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EP0993678B1 - Pyrotechnic active element - Google Patents

Pyrotechnic active element Download PDF

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Publication number
EP0993678B1
EP0993678B1 EP98937540A EP98937540A EP0993678B1 EP 0993678 B1 EP0993678 B1 EP 0993678B1 EP 98937540 A EP98937540 A EP 98937540A EP 98937540 A EP98937540 A EP 98937540A EP 0993678 B1 EP0993678 B1 EP 0993678B1
Authority
EP
European Patent Office
Prior art keywords
base
holding
pyrotechnic
base element
active element
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
EP98937540A
Other languages
German (de)
French (fr)
Other versions
EP0993678A1 (en
Inventor
Heinz Kern
Wolfgang Mosig
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.)
Dynamit Nobel AiIS Automotive Ignition Systems GmbH
Original Assignee
Dynamit Nobel AG
Dynamit Nobel GmbH Explosivstoff und Systemtechnik
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 Dynamit Nobel AG, Dynamit Nobel GmbH Explosivstoff und Systemtechnik filed Critical Dynamit Nobel AG
Publication of EP0993678A1 publication Critical patent/EP0993678A1/en
Application granted granted Critical
Publication of EP0993678B1 publication Critical patent/EP0993678B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/006—Explosive bolts; Explosive actuators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/006—Opening by severing a conductor

