EP1582321A1 - Vorrichtung zur Durchtrennung einer Fahrzeugstruktur - Google Patents

Vorrichtung zur Durchtrennung einer Fahrzeugstruktur Download PDF

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Publication number
EP1582321A1
EP1582321A1 EP05290641A EP05290641A EP1582321A1 EP 1582321 A1 EP1582321 A1 EP 1582321A1 EP 05290641 A EP05290641 A EP 05290641A EP 05290641 A EP05290641 A EP 05290641A EP 1582321 A1 EP1582321 A1 EP 1582321A1
Authority
EP
European Patent Office
Prior art keywords
tube
pyrotechnic charge
groove
cutting
charge
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
Application number
EP05290641A
Other languages
English (en)
French (fr)
Other versions
EP1582321B1 (de
Inventor
Evrard Borg
Eric Laspesa
Laurent D'emmanuelle
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.)
Safran Ceramics SA
Original Assignee
Pyroalliance SA
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 Pyroalliance SA filed Critical Pyroalliance SA
Publication of EP1582321A1 publication Critical patent/EP1582321A1/de
Application granted granted Critical
Publication of EP1582321B1 publication Critical patent/EP1582321B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/04—Severing by squeezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
    • F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
    • F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means
    • F42B15/38—Ring-shaped explosive elements for the separation of rocket parts
    • 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

