EP0717253B1 - Abdichtung einer Feuerwaffe für hülsenlose Munition - Google Patents

Abdichtung einer Feuerwaffe für hülsenlose Munition Download PDF

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Publication number
EP0717253B1
EP0717253B1 EP95402532A EP95402532A EP0717253B1 EP 0717253 B1 EP0717253 B1 EP 0717253B1 EP 95402532 A EP95402532 A EP 95402532A EP 95402532 A EP95402532 A EP 95402532A EP 0717253 B1 EP0717253 B1 EP 0717253B1
Authority
EP
European Patent Office
Prior art keywords
seal
barrel
sealing
sealing device
breech
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
EP95402532A
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English (en)
French (fr)
Other versions
EP0717253A1 (de
Inventor
Françoise Simon
Franck Bouvard
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.)
Giat Industries SA
Original Assignee
Giat Industries 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 Giat Industries SA filed Critical Giat Industries SA
Publication of EP0717253A1 publication Critical patent/EP0717253A1/de
Application granted granted Critical
Publication of EP0717253B1 publication Critical patent/EP0717253B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/74—Obturating or packing devices for gas leak prevention in breech mechanisms

Definitions

  • the technical field of the present invention is that small arms small arms firing ammunition without socket.
  • EP251902 and US3799560 describe various types of gun shutters. These shutters have a specific structure of a given weapon type: EP251902 and GB2233747 are suitable for large caliber barrels with breech corner and US3799560 is specific to chamber weapons multiple. These complex shutters cannot be used for a small caliber ammunition weapon without a case and they also do not solve the problem of the heating of the sealing device encountered in such weapons.
  • the object of the present invention is therefore to provide a device for sealing the combustion gases of a munition without a socket ensuring this seal for an instantaneous temperature of the order of 2500 ° C. and a pressure of approximately 5.10 7 Pa.
  • Another object of the present invention is to provide a sealing device, the cooling of which limits its warming up for bursts of ammunition of around 150 in a minute.
  • the invention therefore relates to a sealing device to the combustion gases of a munition without socket, mounted between the barrel and the breech chamber of a firearm small caliber, and including a seal which consists of a sealing part of annular shape, one face of which end forms an axial sealing surface intended for come to bear on the rear face of the barrel, and which comprises towards its other end a radial sealing lip intended to bear on the internal wall of the chamber cylinder head, device characterized in that the gasket also includes a cooling section which extends axially over a length greater than that of the part sealing to limit the heating of the latter which is in contact with the combustion gases.
  • the seal is floatingly attached between the barrel and the breech of so that it can move axially under the action of the combustion gas pressure.
  • the part joint cooling is annular, coaxial externally to the sealing part of the joint and connected to the periphery of the latter by an annular radial wall.
  • the axial position of the connecting wall between the two parts of the seal is such that, on the barrel side, the sealing part, the cooling part and the joint connection wall delimit between them a gas decompression cavity combustion.
  • the cooling part of the seal is intended to be housed in an annular space delimited between the rear part of the barrel and the breech, and is used to ensure the floating fixing of the joint.
  • the cooling part of the gasket is fixed to the cylinder head by at least one connecting means freely engaging inside an oblong opening formed in the wall of the cooling part of the seal, this connecting means being for example a screw, the head of which East blocked by the cylinder head and whose rod engages in the aforementioned opening.
  • the two sealing parts and cooling which form the joint form a part monobloc which is made of spring steel, by example.
  • An advantage of the sealing device according to the invention resides in the fact that the seal is provided by a single piece device facilitating its manufacture and its mounting in the weapon and consequently its replacement in the event of deterioration.
  • Another advantage is the use of the combustion gas pressure to ensure the displacement of the sealing device and its deformation.
