EP0256203A1 - Générateur d'ondes de choc pour désagréger à distance des concrétions dans un organisme vivant - Google Patents

Générateur d'ondes de choc pour désagréger à distance des concrétions dans un organisme vivant Download PDF

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Publication number
EP0256203A1
EP0256203A1 EP87101806A EP87101806A EP0256203A1 EP 0256203 A1 EP0256203 A1 EP 0256203A1 EP 87101806 A EP87101806 A EP 87101806A EP 87101806 A EP87101806 A EP 87101806A EP 0256203 A1 EP0256203 A1 EP 0256203A1
Authority
EP
European Patent Office
Prior art keywords
membrane
shock wave
wave generator
housing
resilient means
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Withdrawn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
EP87101806A
Other languages
German (de)
English (en)
Inventor
Matthias Dipl.-Ing. Mahler
Sylvester Dipl.-Ing. Oppelt (Fh)
Manfred Rattner
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0256203A1 publication Critical patent/EP0256203A1/fr
Withdrawn legal-status Critical Current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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated

Definitions

  • the invention relates to a shock wave generator for a device for contactlessly crushing concrements in the body of a living being, which has a liquid-filled housing, a membrane that closes it and connected to it along its edge, and means for driving the membrane in a shock-like manner.
  • shock wave generator is known from DE-OS 33 12 014.
  • the membrane is driven electromagnetically.
  • the shock waves emanating from this are taken by suitable measures on the concrement, e.g. B. focused on a person's kidney stone to smash it.
  • the membrane of the known shock wave generator is attached to the housing in such a way that it is firmly clamped along its entire edge.
  • the diaphragm is driven abruptly, it is subjected to sudden bending stresses, which can lead to overstressing of the diaphragm and ultimately to its failure.
  • the shock waves generated with the known shock wave generator differ in shape and pressure distribution in the shock front from the desired ideal, with the result that the shock waves occur only to a limited extent the concessions to be smashed elements can be focused, ie the focus that can be achieved has a relatively large spatial extent, which is detrimental to the effectiveness of the shock waves.
  • the invention has for its object to design a shock wave generator of the type mentioned so that overstressing the membrane and harmful deformation of the membrane with respect to the focusability of the shock waves are excluded.
  • this is achieved in that elastically resilient means are provided between the housing and the membrane in the direction of movement thereof, by means of which the membrane is connected to the housing essentially without bending moments.
  • the membrane as a whole can move under the action of the means for driving it in the direction of the force driving it. Deformations of the membrane resulting from the way in which they are attached to the housing are thus largely avoided in the shock wave generator according to the invention.
  • the membrane therefore has a longer service life than the known shock wave generator, and the shock waves generated with the shock wave generator according to the invention are easier to focus.
  • the resilient means are formed by a rubber spring.
  • the rubber spring can expediently be integrally connected to the membrane and the housing, for example by vulcanization, whereby both the fastening of the membrane to the housing and a good sealing effect between the two are achieved in a simple manner.
  • a particularly favorable strain on the rubber spring is obtained if, according to a variant of the invention, it is arranged between surfaces of the housing and the membrane opposite one another in the direction of movement of the membrane, such an arrangement in which the rubber is preferred mifeder and the vulcanizations existing between this and the housing or the membrane are essentially stressed.
  • the resilient means are designed as plate springs or tubular hollow springs attached to the edge of the membrane, which may have a zigzag-like, meandering or wavy cross-section to ensure sufficient flexibility in the direction of movement of the membrane .
  • the resilient means are formed in one piece with the membrane.
  • the shock wave generator according to the invention shown in FIG. 1 has a housing 1 which encloses a space 2 filled with a liquid, which is closed by a plate-shaped membrane 3. Opposite this, a spirally wound coil 4 is arranged on an insulator 5, which is accommodated in a cap 6, which is fastened to the housing 1 by means of screws 7. At the same time, the membrane 3 is connected to the housing 1 along its edge via a ring 8, which is held between the housing 1 and the cap 6 by means of the screws 7.
  • the membrane 3 consists of an electrically conductive material and can be driven in a pulsed manner by means of the coil 4 by connecting it to a schematically illustrated high-voltage supply 10 by means of suitable switching means 9.
  • the high-voltage supply 10 gives a pulse-like current surge to the coil 4, whereby this builds up a magnetic field.
  • a current of opposite direction is induced in the membrane 3, which causes an opposing magnetic field.
  • the membrane 3 is thus abruptly repelled by the coil 4, which creates a shock wave in the liquid in the space 2, which is focused on a concrement with suitable means, not shown, and crushes it.
  • elastically resilient means are provided between the housing 1 and the membrane 3 in the direction of movement thereof, which are designed as tubular, at the edge of the membrane 3 attached hollow spring 11, the membrane 3 essentially free of bending moments via the ring 8 with the housing 1 connects.
  • the hollow spring 11 has a meandering cross section. The hollow spring 11 is fastened to the edge of the membrane 3 as well as to the ring 8 by liquid-tight welds.
  • FIGS. 2 to 5 differ from the exemplary embodiment according to FIG. 1 only with regard to the design of the resilient means, which is why the same parts are given the same reference numbers as in FIG. 1.
  • the resilient means as a plate spring 12 are used to ensure one sufficient flexibility in the direction of movement of the membrane 3 serving corrugated cross section.
  • the plate spring 12 is attached with its inner edge to the edge of the membrane 3 and with its outer edge to the ring 8 in a liquid-tight manner by soldering.
  • the resilient means are designed as a conical disc spring 13.
  • This embodiment is particularly advantageous when only small amplitudes of the membrane 3 occur.
  • the plate spring 13 is attached with its inner edge to the membrane 3 by a liquid-tight soldering, while it is provided on its outer edge with a flat flange 14 which is held between the cap 6 and the housing 1 by means of the screws 7.
  • the shock wave generator according to the invention according to FIG. 4 has a membrane 3, on the edge of which the resilient means designed as a plate spring-like ring section 15 with a zigzag-like cross section are integrally formed. At the outer edge of the ring section 15, the ring 8 is integrally formed, via which the membrane 3 is held on the housing 1 by means of the screws 7.
  • FIG. 5 shows a shock wave generator according to the invention, in which the elastically resilient means are formed by a rubber spring 16 of approximately oval cross section, which are arranged between surfaces 17 and 18 of the housing 1 and the membrane 3 facing each other in the direction of movement of the membrane 3 and with the surfaces 17 and 18 is connected by vulcanization.
  • the arrangement is such that the rubber spring 16 is compressed when the diaphragm 3 is driven in a jerky manner, as a result of which impermissible stresses on the connections produced by vulcanization the rubber spring with the membrane 3 or the housing 1 can be avoided.
  • the resilient means can also be designed differently than described in the exemplary embodiments, provided that it is only ensured that they have sufficient flexibility in the direction of movement of the membrane to allow it to move in its entirety without being subjected to bending moments.
  • connection of the elastically resilient means to the membrane or the housing can be made differently than shown in the exemplary embodiments, also non-positively or frictionally.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Surgical Instruments (AREA)
EP87101806A 1986-06-05 1987-02-10 Générateur d'ondes de choc pour désagréger à distance des concrétions dans un organisme vivant Withdrawn EP0256203A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3618903 1986-06-05
DE3618903 1986-06-05

