EP1994289B1 - Pyrotechnic actuator - Google Patents

Pyrotechnic actuator Download PDF

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Publication number
EP1994289B1
EP1994289B1 EP07711670A EP07711670A EP1994289B1 EP 1994289 B1 EP1994289 B1 EP 1994289B1 EP 07711670 A EP07711670 A EP 07711670A EP 07711670 A EP07711670 A EP 07711670A EP 1994289 B1 EP1994289 B1 EP 1994289B1
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EP
European Patent Office
Prior art keywords
piston
housing
piston rod
detonator
cavity
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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.)
Not-in-force
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EP07711670A
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German (de)
French (fr)
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EP1994289A1 (en
Inventor
Markus Ermert
Ralf Grohn
Rolf Bender
Wolfgang Hamm
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Thomas Magnete GmbH
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Thomas Magnete GmbH
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Publication of EP1994289A1 publication Critical patent/EP1994289A1/en
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Publication of EP1994289B1 publication Critical patent/EP1994289B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/19—Pyrotechnical actuators

Definitions

  • the invention relates to a pyrotechnic actuator according to the preamble of claim 1
  • Such an actuator is for example in the DE 102 03 710 C1 described.
  • a compact design is desired and on the other hand a high level of functional reliability is required.
  • Such actuators are used, for example, to trigger airbags, belt tensioners, roll bars or the like in motor vehicle technology.
  • actuators will also be used to actuate other safety devices, in particular for personal protection, namely to lift the hood in the event of a person impacting the hood of a motor vehicle in order to dampen the effects of the impact on the person at least some personal protection is achieved.
  • a pyrotechnic actuator by triggering the igniter, which is located on the piston rod opposite end of the housing, the piston and piston rod displaced to a position in which the piston rod or the element located thereon on the safety device or the corresponding Pressing element of the safety device acts.
  • the arrangement of the igniter is mandatory from the constructively predetermined installation situations to be such that it is arranged on the side facing away from the piston rod of the pyrotechnic actuator; so that appropriate installations, lines and the like do not have to be installed in the area where the piston rod exits the housing.
  • US-A-4 054 032 is a generic pyrotechnic actuator known.
  • US-A-4 037 821 such a pyrotechnic actuator is previously known.
  • the present invention seeks to provide a pyrotechnic actuator, which can be realized by implementing the conventional construction principle as a pulling pyrotechnic actuator, with the actuator, a simultaneous or time-offset adjustment of two actuators is enabled.
  • a pulling pyrotechnic actuator which has a relation to the housing projecting positioning of the piston rod in the initial position and in the end position, the piston rod is displaced in the direction of the housing, so that the piston rod is pulled pulling.
  • This second actuator for example, in a release of the igniter and in accordance with retracted piston / piston rod unit by means of the pressurized gas of the igniter against the retraction movement of the piston rod are pre-displaced to trigger more functions. It is thus realized a double-acting actuator, the pulling and pushing works.
  • the means are formed by channels which connect a detonator receiving chamber with a chamber, of which at least one wall portion is formed by the surface of the piston from which the piston rod protrudes.
  • a preferred first embodiment is proposed, which is characterized in that the igniter is inserted into an opening of the housing bottom, which faces away from the housing side, which is tangible by the piston rod, wherein the housing as a solid body with formed therein cavity for receiving the Piston is formed and the housing body has channels or holes which connect the gas outlet of the igniter with the housing bottom facing away from the surface of the piston.
  • the development may be that the igniter is inserted into an opening at the bottom of the piston, which faces away from the piston side, projects from the piston rod, the piston having channels or holes which connect the gas outlet of the igniter with the piston surface, which faces away from the floor and protrudes from the piston rod.
  • the channels or bores are provided in the housing designed as a solid body, while in the second development the channels are provided in the piston designed as a solid part.
  • the channels or holes open into a region of the cavity, which is in the initial position of the piston above the surface of the piston from which the piston rod protrudes.
  • the channels or holes open into a region of the cavity, which is in the initial position of the piston below the surface of the piston from which protrudes the piston rod.
  • the second actuator is designed as a cup-shaped sleeve, which is pushed onto the housing and the bottom of which is penetrated by the piston rod sealed.
  • the second actuator has outwardly projecting functional surfaces, by means of which, when the actuator is displaced relative to the housing, a process can be triggered.
  • Such functional aids can be supported on components or functional elements that can be moved accordingly upon actuation of the igniter. It can be provided that the functional surfaces are formed by an outwardly projecting flange edge of the cup-like sleeve.
  • FIG. 1 a first embodiment of a pyrotechnic actuator is shown as a pulling actuator.
  • the actuator has a housing 1 , in which a piston 2 is mounted vertically displaceable in the drawing.
  • the housing 1 has a cavity 3 , in which the piston 2 is displaceable in the direction of the movement arrow 4 , wherein the piston 2 is peripherally sealed by a seal 5 against the inner surface of the cavity 3 .
  • a protechnischer igniter 6 is arranged, the gas outlet is in communication with the cavity 3 , so that the piston 2 by a released at the ignition of the igniter 6 amount of gas from the in FIG. 1 shown starting position is movable into an end position.
  • a connected to the piston 2 piston rod 7 passes through an opening of the housing 1 sealed.
  • the piston rod 7 initiates a process, unlocks, for example, a safety device.
  • the piston rod 7 is in the starting position according to FIG. 1 arranged protruding from the housing 1 above. In the final position is moved the piston 2 in the drawing Figure 1 down and also displaces the piston rod 7 downwards.
  • means are provided, by means of which the gas quantity released upon ignition of the igniter 6 is directed to the side of the piston 2 and acts on the side of the piston from which the piston rod 7 protrudes.
  • These means are formed by channels 8 which connect a chamber 6 receiving the igniter to a chamber 9 , of which at least one wall part is formed by the surface of the piston 2 from which the piston rod 7 protrudes.
  • the igniter 6 is inserted into an opening of the housing bottom, which faces away from the housing side, which can be reached by the piston rod 7 .
  • the housing 1 is designed as a solid body, for example of two half-shells, with cavity 3 formed therein for receiving the piston 2, the housing body having the channels 8 or bores connecting the gas outlet of the igniter 6 with the surface of the piston 2 facing away from the housing bottom ,
  • the connection formed, for example, as a plug connection for the igniter 6 is thus provided on the side facing away from the piston rod 7 housing side.
  • the housing 1 is surrounded by a cup-shaped sleeve 10 , the bottom of which is penetrated by the piston rod 7 .
  • a flange plate 11 closes the mouth of the cup-like sleeve 10 facing away from the same. Is thus closed, the housing 1 or the cup-shaped sleeve 10 by caulking, welding or other types of connection of the flange 11 with the housing 1 and / or the cup-shaped sleeve 10th
  • the flange 11 may also penetrate the wall of the cup-shaped sleeve 10 and then caulked.
  • This outer cup-shaped sleeve 10 forms a protection for the intended Use of the actuator and in particular this serves to ensure that the unit is exempted from explosives law.
  • a fixed housing stop 12 is formed, which represents a Wegbegrenzungsanschlag for the path of the piston 2 .
  • a return spring 13 is provided in the form of a helical compression spring, so that optionally the piston 2 can be returned to the initial position after triggering. The arrangement of such a return spring can also be provided elsewhere.
  • the housing 1 ' is formed as a cup-shaped sleeve, wherein in the cavity of the piston 2' according to the movement arrow 4 'is slidably disposed.
  • the inner wall of the housing 1 ' has a seal 5' , so that a seal against the piston 2 ' takes place.
  • the piston 2 ' may be formed as a one-piece solid element.
  • the piston 2 ' is formed by two half-elements, which are arranged within a further pot-like housing and fixedly connected thereto. The unit is held by a flange 15, which is caulked to the element 14 or firmly connected in any other suitable manner.
  • piston rod 7' From the piston 2 ' protrudes upward from a piston rod 7' , which passes through the housing 1 ' sealed. It is for this purpose a seal 16 is provided.
  • the piston 2 ' is displaced from an initial position to an end position upon ignition of the igniter 6' connected to the piston by the gas quantity then released.
  • the piston rod 7 ' triggers a process during the process in the end position or in the end position.
  • the piston rod 7 ' in the starting position according to FIG. 2 arranged on the housing 1 ' upwardly projecting, while displaced in the end position downwardly partially displaced back into the housing.
  • means are again provided to guide the gas quantity released when the igniter 6 'is ignited to the side of the piston 2' from which the piston rod 7 ' protrudes.
  • These means are formed by channels 8 ' which connect a detonator 6' receiving chamber of the piston 2 ' with a chamber 9' , of which at least one wall part by the surface of the piston 2 'is formed, from which the piston rod 7' protrudes ,
  • the igniter 6 ' is inserted into an opening at the bottom of the piston 2' or the flange 15 , which faces away from the piston side, from which the piston rod 7 ' protrudes.
  • the piston 2 ' in this case has the channels 8' or holes which connect the gas outlet of the igniter 6 ' with the piston surface from which the piston rod 7' protrudes.
  • a second actuator 17 is arranged displaceably parallel to the direction of the piston and sealed against the jacket of the housing.
  • a seal 18 is provided between the outer jacket of the cup-shaped sleeve 10 and the inner jacket of the second actuator 17 .
  • a sealed chamber 20 is formed between a wall 19 of the second actuator 17 and the attacked by the piston rod 7 wall of the housing 1 and 10 .
  • the seal is made via the seals 18 and 21.
  • This chamber 20 is connected via channels 22 or holes with the cavity 3 , in which the piston 2 is slidably disposed.
  • the second actuator 17 is formed as a cup-shaped sleeve which is pushed onto the housing 1 or the cup-shaped sleeve 10 ' and whose bottom is penetrated by the piston rod 7 sealed.
  • the second actuator 17 outwardly projecting functional surfaces 23 , by means of which when moving the second actuator 17 relative to the housing 1 or 10, a process can be triggered, so certain with the functional surfaces 23 coupled elements are actuated.
  • the functional surfaces 23 are formed by an outwardly projecting flange edge of the second actuator designed as a cup-shaped sleeve.
  • the movement of the piston 2 in the end position can be damped in order to reduce excess kinetic energy. This can be done by one or more deformation elements, which lie in the direction of movement of the piston.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Actuator (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

