EP0288751A2 - Procédé de fabrication d une electrode réalisant la lithotripsie sans contact - Google Patents
Procédé de fabrication d une electrode réalisant la lithotripsie sans contact Download PDFInfo
- Publication number
- EP0288751A2 EP0288751A2 EP88104804A EP88104804A EP0288751A2 EP 0288751 A2 EP0288751 A2 EP 0288751A2 EP 88104804 A EP88104804 A EP 88104804A EP 88104804 A EP88104804 A EP 88104804A EP 0288751 A2 EP0288751 A2 EP 0288751A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer conductor
- plastic
- electrode
- inner conductor
- 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.)
- Granted
Links
Images
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
Definitions
- the invention relates to an axially backlash-free positive connection between the inner conductor and the outer conductor of an electrode for contact-free lithotripsy by means of shock waves that are generated by sparkover at an electrode.
- connection between the inner conductor, insulation and outer conductor is known to design the connection between the inner conductor, insulation and outer conductor as an adhesive connection.
- adhesive connections do not meet all requirements in practice. They are difficult to check and can come loose during transport or when used under impact loads.
- the connection between the jacket of the sleeve-shaped inner conductor insulation and the bore of the outer conductor is particularly critical because the adhesive connection is subjected to high loads and can tear due to different thermal expansion coefficients of the components when the temperature changes during operation.
- the invention has for its object to connect the inner conductor with the outer conductor of an electrode inexpensively and permanently safely with each other.
- Fig. 1 shows a sectional view of an electrode as it is used for the contact-free crushing of concrements and is described in more detail, for example, in German patents P 26 35 635 and 35 43 881.
- the view shows a metallic (preferably made of brass) inner conductor 2, a sleeve 6 located on the jacket 4 of the inner conductor 2 made of thermoplastic material (for example polycarbonate available under the trademark "Pocan 1505 nature") and a sleeve-shaped outer conductor 8, which like the inner conductor 2 consists of conductive material, for example brass.
- the bore 10 of the outer conductor 8 has a circumferential annular groove 12 in the exemplary embodiment. If the metal sleeve of the outer conductor 8 is heated inductively, for example by means of the induction coil 14 (at 18 to 30 kV), the plastic of the sleeve 6 expands. Due to the greater thermal expansion of the plastic compared to the metal sleeve, the gap between the inner conductor 2 and outer conductor 8 sealed and the plastic pressed into the annular groove 12. After cooling, the plastic remains in the ring groove, since the expansion has gone beyond the plastic area. After cooling (and removal of the induction coil 14), the groove 12 results in a secure, form-fit connection free of axial play, between the inner conductor 2 and the outer conductor 8.
- the inner conductor 2 forms a tip 20.
- the metallic outer conductor 8 is connected to a second electrode tip 24 via a cage 22 formed from wires.
- the plastic 6 expands and lies against the outer sleeve 8.
- the entire wing gap 28 is sealed. With further heating in the area of the grooves 12 in the outer conductor 8, the pressure rises sharply.
- the plastic state is reached, the plastic is forcibly molded into the grooves 12 of the outer conductor 8.
- the entire connection is cooled with cold air (compressed air) which flows out of the openings 30 of the cooling device 32 immediately after molding.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3713884 | 1987-04-25 | ||
DE19873713884 DE3713884A1 (de) | 1987-04-25 | 1987-04-25 | Verbindung einer metallhuelse mit einer in ihrer bohrung befindlichen kunststoffhuelse |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0288751A2 true EP0288751A2 (fr) | 1988-11-02 |
EP0288751A3 EP0288751A3 (en) | 1989-09-27 |
EP0288751B1 EP0288751B1 (fr) | 1994-01-05 |
Family
ID=6326294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88104804A Expired - Lifetime EP0288751B1 (fr) | 1987-04-25 | 1988-03-25 | Procédé de fabrication d une electrode réalisant la lithotripsie sans contact |