Publications (1)

Publication Number Publication Date
EP0256203A1 true EP0256203A1 (fr) 1988-02-24

Family

ID=6302321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87101806A Withdrawn EP0256203A1 (fr) 1986-06-05 1987-02-10 Générateur d'ondes de choc pour désagréger à distance des concrétions dans un organisme vivant

Country Status (3)

Country Link
US (1) US4794914A (fr)
EP (1) EP0256203A1 (fr)
JP (1) JPS62290448A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4879993A (en) * 1986-10-29 1989-11-14 Siemens Aktiengesellschaft Shock wave source for generating a short initial pressure pulse
DE8706039U1 (de) * 1987-04-27 1988-08-25 Siemens AG, 1000 Berlin und 8000 München Stoßwellengenerator für eine Einrichtung zum berührungslosen Zertrümmern von Konkrementen im Körper eines Lebewesens
DE3743822A1 (de) * 1987-12-23 1989-07-13 Dornier Medizintechnik Elektromagnetische stosswellenquelle
US8876838B2 (en) * 2008-03-07 2014-11-04 Kevin Winiarski Anti-choking device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561368A (en) * 1946-01-09 1951-07-24 Harvey C Hayes Electromagnetic underwater sound projector and receiver
US2978669A (en) * 1954-03-08 1961-04-04 Harris Transducer Corp Underwater electrodynamic acoustic transducer with air-filled composite diaphragm
US3495211A (en) * 1968-04-09 1970-02-10 Us Navy Stainless steel diaphragm sonar transducer apparatus
DE8413031U1 (de) * 1984-04-27 1984-07-05 Siemens AG, 1000 Berlin und 8000 München Einrichtung zum berührungslosen Zertrümmernvon Konkrementen
DE3447440A1 (de) * 1984-12-27 1986-07-03 Siemens AG, 1000 Berlin und 8000 München Stosswellenrohr fuer die zertruemmerung von konkrementen

Also Published As

Publication number Publication date
JPS62290448A (ja) 1987-12-17
US4794914A (en) 1989-01-03

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Inventor name: MAHLER, MATTHIAS, DIPL.-ING.

Inventor name: OPPELT, SYLVESTER, DIPL.-ING. (FH)

Inventor name: RATTNER, MANFRED