EP0717253B1 - Dispositif d'étanchéité pour arme à feu à munition sans douille - Google Patents
Dispositif d'étanchéité pour arme à feu à munition sans douille Download PDFInfo
- 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
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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)
- Gasket Seals (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Installation Of Indoor Wiring (AREA)
- Secondary Cells (AREA)
- Measuring Fluid Pressure (AREA)
Description
- la figure 1 est une vue en coupe longitudinale partielle d'une arme,
- la figure 2 est une vue en coupe du dispositif d'étanchéité selon l'invention, et
- les figures 3 à 5 sont des vues en coupe partielle illustrant le fonctionnement.
- une partie étanchéité 12 de forme annulaire, dont une face d'extrémité forme une surface d'étanchéité axiale 13 destinée à venir en appui sur la face arrière 2a du canon 2, et qui comporte vers son autre extrémité une lèvre d'étanchéité radiale 14 destinée à venir en appui sur la paroi interne de la chambre 3a, et
- une partie refroidissement 15 destinée à limiter l'échauffement de la partie étanchéité 12 qui est au contact des gaz de combustion.
- d'assurer un meilleur contact, parfaitement continu entre le joint 11 et le canon 2, et s'affranchir ainsi des imperfections de géométrie,
- d'augmenter la pression de contact entre le joint 11 et le canon 2, et limiter ainsi l'infiltration des gaz dues aux états de surface, et
- de former la cavité de décompression 17 qui fait chuter en pression et en vitesse les fuites éventuelles de gaz et freiner ainsi ces fuites.
Claims (10)
- Dispositif d'étanchéité aux gaz de combustion d'une munition (4) sans douille, monté entre le canon (2) et la chambre (3a) de culasse d'une arme à feu (1) de petit calibre, et comprenant un joint (11) qui est constitué d'une partie étanchéité (12) de forme annulaire, dont une face d'extrémité forme une surface d'étanchéité axiale (13) destinée à venir en appui sur la face arrière (2a) du canon (2), et qui comporte vers son autre extrémité une lèvre d'étanchéité radiale (14) destinée à venir en appui sur la paroi interne de la chambre de culasse (3a), dispositif caractérisé en ce que le joint comprend également une partie refroidissement (15) qui s'étend axialement sur une longueur supérieure à celle de la partie étanchéité (12) pour limiter l'échauffement de celle-ci qui est au contact des gaz de combustion.
- Dispositif d'étanchéité selon la revendication 1, caractérisé en ce que le joint (11) est fixé de manière flottante entre le canon (2) et la culasse (3) de manière à pouvoir se déplacer axialement sous l'action de la pression des gaz de combustion.
- Dispositif d'étanchéité selon la revendication 1 ou 2, caractérisé en ce que la partie refroidissement du joint (11) est de forme annulaire, coaxiale extérieurement à la partie étanchéité (12) du joint et relié à la périphérie de cette dernière par une paroi radiale annulaire (16).
- Dispositif d'étanchéité selon la revendication 3, caractérisé en ce que la position axiale de la paroi de liaison (16) est telle que, côté canon, la partie étanchéité (12), la partie refroidissement (15) et la paroi de liaison (16) du joint délimitent entre elles une cavité de décompression (17) des gaz de combustion.
- Dispositif d'étanchéité selon la revendication 3 ou 4, caractérisé en ce que la partie refroidissement (15) du joint (11) est destinée à se loger dans un espace annulaire (18) délimité entre la partie arrière du canon (2) et la culasse (3).
- Dispositif d'étanchéité selon la revendication 5, caractérisé en ce que la partie refroidissement (15) du joint est fixée à la culasse (3) par au moins un moyen de liaison (20) s'engageant librement à l'intérieur d'une ouverture oblongue (22) ménagée dans la paroi de la partie refroidissement (15) du joint.
- Dispositif d'étanchéité selon la revendication 6, caractérisé en ce que le moyen de liaison (20) est une vis, dont la tête (20a) est bloquée par la culasse (3) et dont la tige (20b) s'engage dans l'ouverture (22) de la partie refroidissement (15) du joint.
- Dispositif d'étanchéité selon l'une quelconque des revendications précédentes, caractérisé en ce que le joint (11) est fabriqué en un matériau élastiquement déformable et ayant des propriétés thermomécaniques élevées.
- Dispositif d'étanchéité selon la revendication 8, caractérisé en ce que le joint (11) est fabriqué en acier à ressort.
- Dispositif d'étanchéité selon la revendication 8 ou 9, caractérisé en ce que le joint (11) est monté préserré entre le canon (2) et la culasse (3).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9414911A FR2728064A1 (fr) | 1994-12-12 | 1994-12-12 | Dispositif d'etancheite pour arme a feu a munition sans douille |
FR9414911 | 1994-12-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0717253A1 EP0717253A1 (fr) | 1996-06-19 |
EP0717253B1 true EP0717253B1 (fr) | 1999-08-25 |
Family
ID=9469697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95402532A Expired - Lifetime EP0717253B1 (fr) | 1994-12-12 | 1995-11-13 | Dispositif d'étanchéité pour arme à feu à munition sans douille |
Country Status (5)
Country | Link |
---|---|
US (1) | US5777256A (fr) |
EP (1) | EP0717253B1 (fr) |
AT (1) | ATE183820T1 (fr) |
DE (1) | DE69511667T2 (fr) |
FR (1) | FR2728064A1 (fr) |
Families Citing this family (12)
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 (fr) | 2012-03-14 | 2013-09-18 | Sika Technology AG | Nouveaux catalyseurs de polymères réactifs pour systèmes de résine époxy 2K |
US9329003B2 (en) | 2012-09-28 | 2016-05-03 | Vista Outdoor Operations Llc | Muzzleloader systems |
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 |
US10030956B2 (en) | 2012-09-28 | 2018-07-24 | Vista Outdoor Operations Llc | Muzzleloader systems |
US9146086B2 (en) | 2012-09-28 | 2015-09-29 | Vista Outdoor Operations Llc | Muzzleloader bullet system |
USD849874S1 (en) | 2018-01-21 | 2019-05-28 | Vista Outdoor Operations Llc | Muzzleloader propellant cartridge |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU31770A1 (fr) * | 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 |
-
1994
- 1994-12-12 FR FR9414911A patent/FR2728064A1/fr active Granted
-
1995
- 1995-11-13 AT AT95402532T patent/ATE183820T1/de not_active IP Right Cessation
- 1995-11-13 EP EP95402532A patent/EP0717253B1/fr not_active Expired - Lifetime
- 1995-11-13 DE DE69511667T patent/DE69511667T2/de not_active Expired - Fee Related
-
1997
- 1997-05-01 US US08/848,752 patent/US5777256A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2728064A1 (fr) | 1996-06-14 |
EP0717253A1 (fr) | 1996-06-19 |
ATE183820T1 (de) | 1999-09-15 |
DE69511667D1 (de) | 1999-09-30 |
US5777256A (en) | 1998-07-07 |
FR2728064B1 (fr) | 1997-02-21 |
DE69511667T2 (de) | 1999-12-16 |
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