EP0717253A1 - Abdichtung einer Feuerwaffe für hülsenlose Munition - Google Patents

Abdichtung einer Feuerwaffe für hülsenlose Munition Download PDF

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Publication number
EP0717253A1
EP0717253A1 EP95402532A EP95402532A EP0717253A1 EP 0717253 A1 EP0717253 A1 EP 0717253A1 EP 95402532 A EP95402532 A EP 95402532A EP 95402532 A EP95402532 A EP 95402532A EP 0717253 A1 EP0717253 A1 EP 0717253A1
Authority
EP
European Patent Office
Prior art keywords
seal
barrel
sealing
sealing device
cooling part
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
EP95402532A
Other languages
English (en)
French (fr)
Other versions
EP0717253B1 (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 of small caliber portable weapons firing ammunition without a cartridge case.
  • 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 heating for bursts of ammunition of the order of 150 in one minute.
  • the seal is fixed floatingly between the barrel and the cylinder head so as to be able to move axially under the action of the pressure of the combustion gases.
  • the cooling part of the seal is of annular shape, coaxial outside the sealing part of the seal 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 joint is such that, on the barrel side, the sealing part, the cooling part and the connecting wall of the joint delimit a cavity therebetween decompression of combustion gases.
  • 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 seal.
  • the cooling part of the seal 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 means of connection being for example a screw, the head of which is blocked by the cylinder head and whose rod engages in the aforementioned opening.
  • the two sealing and cooling parts which form the joint form a single piece which is produced from spring steel, for example.
  • An advantage of the sealing device according to the invention lies in the fact that the sealing is ensured by a device in one piece facilitating its manufacture and its mounting in the weapon and consequently its replacement in the event of deterioration.
  • Another advantage lies in the use of the pressure of the combustion gases to ensure the displacement of the sealing device and its deformation.
  • the weapon 1 partially shown in longitudinal section in FIG. 1 comprises a barrel aligned with the breech 3 in the chamber 3a of which is housed an ammunition 4 without casing consisting of a propellant charge 5 and a projectile 6 engaged in the cannon.
  • the ammunition 4 is ignited using an electric initiation device or percussion device.
  • the barrel 2 and the breech 3 are fixed to each other by means of a breech lock 8.
  • the breech 3 is subjected to the action of a recovery spring 9 which applies an axial force F to the cylinder head 3
  • the cooling part 15 of the seal 11 is of annular shape, coaxial outside with the sealing part 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, the cooling part 15 and the connecting wall 16 define between them a cavity 17 for decompressing the combustion gases.
  • the cooling part 15 extends on the same side of the connecting wall 16 and in the direction of the barrel 2.
  • the seal 11 is made of an elastically deformable material having high thermomechanical properties and a wide range of operating temperatures, between ⁇ 50 ° and 450 °, this material being for example 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 decompression cavity has a width of the order of 2.5 mm.
  • the cooling part 15 extends axially over a length greater than that of the sealing part 12, so as to allow the cooling of the seal 11 by limiting the heating of the sealing part 12 which is directly in contact combustion gases, so that its temperature remains below the tempering temperature of the steel constituting it.
  • the cooling part 15 of the seal 11 is intended to be housed in an annular space 18 delimited between the rear part of the barrel 2 and the breech 3.
  • the seal 11 is intended to be mounted preserred between the barrel 2 and the cylinder head 3 on the one hand, and fixed so as to be able to move axially under the action of the combustion gases.
  • the floating mounting of the seal 11 makes it possible to guarantee its positioning between the barrel 2 and the cylinder head 3 during the pressure build-up in the chamber 3a.
  • the seal 11 is fixed to the cylinder head 3 by at least one connecting means 20 freely engaging inside an oblong opening 22 formed in the wall of the cooling part 15 of the seal 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. It is possible, for example, to provide three screws 20 regularly distributed around the cooling part 15 of the seal 11.
  • the seal 11 is mounted pre-locked between the barrel 2 and the cylinder head 3 by the action of the recuperator 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 sealing lip 14 and the internal wall of the 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 the 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)
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
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 true EP0717253A1 (de) 1996-06-19
EP0717253B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2862377A1 (fr) * 2003-11-14 2005-05-20 Philippe Courty Systeme d'etancheite de chambre pour munitions sans etuis
EP2639252A1 (de) 2012-03-14 2013-09-18 Sika Technology AG Neue Reaktivpolymerkatalysatoren für 2K-Epoxidharzsysteme