Definitions

  • the invention relates to a pyrotechnic active element for Cutting media and / or fluids.
  • a pyrotechnic active element for Cutting media and / or fluids is such.
  • DE 42 11 079 A1 and DE 44 22 177 are pyrotechnic working fuse elements described that a housing having a cavity formed therein, by which transversely to its longitudinal extent in the case of a Electrical conductor to be cut over current extends.
  • a separating piston is arranged in the cavity, when a pyrotechnic charge is fired in the direction is advanced on the conductor to cut it.
  • the invention has for its object a pyrotechnic Active element with a reduced number of components to be installed separately during assembly create.
  • a pyrotechnic is used to achieve this object Active element with the features of claim 1 proposed.
  • the active element according to the invention has, so to speak Carrier for the pyrotechnic charge the electrical Ignition element and to hold the contacts of the Ignition element on a base element with which the separating element connected is.
  • This connection is moisture-tight and in particular gastight, so that when storing the pyrotechnic active element, the pyrotechnic charge not through external influences (intrusion of Moisture) becomes inoperable.
  • the mechanical Connection of base element and separating element is on the one hand so mechanically firm that both parts at Handling and especially when assembling in a parent Unit (e.g. installation in the housing of a electrical fuse element) not inadvertently from each other to solve.
  • connection must be of base element and separating element when the pyrotechnic charge ignites properly, reliably solve without the need for a significant force is so that the entire when the pyrotechnic ignition Charge released energy in kinetic energy of the Separating element is implemented.
  • the pyrotechnic active element according to the invention is generally used in higher-level units at who are concerned with a medium (e.g. an electrical Conductor) or a flowing fluid (liquid or Gas flow or viscous substances) to cut or to interrupt.
  • a medium e.g. an electrical Conductor
  • a flowing fluid liquid or Gas flow or viscous substances
  • the separation tool of the Separating element made of a suitable material (e.g. metal, Ceramic, plastic).
  • the separating tool consists of a securing element non-conductive material, preferably plastic, wherein here in particular materials from the raw material groups Polyamide, polycarbonate, polyphenylene sulfide or the like with mineral, organic or inorganic fillers are to be mentioned.
  • the releasable connection between the base element and the separating element up to a minimum strength cohesive, frictional and / or positive is what in particular by gluing, (Ultrasonic) welding, caulking, blockage or Can be locked.
  • the connection between the separating element and the base element is preferably provided with predetermined breaking points, that break open when the pyrotechnic charge explodes and release the separator.
  • the separator of the Active element according to the invention has the separating tool and a holding element holding this, preferably is integrally formed with the separating tool.
  • Realization of the tightness of the system of the separating element and the base element is provided at least one O-ring.
  • This sealing ring is preferably in a circumferential groove arranged of the base element or the separating element and lies in its area projecting beyond the circumferential groove close to the other element.
  • the holding element the separating element (or alternatively the base element) preferably has a protruding wrap-around collar, which the base element (or alternatively the holding element) encloses.
  • the figures 1 and 2 show a side view of FIG Longitudinal section through a pyrotechnic active element 10, the has a base element 12 and a separating element 14 which are welded to one another at 16 points. Both Parts of the active element 10 consist of the same plastic material and can therefore be ultrasonically welded.
  • the base element is rotationally symmetrical and in particular provided with cylindrical individual sections. Viewed in its axial extent In the middle section, the base element has a collar 18 from which extensions 20, 22 extend on both sides, which are smaller in diameter than the collar 18.
  • An the front end 24 of an approach 20 is located an electrical igniter 26 and a pyrotechnic Charge 28 while from the front End 30 of the other approach 22 two electrically with the Ignition element 26 connected pins 32 protrude.
  • the separating element 14 has a cylindrical holding element 34 on that with an axially projecting collar 36 is provided which the igniter 26 and the approach 20 carrying pyrotechnic charge 28 of the Surrounds base element 12 from the outside and on the collar 18th of the base element 12 rests with which it is welded in a punctiform manner is.
  • the encircling collar 36 has several axial projections 38 on the collar 18 of the base member are welded at 16.
  • a separating tool 40 that extends along of the diameter of the holding element 34 extends from protrudes axially.
  • the cutting tool 40 is according to Art a cutting edge and is integral with the Holding element 34 connected.
  • the outer diameter of the encircling collar 36 is approximately equal to the outer diameter of the collar 18 of the base element 12 chosen while its thickness is approximately the same the diameter difference of the collar 18 and the from Wrapping collar 36 enclosed approach 20 of the base element 12 is.
  • a circumferential sealing ring 44 is provided, which in opposite Circumferential recesses 46 and 48 on the outside of the neck 20 and the inside of the collar 36 is arranged.
  • the active element 10 is, for. B. in an electrical Securing element, as described in DE 42 11 079, used.
  • the igniter 26, the pyrotechnic charge 28 and the Base and the separating element 12 or 14 as prefabricated Unit can be installed.
  • FIGS. 3 to 6 shown two more Embodiments of the pyrotechnic active element 10 ' and 10 "correspond largely to their structure pyrotechnic active element 10 according to FIGS. 1 and 2. To this extent, in the FIGS. 3 to 6 the same reference numerals used for identical or functionally identical parts.
  • the difference of the active element 10 'compared to that Active element 10 consists in the type of mechanical connection of the separating element 14 with the base element 12.
  • the Approach 20 of the base element namely in its transition area a circumferential constriction 50 to the collar 18, into which the free end of the collar 36 through plastic deformation plunges into it. This is what happens a mechanical connection with for assembly and the Handling the active element 10 'sufficient strength.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Fuses (AREA)
  • Actuator (AREA)
  • Automotive Seat Belt Assembly (AREA)

Description

Die Erfindung betrifft ein pyrotechnisches Wirkelement zum Durchtrennen von Medien und/oder Fluiden. Ein solches Wirkelement gemäß Oberbegriff von Patentanspruch 1 ist z. B in US-A-3 728 934 beschrieben.The invention relates to a pyrotechnic active element for Cutting media and / or fluids. Such an active element according to the preamble of claim 1 is such. B in US-A-3 728 934.

In DE 42 11 079 A1 und DE 44 22 177 sind pyrotechnisch arbeitende Sicherungselemente beschrieben, die ein Gehäuse mit einem darin ausgebildeten Hohlraum aufweisen, durch den sich quer zu dessen Längserstreckung ein im Fall eines Überstroms zu durchtrennender elektrischer Leiter erstreckt. In dem Hohlraum ist ein Trennkolben angeordnet, der bei Zündung einer pyrotechnischen Ladung in Richtung auf den Leiter vorbewegbar ist, um diesen zu durchtrennen.DE 42 11 079 A1 and DE 44 22 177 are pyrotechnic working fuse elements described that a housing having a cavity formed therein, by which transversely to its longitudinal extent in the case of a Electrical conductor to be cut over current extends. A separating piston is arranged in the cavity, when a pyrotechnic charge is fired in the direction is advanced on the conductor to cut it.