Definitions

  • the technical field of the invention is that of automotive safety involving cutting a structure like, for example, a table on board, in order to put into action a security.
  • Cutting devices according to the invention are particularly suitable for the implementation of protective cushions in a motor vehicle.
  • EP 0 273 061 which describes a separation joint between two structures and involving a linear explosive charge confined in a tube flattened.
  • the two structures fit together in one the other and the firing of the explosive charge causes an expansion of the tube which then deforms one of the two structures that lead to their dissociation.
  • Load explosive is not specifically described but the description reveals some clues that leave think it's an explosive charge.
  • the separation device disclosed in US Patent 6,170,400 or in US Patent 5,372,071 puts in play a detonating cord whose firing goes cause the deformation of the tube in which it is housed to push a piston to separate two subsets.
  • US Pat. No. 5,478,106 which describes an opening system for deploying a airbag.
  • This opening system includes a deformed tube having a tapered portion and in which is housed a linear pyrotechnic charge. The firing of said load causes the tube to expand tapered part comes in contact with the structure for the cut.
  • the cutting devices according to the invention make intervene in the explosion-proof cords, housed in flattened tubes and their firing causes expansion the section of said tubes for cutting a structure.
  • Explosion cords have reaction speeds slower than those of detonating cords and by therefore, the associated pyrotechnic effects are less violent and in particular, the risks of projection of shrapnel and emission of a shock wave aerial outward of said devices become negligible.
  • Cutting devices according to the invention are particularly suitable for vehicles automobiles to the extent that they are reliable and effective, while providing a level of security increased by limiting the intensity of the reaction and therefore the potential for bodily injury.
  • the subject of the present invention relates to a cutting device of a structure in a automobile comprising a linear pyrotechnic charge placed in a flattened deformable tube, the combustion of said load causing the deformation of the tube which increases its section, said deformation causing the rupture of the structure, characterized in that the burning rate of the pyrotechnic charge is less than 3000m / s.
  • This equivalence is desirable because a deflagration although defining a reaction more long and less violent than a detonation remains relatively undefined as to the value of certain parameters that characterize it.
  • the burning speed of the pyrotechnic charge is between 1000m / s and 2000m / s.
  • Explosive charges retained for cutting devices according to the invention are bright enough to cause cutting of a structure in a motor vehicle, without present the inconvenience associated with the use of a detonating load such as, for example, the risks of rupture of the cutting device with emission of effects undesirable pyrotechnics such as shockwave aerial and projection of fragments.
  • the pyrotechnic charge comprises a plurality of strands such as, for example, those are described in US Patent 4,220,087.
  • the tube is metallic.
  • said tube has a good aptitude for plastic deformation.
  • the tube is closed at each of its ends by a stopper to contain the pyrotechnic effects inside said tube.
  • the tube is aluminum.
  • an ignition device of the pyrotechnic charge comprising an igniter, is placed at one end of the tube.
  • the flattened tube is housed in a groove of the structure having a section in the form of , the bottom of the groove having a secondary groove and the tube being held by means of a closing clip.
  • the linear density of the Pyrotechnic charge is less than 4g / m.
  • Cutting devices according to the invention have the advantage of not being dangerous for people, whether in normal operation or erratic, in so far as the effects produced remain low intensity. Moreover, they are reliable because the firing such compositions is perfectly control. Finally, because of the great diversity of Explosive compositions that can be used, cutting devices according to the invention can adapt to a lot of related configurations particular to the thickness of the structure to be cut, material constituting said structure, on the surface to cut.
  • Figure 1 is a side axial sectional view of a cutting device according to the invention, positioned compared to the structure to be cut and not having still worked.
  • FIG. 2 represents the cutting device of Figure 1 after operation.
  • the cutting device 1 is inserted into a groove 2 of the structure 3 to be cut, said groove 2 having a section in the form of and whose bottom has a secondary groove in the form of v so that the thickness of the structure 3 at the level of said secondary groove 4 is minimum.
  • a linear pyrotechnic charge consisting of three strands is housed in the center of a deformable hollow aluminum tube 6, said tube 6 being flattened so as to have an elongated section having two planar sides, parallel to each other, and interconnected by two segments in an arc of a circle, said load 5 being in contact with the two planar sides of the tube 6.
  • the space remaining between the pyrotechnic charge 5 and the inner wall of the tube 6 is filled by an elastomer foam 7 to help maintain said load 5 at the center of said tube 6.
  • the tube 6 occupies the groove 2 without lateral play, that is, the two planar sides of the tube 6 are each in contact with the walls of the groove 2.
  • the groove 2 is formed in a bead of the structure 3 and the tube 6 is held in the groove 2 by means of a closing clip 8 covering said groove 2.
  • the tube 6 in the groove 2 is in contact with both the bottom of said groove 2 and the groove 2. lip 8 of closure.
  • An ignition device comprising a single igniter is placed near the tube 6. Two plugs close the ends of said tube 6.
  • the mode of operation of the cutting device according to the invention is as follows.
  • the firing of the pyrotechnic charge 5 causes the production of gas in the tube 6 which then undergoes a significant internal pressure.
  • the tube 6 reacts by deforming to adopt a circular section.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Air Bags (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Harvester Elements (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Body Structure For Vehicles (AREA)
EP05290641A 2004-04-02 2005-03-24 Vorrichtung zur Durchtrennung einer Fahrzeugstruktur Not-in-force EP1582321B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0403469A FR2868351B1 (fr) 2004-04-02 2004-04-02 Dispositif de decoupe d'une structure dans un vehicule automobile
FR0403469 2004-04-02

Publications (2)

Publication Number Publication Date
EP1582321A1 true EP1582321A1 (de) 2005-10-05
EP1582321B1 EP1582321B1 (de) 2007-03-07

Family

ID=34878487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05290641A Not-in-force EP1582321B1 (de) 2004-04-02 2005-03-24 Vorrichtung zur Durchtrennung einer Fahrzeugstruktur

Country Status (7)

Country Link
US (1) US20050217466A1 (de)
EP (1) EP1582321B1 (de)
JP (1) JP2005288686A (de)
AT (1) ATE355945T1 (de)
DE (1) DE602005000645T2 (de)
ES (1) ES2281886T3 (de)
FR (1) FR2868351B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3130363A1 (fr) * 2021-12-15 2023-06-16 Pyroalliance Ensemble séparable par découpe pyrotechnique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6097523B2 (ja) * 2012-10-26 2017-03-15 鹿島建設株式会社 装薬物および装薬物の設置方法
CN108195236B (zh) * 2018-01-12 2019-03-22 北京航空航天大学 一种分离式自毁安控装置及火箭

