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0457037A1 (de
Inventor
Harald Dipl.-Phys. Eizenhöfer
Michael Dr.-Ing. Müller
Friedrich Dr.-Ing. Überle
Reiner Dr. Rer. Nat. Schultheiss
Peter Dipl.-Ing. Buchbauer
Herbert Weiler
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.)
Dornier Medizintechnik GmbH
Original Assignee
Dornier Medizintechnik 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 Dornier Medizintechnik GmbH filed Critical Dornier Medizintechnik GmbH
Publication of EP0457037A1 publication Critical patent/EP0457037A1/de
Application granted granted Critical
Publication of EP0457037B1 publication Critical patent/EP0457037B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a spark gap for underwater shock wave generation, in particular for non-invasive lithotripsy, with a coaxial arrangement of an inner conductor (IL) with an inner electrode, an insulation (I) and an outer conductor (AL) with a bracket (B) and an outer electrode.
  • IL inner conductor
  • I insulation
  • AL outer conductor
  • Such a spark gap is known from DE-PS 26 35 635 and forms the preamble of claim 1. From DE-PS 35 43 881 a spark gap with optimized field line distribution is known.
  • the object of the invention is to improve a spark gap for the generation of shock waves in such a way that it can be produced more cheaply.
  • the ratio of the inner diameter of the outer conductor to the outer diameter of the inner conductor is preferably in the range from 3: 1 to 8: 1.
  • the length of the inner conductor is preferably 20-60% of the length of the outer conductor.
  • the field line inclination is optimized, which results in a more uniform ignition (less scatter) and a longer service life. This is achieved by suitable shaping of the interface between the insulator tip and water in the tip region of the inner conductor, in accordance with the features disclosed in DE-PS 35 43 881 , in particular the stronger version of the insulator tip. This results in a field line focusing (constriction) on the axis, which leads to a more uniform spark jump.
  • a bracket with an even number of arms is used to hold the outer electrode. This results in less shading of the shock wave than in models with more arms, higher efficiency and a longer service life if the arms are dimensioned accordingly.
  • they can consist of 2 mm thick material, e.g. from steel.
  • the spark gap is surrounded by a second insulation which has projections which engage in incisions in the outer conductor and extend as far as the inner insulation. This gives the spark gap high mechanical stability.
  • Both figures each show an embodiment of a spark gap according to the invention.
  • the inner conductor IL is separated from the outer conductor AL by the insulation I.
  • the coaxial design of the two conductors IL and AL can be clearly seen.
  • the outer conductor AL is surrounded by a second insulation I2.
  • the two arms of the bracket B, which carry the outer conductor electrode, are fastened to the outer conductor AL on the left-hand side.
  • the inner conductor IL tapers on the left side to the inner electrode, which lies opposite the outer electrode.
  • the inner conductor IL has a strong embossing (corrugation) with which it is anchored in the injection molded part of the insulation I.
  • the outer diameter of the inner conductor IL is relatively small compared to the inner diameter of the outer conductor.
  • the outer conductor AL is considerably longer than the inner conductor IL and protrudes far beyond the inner conductor at the rear end of the spark gap.
  • the spark gap has a cavity HO inside the insulation I, which is open in the direction of the rear end of the spark gap and which is delimited in the opposite direction by the inner conductor IL itself and its enclosure by the insulation I.
  • the cavity HO has a length, measured along the main axis of the spark gap, of several cm.
  • the insulation I carries this inner conductor IL and protects it from shifts.
  • the cavity HO in the insulation I runs like a cylinder or - as drawn here - slightly conical and can thus be used for easy placement on the current-carrying connector.
  • the outer conductor insulation I2 is reinforced in a ring, so that the spark gap at this ring can be easily pulled out of the device.
  • FIG. 1 shows a section through a spark gap according to the invention along the line A-A.
  • the coaxial structure with the inner conductor IL, the surrounding insulation I, the outer conductor AL and the second insulation I2 can be clearly seen again.
  • the cut A-A is made at the point where the outer conductor AL has openings through which the outer insulation I2 can penetrate through to the inner insulation I, which provides a kind of snap lock for the secure connection and the simple production of the entire spark gap.
  • Fig. 2 shows an embodiment of a spark gap according to the invention with twisted bracket arms B, which thereby show a stronger spring action.
  • the entire length of the arms extending from the insulator does not run parallel to the main axis of the spark gap, but instead twisted (axis of rotation is equal to the main axis of the spark gap).
  • axis of rotation is equal to the main axis of the spark gap.
  • bracket arms come out of the insulator parallel to the main axis of the spark gap, run somewhat obliquely after a kink, and run again parallel to the main axis to the front after another kink.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Insulators (AREA)
  • Surgical Instruments (AREA)
  • Spark Plugs (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
EP91105911A 1990-05-18 1991-04-13 Funkenstrecke für die Lithotripsie Expired - Lifetime EP0457037B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4016054 1990-05-18
DE4016054A DE4016054A1 (de) 1990-05-18 1990-05-18 Funkenstrecke fuer die lithotripsie

Publications (2)

Publication Number Publication Date
EP0457037A1 EP0457037A1 (de) 1991-11-21
EP0457037B1 true EP0457037B1 (de) 1995-12-06

Family

ID=6406739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105911A Expired - Lifetime EP0457037B1 (de) 1990-05-18 1991-04-13 Funkenstrecke für die Lithotripsie

Country Status (4)

Country Link
US (1) US5195508A (https=)
EP (1) EP0457037B1 (https=)
JP (1) JPH07106207B2 (https=)
DE (2) DE4016054A1 (https=)

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JP3594610B2 (ja) * 1994-09-21 2004-12-02 エイチエムティー ハイ メディカル テクノロジーズ エントヴィックルングス−ウント フェアトリープス アクチエンゲゼルシャフト 医療用衝撃波発生装置
US7189209B1 (en) * 1996-03-29 2007-03-13 Sanuwave, Inc. Method for using acoustic shock waves in the treatment of a diabetic foot ulcer or a pressure sore
IT241710Y1 (it) * 1996-06-20 2001-05-17 Fina Ernesto Dispositivo per la elettrolisi endocavitaria dei calcoli urinari oelettrolitolisi
US6390995B1 (en) 1997-02-12 2002-05-21 Healthtronics Surgical Services, Inc. Method for using acoustic shock waves in the treatment of medical conditions
DE19718512C1 (de) * 1997-05-02 1998-06-25 Hmt Ag Verfahren und Vorrichtung zum Erzeugen von Stoßwellen für medizinische Anwendungen
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RU2155542C2 (ru) * 1998-04-24 2000-09-10 Захаров Виктор Николаевич Блок подводного разрядника для дробления конкрементов
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ES2703539T3 (es) 2013-03-11 2019-03-11 Northgate Tech Inc Litotriptor electrohidráulico no focalizado
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Also Published As

Publication number Publication date
DE4016054A1 (de) 1991-11-21
DE4016054C2 (https=) 1993-06-09
US5195508A (en) 1993-03-23
JPH04231035A (ja) 1992-08-19
DE59107010D1 (de) 1996-01-18
JPH07106207B2 (ja) 1995-11-15
EP0457037A1 (de) 1991-11-21

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