  • Weapon 1 partially shown in section longitudinal in Figure 1 includes an aligned barrel with cylinder head 3 in chamber 3a of which is housed ammunition 4 without casing consisting of a charge propellant 5 and a projectile 6 engaged in the barrel.
  • Ammunition 4 is fired using a device initiation 7 electric or percussion.
  • Canon 2 and the cylinder head 3 are fixed to each other using a cylinder head lock 8.
  • the cylinder head 3 is subjected to the action a recovery spring 9 which applies to the cylinder head 3 an axial force F.
  • the cooling part 15 of the seal 11 is annular in shape, coaxial outside the part seal 12 and connected to the periphery of the latter by an annular radial wall 16.
  • the axial position of the connecting wall 16 is such that, on the barrel side, the sealing part 12, cooling part 15 and the connecting wall 16 delimit between them a cavity 17 decompression of combustion gases.
  • the cooling part 15 extends in the same side of the connecting wall 16 and towards canon 2.
  • the seal 11 is made of a material elastically deformable with thermomechanical properties high temperatures and a wide range of operating, between - 50 ° and 450 °, this material being for example a spring steel.
  • the sealing part 12 of the seal 11 has an outside diameter of the order of 13 mm, extends over a length of 5.5 mm, the lip having a thickness of the order of 0.4 mm, the cooling part 14 extends over a length of the order of 9 mm and has a thickness of the order of 3.7 mm, and the cavity of decompression has a width of the order of 2.5 mm.
  • the part cooling 15 extends axially over a length greater than that of the sealing part 12, so as to allow cooling of the seal 11 by limiting the heating of the sealing part 12 which is directly in contact with the combustion gases, so that its temperature remains below the temperature of income from the constituent steel.
  • the part cooling 15 of the seal 11 is intended to be housed in an annular space 18 delimited between the part rear of the barrel 2 and the breech 3.
  • the seal 11 is intended to be mounted pre-clamped between the barrel 2 and the cylinder head 3 on the one hand, and floatingly attached to ability to move axially under the action of combustion.
  • the floating mounting of the seal 11 allows guarantee its positioning between the barrel 2 and the cylinder head 3 when the pressure builds up in the bedroom 3a.
  • the seal 11 is fixed to the cylinder head 3 by at least one engaging means 20 engaging freely inside an oblong opening 22 formed in the wall of the cooling part 15 of the joint 11.
  • This connecting means 20 is for example constituted by a screw, the head 20a of which is locked in the cylinder head 3, while its rod 20b engages freely in the opening 22.
  • Seal 11 is mounted pre-clamped between the barrel 2 and the breech 3 by the action of the recovery spring 9 which acts on the cylinder head 3, so that its axial end surface 13 is in support against the rear face 2a of the barrel 2 but with presence of a minimum radial clearance Jr between the lip sealing 14 and the internal wall of chamber 3a.
  • the elastic deformation of the seal 11 will allow it to be applied intimately under the effect of the pressure of the combustion gases against the barrel 2 by axial plating of the surface 13 of the sealing part 12 and against the wall of the chamber 3a by elastic deformation of the lip 14. More precisely, after ignition of the propellant charge 5, the pressure increases in the chamber 3a and the seal 11 passes through two successive phases from the initial position shown in FIG. 3 At the start of the shot, as shown in FIG. 4, the pressure passes through a value P0 of 4.10 7 Pa, called pressing pressure, at which the radial clearance Jr for mounting the seal 11 in the chamber 3a is eliminated by elastic deformation of the lip 14 which is pressed against the internal wall of the chamber 3a.
  • the pressure reaches its maximum value, of the order of 5.10 7 Pa, the temperature its maximum value, approximately 2500 ° C, and as shown in Figure 5, the seal 11, the barrel 2 and the cylinder head 3 are deformed uniformly.
  • the seal 11 slides in its housing opening 22 and maintains the radial and axial seals by elastic deformation of the sealing part subjected directly to the action of the combustion gases.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Secondary Cells (AREA)
  • Gasket Seals (AREA)
  • Measuring Fluid Pressure (AREA)

Claims (10)