Families Citing this family (10)

* 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
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
US10030956B2 (en) 2012-09-28 2018-07-24 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
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
USD849874S1 (en) 2018-01-21 2019-05-28 Vista Outdoor Operations Llc Muzzleloader propellant cartridge

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB687826A (en) * 1950-08-23 1953-02-18 Oerlikon Buehrle Ag Cartridge chamber seals for automatic firearms
FR1157474A (fr) * 1956-08-24 1958-05-29 France Etat Perfectionnements aux dispositifs d'étanchéité pour armes automatiques
US3159938A (en) * 1962-07-27 1964-12-08 Jr John W Treat Gas seal for rotatable cartridge drum
US3762328A (en) * 1969-01-15 1973-10-02 Maremont Corp Caseless ammunition and gun therefor
US3799560A (en) * 1971-03-04 1974-03-26 Gen Electric Firearm chamber seal
EP0251902A1 (de) * 1986-06-25 1988-01-07 ETAT-FRANCAIS représenté par le DELEGUE GENERAL POUR L'ARMEMENT (DPAG) Abdichtung zwischen Rohr und Verschluss an Kanonen
GB2233747A (en) * 1989-07-07 1991-01-16 Rheinmetall Gmbh Gun barrel base ring.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3006254A (en) * 1960-02-17 1961-10-31 Robert J Thierry Self-energizing breech seal for guns
US3626620A (en) * 1969-01-15 1971-12-14 Maremont Corp Gun having a floating firing chamber
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
DE2435520C3 (de) * 1974-07-24 1979-11-15 Diehl Gmbh & Co, 8500 Nuernberg Verschlußdichtung für großkalibrige Waffen
US5487232A (en) * 1994-04-26 1996-01-30 The Marlin Firearms Company Detonator assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB687826A (en) * 1950-08-23 1953-02-18 Oerlikon Buehrle Ag Cartridge chamber seals for automatic firearms
FR1157474A (fr) * 1956-08-24 1958-05-29 France Etat Perfectionnements aux dispositifs d'étanchéité pour armes automatiques
US3159938A (en) * 1962-07-27 1964-12-08 Jr John W Treat Gas seal for rotatable cartridge drum
US3762328A (en) * 1969-01-15 1973-10-02 Maremont Corp Caseless ammunition and gun therefor
US3799560A (en) * 1971-03-04 1974-03-26 Gen Electric Firearm chamber seal
EP0251902A1 (de) * 1986-06-25 1988-01-07 ETAT-FRANCAIS représenté par le DELEGUE GENERAL POUR L'ARMEMENT (DPAG) Abdichtung zwischen Rohr und Verschluss an Kanonen
GB2233747A (en) * 1989-07-07 1991-01-16 Rheinmetall Gmbh Gun barrel base ring.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2862377A1 (fr) * 2003-11-14 2005-05-20 Philippe Courty Systeme d'etancheite de chambre pour munitions sans etuis
EP2639252A1 (de) 2012-03-14 2013-09-18 Sika Technology AG Neue Reaktivpolymerkatalysatoren für 2K-Epoxidharzsysteme

Also Published As

Publication number Publication date
ATE183820T1 (de) 1999-09-15
FR2728064A1 (fr) 1996-06-14
US5777256A (en) 1998-07-07
FR2728064B1 (de) 1997-02-21
DE69511667D1 (de) 1999-09-30
DE69511667T2 (de) 1999-12-16
EP0717253B1 (de) 1999-08-25

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