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0273061A1 (de) * 1985-06-24 1988-07-06 McDONNELL DOUGLAS CORPORATION Trennungsvorrichtung
US5372071A (en) * 1993-07-13 1994-12-13 Tracor, Inc. Thrusting separation system
US6170400B1 (en) * 1998-06-02 2001-01-09 AEROSPATIALE Soci{acute over (e)}t{acute over (e)}Nationale Industrielle Device for the cutting of nonmetallic parts by means of a pyrotechnic expansion tube
FR2806342A1 (fr) * 2000-03-15 2001-09-21 Lacroix Soc E Dispositif pour la rupture controlee sans choc de structures

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076408A (en) * 1958-06-11 1963-02-05 Borg Warner Controlled fracturing of solids by explosives
US3698281A (en) * 1970-02-27 1972-10-17 Lockheed Aircraft Corp Explosive system
GB1301607A (de) * 1970-06-25 1973-01-04
US4220087A (en) * 1978-11-20 1980-09-02 Explosive Technology, Inc. Linear ignition fuse
US4301707A (en) * 1979-10-29 1981-11-24 Mcdonnell Douglas Corporation Embedded explosive severance of non-metallic materials
US5392684A (en) * 1993-06-25 1995-02-28 The Ensign-Bickford Company Explosive thrust-producing coupling
US5478106A (en) * 1994-07-22 1995-12-26 Tip Engineering Group, Inc. Method and arrangement for forming an air bag deployment opening
KR100576950B1 (ko) * 1997-09-08 2006-05-10 조디악 오토모티브 유에스 인크. 분산 장입물 팽창 시스템
US6454038B2 (en) * 1998-04-09 2002-09-24 Certime Amsterdam B.V. Collapsible panel and method for controlled collapsing thereof
US6336611B1 (en) * 1998-04-09 2002-01-08 Certime Amsterdam B.V. Collapsible panel and method for controlled collapsing thereof
US6176517B1 (en) * 1998-10-23 2001-01-23 Autoliv Aspinc. Gas generating apparatus
FR2799708B1 (fr) * 1999-09-24 2001-12-07 Livbag Snc Structure metallique gonflable a chargement pyrotechnique integre
US6886469B2 (en) * 2002-05-17 2005-05-03 Zodiac Automotive Us Inc. Distributed charge inflator system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0273061A1 (de) * 1985-06-24 1988-07-06 McDONNELL DOUGLAS CORPORATION Trennungsvorrichtung
US5372071A (en) * 1993-07-13 1994-12-13 Tracor, Inc. Thrusting separation system
US6170400B1 (en) * 1998-06-02 2001-01-09 AEROSPATIALE Soci{acute over (e)}t{acute over (e)}Nationale Industrielle Device for the cutting of nonmetallic parts by means of a pyrotechnic expansion tube
FR2806342A1 (fr) * 2000-03-15 2001-09-21 Lacroix Soc E Dispositif pour la rupture controlee sans choc de structures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3130363A1 (fr) * 2021-12-15 2023-06-16 Pyroalliance Ensemble séparable par découpe pyrotechnique

Also Published As

Publication number Publication date
EP1582321B1 (de) 2007-03-07
ES2281886T3 (es) 2007-10-01
FR2868351B1 (fr) 2006-06-23
DE602005000645T2 (de) 2007-11-08
DE602005000645D1 (de) 2007-04-19
ATE355945T1 (de) 2007-03-15
FR2868351A1 (fr) 2005-10-07
US20050217466A1 (en) 2005-10-06
JP2005288686A (ja) 2005-10-20

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