The invention relates to a pyrotechnic actuator comprising a housing (1), which has a cavity (3), in which a piston (2) is displaceably mounted. The actuator is equipped with a pyrotechnic igniter (6), whose gas outlet is connected to the cavity (3), in such a way that the piston (2) can be displaced from an initial position, the idle position, into a final position, the working position by a quantity of gas that is released during the ignition of the igniter (6). A piston rod (7) that is connected to the piston (2) penetrates the opening of the housing (1), is sealed in relation to the latter and during the travel of the piston (2) from its initial position to its final position or when said piston is in the final position, triggers an event. The invention is characterised in that the piston rod (7) protrudes from the housing (1) in its initial position and is partially or fully retracted in the housing (1) in its final position, and that means are provided for conducting the quantity of gas that is released during ignition of the igniter (6) at one side of the piston (2), said gas being applied to the side of the piston (2), from which the piston rod (7) protrudes.

Description

Die Erfindung betrifft einen pyrotechnischen Aktor gemäß dem Oberbegriff des Anspruches 1The invention relates to a pyrotechnic actuator according to the preamble of claim 1

Ein solcher Aktor ist beispielsweise in der DE 102 03 710 C1 beschrieben. Bei den herkömmlichen Aktoren dieser Art ist einerseits eine kompakte Bauform erwünscht und andererseits eine hohe Funktionssicherheit erforderlich. Solche Aktoren werden beispielsweise eingesetzt, um in der Kfz- Technik Airbags, Gurtstraffer, Überrollbügel oder dergleichen auszulösen.Such an actuator is for example in the DE 102 03 710 C1 described. In the conventional actuators of this type, on the one hand a compact design is desired and on the other hand a high level of functional reliability is required. Such actuators are used, for example, to trigger airbags, belt tensioners, roll bars or the like in motor vehicle technology.

