EP0532721A1 - Revolver mortar. - Google Patents
Revolver mortar.Info
- Publication number
- EP0532721A1 EP0532721A1 EP92905836A EP92905836A EP0532721A1 EP 0532721 A1 EP0532721 A1 EP 0532721A1 EP 92905836 A EP92905836 A EP 92905836A EP 92905836 A EP92905836 A EP 92905836A EP 0532721 A1 EP0532721 A1 EP 0532721A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- joint
- bore
- ammunition
- seal
- mortar according
- 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
Links
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
- F41A3/76—Obturating or packing devices for gas leak prevention in breech mechanisms specially adapted for sealing the gap between the forward end of the cartridge chamber and the rearward end of the barrel, e.g. sealing devices for revolvers or revolver-type guns
-
- 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
-
- 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
- F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
- F41A9/01—Feeding of unbelted ammunition
- F41A9/24—Feeding of unbelted ammunition using a movable magazine or clip as feeding element
- F41A9/26—Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine
- F41A9/27—Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine in revolver-type guns
Definitions
- the invention relates to a barrel mortar, of the type in which a barrel tube is associated with an ammunition barrel mounted for rotation about an axis parallel to the axis of the tube and comprising several cylindrical casings for receiving ammunition , open at their front and rear ends and each of which is brought by rotation of the barrel to a shooting station in which it is aligned with the tube, its rear end then being supported on a shooting plate comprising setting means ammunition fire.
- Mortars of this type are generally fitted to armored vehicles and allow a relatively high rate of fire, thanks to the barrels whose sleeves can easily be recharged with ammunition during the shots, and which also allow rapid rapid fire in bursts. when all the sleeves of a barrel have been previously loaded.
- each liner comprises at its rear end means with elastic deformation, forming a support stop and for positioning the munition introduced into the shirt by the front end thereof and also ensuring a gas tightness when fired, in relation to the jacket and the firing plate.
- these means consist of a metal seal of generally cylindrical shape with open front end and rear end comprising an annular bottom wall with central orifice, this seal being mounted in a bore from the rear end of the liner and retained in this bore by means such as, for example, a screw nut.
- This cylindrical seal is slidably mounted without radial clearance in the bore of the liner and has a rectified external cylindrical surface whose diameter is equal to the diameter of the bore of the liner.
- the internal surface of the seal is cylindrical with a circular section in the vicinity of the bottom wall, with a diameter ensuring the centering of the muni ⁇ tion, and is frustoconical at its front part, l wall thickness of the joint decreasing towards its front end.
- This frustoconical internal surface has the function of facilitating the loading and positioning of the ammunition in the liner, and also of facilitating the elastic deformation of the corresponding part of the seal, which rests on the bore of the liner for as ⁇ secure sealing, under the effect of gas pressure during a shot.
- the external surface of the bottom wall of the joint is slightly frustoconical, its small base forming the aforementioned central orifice and being projecting from the bottom of the joint.
- the internal surface of the bottom wall of the joint comprises an annular part situated in a plane perpendicular to the axis of the joint and connected to the internal cylindrical surface of the joint, to form a bearing face of the base of the munition, and a frustoconical part extending to the central orifice of the bottom part, the thickness of this wall decreasing in the direction of the axis.
- the bottom of the seal is capable of withstanding the shock of an ammunition loaded by the front end of the shirt and falling by gravity into this shirt, and is also capable of deforming eiastically to apply pressure on the firing plate and assu ⁇ rer gas tightness during a shot.
- FIG. 1 is a view schematic in axial section of a jacket comprising a metal seal according to the invention
- Figure 1A is an enlarged view of the circled detail I in Figure 1
- Figure 2 is a view similar to Figure 1, but shows the shirt in the firing position.
- the joint according to the invention is particularly intended for use in an 81 mm rapid-fire mortar, such as that which has been developed by the depo ⁇ health to equip light armored vehicles.
- a mortar is well known and its general structure has therefore not been shown.
- the mortar barrel comprises five liners, such as that shown diagrammatically in FIG. 1 and designated by the reference 10, which are of cylindrical general shape with circular section and whose front ends 12 and rear ends 14 are open.
- each jacket 10 comprises, in the embodiment shown in the drawings, three successive bores 16, 18 and 20, of progressively decreasing diameter, which are used for receiving and maintaining a metal seal 22 according to the invention.
- the bore 16 of larger diameter of the rear portion of the jacket 10 has an internal surface file and receives a nut 24 for retaining the seal 22 in the jacket.
- the second bore 18, of short length, is intended to receive an annular rim 26 projecting from the cylindrical external surface of the seal 22, while the third bore 20 constitutes the actual housing of the seal 22.