Die Montage und der Aufbau der bekannten pyrotechnischen Sicherungselemente ist recht aufwendig und die pyrotechnischen Elemente wie elektrisches Anzündelement und Ladung sowie Trennkolben sind den jeweiligen Bedürfnissen kundenspezifisch anzufertigen, was kostenintensiv ist. The assembly and construction of the known pyrotechnic Securing elements is quite complex and the pyrotechnic Elements such as electrical igniter and Charge and separating pistons are the respective needs custom-made, which is expensive.

Der Erfindung liegt die Aufgabe zugrunde, ein pyrotechnisches Wirkelement mit einer reduzierten Anzahl von bei der Montage getrennt zu verbauende Bauteile zu schaffen.The invention has for its object a pyrotechnic Active element with a reduced number of components to be installed separately during assembly create.

Zur Lösung dieser Aufgabe wird erfindungsgemäß ein pyrotechnisches Wirkelement mit den Merkmalen von Patentanspruch 1 vorgeschlagen.According to the invention, a pyrotechnic is used to achieve this object Active element with the features of claim 1 proposed.

Das erfindungsgemäße Wirkelement weist sozusagen als Träger für die pyrotechnische Ladung das elektrische Anzündelement sowie zum Halten der Anschlußkontakte des Anzündelements ein Sockelelement auf, mit dem das Trennelement verbunden ist. Diese Verbindung ist feuchtigkeitsdicht und insbesondere gasdicht, so daß beim Lagern des pyrotechnischen Wirkelements die pyrotechnische Ladung nicht durch Einwirkungen von außen (Eindringen von Feuchtigkeit) funktionsuntüchtig wird. Die mechanische Verbindung von Sockelelement und Trennelement ist einerseits derart mechanisch fest, daß sich beide Teile bei der Handhabung und insbesondere bei der Montage in einer übergeordneten Einheit (z. B. Einbau in das Gehäuse eines elektrischen Sicherungselements) nicht unbeabsichtigt voneinander lösen. Auf der anderen Seite muß sich die Verbindung von Sockelelement und Trennelement dann, wenn die pyrotechnische Ladung bestimmungsgemäß zündet, zuverlässig lösen, ohne daß dazu eine nennenswerte Kraft erforderlich ist, so daß die gesamte bei Zündung der pyrotechnischen Ladung freiwerdende Energie in kinetische Energie des Trennelements umgesetzt wird.The active element according to the invention has, so to speak Carrier for the pyrotechnic charge the electrical Ignition element and to hold the contacts of the Ignition element on a base element with which the separating element connected is. This connection is moisture-tight and in particular gastight, so that when storing the pyrotechnic active element, the pyrotechnic charge not through external influences (intrusion of Moisture) becomes inoperable. The mechanical Connection of base element and separating element is on the one hand so mechanically firm that both parts at Handling and especially when assembling in a parent Unit (e.g. installation in the housing of a electrical fuse element) not inadvertently from each other to solve. On the other hand, the connection must be of base element and separating element when the pyrotechnic charge ignites properly, reliably solve without the need for a significant force is so that the entire when the pyrotechnic ignition Charge released energy in kinetic energy of the Separating element is implemented.

Dadurch, daß es sich bei dem erfindungsgemäßen Wirkelement um ein in sich abgeschlossenes Bauteil handelt, kann ein einmal gezündetes Wirkelement aus seiner übergeordneten Einheit ausgebaut und gegen ein neues Wirkelement ausgetauscht werden.The fact that it is in the active element according to the invention can be a self-contained component once ignited active element from its parent Unit removed and replaced with a new active element become.

