EP3372944B1 - Dispositif d'évacuation de gaz et canon équipé d'un tel dispositif ainsi qu'une arme à feu automatique pourvue d'un tel dispositif - Google Patents

Dispositif d'évacuation de gaz et canon équipé d'un tel dispositif ainsi qu'une arme à feu automatique pourvue d'un tel dispositif Download PDF

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Publication number
EP3372944B1
EP3372944B1 EP18160522.1A EP18160522A EP3372944B1 EP 3372944 B1 EP3372944 B1 EP 3372944B1 EP 18160522 A EP18160522 A EP 18160522A EP 3372944 B1 EP3372944 B1 EP 3372944B1
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EP
European Patent Office
Prior art keywords
gas
piston
block
gas block
take
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.)
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Application number
EP18160522.1A
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German (de)
English (en)
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EP3372944A3 (fr
EP3372944A2 (fr
Inventor
Uwe Fleiner
Stefan Doll
Daniel Kohler
Wilhelm Fischbach
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.)
Heckler und Koch GmbH
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Heckler und Koch GmbH
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Publication date
Application filed by Heckler und Koch GmbH filed Critical Heckler und Koch GmbH
Publication of EP3372944A2 publication Critical patent/EP3372944A2/fr
Publication of EP3372944A3 publication Critical patent/EP3372944A3/fr
Application granted granted Critical
Publication of EP3372944B1 publication Critical patent/EP3372944B1/fr
Priority to HRP20201920TT priority Critical patent/HRP20201920T1/hr
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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
    • F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
    • F41A5/18—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated
    • F41A5/26—Arrangements or systems for bleeding the gas from the barrel
    • F41A5/28—Adjustable systems
    • 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
    • F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
    • F41A5/18—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated
    • F41A5/26—Arrangements or systems for bleeding the gas from the barrel