In jüngerer Zeit ist vorgesehen, dass solche Aktoren auch zur Auslösung anderer Sicherheitseinrichtungen, insbesondere zum Personenschutz genutzt werden, um nämlich bei einem Aufprall einer Person auf die Haube eines Kraftfahrzeuges die Haube hochzustellen, um die Wirkungen des Aufpralls für die Person derart zu dämpfen, dass zumindest ein gewisser Personenschutz erreicht wird. Bei den herkömmlichen Bauarten wird bei einem solchen pyrotechnischen Aktor durch Auslösung des Zünders, der sich am der Kolbenstange entgegengesetzten Ende des Gehäuses befindet, der Kolben samt Kolbenstange in eine Position verlagert, in der die Kolbenstange beziehungsweise das daran befindliche Element auf die Sicherheitseinrichtung oder das entsprechende Element der Sicherheitseinrichtung drückend einwirkt. Die Anordnung des Zünders ist aus der konstruktiv vorgegebenen Einbausituationen zwingend so vorzunehmen, dass er auf der der Kolbenstange abgewandten Seite des pyrotechnischen Aktors angeordnet ist; so dass entsprechende Installationen, Leitungen und dergleichen nicht in dem Bereich verlegt werden müssen, an der die Kolbenstange aus dem Gehäuse austritt. Aus der US-A-4 054 032 ist ein gattungsgemäßer pyrotechnischer Aktor bekannt. Des Weiteren ist aus der US-A- 4 037 821 ein solcher pyrotechnischer Aktor vorbekannt.More recently, it is envisaged that such actuators will also be used to actuate other safety devices, in particular for personal protection, namely to lift the hood in the event of a person impacting the hood of a motor vehicle in order to dampen the effects of the impact on the person at least some personal protection is achieved. In the conventional types of such a pyrotechnic actuator by triggering the igniter, which is located on the piston rod opposite end of the housing, the piston and piston rod displaced to a position in which the piston rod or the element located thereon on the safety device or the corresponding Pressing element of the safety device acts. The arrangement of the igniter is mandatory from the constructively predetermined installation situations to be such that it is arranged on the side facing away from the piston rod of the pyrotechnic actuator; so that appropriate installations, lines and the like do not have to be installed in the area where the piston rod exits the housing. From the US-A-4 054 032 is a generic pyrotechnic actuator known. Furthermore, from the US-A-4 037 821 such a pyrotechnic actuator is previously known.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen pyrotechnischen Aktor zu schaffen, der unter Verwirklichung des herkömmlichen Bauprinzips als ziehender pyrotechnischer Aktor realisiert werden kann, wobei mit dem Aktor eine gleichzeitige oder zeitlich versetzte Verstellung von zwei Stellgliedern ermöglicht ist.Based on this prior art, the present invention seeks to provide a pyrotechnic actuator, which can be realized by implementing the conventional construction principle as a pulling pyrotechnic actuator, with the actuator, a simultaneous or time-offset adjustment of two actuators is enabled.

Die Lösung dieser Aufgabe erfolgt durch die konstruktiven Merkmale gemäß Anspruch 1.The solution of this object is achieved by the structural features according to claim 1.

Bei dieser Anordnung ist ein ziehender pyrotechnischer Aktor realisiert, der in der Ausgangslage eine gegenüber dem Gehäuse vorragende Positionierung der Kolbenstange hat und in der Endlage die Kolbenstange in Richtung auf das Gehäuse verschoben ist, so dass die Kolbenstange ziehend beaufschlagt ist. Weiter wird durch diese Ausbildung erreicht, dass bei Verstellung des Kolbens, gleichzeitig oder zeitlich versetzt, eine Verstellung des zweiten Stellgliedes erfolgt. Dieses zweite Stellglied kann beispielsweise bei einer Auslösung des Zünders und bei entsprechend zurückgezogener Kolben- /Kolbenstangeneinheit mittels des Druckgases des Zünders entgegen der Zurückzugsbewegung der Kolbenstange vorverlagert werden, um weitere Funktionen auszulösen. Es wird damit ein doppelt wirkender Aktor realisiert, der ziehend und drückend arbeitet.In this arrangement, a pulling pyrotechnic actuator is realized, which has a relation to the housing projecting positioning of the piston rod in the initial position and in the end position, the piston rod is displaced in the direction of the housing, so that the piston rod is pulled pulling. Next is achieved by this design that, upon adjustment of the piston, simultaneously or offset in time, an adjustment of the second actuator takes place. This second actuator, for example, in a release of the igniter and in accordance with retracted piston / piston rod unit by means of the pressurized gas of the igniter against the retraction movement of the piston rod are pre-displaced to trigger more functions. It is thus realized a double-acting actuator, the pulling and pushing works.

Bevorzugt ist hierbei vorgesehen, dass die Mittel durch Kanäle gebildet sind, die eine den Zünder aufnehmende Kammer mit einer Kammer verbinden, von der mindestens ein Wandteil durch die Fläche des Kolbens gebildet ist, von der die Kolbenstange abragt.Preferably, it is provided that the means are formed by channels which connect a detonator receiving chamber with a chamber, of which at least one wall portion is formed by the surface of the piston from which the piston rod protrudes.

In Weiterbildung wird eine bevorzugte erste Ausführungsform vorgeschlagen, die dadurch gekennzeichnet ist, dass der Zünder in eine Öffnung des Gehäusebodens eingesetzt ist, der der Gehäuseseite abgewandt ist, die von der Kolbenstange durchgreifbar ist, wobei das Gehäuse als Massivkörper mit darin ausgebildetem Hohlraum zur Aufnahme des Kolbens ausgebildet ist und der Gehäusekörper Kanäle oder Bohrungen aufweist, die den Gasauslass des Zünders mit der dem Gehäuseboden abgewandten Fläche des Kolbens verbinden.In a further development, a preferred first embodiment is proposed, which is characterized in that the igniter is inserted into an opening of the housing bottom, which faces away from the housing side, which is tangible by the piston rod, wherein the housing as a solid body with formed therein cavity for receiving the Piston is formed and the housing body has channels or holes which connect the gas outlet of the igniter with the housing bottom facing away from the surface of the piston.

Alternativ kann die Weiterbildung darin bestehen, dass der Zünder in eine Öffnung am Boden des Kolbens eingesetzt ist, der der Kolbenseite abgewandt ist, von der die Kolbenstange abragt, wobei der Kolben Kanäle oder Bohrungen aufweist, die den Gasauslass des Zünders mit der Kolbenfläche verbinden, die dem Boden abgewandt ist und von der die Kolbenstange abragt.Alternatively, the development may be that the igniter is inserted into an opening at the bottom of the piston, which faces away from the piston side, projects from the piston rod, the piston having channels or holes which connect the gas outlet of the igniter with the piston surface, which faces away from the floor and protrudes from the piston rod.

