EP0313856B1 - Dispositif pour refroidir la paroi intérieur d'un tube de canon - Google Patents

Dispositif pour refroidir la paroi intérieur d'un tube de canon Download PDF

Info

Publication number
EP0313856B1
EP0313856B1 EP88116172A EP88116172A EP0313856B1 EP 0313856 B1 EP0313856 B1 EP 0313856B1 EP 88116172 A EP88116172 A EP 88116172A EP 88116172 A EP88116172 A EP 88116172A EP 0313856 B1 EP0313856 B1 EP 0313856B1
Authority
EP
European Patent Office
Prior art keywords
piston
cooling
coolant
barrel
cylinder
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
EP88116172A
Other languages
German (de)
English (en)
Other versions
EP0313856A1 (fr
Inventor
Ernst Hürlemann
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.)
Rheinmetall Air Defence AG
Original Assignee
Oerlikon Contraves AG
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 Oerlikon Contraves AG filed Critical Oerlikon Contraves AG
Publication of EP0313856A1 publication Critical patent/EP0313856A1/fr
Application granted granted Critical
Publication of EP0313856B1 publication Critical patent/EP0313856B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F41A13/00—Cooling or heating systems; Blowing-through of gun barrels; Ventilating systems
    • F41A13/04—Injecting fluids into barrels or cartridge chambers