Country Status (3)
Country | Link |
---|---|
US (1) | US4938781A (fr) |
EP (1) | EP0288751B1 (fr) |
DE (2) | DE3713884A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4938781A (en) * | 1987-04-25 | 1990-07-03 | Dornier System Gmbh | Method of orienting electrode tips |
US6217531B1 (en) | 1997-10-24 | 2001-04-17 | Its Medical Technologies & Services Gmbh | Adjustable electrode and related method |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4016054A1 (de) * | 1990-05-18 | 1991-11-21 | Dornier Medizintechnik | Funkenstrecke fuer die lithotripsie |
ES2097848T3 (es) * | 1992-09-28 | 1997-04-16 | Hmt Ag | Aparato para la generacion de ondas de choque para la destruccion sin contacto de concreciones en cuerpos de organismos. |
US5420473A (en) * | 1993-10-12 | 1995-05-30 | Thomas; Howard C. | Spark gap electrode assembly for lithotripters |
DE19718512C1 (de) * | 1997-05-02 | 1998-06-25 | Hmt Ag | Verfahren und Vorrichtung zum Erzeugen von Stoßwellen für medizinische Anwendungen |
DE19755985A1 (de) * | 1997-12-17 | 1999-07-01 | Rohwedder Gmbh U Co Kg Praezis | Einbetten von Metallelementen in Kunststoff |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1140247B (de) * | 1960-07-08 | 1962-11-29 | Siemens Ag | Abschlusskopf fuer Isolierrohre fuer Hochspannungsgeraete, z. B. Kabelendverschluesse |
FR2268614A1 (en) * | 1974-04-25 | 1975-11-21 | Coflexip | Metal armoured plastic pipes - for use as hoses under external hydrostatic pressure e.g. underwater oil prodn pipes |
DE2635635A1 (de) * | 1976-08-07 | 1978-02-09 | Dornier System Gmbh | Funkenstrecke zur zerstoerung von konkrementen in koerpern von lebewesen |
GB2093139A (en) * | 1981-02-18 | 1982-08-25 | Jenkins Robert & Co Ltd | Electrically insulating pipe joint |
DE3543881C1 (de) * | 1985-12-12 | 1987-03-26 | Dornier Medizintechnik | Unterwasser-Elektrode fuer die beruehrungsfreie Lithotripsie |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1291109B (de) * | 1964-07-14 | 1969-03-20 | Tecalemit Gmbh Deutsche | Verfahren zum Verschweissen von Kunststoffrohren und nach dem Verfahren ausgebildete Schweissverbindung |
US3798094A (en) * | 1972-01-27 | 1974-03-19 | A Costa | Method of securing a closure member to a plastic container |
DE8619055U1 (de) * | 1986-07-16 | 1986-11-20 | Richard Wolf Gmbh, 7134 Knittlingen | Lithotripsie-Sonde |
DE3713884A1 (de) * | 1987-04-25 | 1988-11-03 | Dornier System Gmbh | Verbindung einer metallhuelse mit einer in ihrer bohrung befindlichen kunststoffhuelse |
-
1987
- 1987-04-25 DE DE19873713884 patent/DE3713884A1/de active Granted
-
1988
- 1988-03-25 EP EP88104804A patent/EP0288751B1/fr not_active Expired - Lifetime
- 1988-03-25 DE DE88104804T patent/DE3886806D1/de not_active Expired - Lifetime
- 1988-04-25 US US07/186,108 patent/US4938781A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1140247B (de) * | 1960-07-08 | 1962-11-29 | Siemens Ag | Abschlusskopf fuer Isolierrohre fuer Hochspannungsgeraete, z. B. Kabelendverschluesse |
FR2268614A1 (en) * | 1974-04-25 | 1975-11-21 | Coflexip | Metal armoured plastic pipes - for use as hoses under external hydrostatic pressure e.g. underwater oil prodn pipes |
DE2635635A1 (de) * | 1976-08-07 | 1978-02-09 | Dornier System Gmbh | Funkenstrecke zur zerstoerung von konkrementen in koerpern von lebewesen |
GB2093139A (en) * | 1981-02-18 | 1982-08-25 | Jenkins Robert & Co Ltd | Electrically insulating pipe joint |
DE3543881C1 (de) * | 1985-12-12 | 1987-03-26 | Dornier Medizintechnik | Unterwasser-Elektrode fuer die beruehrungsfreie Lithotripsie |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4938781A (en) * | 1987-04-25 | 1990-07-03 | Dornier System Gmbh | Method of orienting electrode tips |
US6217531B1 (en) | 1997-10-24 | 2001-04-17 | Its Medical Technologies & Services Gmbh | Adjustable electrode and related method |
CZ297145B6 (cs) * | 1997-10-24 | 2006-09-13 | Medipool Treuhand- Und Beteiligungsgesellschaft Für Medizintechnik Gmbh | Zpusob prizpusobení vzdálenosti elektrod jiskriste v elektrohydraulických systémech s rázovou vlnou |
Also Published As
Publication number | Publication date |
---|---|
DE3713884C2 (fr) | 1989-07-13 |
US4938781A (en) | 1990-07-03 |
DE3713884A1 (de) | 1988-11-03 |
EP0288751B1 (fr) | 1994-01-05 |
EP0288751A3 (en) | 1989-09-27 |
DE3886806D1 (de) | 1994-02-17 |
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