Bei der erstgenannten Weiterbildung sind die Kanäle oder Bohrungen in dem als Massivkörper ausgebildeten Gehäuse vorgesehen, während bei der zweiten Weiterbildung die Kanäle in dem als Massivteil ausgebildeten Kolben vorgesehen sind.In the former refinement, the channels or bores are provided in the housing designed as a solid body, while in the second development the channels are provided in the piston designed as a solid part.

Sofern eine gleichzeitige Bewegung des Kolbens samt Kolbenstange und des zweiten Stellgliedes nach Auslösung des Zünders erfolgen soll, ist vorgesehen, dass die Kanäle oder Bohrungen in einen Bereich des Hohlraumes einmünden, der in Ausgangslage des Kolbens oberhalb der Fläche des Kolbens liegt, von dem die Kolbenstange abragt.If a simultaneous movement of the piston together with the piston rod and the second actuator is to take place after triggering of the igniter, it is provided that the channels or holes open into a region of the cavity, which is in the initial position of the piston above the surface of the piston from which the piston rod protrudes.

Sofern die Verstellung des zweiten Stellgliedes erst dann erfolgen soll, wenn die Verstellung des Kolbens samt Kolbenstange teilweise oder auch vollständig vorgenommen ist, ist vorgesehen, dass die Kanäle oder Bohrungen in einen Bereich des Hohlraumes einmünden, der in Ausgangslage des Kolbens unterhalb der Fläche des Kolbens liegt, von der die Kolbenstange abragt.If the adjustment of the second actuator should take place only when the adjustment of the piston together with the piston rod is made partially or completely, it is provided that the channels or holes open into a region of the cavity, which is in the initial position of the piston below the surface of the piston from which protrudes the piston rod.

Bevorzugt kann zudem vorgesehen sein, dass das zweite Stellglied als topfartige Hülse ausgebildet ist, die auf das Gehäuse aufgeschoben ist und deren Boden von der Kolbenstange abgedichtet durchgriffen ist.Preference may also be provided that the second actuator is designed as a cup-shaped sleeve, which is pushed onto the housing and the bottom of which is penetrated by the piston rod sealed.

Besonders bevorzugt ist vorgesehen, dass das zweite Stellglied außen abragende Funktionsflächen aufweist, mittels derer bei Verschiebung des Stellgliedes relativ zum Gehäuse ein Vorgang auslösbar ist. Solche Funktionshilfen können sich an Bauteilen oder Funktionselementen abstützen, die bei Betätigung des Zünders entsprechend verschoben werden können. Dabei kann vorgesehen sein, dass die Funktionsflächen durch einen nach außen abragenden Flanschrand der topfartigen Hülse gebildet sind.It is particularly preferred that the second actuator has outwardly projecting functional surfaces, by means of which, when the actuator is displaced relative to the housing, a process can be triggered. Such functional aids can be supported on components or functional elements that can be moved accordingly upon actuation of the igniter. It can be provided that the functional surfaces are formed by an outwardly projecting flange edge of the cup-like sleeve.

Zudem kann in an sich bekannter Weise vorgesehen sein, dass die Verstellung des Kolbens und/oder des zweiten Stellgliedes mittels der vom Zünder freigegebenen Gasmenge entgegen der Kraft einer an Bestandteilen des Aktors abgestützten Rückstellfeder erfolgt.In addition, it can be provided in a conventional manner that the adjustment of the piston and / or the second actuator takes place by means of the released gas from the igniter counter to the force of a supported on components of the actuator return spring.

Auch kann in an sich bekannter Weise vorgesehen sein, dass in dem den Kolben aufnehmendem Hohlraum und/oder am Kolben Verformungsteile oder Bewegungsdämpfer angeordnet sind, die bei Bewegung des Kolbens in die Endlage die Bewegung des Kolbens abbremsen, vorzugsweise kurz vor Erreichen der Endlage.It can also be provided in a manner known per se, that in the piston receiving cavity and / or on the piston deformation parts or motion dampers are arranged which decelerate the movement of the piston upon movement of the piston in the end position, preferably shortly before reaching the end position.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und im Folgenden näher beschrieben.Embodiments of the invention are illustrated in the drawings and described in more detail below.

Es zeigt:

  • Figur 1 eine erste Ausführungsform eines pyrotechnischen Aktors im Mittel-Längsschnitt gesehen;
  • Figur 2 eine zweite Ausführungsform in gleicher Ansicht; Figur 3 eine dritte Ausführungsform in gleicher Ansicht in der Ausgangslage;
  • Figur 4 desgleichen in einer ersten Stufe des Bewegungsablaufes bei in Endlage befindlichem Aktor;
  • Figur 5 desgleichen bei zusätzlich verstellten Elementen des Aktors nach der Auslösung des Zünders;
  • Figur 6 eine Variante in der Position analog Figur 4 gesehen.
It shows:
  • FIG. 1 a first embodiment of a pyrotechnic actuator seen in the central longitudinal section;
  • FIG. 2 a second embodiment in the same view; FIG. 3 a third embodiment in the same view in the starting position;
  • FIG. 4 likewise in a first stage of the motion sequence with the actuator in the end position;
  • FIG. 5 likewise with additionally adjusted elements of the actuator after the triggering of the igniter;
  • FIG. 6 a variant in the position analog FIG. 4 seen.

In der Figur 1 ist eine erste Ausführungsform eines pyrotechnischen Aktors als ziehender Aktor gezeigt. Der Aktor weist ein Gehäuse 1 auf, in dem ein Kolben 2 in der Zeichnung vertikal verschiebbar gelagert ist. Dazu weist das Gehäuse 1 einen Hohlraum 3 auf, in welchem der Kolben 2 in Richtung des Bewegungspfeils 4 verschieblich ist, wobei der Kolben 2 umfangsseitig durch eine Dichtung 5 gegenüber dem Innenmantel des Hohlraumes 3 abgedichtet geführt ist.In the FIG. 1 a first embodiment of a pyrotechnic actuator is shown as a pulling actuator. The actuator has a housing 1 , in which a piston 2 is mounted vertically displaceable in the drawing. For this purpose, the housing 1 has a cavity 3 , in which the piston 2 is displaceable in the direction of the movement arrow 4 , wherein the piston 2 is peripherally sealed by a seal 5 against the inner surface of the cavity 3 .