  1. Abdichtungsvorrichtung gegen die Verbrennungsgase einer Munition (4) ohne Hülse, die zwischen dem Lauf (2) und der Kammer (3a) des Verschlusses einer Schußwaffe (1) kleinen Kalibers montiert wird und aus einer Dichtung (11) besteht, die aus einem Abdichtungsteil (12) in Ringform gebildet wird, dessen eine Endfläche eine axiale Abdichtungsoberfläche (13) bildet, die dazu bestimmt ist, gegen die hintere Fläche (2a) des Laufs (2) zum Aufliegen zu kommen, und die an ihrem anderen Ende eine radiale Abdichtungslippe (14) umfaßt, die dazu bestimmt ist, auf der Innenwand der Verschlußkammer (3a) zum Aufliegen zu kommen, gekennzeichnet dadurch, daß die Dichtung (11) außerdem einen Kühlteil (15) umfaßt, der sich axial über eine Länge erstreckt, die größer ist als die des Abdichtungsteils (12), um die Erhitzung des Abdichtungsteils zu begrenzen, der mit den Verbrennungsgasen in Berührung ist.
  2. Abdichtungsvorrichtungen gemäß dem Anspruch 1, gekennzeichnet dadurch, daß die Dichtung (11) schwimmend zwischen dem Lauf (2) und dem Verschluß (3) so befestigt ist, daß sie sich axial unter der Einwirkung des Drucks der Verbrennungsgase verschieben kann.
  3. Abdichtungsvorrichtung gemäß dem Anspruch 1 oder 2, gekennzeichnet dadurch, daß der Kühlteil der Dichtung (11) Ringform hat, zum Abdichtungsteil (12) der Dichtung extern koaxial ist und mit der Peripherie dieser Dichtung über eine radiale ringförmige Wand (16) verbunden ist.
  4. Abdichtungsvorrichtung gemäß dem Anspruch 3, gekennzeichnet dadurch, daß die axiale Position der Verbindungswand (16) so beschaffen ist, daß der Abdichtungsteil (12), der Kühlteil (15) und die Verbindungswand (16) der Dichtung (11) auf der Laufseite untereinander einen Dekompressionshohlraum (17) für die Verbrennungsgase bilden.
  5. Abdichtungsvorrichtung gemäß dem Anspruch 3 oder 4, gekennzeichnet dadurch, daß der Kühlteil (15) der Dichtung (11) dazu bestimmt ist, sich in einen Ringraum (18) zu fügen, der zwischen dem hinteren Teil des Laufs (2) und dem Verschlusses (3) abgegrenzt wird.
  6. Abdichtungsvorrichtung gemäß dem Anspruch 5, gekennzeichnet dadurch, daß der Kühlteil (15) der Dichtung (11) am Verschluß (3) durch mindestens ein Verbindungsmittel (20) befestigt ist, das sich frei in das Innere einer länglichen Öffnung (22) erstreckt, die in der Wand des Kühlteils (15) der Dichtung (11) angeordnet wird.
  7. Abdichtungsvorrichtung gemäß dem Anspruch 6, gekennzeichnet dadurch, daß das Verbindungsmittel (2 ) eine Schraube ist, deren Kopf (20a) vom Verschluß (3) blockiert wird und deren Schaft (20b) sich in die Öffnung (22) des Kühlteils (15) einfügt.
  8. Abdichtungsvorrichtung gemäß einem beliebigen der vorhergehenden Ansprüche, gekennzeichnet dadurch, daß die Dichtung (11) aus einem elastisch verformbaren Werkstoff besteht und hohe wärmetechnische Eigenschaften besitzt.
  9. Abdichtungsvorrichtung gemäß dem Anspruch 8, gekennzeichnet dadurch, daß die Dichtung (11) aus Federstahl besteht.
  10. Abdichtungsvorrichtung gemäß dem Anspruch 8 oder 9, gekennzeichnet dadurch, daß die Dichtung (11) zwischen dem Lauf (2) und dem Verschluß (3) gespannt montiert ist.
EP95402532A 1994-12-12 1995-11-13 Abdichtung einer Feuerwaffe für hülsenlose Munition Expired - Lifetime EP0717253B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414911 1994-12-12
FR9414911A FR2728064A1 (fr) 1994-12-12 1994-12-12 Dispositif d'etancheite pour arme a feu a munition sans douille

Publications (2)

Publication Number Publication Date
EP0717253A1 EP0717253A1 (de) 1996-06-19
EP0717253B1 true EP0717253B1 (de) 1999-08-25