- the seal 22 is made of spring steel and is of generally cylindrical shape, with an open front end 28 and a rear end comprising an annular bottom wall 30 with a central opening 32.
- the external cylindrical surface 34 of the seal has an equal diameter to that of the bore 20 of the jacket 10, and is rectified, as well as the surface of the bore, to allow sliding without play of the seal in the bore 20.
- the corresponding internal surface of the seal comprises a cylindrical part 36 of circular section, connected to the bottom wall 30 of the seal and having a diameter equal to the internal diameter of the jacket 10 beyond the bore 20, and also comprises a frusto-conical part 38, extending the cylindrical part 36 to the front end 28 of the joint and widening towards this end, so that the wall thickness of the joint decreases towards its front end.
- the angle at the top of this frustoconical part 38 is not very pronounced, and is 8.degree. In the preferred embodiment of the invention.
- the bottom wall 30 of the joint has a tapered external surface 40 with a very flat apex angle (of 179.26 * in the preferred embodiment of the invention) and oriented towards the outside so that the edge of the central orifice 32 is slightly sail ⁇ outward.
- the internal surface of this bottom wall 30 comprises an annular part 42 perpendicular to the axis of symmetry of the joint, extended to the central orifice 32 by a frustoconical part 44 having a smaller angle at the apex than that of the frustoconical outer surface 40 (for example 172 * in the preferred embodiment of the invention), so that the thickness of the bottom wall 30 decreases gradually in the direction of the axis of symmetry of the joint.
- the seal also includes an annular rim 26 projecting from its external surface, in the vicinity of its rear end.
- annular rim 26 projecting from its external surface, in the vicinity of its rear end.
- the operation is as follows: in the loading position, which corresponds to that shown in FIG. 1, the jacket is inclined obliquely to the horizontal, and is loaded with a conventional mortar ammunition, of which only the rear end comprising a tail 46 is shown in FIG. 1.
- the ammunition is introduced through the front end of the sleeve 12 and falls by gravity into the sleeve on the metal seal 22.
- the centering of the ammunition is ensured by the cylindrical part 36 of the internal surface of the joint 22, and its support by the annular surface 42 of the bottom 30.
- the joint 22 is supported by its annular rim 26 on the retaining nut 24.
- the jacket 10 containing the ammunition is brought into the firing position, shown schematically in FIG. 2 in which it is aligned with the tube 48 of the mortar and is supported at its rear end on a plate firing 50 compre ⁇ nant in a bore 52 of the means, not shown, for firing the ammunition.
- the sliding mounting of the seal 22 in the jacket 10 makes it possible to automatically adjust the position of the seal 22, the bottom wall 30 of which is in elastic support on the firing plate 50, under the effect of the weight of the ammunition, the central orifice 32 of this bottom wall being aligned with the bore 52 of the firing plate 50 and having a diameter greater than that of the bore. A seal between the jacket and the firing plate 50 is thus ensured as soon as the jacket 10 is in the firing position.
- the seal according to the invention ensures very good gas tightness when firing ammunition and makes it possible, by its elastic preload on the shooting plate, to compensate for the dispersions of the dimensions of the shirts .
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Gasket Seals (AREA)
- Furnace Details (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Mortier à tir rapide, comprenant un barillet à munitions dont les chemises (10) sont munies, à leur extrémité arrière, d'un joint métallique (22) dont le fond (30) forme un support de la munition, le joint étant monté glissant dans la chemise pour compenser les dispersions de cotes des chemises et ayant des parois élastiquement déformables sous l'effet de la pression des gaz lors du tir pour assurer l'étanchéité aux gaz entre la chemise et une plaque de tir.Rapid-fire mortar, comprising an ammunition barrel, the liners (10) of which are fitted, at their rear end, with a metal seal (22), the bottom (30) of which forms a support for the ammunition, the seal being slidably mounted in the jacket to compensate for the dimensional dispersions of the shirts and having elastically deformable walls under the effect of the gas pressure during firing to ensure the gas tightness between the shirt and a firing plate.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9104117 | 1991-04-04 | ||