Am in der Zeichnung unteren Ende der Baueinheit ist ein protechnischer Zünder 6 angeordnet, dessen Gasauslass mit dem Hohlraum 3 in Verbindung steht, so dass der Kolben 2 durch eine bei der Zündung des Zünders 6 frei werdende Gasmenge aus der in Figur 1 gezeigten Ausgangslage in eine Endlage bewegbar ist. Eine mit dem Kolben 2 verbundene Kolbenstange 7 durchgreift eine Öffnung des Gehäuses 1 abgedichtet. Auf dem Weg des Kolbens 2 aus der dargestellten Ausgangslage zu seiner Endlage oder in der Endlage löst die Kolbenstange 7 einen Vorgang aus, entsperrt beispielsweise eine Sicherheitseinrichtung.At the bottom of the unit in the drawing, a protechnischer igniter 6 is arranged, the gas outlet is in communication with the cavity 3 , so that the piston 2 by a released at the ignition of the igniter 6 amount of gas from the in FIG. 1 shown starting position is movable into an end position. A connected to the piston 2 piston rod 7 passes through an opening of the housing 1 sealed. On the way of the piston 2 from the illustrated starting position to its end position or in the end position, the piston rod 7 initiates a process, unlocks, for example, a safety device.

Die Kolbenstange 7 ist in der Ausgangslage gemäß Figur 1 aus dem Gehäuse 1 oben vorragend angeordnet. In der Endlage ist der Kolben 2 in der Zeichnungsfigur 1 nach unten verschoben und entsprechend auch die Kolbenstange 7 nach unten verlagert. Dabei sind Mittel vorgesehen, mittels derer die bei Zündung des Zünders 6 frei werdende Gasmenge zu der Seite des Kolbens 2 geleitet ist und die Seite des Kolbens beaufschlagt, von der die Kolbenstange 7 abragt. Diese Mittel sind durch Kanäle 8 gebildet, die eine den Zünder 6 aufnehmende Kammer mit einer Kammer 9 verbinden, von der mindestens ein Wandteil durch die Fläche des Kolbens 2 gebildet ist, von der die Kolbenstange 7 abragt. Der Zünder 6 ist dabei in eine Öffnung des Gehäusebodens eingesetzt, der der Gehäuseseite abgewandt ist, die von der Kolbenstange 7 durchgreifbar ist.The piston rod 7 is in the starting position according to FIG. 1 arranged protruding from the housing 1 above. In the final position is moved the piston 2 in the drawing Figure 1 down and also displaces the piston rod 7 downwards. In this case, means are provided, by means of which the gas quantity released upon ignition of the igniter 6 is directed to the side of the piston 2 and acts on the side of the piston from which the piston rod 7 protrudes. These means are formed by channels 8 which connect a chamber 6 receiving the igniter to a chamber 9 , of which at least one wall part is formed by the surface of the piston 2 from which the piston rod 7 protrudes. The igniter 6 is inserted into an opening of the housing bottom, which faces away from the housing side, which can be reached by the piston rod 7 .

Das Gehäuse 1 ist als Massivkörper, beispielsweise aus zwei Halbschalen, mit darin ausgebildetem Hohlraum 3 zur Aufnahme des Kolbens 2 ausgebildet, wobei der Gehäusekörper die Kanäle 8 oder Bohrungen aufweist, die den Gasauslass des Zünders 6 mit der dem Gehäuseboden abgewandten Fläche des Kolbens 2 verbinden. Der beispielsweise als Steckeranschluss ausgebildete Anschluss für den Zünder 6 ist also auf der der Kolbenstange 7 abgewandte Gehäuseseite vorgesehen. Im Ausführungsbeispiel ist das Gehäuse 1 von einer topfartigen Hülse 10 umgeben, deren Boden von der Kolbenstange 7 durchgriffen ist. Eine Flanschplatte 11 verschließt die dem Boden der topfartigen Hülse 10 abgewandte Mündung derselben. Verschlossen wird damit das Gehäuse 1 beziehungsweise auch die topfartige Hülse 10 durch Verstemmung, Verschweißung oder sonstige Verbindungsarten des Flansches 11 mit dem Gehäuse 1 und/oder der topfartigen Hülse 10. The housing 1 is designed as a solid body, for example of two half-shells, with cavity 3 formed therein for receiving the piston 2, the housing body having the channels 8 or bores connecting the gas outlet of the igniter 6 with the surface of the piston 2 facing away from the housing bottom , The connection formed, for example, as a plug connection for the igniter 6 is thus provided on the side facing away from the piston rod 7 housing side. In the exemplary embodiment, the housing 1 is surrounded by a cup-shaped sleeve 10 , the bottom of which is penetrated by the piston rod 7 . A flange plate 11 closes the mouth of the cup-like sleeve 10 facing away from the same. Is thus closed, the housing 1 or the cup-shaped sleeve 10 by caulking, welding or other types of connection of the flange 11 with the housing 1 and / or the cup-shaped sleeve 10th

Der Flansch 11 kann auch die Wandung der topfartige Hülse 10 durchdringen und anschließend verstemmt sein. Diese äußere topfartige Hülse 10 bildet einen Schutz für die bestimmungsgemäße Verwendung des Aktors und insbesondere dient diese dazu, dass die Baueinheit vom Sprengstoffrecht befreit ist.The flange 11 may also penetrate the wall of the cup-shaped sleeve 10 and then caulked. This outer cup-shaped sleeve 10 forms a protection for the intended Use of the actuator and in particular this serves to ensure that the unit is exempted from explosives law.

In dem Flansch 11 befindet sich insbesondere die Aufnahme für den Zünder 6. In der Hohlkammer 3 ist ein gehäusefester Anschlag 12 ausgebildet, der einen Wegbegrenzungsanschlag für den Weg des Kolbens 2 darstellt. Ferner ist in der Hohlkammer 3 eine Rückstellfeder 13 in Form einer Schraubendruckfeder vorgesehen, so dass gegebenenfalls der Kolben 2 nach der Auslösung wieder in die Grundstellung zurückgeführt werden kann. Die Anordnung einer solchen Rückstellfeder kann auch an anderer Stelle vorgesehen sein.In the flange 11 is in particular the receptacle for the igniter 6. In the hollow chamber 3 , a fixed housing stop 12 is formed, which represents a Wegbegrenzungsanschlag for the path of the piston 2 . Further, in the hollow chamber 3, a return spring 13 is provided in the form of a helical compression spring, so that optionally the piston 2 can be returned to the initial position after triggering. The arrangement of such a return spring can also be provided elsewhere.