Definitions

  • the invention relates to a device for cooling the inner tube wall of a weapon barrel of a firearm according to the preamble of patent claim 1.
  • a slide which can be actuated by the propellant gas pressure is provided for opening and closing the coolant channel.
  • the slide gas is opened by the propellant gas pressure via a piston and a piston rod, so that coolant can flow through the coolant channel into the interior of the weapon barrel.
  • the injection pressure required to inject the coolant is generated by a coolant pump, not shown.
  • This known device has the disadvantage that an additional coolant pump is required and that it is practically not possible to use such a pump to generate the pressure required to inject the coolant.
  • Another cooling device for the weapon barrel of an automatic firearm and high-performance cannon is known (DE-A1-3145764).
  • This cooling device has in the drum of the weapon radially branched from a cooling channel in the drum axis cooling channels which are connected to nozzles which open freely into the rear end of the weapon barrel.
  • the control of the The injection process takes place depending on the drum rotation, through shut-off devices inserted into the cooling channels, such as slides or valves with valve lifters and valve disks.
  • shut-off devices inserted into the cooling channels, such as slides or valves with valve lifters and valve disks.
  • the cooling liquid is only injected while the nozzles slide past the gun barrel, the coolant being sprayed directly onto the surface of the barrel of the gun barrel.
  • This known cooling device has the disadvantage that it can only be used with a firearm with a drum and can only inject cooling liquid for a very short time.
  • An air cooling device is known (see CH-A-221'036), in which cooling channels are provided in movable closure parts. These channels open on the one hand into a chamber arranged behind the breech and on the other hand against the cartridge chamber in the barrel, these channels having the smallest cross section at the mouth directed against the cartridge chamber.
  • This latter cooling device for the weapon barrel of a firearm has the disadvantage that it is more suitable for air cooling than for liquid cooling and the air can only dissipate relatively little heat.
  • a tube cooling device is known (see FR-A-1'112'677), in which a piston in a cylinder is displaced by the return of the weapon barrel relative to the carriage and a certain amount of coolant is thereby injected into the interior of the weapon barrel.
  • This device has the disadvantage that it cannot be used with certain weapons.
  • US-A-1 401 667 and US-A-2 806 409 describe devices for cooling a weapon barrel, in which a metered amount of coolant is introduced into the interior of a cooling jacket arranged around the weapon barrel due to the forward or return closure by a piston is pumped in.
  • the object that is to be achieved with the present invention is to provide a cooling device for the weapon barrel of a firearm, which is suitable for various weapons, does not require any special control elements, generates a high coolant pressure and ensures high heat dissipation on the inner barrel wall .
  • such a cooling device is characterized by patent claim 1.
  • the main advantages are that the two pistons (differential pistons) generate the high coolant injection pressure required.
  • FIG. 1 An embodiment of the cooling device according to the invention for the weapon barrel of a firearm is described in detail below with reference to the accompanying drawing.
  • the single figure shows a longitudinal section through a weapon barrel with a device for injecting coolant into the interior of the weapon barrel.
  • the rear end 10 of a weapon barrel 11 has a cartridge chamber 12 which is located behind the inner tube wall 13, which is also referred to as a barrel core.
  • a cartridge 14 which consists of a cartridge case 15 and a projectile 16.
  • the cartridge case 15 has a sleeve neck 18 in front of its shoulder 17, in which the projectile 16 is held.
  • the shape of the cartridge chamber 12 corresponds to the shape of the cartridge case 15, such that the shoulder 17 of the cartridge case 15 bears against a conical section 19 of the cartridge chamber 12.
  • At least one coolant channel 23, which is located in the tube wall 26, opens into the tube inner wall 13 in front of the sleeve neck 18.
  • a housing 27 is fastened to this tube wall 26 by means of screws 25.
  • this housing 27 there is the device according to the invention for injecting coolant into the interior of the pipe 13 through the coolant channel 23 mentioned.
  • This housing 27 has three bores 28, 29 and 30 through which the coolant enters the coolant channel 23.
  • a first check valve 31 is connected to the bore 30 connected, which has a ball 32 which is loaded by a spring 33.
  • This check valve 31 prevents coolant from flowing back through the pressure of the propellant gases inside the weapon barrel 11 through the coolant channel 23 and the bores 28, 29 and 30.
  • a second check valve 34 is arranged, which has a ball 35 which is loaded by a spring 36.
  • This second check valve 34 prevents coolant from flowing back into a coolant reservoir 37 when the coolant is injected into the interior of the pipe 13 through the bores 30, 29 and 28, through the injection pump described below, which is also described below.
  • a first cylinder 38 is screwed into the housing 27 and has an external thread 39 which is screwed into a threaded bore 40 of the housing 27.
  • this cylinder 38 there is a piston 41 which is fastened to a piston rod 42 which has a head 43.
  • a spring 44 which is supported on the one hand on a screw head 45 of the cylinder 38 and on the other hand on the piston rod head 43, tends to pull the piston 41 out of the cylinder 38.
  • the piston rod head 43 is supported on a second cylinder 46 which is fastened to the weapon barrel 11 with the aid of a carrier 47. This support 47 is shrunk onto the weapon barrel 11 and has two bores 48 and 49 which open into corresponding gas extraction channels 50 and 51 of the weapon barrel 11.
  • the other gas extraction channel 50 is used to supply propellant gas to the cooling device of the weapon barrel.
  • the propellant gas passes from the tube interior 13 through the gas extraction channel 50, the bore 48 of the Carrier 47 in a bore 52 at the front end of the second cylinder 46, and from this bore 52 into the interior 53 of the cylinder 46.
  • Inside the cylinder 46 there is a piston 54 which is attached to a piston rod 55 which is on the mentioned head 43 of the other piston rod 42 supports.
  • the piston rod 55 is surrounded by a number of spring washers 56 which form an annular spring assembly which serves to catch the piston 54 when it is suddenly pushed backwards by the propellant gases, as seen in the firing direction of the weapon.
  • the coolant container 37 there is a displaceable piston 57, to which a piston rod 58 is fastened, which penetrates a cover 59 of the container 37.
  • This piston rod 58 is surrounded by one or two coil springs 60, 61, which are supported on the one hand on the piston 57 and on the other hand on the cover 59 and have the endeavor to press the piston 57 against the coolant in the space 62, as a result of which the latter is forced out of the space 62 enters a bore 63 and via the check valve 34 into the chamber 64 of the cylinder 41.
  • the coolant container 37 has an external thread 65 which is screwed into an internal thread 66 of the housing 27. Furthermore, a line 67 is screwed into the housing 27, through which cooling liquid can also get into the bore 63.
  • This coolant is in a container, not shown, and is under atmospheric pressure.
  • the operation of the described device for cooling the barrel of a firearm is as follows: When the cartridge 14 is fired, a propellant gas pressure forms inside the weapon barrel 11 behind this cartridge 14. If the propellant gas should penetrate into the coolant channel 23 and the bores 28, 29 and 30, the check valve 31 prevents propellant gas from entering the Chamber 64 of the cylinder 38 arrives. As soon as the projectile 16 is in front of the gas extraction channel 50, the propellant gas flows through this gas extraction channel 50, through the bore 48 of the carrier 47, through the bore 52 of the cylinder 46 and reaches the interior 53 of the cylinder 46.
  • the piston 54 As soon as propellant gas enters the interior 53 of the cylinder 46 arrives, the piston 54, viewed in the firing direction of the weapon, is pushed backwards and abuts against the ring spring assembly consisting of the spring rings 56, which catches the piston 54 and destroys a large part of the energy which the propellant gas transmits to the piston 54 Has.
  • the piston 54 abuts with the piston rod 55 against the head 43 of the piston rod 42, so that the piston 41 attached to the piston rod 42, also seen in the firing direction of the weapon, is pushed backwards.
  • a number of channels can be distributed uniformly around the circumference of the weapon barrel.
  • a further ring of Coolant channels 23 may be arranged, which are not shown in the drawing.
  • coolant for example compressed air
  • coolant can also be used instead of coolant.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Claims (4)