Das erfindungsgemäße pyrotechnische Wirkelement ist allgemein in übergeordneten Einheiten einzusetzen, bei denen es darum geht, ein Medium (z. B. einen elektrischen Leiter) oder ein strömendes Fluid (Flüssigkeits- oder Gasstrom oder viskose Stoffe) zu durchtrennen bzw. zu unterbrechen. Je nach den Eigenschaften und Einsatzbereichen des Medium bzw. Fluids ist das Trennwerkzeug des Trennelements aus einem geeigneten Material (z. B. Metall, Keramik, Kunststoff) ausgebildet. Im Falle der Verwendung des erfindungsgemäßen Wirkelements in einem elektrischen Sicherungselement besteht das Trennwerkzeug aus einem nicht leitenden Material, vorzugsweise Kunststoff, wobei hier insbesondere Materialien der Rohstoffgruppen Polyamid, Polycarbonat, Polyphenylensulfid oder dergleichen mit mineralischen, organischen oder anorganischen Füllstoffen zu nennen sind.The pyrotechnic active element according to the invention is generally used in higher-level units at who are concerned with a medium (e.g. an electrical Conductor) or a flowing fluid (liquid or Gas flow or viscous substances) to cut or to interrupt. Depending on the properties and areas of application of the medium or fluid is the separation tool of the Separating element made of a suitable material (e.g. metal, Ceramic, plastic). In case of use of the active element according to the invention in an electrical The separating tool consists of a securing element non-conductive material, preferably plastic, wherein here in particular materials from the raw material groups Polyamide, polycarbonate, polyphenylene sulfide or the like with mineral, organic or inorganic fillers are to be mentioned.

In vorteilhafter Weiterbildung der Erfindung ist vorgesehen, daß die lösbare Verbindung zwischen dem Sockelelement und dem Trennelement bis zu einer Mindestfestigkeit stoffschlüssig, reibschlüssig und/oder formschlüssig ist, was insbesondere durch eine Verklebung, (Ultraschall-)Verschweißung, Verstemmung, Vernockung oder Verrastung erfolgen kann. In an advantageous development of the invention, that the releasable connection between the base element and the separating element up to a minimum strength cohesive, frictional and / or positive is what in particular by gluing, (Ultrasonic) welding, caulking, blockage or Can be locked.

Die Verbindung zwischen dem Trennelement und dem Sockelelement ist vorzugsweise mit Sollbruchstellen versehen, die bei Explosion der pyrotechnischen Ladung aufbrechen und das Trennelement freigeben. Das Trennelement des erfindungsgemäßen Wirkelements weist das Trennwerkzeug und ein dieses haltendes Halteelement auf, das vorzugsweise einstückig mit dem Trennwerkzeug ausgebildet ist.The connection between the separating element and the base element is preferably provided with predetermined breaking points, that break open when the pyrotechnic charge explodes and release the separator. The separator of the Active element according to the invention has the separating tool and a holding element holding this, preferably is integrally formed with the separating tool.

In vorteilhafter Weiterbildung der Erfindung ist zur Realisierung der Dichtigkeit der Anlage des Trennelement und des Sockelelements mindestens ein O-Ring vorgesehen. Dieser Dichtungsring ist vorzugsweise in einer Umfangsnut des Sockelelements oder des Trennelements angeordnet und liegt in seinem über die Umfangsnut überstehenden Bereich an dem jeweils anderen Element dicht an. Das Halteelement des Trennelements (oder alternativ das Sockelelement) weist vorzugsweise einen abstehenden Umgreifkragen auf, der das Sockelelement (oder alternativ das Halteelement) umschließt.In an advantageous development of the invention Realization of the tightness of the system of the separating element and the base element is provided at least one O-ring. This sealing ring is preferably in a circumferential groove arranged of the base element or the separating element and lies in its area projecting beyond the circumferential groove close to the other element. The holding element the separating element (or alternatively the base element) preferably has a protruding wrap-around collar, which the base element (or alternatively the holding element) encloses.