FR9104117A FR2674950B1 (en) | 1991-04-04 | 1991-04-04 | BARREL MORTAR. |
PCT/FR1992/000114 WO1992017746A1 (en) | 1991-04-04 | 1992-02-10 | Revolver mortar |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0532721A1 true EP0532721A1 (en) | 1993-03-24 |
EP0532721B1 EP0532721B1 (en) | 1996-12-27 |
Family
ID=9411481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92905836A Expired - Lifetime EP0532721B1 (en) | 1991-04-04 | 1992-02-10 | Revolver mortar |
Country Status (7)
Country | Link |
---|---|
US (1) | US5305679A (en) |
EP (1) | EP0532721B1 (en) |
CA (1) | CA2084520A1 (en) |
DE (1) | DE69216182T2 (en) |
FR (1) | FR2674950B1 (en) |
IL (1) | IL101299A (en) |
WO (1) | WO1992017746A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT403622B (en) * | 1994-03-25 | 1998-04-27 | Intertechnik Tech Prod | LOCKING DEVICE FOR A PISTON FIREARM |
DE10213928A1 (en) * | 2002-03-28 | 2003-10-09 | Rheinmetall W & M Gmbh | mortar tube |
US7207257B2 (en) * | 2005-03-08 | 2007-04-24 | Meggitt Defense Systems, Inc. | Ammunition guide |
DE102005020669A1 (en) * | 2005-05-03 | 2006-11-09 | Diehl Bgt Defence Gmbh & Co. Kg | Seal, in particular for caseless ammunition |
US7963202B1 (en) * | 2005-09-21 | 2011-06-21 | The United States Of America As Represented By The Secretary Of The Army | Superalloy mortar tube |
US8261478B2 (en) | 2005-12-21 | 2012-09-11 | Smith & Wesson Corp. | Muzzle loading rifle with removable breech plug |
US7814694B2 (en) | 2006-01-17 | 2010-10-19 | Thompson Center Arms Company, Inc. | Muzzle loading rifle with breech plug having gas seal facility |
FI20085623L (en) * | 2008-06-19 | 2009-12-20 | Patria Land & Armament Oy | Firearm, device for loading a firearm and method for sealing a firearm |
DE102013005378B3 (en) | 2013-03-28 | 2014-10-02 | Rheinmetall Waffe Munition Gmbh | Launcher for firing cartridged ammunition |
CN112504007B (en) * | 2020-11-27 | 2022-08-16 | 河北燕兴机械有限公司 | Latch body gas-closing structure for recoilless gun |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL82053C (en) * | 1950-08-23 | |||
DE1287973B (en) * | 1965-07-21 | 1969-01-23 | Rheinmetall GmbH. 4000 Düsseldorf | Device on gun barrels with ring lids arranged in the tube sheet |
FR1487089A (en) * | 1965-07-21 | 1967-06-30 | Rheinmetall Gmbh | Improvements to barrel tubes fitted with a shutter ring |
DE1578046A1 (en) * | 1966-12-14 | 1970-10-15 | Rheinmetall Gmbh | Wedge lock for guns with exchangeable ring lid |
US3783737A (en) * | 1972-02-04 | 1974-01-08 | Gen Electric | Seal |
FR2479442A1 (en) * | 1980-03-26 | 1981-10-02 | France Etat | MORTAR QUICK FIRE |
DE3404676A1 (en) * | 1984-02-10 | 1985-08-14 | Rheinmetall GmbH, 4000 Düsseldorf | RING LIDING ON GUNS |
IT1190066B (en) * | 1986-02-28 | 1988-02-10 | Fiocchi Spa Giulio | WEAPON WITH PERFECTED SHUTTER, FOR AMMUNITION WITHOUT CAPS |
DE3922334C2 (en) * | 1989-07-07 | 1994-04-21 | Rheinmetall Gmbh | Axially adjustable gun barrel bottom ring |
DE4006215A1 (en) * | 1990-02-28 | 1991-09-05 | Rheinmetall Gmbh | LIDING RING ARRANGEMENT |
-
1991
- 1991-04-04 FR FR9104117A patent/FR2674950B1/en not_active Expired - Fee Related
-
1992
- 1992-02-10 DE DE69216182T patent/DE69216182T2/en not_active Expired - Fee Related
- 1992-02-10 EP EP92905836A patent/EP0532721B1/en not_active Expired - Lifetime
- 1992-02-10 WO PCT/FR1992/000114 patent/WO1992017746A1/en active IP Right Grant
- 1992-02-10 US US07/941,148 patent/US5305679A/en not_active Expired - Fee Related
- 1992-02-10 CA CA002084520A patent/CA2084520A1/en not_active Abandoned
- 1992-03-19 IL IL10129992A patent/IL101299A/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9217746A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2674950B1 (en) | 1993-06-11 |
FR2674950A1 (en) | 1992-10-09 |
CA2084520A1 (en) | 1992-10-05 |
EP0532721B1 (en) | 1996-12-27 |
IL101299A0 (en) | 1992-11-15 |
WO1992017746A1 (en) | 1992-10-15 |
IL101299A (en) | 1994-10-21 |
DE69216182T2 (en) | 1997-04-17 |
DE69216182D1 (en) | 1997-02-06 |
US5305679A (en) | 1994-04-26 |
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