Bei der Ausführungsform nach Figur 2 ist das Gehäuse 1' als topfartige Hülse ausgebildet, wobei in deren Hohlraum der Kolben 2' entsprechend dem Bewegungspfeil 4' verschieblich angeordnet ist. Die Innenwandung des Gehäuses 1' weist eine Dichtung 5' auf, so dass eine Abdichtung gegenüber dem Kolben 2' erfolgt. Der Kolben 2' kann als einstöckiges Massivelement ausgebildet sein. In der Ausführungsform ist der Kolben 2' durch zwei Halbelemente gebildet, die innerhalb eines weiteren topfartigen Gehäuses angeordnet und mit diesem fest verbunden sind. Gehalten wird die Einheit durch einen Flansch 15, der mit dem Element 14 verstemmt oder in sonstiger geeigneter Weise fest verbunden ist.In the embodiment according to FIG. 2 the housing 1 'is formed as a cup-shaped sleeve, wherein in the cavity of the piston 2' according to the movement arrow 4 'is slidably disposed. The inner wall of the housing 1 ' has a seal 5' , so that a seal against the piston 2 ' takes place. The piston 2 ' may be formed as a one-piece solid element. In the embodiment, the piston 2 'is formed by two half-elements, which are arranged within a further pot-like housing and fixedly connected thereto. The unit is held by a flange 15, which is caulked to the element 14 or firmly connected in any other suitable manner.

Vom Kolben 2' ragt nach oben eine Kolbenstange 7' ab, die das Gehäuse 1' abgedichtet durchgreift. Es ist hierzu eine Dichtung 16 vorgesehen. Auch bei dieser Ausführungsform wird der Kolben 2' bei Zündung des mit dem Kolben verbundenen Zünders 6' durch die dann frei werdende Gasmenge aus einer Ausgangslage in eine Endlage verschoben. Die Kolbenstange 7' löst dabei beim Verfahren in die Endlage oder in der Endlage einen Funktionsvorgang aus. Auch hierbei ist die Kolbenstange 7' in der Ausgangslage gemäß Figur 2 auf dem Gehäuse 1' nach oben vorragend angeordnet, während sie in der Endlage nach unten verschoben teilweise in das Gehäuse zurückverlagert ist. Auch hierbei sind wieder Mittel vorgesehen, um die bei Zündung des Zünders 6' frei werdende Gasmenge zu der Seite des Kolbens 2' zu führen, von der die Kolbenstange 7' abragt. Diese Mittel sind durch Kanäle 8' gebildet, die eine den Zünder 6' aufnehmende Kammer des Kolbens 2' mit einer Kammer 9' verbinden, von der mindestens ein Wandteil durch die Fläche des Kolbens 2' gebildet ist, von der die Kolbenstange 7' abragt. Bei dieser Ausführungsform ist der Zünder 6' in eine Öffnung am Boden des Kolbens 2' beziehungsweise des Flansches 15 eingesetzt, der der Kolbenseite abgewandt ist, von der die Kolbenstange 7' abragt. Der Kolben 2' weist dabei die Kanäle 8' oder Bohrungen auf, die den Gasauslass des Zünders 6' mit der Kolbenfläche verbinden, von der die Kolbenstange 7' abragt.From the piston 2 ' protrudes upward from a piston rod 7' , which passes through the housing 1 ' sealed. It is for this purpose a seal 16 is provided. In this embodiment too, the piston 2 'is displaced from an initial position to an end position upon ignition of the igniter 6' connected to the piston by the gas quantity then released. The piston rod 7 ' triggers a process during the process in the end position or in the end position. Again, the piston rod 7 ' in the starting position according to FIG. 2 arranged on the housing 1 ' upwardly projecting, while displaced in the end position downwardly partially displaced back into the housing. Here, too, means are again provided to guide the gas quantity released when the igniter 6 'is ignited to the side of the piston 2' from which the piston rod 7 ' protrudes. These means are formed by channels 8 ' which connect a detonator 6' receiving chamber of the piston 2 ' with a chamber 9' , of which at least one wall part by the surface of the piston 2 'is formed, from which the piston rod 7' protrudes , In this embodiment, the igniter 6 'is inserted into an opening at the bottom of the piston 2' or the flange 15 , which faces away from the piston side, from which the piston rod 7 ' protrudes. The piston 2 'in this case has the channels 8' or holes which connect the gas outlet of the igniter 6 ' with the piston surface from which the piston rod 7' protrudes.

Bei den Ausführungsformen gemäß Figur 3 bis 6 ist auf dem Gehäuse 1 beziehungsweise auf der mit dem Gehäuse 1 eine Einheit bildenden topfartigen Hülse 10 ein zweites Stellglied 17 parallel zur Stellrichtung des Kolbens verschieblich angeordnet und gegenüber dem Mantel des Gehäuses abgedichtet.In the embodiments according to FIGS. 3 to 6 is on the housing 1 or on the one with the housing 1 a unit-forming cup-shaped sleeve 10, a second actuator 17 is arranged displaceably parallel to the direction of the piston and sealed against the jacket of the housing.

Im Ausführungsbeispiel ist dabei eine Dichtung 18 zwischen dem Außenmantel der topfartigen Hülse 10 und dem Innenmantel des zweiten Stellgliedes 17 vorgesehen. Zwischen einer Wandung 19 des zweiten Stellgliedes 17 und der von der Kolbenstange 7 durchgriffenen Wandung des Gehäuses 1 beziehungsweise 10 ist eine abgedichtete Kammer 20 gebildet. Die Abdichtung erfolgt über die Dichtungen 18 und 21. Diese Kammer 20 ist über Kanäle 22 oder Bohrungen mit dem Hohlraum 3 verbunden, in welchem der Kolben 2 verschieblich angeordnet ist.In the exemplary embodiment, a seal 18 is provided between the outer jacket of the cup-shaped sleeve 10 and the inner jacket of the second actuator 17 . Between a wall 19 of the second actuator 17 and the attacked by the piston rod 7 wall of the housing 1 and 10 , a sealed chamber 20 is formed. The seal is made via the seals 18 and 21. This chamber 20 is connected via channels 22 or holes with the cavity 3 , in which the piston 2 is slidably disposed.