Nachfolgend werden anhand der Zeichnung bevorzugte Ausführungsbeispiele der Erfindung näher erläutert. Im einzelnen zeigen:

Fign. 1 und 2
eine Seitenansicht auf und einen Längsschnitt durch ein pyrotechnisches Wirkelement gemäß einem ersten Ausführungsbeispiel
Fign. 3 und 4
eine Seitenansicht auf und einen Längsschnitt durch ein pyrotechnisches Wirkelement gemäß einem zweiten Ausführungsbeispiel und
Fign. 5 und 6
eine Seitenansicht auf und einen Längsschnitt durch ein pyrotechnisches Wirkelement gemäß einem dritten Ausführungsbeispiel.
Preferred exemplary embodiments of the invention are explained in more detail below with reference to the drawing. In detail show:
FIGS. 1 and 2
a side view of and a longitudinal section through a pyrotechnic active element according to a first embodiment
FIGS. 3 and 4
a side view of and a longitudinal section through a pyrotechnic active element according to a second embodiment and
FIGS. 5 and 6
a side view and a longitudinal section through a pyrotechnic active element according to a third embodiment.

Die Fign. 1 und 2 zeigen eine Seitenansicht auf und einen Längsschnitt durch ein pyrotechnisches Wirkelement 10, das ein Sockelelement 12 und ein Trennelement 14 aufweist, die bei 16 punktweise untereinander verschweißt sind. Beide Teile des Wirkelements 10 bestehen aus dem gleichen Kunststoffmaterial und lassen sich somit ultraschallverschweißen. Das Sockelelement ist rotationssymmetrisch und insbesondere mit zylindrischen Einzelabschnitten versehen. In seinem in axialer Erstreckung betrachtet mittleren Abschnitt weist das Sockelelement einen Bund 18 auf, von dem aus sich beidseitig Ansätze 20,22 erstrecken, die im Außendurchmesser kleiner sind als der Bund 18. An dem stirnseitigen Ende 24 des einen Ansatzes 20 befindet sich ein elektrisches Anzündelement 26 und eine pyrotechnische Ladung 28, während aus dem stirnseitigen Ende 30 des anderen Ansatzes 22 zwei elektrisch mit dem Anzündelement 26 verbundene Anschlußstifte 32 ragen.The figures 1 and 2 show a side view of FIG Longitudinal section through a pyrotechnic active element 10, the has a base element 12 and a separating element 14 which are welded to one another at 16 points. Both Parts of the active element 10 consist of the same plastic material and can therefore be ultrasonically welded. The base element is rotationally symmetrical and in particular provided with cylindrical individual sections. Viewed in its axial extent In the middle section, the base element has a collar 18 from which extensions 20, 22 extend on both sides, which are smaller in diameter than the collar 18. An the front end 24 of an approach 20 is located an electrical igniter 26 and a pyrotechnic Charge 28 while from the front End 30 of the other approach 22 two electrically with the Ignition element 26 connected pins 32 protrude.

Das Trennelement 14 weist ein zylindrisches Halteelement 34 auf, das mit einem axial abstehenden Umgreifkragen 36 versehen ist, der den das Anzündelement 26 und die pyrotechnische Ladung 28 tragenden Ansatz 20 des Sockelelements 12 von außen umschließt und an dem Bund 18 des Sockelelements 12 anliegt, mit dem es punktförmig verschweißt ist. Hierzu weist der Umgreifkragen 36 mehrere axiale Vorsprünge 38 auf, die mit dem Bund 18 des Sockelelements bei 16 verschweißt sind. Auf der dem Umgreifkragen abgewandten Seite trägt das Halteelement 34 des Trennelements 14 ein Trennwerkzeug 40, das sich entlang des Durchmesser des Halteelements 34 erstreckt und von diesem axial absteht. Das Trennwerkzeug 40 ist nach Art einer Schneide ausgebildet und ist einstückig mit dem Halteelement 34 verbunden.The separating element 14 has a cylindrical holding element 34 on that with an axially projecting collar 36 is provided which the igniter 26 and the approach 20 carrying pyrotechnic charge 28 of the Surrounds base element 12 from the outside and on the collar 18th of the base element 12 rests with which it is welded in a punctiform manner is. For this purpose, the encircling collar 36 has several axial projections 38 on the collar 18 of the base member are welded at 16. On the wrap-around collar facing away from the support member 34 of the Separating element 14 is a separating tool 40 that extends along of the diameter of the holding element 34 extends from protrudes axially. The cutting tool 40 is according to Art a cutting edge and is integral with the Holding element 34 connected.