  1. Dispositif pour refroidir la paroi intérieure (13) d'un tube (11) de canon d'une arme à feu comportant un dispositif prévu sur le canon (11), actionné par la pression du gaz propulseur, et comportant des moyens pour doser l'alimentation en fluide de refroidissement, et au moins un canal à fluide de refroidissement (23) réalisé dans la paroi (26) du tube du canon et débouchant dans la paroi intérieure (13), pour injecter du liquide de refroidissement à l'intérieur de la partie arrière du tube (11) du canon, dispositif caractérisé en ce que le dispositif actionné par la pression du gaz de propulsion se compose d'un dispositif à piston formé de deux pistons (41) et (54) de diamètres différents et coopérants, le piston (54) de plus grand diamètre étant soumis à l'action du gaz propulseur et le piston (41) de plus petit diamètre étant soumis à l'action du liquide de refroidissement, pour être déplacé par la pression du gaz et engendrer la pression d'injection servant à doser la quantité de liquide de refroidissement à injecter.
  2. Dispositif selon la revendication 1, caractérisé par un paquet d'anneaux à ressort (56) pour freiner le piston (54) de plus grand diamètre et un ressort hélicoïdal (44) pour rappeler les deux pistons (41, 54) dans leur position de repos.
  3. Dispositif selon la revendication 2, caractérisé en ce qu'un premier boîtier (27) avec un premier cylindre (38) pour recevoir le piston (41) de plus petit diamètre est fixé sur le tube (11) du canon, et un support (47) est prévu avec un second cylindre (46) pour recevoir le piston (54) de plus grand diamètre.
  4. Dispositif selon la revendication 1, caractérisé par un réservoir à liquide de refroidissement (37) dans lequel le liquide de refroidissement est mis sous pression par l'intermédiaire d'un piston (57) et d'un ressort (60, 61).
EP88116172A 1987-10-28 1988-09-30 Dispositif pour refroidir la paroi intérieur d'un tube de canon Expired - Lifetime EP0313856B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH422287 1987-10-28
CH4222/87 1987-10-28

Publications (2)

Publication Number Publication Date
EP0313856A1 EP0313856A1 (fr) 1989-05-03
EP0313856B1 true EP0313856B1 (fr) 1992-02-26

Family

ID=4272077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116172A Expired - Lifetime EP0313856B1 (fr) 1987-10-28 1988-09-30 Dispositif pour refroidir la paroi intérieur d'un tube de canon

Country Status (3)

Country Link
US (1) US4884490A (fr)
EP (1) EP0313856B1 (fr)
DE (1) DE3868584D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022542C2 (de) * 1990-07-16 1994-03-24 Rheinmetall Gmbh Sprühvorrichtung zum Kühlen des Ladungsraums im Bereich der maximalen Ladungsraumtemperatur
ATE224528T1 (de) 1998-07-14 2002-10-15 Contraves Ag Verfahren und vorrichtung zur kühlung von waffenrohren für feuerwaffen
DE19842542C2 (de) * 1998-09-17 2001-09-20 Rheinmetall W & M Gmbh Kühlvorrichtung zur verschlußseitigen Zuführung eines Kühlmediums
IL149590A0 (en) * 1999-07-05 2002-11-10 Founders Ind Pte Ltd Artillery firing mechanism
US6591732B2 (en) 1999-07-14 2003-07-15 Oerlikon Conatraves Ag Method and device for cooling gun barrels of firearms
US6679156B1 (en) 2002-03-18 2004-01-20 Samir A. Danou Weapon with rotating barrel
RU2466339C1 (ru) * 2011-05-13 2012-11-10 Учреждение Российской академии наук Институт прикладной механики Уральского отделения РАН Устройство охлаждения артиллерийских и стрелковых стволов
RU2541022C2 (ru) * 2013-01-14 2015-02-10 Виталий Алексеевич Алтунин Способ заправки воздушных баллонов запуска дизельных двигателей воздухом