Bei der Ausführungsform nach Figur 6 münden die Kanäle 22 oder Bohrungen in einen Bereich des Hohlraumes 3 ein, der in Ausgangslage des Kolbens 2 oberhalb der Fläche des Kolbens 2 liegt, von dem die Kolbenstange 7 abragt. Hierdurch wird erreicht, dass dann, wenn der Zünder 6 ausgelöst wird und das Druckgas durch den Kanal 8 zur Kammer 9 strömt, gleichzeitig über den Kanal 22 Druckgas in die Kammer 20 strömt. Es wird dabei also gleichzeitig der Kolben 2 in der Zeichnungsfigur 6 in die Ausgangslage nach unten verfahren und bei gestellfester Anordnung des Gehäuses 1 beziehungsweise 10 das zweite Stellglied 17 nach oben verschoben. Hierdurch ist ein doppelwirkender Aktor realisiert, der einerseits eine Zugbewegung auf ein Element mit der Kolbenstange 7 ausübt und andererseits eine Druckbewegung mit dem zweiten Stellglied 17 auf Bestandteile ausüben kann.In the embodiment according to FIG. 6 open the channels 22 or holes in a region of the cavity 3 , which is in the initial position of the piston 2 above the surface of the piston 2 , from which the piston rod 7 protrudes. This ensures that when the igniter 6 is triggered and the compressed gas flows through the channel 8 to the chamber 9 , simultaneously via the channel 22 pressurized gas flows into the chamber 20 . It is thus simultaneously moved the piston 2 in the drawing Figure 6 in the starting position down and moved in frame-fixed arrangement of the housing 1 and 10, the second actuator 17 upwards. In this way, a double-acting actuator is realized, on the one hand exerts a pulling movement on an element with the piston rod 7 and on the other hand can exert a pressure movement with the second actuator 17 to components.

Bei der Ausführungsform nach Figur 3 bis 5 münden die Kanäle 22 oder Bohrungen in einen Bereich des Hohlraumes 3 ein, der in Ausgangslage des Kolbens 2, wie in Figur 3 ersichtlich, unterhalb der Fläche des Kolbens 2 liegt, von der die Kolbenstange 7 abragt. Hierdurch wird erreicht, dass erst dann, wenn der Kolben 2 nach Zündung des Zünders 6 aus der Position gemäß Figur 3 in die Position gemäß Figur 4 verschoben wird, der Kanal 22 freigegeben wird, so dass Druckgas über diesen Kanal 22 in die Kammer 20 strömen kann. Hierdurch erfolgt eine Verschiebung des zweiten Stellgliedes 17 aus der Position gemäß Figur 4 in die Position gemäß Figur 5. In the embodiment according to FIGS. 3 to 5 open the channels 22 or holes in a region of the cavity 3 , which in the initial position of the piston 2, as in FIG. 3 seen below the surface of the piston 2 , from which the piston rod 7 protrudes. This ensures that only when the piston 2 after ignition of the igniter 6 from the position according to FIG. 3 in the position according to FIG. 4 is shifted, the channel 22 is released, so that compressed gas can flow through this channel 22 into the chamber 20 . This results in a displacement of the second actuator 17 from the position according to FIG. 4 in the position according to FIG . 5.

Je nach Anordnung des Anschlusses des Kanals 22 an den Hohlraum 3 kann also eine gleichzeitige Betätigung der Kolbenstange 7 und des zweiten Stellgliedes 17 oder eine zeitlich aufeinander folgende Bewegung dieser Teile erfolgen.Depending on the arrangement of the connection of the channel 22 to the cavity 3 , therefore, a simultaneous actuation of the piston rod 7 and the second actuator 17 or a temporally successive movement of these parts take place.

Im Ausführungsbeispiel ist das zweite Stellglied 17 als topfartige Hülse ausgebildet, die auf das Gehäuse 1 beziehungsweise die topfartige Hülse 10' aufgeschoben ist und deren Boden von der Kolbenstange 7 abgedichtet durchgriffen ist. Zusätzlich weist das zweite Stellglied 17 nach außen abragende Funktionsflächen 23 auf, mittels derer bei Verschiebung des zweiten Stellgliedes 17 relativ zum Gehäuse 1 beziehungsweise 10 ein Vorgang auslösbar ist, also bestimmte mit den Funktionsflächen 23 gekoppelte Elemente betätigbar sind. Im Ausführungsbeispiel sind die FunktionsfJächen 23 durch einen nach außen abragenden Flanschrand des als topfartige Hülse ausgebildeten zweiten Stellgliedes gebildet.In the exemplary embodiment, the second actuator 17 is formed as a cup-shaped sleeve which is pushed onto the housing 1 or the cup-shaped sleeve 10 ' and whose bottom is penetrated by the piston rod 7 sealed. In addition, the second actuator 17 outwardly projecting functional surfaces 23 , by means of which when moving the second actuator 17 relative to the housing 1 or 10, a process can be triggered, so certain with the functional surfaces 23 coupled elements are actuated. In the exemplary embodiment, the functional surfaces 23 are formed by an outwardly projecting flange edge of the second actuator designed as a cup-shaped sleeve.

In an sich bekannter Weise kann die Bewegung des Kolbens 2 in der Endlage gedämpft werden, um überschüssige kinetische Energie abzubauen. Dies kann durch ein oder mehrere Verformungselemente erfolgen, die in Bewegungsrichtung des Kolbens liegen.In a manner known per se, the movement of the piston 2 in the end position can be damped in order to reduce excess kinetic energy. This can be done by one or more deformation elements, which lie in the direction of movement of the piston.

Die Erfindung ist nicht auf das Ausführungsbeispiel beschränkt, sondern im Rahmen der Offenbarung vielfach variabel. Alle neuen, in der Beschreibung und/oder Zeichnung offenbarten Einzel- und Kombinationsmerkmale werden als erfindungswesentlich angesehen.The invention is not limited to the embodiment, but in the context of the disclosure often variable. All new, disclosed in the description and / or drawing single and combination features are considered essential to the invention.