Der Außendurchmesser des Umgreifkragens 36 ist in etwa gleich dem Außendurchmesser des Bundes 18 des Sockelelements 12 gewählt, während seine Dicke in etwa gleich der Durchmesserdifferenz des Bundes 18 und des vom Umgreifkragen 36 umschlossenen Ansatzes 20 des Sockelelements 12 ist.The outer diameter of the encircling collar 36 is approximately equal to the outer diameter of the collar 18 of the base element 12 chosen while its thickness is approximately the same the diameter difference of the collar 18 and the from Wrapping collar 36 enclosed approach 20 of the base element 12 is.

Für die Handhabung und den Einbau des Wirkelements 10 weist die punktförmige Schweißverbindung zwischen dem Sockelelement 12 und dem Trennelement 14 eine ausreichende Festigkeit auf. Dagegen löst sich die Verbindung zuverlässig selbsttätig, wenn die pyrotechnische Ladung 28 zündet, so daß das Sockelelement 12 das Trennelement 14 freigibt.For handling and installing the active element 10 points the spot weld between the Base element 12 and the separating element 14 a sufficient Firmness on. In contrast, the connection is broken reliably automatic when the pyrotechnic charge 28 ignites so that the base element 12, the separating element 14th releases.

Um den sich zwischen dem stirnseitigen Ende 24 des das Anzündelement 26 und die pyrotechnische Ladung 28 tragenden Ansatzes 20 des Sockelelements 12 und dem Halteelement 34 des Trennelements 14 bildenden Hohlraum 42 vor dem Eindringen von Feuchtigkeit zu schützen, ist ein umlaufender Dichtungsring 44 vorgesehen, der in gegenüberliegenden Umfangsausnehmungen 46 und 48 an der Außenseite des Ansatzes 20 und der Innenseite des Kragens 36 angeordnet ist.To the between the front end 24 of the Ignition element 26 and the pyrotechnic charge 28 load-bearing approach 20 of the base member 12 and the holding member 34 of the separating element 14 forming cavity 42 Protecting the ingress of moisture is a circumferential sealing ring 44 is provided, which in opposite Circumferential recesses 46 and 48 on the outside of the neck 20 and the inside of the collar 36 is arranged.

Das Wirkelement 10 wird z. B. in einem elektrischen Sicherungselement, wie es in DE 42 11 079 beschrieben ist, eingesetzt. Für die Montage ist es dabei von Vorteil, daß das Anzündelement 26, die pyrotechnische Ladung 28 und das Sockel- sowie das Trennelement 12 bzw. 14 als vorgefertigte Einheit eingebaut werden können. The active element 10 is, for. B. in an electrical Securing element, as described in DE 42 11 079, used. For assembly, it is advantageous that the igniter 26, the pyrotechnic charge 28 and the Base and the separating element 12 or 14 as prefabricated Unit can be installed.

Die in den Fign. 3 bis 6 dargestellten beiden weiteren Ausführungsbeispiele des pyrotechnischen Wirkelements 10' und 10" entsprechen in ihrem Aufbau weitestgehend dem pyrotechnischen Wirkelement 10 gemäß den Fign. 1 und 2. Insoweit sind in den Fign. 3 bis 6 die gleichen Bezugszeichen für gleiche bzw. funktionsgleiche Teile benutzt.The in Figs. 3 to 6 shown two more Embodiments of the pyrotechnic active element 10 ' and 10 "correspond largely to their structure pyrotechnic active element 10 according to FIGS. 1 and 2. To this extent, in the FIGS. 3 to 6 the same reference numerals used for identical or functionally identical parts.