Family

ID=9469697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402532A Expired - Lifetime EP0717253B1 (de) 1994-12-12 1995-11-13 Abdichtung einer Feuerwaffe für hülsenlose Munition

Country Status (5)

Country Link
US (1) US5777256A (de)
EP (1) EP0717253B1 (de)
AT (1) ATE183820T1 (de)
DE (1) DE69511667T2 (de)
FR (1) FR2728064A1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905896A1 (de) * 1999-02-11 2000-08-17 Hilti Ag Pulverkraftbetriebenes Setzgerät
DE10213928A1 (de) * 2002-03-28 2003-10-09 Rheinmetall W & M Gmbh Mörserrohr
FR2862377A1 (fr) * 2003-11-14 2005-05-20 Philippe Courty Systeme d'etancheite de chambre pour munitions sans etuis
DE102005020669A1 (de) * 2005-05-03 2006-11-09 Diehl Bgt Defence Gmbh & Co. Kg Dichtung, insbesondere für hülsenlose Munition
KR101049094B1 (ko) 2008-10-16 2011-07-15 국방과학연구소 약실교환형 총열 장치 및 이를 구비하는 탄자파편충격시험기
EP2639252A1 (de) 2012-03-14 2013-09-18 Sika Technology AG Neue Reaktivpolymerkatalysatoren für 2K-Epoxidharzsysteme
US9146086B2 (en) 2012-09-28 2015-09-29 Vista Outdoor Operations Llc Muzzleloader bullet system
US10605577B2 (en) 2012-09-28 2020-03-31 Vista Outdoor Operations Llc Muzzleloader systems
US11668549B2 (en) 2012-09-28 2023-06-06 Federal Cartridge Company Muzzleloader systems
US9329003B2 (en) 2012-09-28 2016-05-03 Vista Outdoor Operations Llc Muzzleloader systems
US10030956B2 (en) 2012-09-28 2018-07-24 Vista Outdoor Operations Llc Muzzleloader systems
USD849874S1 (en) 2018-01-21 2019-05-28 Vista Outdoor Operations Llc Muzzleloader propellant cartridge

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL82053C (de) * 1950-08-23
FR1157474A (fr) * 1956-08-24 1958-05-29 France Etat Perfectionnements aux dispositifs d'étanchéité pour armes automatiques
US3006254A (en) * 1960-02-17 1961-10-31 Robert J Thierry Self-energizing breech seal for guns
US3159938A (en) * 1962-07-27 1964-12-08 Jr John W Treat Gas seal for rotatable cartridge drum
US3626620A (en) * 1969-01-15 1971-12-14 Maremont Corp Gun having a floating firing chamber
US3762328A (en) * 1969-01-15 1973-10-02 Maremont Corp Caseless ammunition and gun therefor
US3613500A (en) * 1969-02-18 1971-10-19 Trw Inc Combination projectile guide and firing chamber seal
US3645166A (en) * 1969-07-28 1972-02-29 Gen Motors Corp Obturator for caseless ammunition firearm
US3799560A (en) * 1971-03-04 1974-03-26 Gen Electric Firearm chamber seal
DE2435520C3 (de) * 1974-07-24 1979-11-15 Diehl Gmbh & Co, 8500 Nuernberg Verschlußdichtung für großkalibrige Waffen
FR2600762B1 (fr) * 1986-06-25 1990-04-27 France Etat Armement Systeme d'etancheite tube-culasse
DE3922334C2 (de) * 1989-07-07 1994-04-21 Rheinmetall Gmbh Axial einstellbarer Waffenrohr-Bodenring
US5487232A (en) * 1994-04-26 1996-01-30 The Marlin Firearms Company Detonator assembly

Also Published As

Publication number Publication date
DE69511667T2 (de) 1999-12-16
DE69511667D1 (de) 1999-09-30
FR2728064B1 (de) 1997-02-21
ATE183820T1 (de) 1999-09-15
EP0717253A1 (de) 1996-06-19
FR2728064A1 (fr) 1996-06-14
US5777256A (en) 1998-07-07

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