Claims (11)

  1. Pyrotechnic actuator having a housing (1), which has a cavity (3),
    in which a piston (2) is mounted displaceable, a pyrotechnic detonator (6) being arranged, the gas outlet of which is connected to the cavity (3), with the result that the piston (2) can be moved out of an initial position, the rest position, into an end position, the working position, by a gas quantity which is released during the detonation of the detonator (6), and a piston rod (7) which is connected to the piston (2) reaching through an opening of the housing (1) in a sealed manner and, on the path of the piston (2) out of the initial position to its end position or in the end position, triggering an operation, wherein the piston rod (7) is arranged so as to project out of the housing (1) in the initial position and is displaced back into the housing (1) partially or completely in the end position, and wherein means are provided, by means of which the gas quantity which is released during the detonation of the detonator (6) is guided to the side of the piston (2) and loads the side of the piston (2), from which the piston rod (7) protrudes, characterized in that a second actuating element (17) is arranged on the housing (1), such that it can be displaced parallel to the actuating direction of the piston (2), and is sealed with respect to the shell of the housing (1), a sealed chamber (20) being formed between a wall of the actuating element (17) and that wall of the housing (1), through which the piston rod (7) can reach, and in that the chamber (20) is connected via channels (22) or holes to the cavity (3), in which the piston (2) is arranged.
  2. Actuator according to Claim 1, characterized in that the means are formed by channels (8) which connect a chamber, which accommodates the detonator (6), to a chamber (9), of which at least one wall part is formed by the face of the piston (2), from which the piston rod (7) protrudes.
  3. Actuator according to either of Claims 1 and 2, characterized in that the detonator (6) is inserted into an opening of the housing base which faces away from the housing side, through which the piston rod (7) can reach, the housing (1) being configured as a solid body with a cavity (3) formed in it for accommodating the piston (2), and the housing body having channels (8) or holes which connect the gas outlet of the detonator (6) to that face of the piston (2) which faces away from the housing base.
  4. Actuator according to either of Claims 1 and 2, characterized in that the detonator (6') is inserted into an opening on the base of the piston (2'), which base faces away from the piston side, from which the piston rod (7') protrudes, the piston (2') having channels (8') or holes which connect the gas outlet of the detonator (6') to the piston face which faces away from the base and from which the piston rod (7') protrudes.
  5. Actuator according to one of Claims 1 to 4, characterized in that the channels (22) or holes open into a region of the cavity (3) which, in the initial position of the piston (2), lies above the face of the piston (2), from which the piston rod (7) protrudes.
  6. Actuator according to one of Claims 1 to 5, characterized in that the channels (22) or holes open into a region of the cavity (3) which, in the initial position of the piston (2), lies below the face of the piston (2), from which the piston rod (7) protrudes.
  7. Actuator according to one of Claims 1 to 6, characterized in that the second actuating element (17) is configured as a cup-like sleeve which is pushed onto the housing (1) and through the base of which the piston rod (7) reaches in a sealed manner.
  8. Actuator according to one of Claims 1 to 7, characterized in that the second actuating element (17) has functional faces (23) which protrude to the outside and by means of which an operation can be triggered if the actuating element (17) is displaced relative to the housing (1).
  9. Actuator according to Claims 7 and 8, characterized in that the functional faces (23) are formed by an outwardly protruding flange edge of the cup-like sleeve.
  10. Actuator according to one of Claims 1 to 9, characterized in that the adjustment of the piston (2) and/or the second actuating element (17) takes place by means of the gas quantity which is released by the detonator (6), counter to the force of a restoring spring (13) which is supported on constituent parts of the actuator.
  11. Actuator according to one of Claims 1 to 10, characterized in that deformation parts or movement dampers are arranged in the cavity (3) which accommodates the piston (2) and/or on the piston (2), which deformation parts or movement dampers brake the movement of the piston (2) during movement of the piston (2) into the end position, preferably briefly before the end position is reached.
EP07711670A 2006-03-10 2007-02-27 Pyrotechnic actuator Not-in-force EP1994289B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006011525 2006-03-10
PCT/EP2007/001647 WO2007104421A1 (en) 2006-03-10 2007-02-27 Pyrotechnic actuator

Publications (2)

Publication Number Publication Date
EP1994289A1 EP1994289A1 (en) 2008-11-26
EP1994289B1 true EP1994289B1 (en) 2009-07-22

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EP07711669A Not-in-force EP1994288B1 (en) 2006-03-10 2007-02-27 Pyrotechnic actuator
EP07711670A Not-in-force EP1994289B1 (en) 2006-03-10 2007-02-27 Pyrotechnic actuator

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EP07711669A Not-in-force EP1994288B1 (en) 2006-03-10 2007-02-27 Pyrotechnic actuator

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EP (2) EP1994288B1 (en)
AT (2) ATE439525T1 (en)
DE (2) DE502007001132D1 (en)
WO (2) WO2007104421A1 (en)

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Publication number Priority date Publication date Assignee Title
CN110873545A (en) * 2018-09-02 2020-03-10 孝感定原电子科技有限公司 Initiating explosive actuator

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597919A (en) * 1969-03-24 1971-08-10 Gen Electric Linear gas generator actuated latching and thrusting device
DE2253657C2 (en) * 1972-11-02 1984-09-06 Dynamit Nobel Ag, 5210 Troisdorf Device for tensioning seat belts in vehicles
US4037821A (en) * 1976-08-10 1977-07-26 The United States Of America As Represented By The Secretary Of The Army Telescoping retractor
US4054032A (en) * 1976-09-03 1977-10-18 Networks Electronic Corporation Explosive actuated pin puller
JPS5912910Y2 (en) * 1978-08-25 1984-04-18 株式会社日本自動車部品総合研究所 Backlash prevention device for seat belt tightening device
FR2721073B1 (en) * 1994-06-09 1996-08-30 Ecia Equip Composants Ind Auto Trigger actuator piloted to maneuver an organ of a motor vehicle.
FR2807123B1 (en) * 2000-03-29 2002-09-13 Pyroalliance RESETABLE SEPARATION NUT WITH LOW LEVEL OF INDUCED SHOCK
US6942185B2 (en) * 2002-05-07 2005-09-13 Atair Aerospace, Inc. Pneumatic riser release
US20040007123A1 (en) * 2002-07-10 2004-01-15 Ritchie Robert S. Hermetically sealed actuator

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Publication number Publication date
DE502007001301D1 (en) 2009-09-24
WO2007104420A1 (en) 2007-09-20
ATE439525T1 (en) 2009-08-15
EP1994289A1 (en) 2008-11-26
EP1994288A1 (en) 2008-11-26
ATE437308T1 (en) 2009-08-15
WO2007104421A1 (en) 2007-09-20
DE502007001132D1 (en) 2009-09-03
EP1994288B1 (en) 2009-08-12

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