Der Unterschied des Wirkelements 10' gegenüber dem Wirkelement 10 besteht in der Art der mechanischen Verbindung des Trennelements 14 mit dem Sockelelement 12. Bei dem Ausführungsbeispiel gemäß den Fign. 3 und 4 weist der Ansatz 20 des Sockelelements nämlich in seinem Übergangsbereich zum Bund 18 eine umlaufende Einschnürung 50 auf, in die das freie Ende des Umgreifkragens 36 durch plastische Verformung hineintaucht. Hierdurch kommt es zu einer mechanischen Verbindung mit für die Montage und die Handhabung des Wirkelements 10' ausreichender Festigkeit.The difference of the active element 10 'compared to that Active element 10 consists in the type of mechanical connection of the separating element 14 with the base element 12. At the embodiment according to FIGS. 3 and 4 has the Approach 20 of the base element namely in its transition area a circumferential constriction 50 to the collar 18, into which the free end of the collar 36 through plastic deformation plunges into it. This is what happens a mechanical connection with for assembly and the Handling the active element 10 'sufficient strength.

Bei dem Ausführungsbeispiel gemäß den Fign. 5 und 6 erfolgt die mechanische Verbindung zwischen dem Sockelelement 12 und dem Trennelement 14 durch eine mechanische Verrastung, wobei vom Bund 18 des Sockelelements 12 Rastelemente 52 axial abstehen, die in korrespondierende Rastausnehmungen 54 am freien Ende des Umgreifkragens 36 des Halteelements 34 des Trennelements 14 eingreifen.In the embodiment according to FIGS. 5 and 6 there is the mechanical connection between the base element 12 and the separating element 14 by a mechanical Latching, with the collar 18 of the base element 12 Project locking elements 52 axially, which in corresponding Locking recesses 54 at the free end of the encircling collar 36 of the holding element 34 of the separating element 14 engage.

Claims (4)

  1. Pyrotechnic active element for severing media and/or fluids, having
    a base element (12),
    an electrical ignition element (26) which is arranged on or in the base element (12),
    a pyrotechnic charge (28) which can be ignited by the ignition element (26),
    with a holding element (34) being connected in a sealed manner to the base element (12) and this connection being detachable upon ignition of the pyrotechnic charge (28), characterised in that
    the holding element (34) has a protruding encompassing collar (36) for laterally encompassing at least part of the base element (12), and
    the base element (12) has, in the region of its portion which is surrounded by the encompassing collar (36) of the holding element (34), a circumferential groove (46, 48) having a sealing ring (44) arranged therein, and
    a severing element (14) has a severing tool (40) and the holding element (34) holding the latter, and
    the holding element (34) and the severing tool (40) are connected to each other in one piece.
  2. Active element according to claim 1, characterised in that the base element (12) and the holding element (34) are connected to each other in a material-locking, friction-locking and/or form-locking manner.
  3. Active element according to claim 1 or 2, characterised in that the base element (12) and the holding element (34) are glued, welded, connected by cams, caulked or locked together.
  4. Active element according to one of claims 1 to 3, characterised in that the connection between the base element (12) and the holding element (34) has predetermined breaking points.
EP98937540A 1997-07-04 1998-06-23 Pyrotechnic active element Expired - Lifetime EP0993678B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19728658A DE19728658A1 (en) 1997-07-04 1997-07-04 Pyrotechnic active element
DE19728658 1997-07-04
PCT/EP1998/003838 WO1999001880A1 (en) 1997-07-04 1998-06-23 Pyrotechnic active element

Publications (2)

Publication Number Publication Date
EP0993678A1 EP0993678A1 (en) 2000-04-19
EP0993678B1 true EP0993678B1 (en) 2003-03-05

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EP98937540A Expired - Lifetime EP0993678B1 (en) 1997-07-04 1998-06-23 Pyrotechnic active element

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US (1) US6496098B1 (en)
EP (1) EP0993678B1 (en)
CZ (1) CZ297976B6 (en)
DE (2) DE19728658A1 (en)
WO (1) WO1999001880A1 (en)

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CZ442899A3 (en) 2000-04-12
CZ297976B6 (en) 2007-05-09
DE19728658A1 (en) 1999-01-07
WO1999001880A1 (en) 1999-01-14
US6496098B1 (en) 2002-12-17
EP0993678A1 (en) 2000-04-19
DE59807398D1 (en) 2003-04-10

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