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE208692C (fr) *
US682230A (en) * 1901-03-16 1901-09-10 Giuseppe Perino Machine-gun.
DE154459C (fr) * 1904-04-02
US1401667A (en) * 1918-08-22 1921-12-27 Charles W Brown Machine-gun
BE440265A (fr) * 1940-01-09
US2641162A (en) * 1942-02-04 1953-06-09 Us Sec War Gun barrel cooling means
US2774281A (en) * 1945-09-19 1956-12-18 Purdue University Injector pump for breech cooling of guns
US2806409A (en) * 1951-05-29 1957-09-17 William P Purcella Cooling mechanism for machine guns and the like
FR1112677A (fr) * 1952-07-08 1956-03-16 Perfectionnement aux armes à feu
DE6606396U (de) * 1965-12-23 1970-09-17 Breda Mecc Bresciana Geschuetz, insbesondere schnellfeuergeschuetz, maschinenkanone u. dgl. mit kuehlvorrichtung fuer den lauf bzw. das rohr.
DE3145764C2 (de) * 1981-11-19 1983-12-29 Diehl GmbH & Co, 8500 Nürnberg Kühleinrichtung für Waffenrohre von Feuerwaffen

Also Published As

Publication number Publication date
EP0313856A1 (fr) 1989-05-03
US4884490A (en) 1989-12-05
DE3868584D1 (de) 1992-04-02

Similar Documents

Publication Publication Date Title
DE69127507T2 (de) Luftdruckwaffe mit Gasfeder
EP0055691B1 (fr) Arme à feu automatique fonctionnant par l'action de gaz
DE4419680C1 (de) Gas- oder luftbeaufschlagte Schußwaffe
DE1158875B (de) Schusswaffe mit einem zweiteiligen Zylinderverschluss
DE1163609B (de) Doppelschub-Raketenstrahltriebwerk
DE2725896A1 (de) Geschuetz mit fluessigem treibmittel
EP0313856B1 (fr) Dispositif pour refroidir la paroi intérieur d'un tube de canon
DE2215398B2 (de) Lafettiertes Mehrrohrgeschütz
DE1578372C3 (de) Steuervorrichtung zur Entriegelung des Verschlusses einer Gasdrucklader-Feuerwaffe
DE2252267A1 (de) Injektionsventil ohne fluessigkeitsverlust
EP0973003B1 (fr) Procédé et dispositif pour le refroidissement des tubes de canon
DE2647899C2 (de) Gasdruckbetätigte Schußwaffe
DE19842542A1 (de) Kühlvorrichtung zur verschlußseitigen Zuführung eines Kühlmediums
DE533173C (de) Brennstoffeinspritzvorrichtung fuer Brennkraftmaschinen
DE695584C (de) Maschinenwaffe mit beweglichem Lauf
AT357445B (de) Uebungspatrone fuer automatische waffen
DE1094631B (de) Mit Druckgas betriebene Schiessvorrichtung
AT388613B (de) Einrichtung zur kompensation der hochschlagund rueckstossenergie von faustfeuerwaffen
DE3720297C1 (en) Differential piston for weapons - uses ring piston coaxial to barrel and enclosing valve member
EP0269560A1 (fr) Installation d'accélération pour le chargement d'un canon
EP0353398B1 (fr) Dispositif pour bloquer le mécanisme de retour en batterie
WO2021222950A1 (fr) Système de culasse à commande par pression de gaz pour une arme à feu
DE102016121070B4 (de) Verstellbare Gasabnahmeanordnung für eine Gasdrucklader-Schusswaffe
DE4009050A1 (de) Automatische rohrwaffe
DE3720296C1 (en) Liq. propellant weapon system - has piston with central recess accommodating cylindrical insert with valve

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19890520

17Q First examination report despatched

Effective date: 19900905

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: OERLIKON-CONTRAVES AG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI SE

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
REF Corresponds to:

Ref document number: 3868584

Country of ref document: DE

Date of ref document: 19920402

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 88116172.3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950803

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19950814

Year of fee payment: 8

Ref country code: CH

Payment date: 19950814

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950815

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950823

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19960930

Ref country code: GB

Effective date: 19960930

Ref country code: FR

Effective date: 19960930

Ref country code: CH

Effective date: 19960930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19961001

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970603

EUG Se: european patent has lapsed

Ref document number: 88116172.3

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050930