Definitions

  • the present invention relates to a gas take-off according to the preamble of claim 1.
  • the invention also relates to a weapon barrel equipped with such a gas take-off and a self-loading firearm with such a gas take-off.
  • Gas takeoffs for self-loading firearms and weapon barrels equipped with them, as well as self-loading firearms, for example assault rifles, are known in various designs.
  • Gas take-offs are usually mounted on the gun barrel in the front third of a barrel or gun barrel.
  • a gas channel within the gas take-off is brought into fluid connection with a bore in the weapon barrel in order to divert propellant gases released when a shot is fired from the weapon barrel to operate a gas pressure reloading mechanism.
  • the weapon barrel is received and fixed inside a weapon housing in a so-called tube holder.
  • a longitudinally moveable locking arrangement is provided in the weapon housing for firing a shot, pulling out a fired cartridge case and reloading.
  • the functional sequence during firing and automatic reloading can be represented in a simplified manner as follows: To fire the shot, the breech assembly, in particular its breech head, inserts a cartridge from a cartridge feed device in a known manner into a cartridge chamber in the barrel. When a trigger mechanism is actuated, a firing pin strikes the cartridge base and ignites a propellant charge there, so that a projectile is fired from the cartridge case through the barrel. As soon as the projectile passes the bore in the weapon barrel, the propellant gases released during the firing process can be diverted into the gas take-off.
  • the branched-off propellant gases are used to set the closure assembly in a known manner in a backward movement.
  • the propellant gases drive the closure assembly backwards towards the shaft at high speed via the gas take-off and a gas linkage coupled to it.
  • An extractor is provided on the bolt head, which grips around a cartridge case at its edge on the case base and pulls it out of the cartridge chamber when the breech assembly moves backwards.
  • An ejector then pushes the cartridge case out of the weapon housing in a known manner via a cartridge ejection window. As the breech assembly moves forward, a cartridge is again fed to the chamber and the cycle is repeated.
  • U.S. 3,592,101 discloses a gas pressure reloading system for a self-loading firearm. Below a barrel is a gas take-off with a gas cylinder which has a screwed-in insert with a gas passage at its mouth end. A gas piston connected to an inertial mass is inserted in the gas cylinder and penetrates the end of the gas cylinder on the shaft side. A gas passage adjusting mechanism is not described and illustrated.
  • WO 2006/137874 A2 discloses a self-loading firearm with a gas take-off, in whose gas cylinder, which is open towards the end of the barrel, a so-called short-stroke gas piston is inserted which, after firing a shot, transmits an impulse to a bolt carrier via a spring-loaded gas rod.
  • the propellant gas pressure can be regulated via a cylindrical adjustment device or a slide between the pipe bore and gas cylinder with cross bores with different cross-sectional diameters.
  • EP 0 802 388 B1 the applicant discloses a generic gas take-off for a self-loading firearm.
  • a short-stroke gas piston is inserted into a gas cylinder that is open in the direction of the shaft. Outside the gas cylinder, the gas piston has a guide attachment at its shaft end.
  • a gas piston rod - called a push rod there - is inserted in a bore in the receiving area adjoining the guide attachment.
  • the gas piston is provided with a valve pin at its mouth end to vent propellant gases through a nozzle. A gas pressure adjustment is not described.
  • U.S. 2,582,989 A discloses a gas takeoff according to the preamble of claim 1.
  • the object of the present invention is to provide an alternative gas take-off as well as a weapon barrel equipped therewith and a self-loading firearm with such a gas take-off.
  • the generic gas consumption is characterized according to claim i.a. characterized in that a closing element, which has a passage for the gas piston, can be detachably coupled to the end of the gas cylinder facing the weapon shaft.
  • the generic weapon barrel of claim 12 is characterized in that it is provided with a gas tap according to one of claims 1 to 11.
  • the generic self-loading firearm of claim 13 is characterized in that it is provided with a gas tap according to one of claims 1 to 11.
  • the gas take-off can be provided for various self-loading firearms, for example for a machine gun, sniper rifle or an assault rifle.
  • the gas take-off is designed to drive a closure arrangement, in particular via a gas linkage.
  • the interior of the assembly section of the gas take-off comprises a cylindrical recess with dimensions complementary to the weapon barrel.
  • the gas take-off is pushed or placed on the weapon barrel and pinned in its storage position by means of a bore provided in the weapon barrel which extends transversely to its longitudinal direction.
  • the gas channel for supplying the propellant gases from the weapon barrel into the gas take-off can extend perpendicularly or obliquely to the longitudinal direction of the gas take-off. If the gas channel extends obliquely to the longitudinal direction, the gas jet hits the gas piston directly and drives it directly. With a right-angled gas jet, the gas pressure must first build up in the gas cylinder.
  • the gas piston can be provided as a short-stroke gas piston for a so-called indirect gas pressure charging system, as is the case with the generic gas take-off.
  • a short-stroke gas piston is characterized by a short movement path which is sufficient to transmit a corresponding drive pulse to the gas linkage or the closure arrangement.
  • the short-stroke gas piston is not permanently connected to a gas linkage of the closure arrangement.
  • the closing element limits the piston stroke of the short-stroke gas piston.
  • the closing element can be provided as a cover which can be placed on the pipe-side end of the gas cylinder and thus delimits the inner volume of the gas cylinder.
  • the closing element can be provided with an anti-slip surface, for example with gripping ribs or as a sawtooth profile for better grip, especially when operated with gloves or in a damp or dirty environment.
  • the gas take-off can be made of suitable materials, for example metal and its alloys.
  • the gas take-off can be produced, for example, via an injection molding or casting process.
  • the gas removal is advantageously designed by extrusion or extrusion or as an MIM part using a metal powder injection molding process.
  • MIM parts also show hardly any dimensional fluctuations and thus reduce the effort involved in any post-processing.
  • the gas take-off can be adjusted without tools for operation with a silencer and can be equipped with an interface for 40 mm add-on grenade launchers, for example the HK269 grenade launcher. Overall, gas take-off is provided with high precision and dimensional accuracy with low manufacturing tolerances. Any design requirements for gas consumption can also be implemented.
  • the releasable coupling of the terminating element takes place via suitable fastening means in the form of a bayonet connection.
  • the outer dimensions of the gas piston can be designed to be wholly or partially complementary to the inner circumference of the gas cylinder in order to ensure a seal.
  • the gas piston preferably comprises at least one gas piston bearing with a sealing means which seals the gas piston against the gas cylinder (claim 2).
  • the gas piston or short-stroke gas piston can widen conically to form a gas piston bearing, so that at least one gas piston bearing section, which extends entirely or partially over the longitudinal direction of the gas cylinder, has a section approximately complementary to the inner circumference of the gas cylinder.
  • the sealing means can, for example, be provided from at least one or more sealing rings, which are in one in the gas piston bearing provided annular recess can be used. Alternative suitable sealants can also be used.
  • the closing element preferably comprises an inner stop surface for a counter stop surface of the gas piston bearing, which serves to limit the return movement of the gas piston in the direction of the shaft (claim 3).
  • the stop advantageously defines the return path of the gas piston with repeatable accuracy.
  • the gas piston separates from the gas linkage, so that the closure arrangement and the gas linkage run back separately.
  • the closure arrangement moves forward, the gas rod comes into contact with the gas piston again and brings it into its starting position.
  • the inner stop surface can be provided, for example, as a circumferential stop shoulder, which is in particular designed in a ring shape.
  • the inner stop surface can also have conically tapering introduction surfaces for the gas piston.
  • the counter-stop surface on the gas piston is designed to be complementary to the stop surface, for example ring-shaped or conical.
  • this measure provides a repeatable mobility of the gas piston over a defined distance with simple means.
  • At least one recess for draining off dirt is preferably provided on the closing element of the gas take-off in the area of the stop surface.
  • the one or more recesses can be provided, for example, as bores in the passage for the gas piston or its shaft in the closing element or cover, and allow dirt particles to escape.
  • the recesses can be introduced, for example, when the closing element is manufactured or subsequently as bores or milled-out portions.
  • the fastening device can be realized with suitable means, for example threaded connections.
  • the fastening device is provided as a closure section on the outer circumference of the gas cylinder, at its end facing the shaft, and the closure element is provided in its interior with a complementary closure section, the two closure sections being designed as bayonet closures.
  • the design of a closure section on the outer circumference of the gas cylinder makes it easier to put the closure element on.
  • An embodiment as a bayonet lock enables a releasable connection between the closing element and the gas cylinder that is repeatable with simple construction.
  • the gas piston or short-stroke gas piston can come into direct contact with the gas linkage of the closure arrangement with its end penetrating the closing element.
  • the gas piston can preferably be connected to an attachment via a fastening means on a bearing section (claim 5).
  • the attachment can, for example, be provided as a cap which can be connected to the gas piston and a mating thread in the interior of the cap via a fastening means, for example a threaded section. Other suitable types of fastening are also possible.
  • the cap comes into contact with the end of the gas rod and drives it so that the cap can easily be replaced, for example if it is worn.
  • the connection between the gas piston and the attachment is preferably secured via a securing element (claim 6).
  • a pin or wire or some other type of securing means can be provided as a securing element, which secures the end cap at the shaft end of the short-stroke gas piston, for example by inserting the securing means in a bore.
  • the closing element or the cover can have an extension which extends in the direction of the barrel muzzle and which is provided in particular for engagement with an elastic element.
  • a gas piston nose is formed at the mouth-side end of the gas piston, which is at least partially longitudinally displaceable within a cylindrical, in particular multi-stage gas passage in the gas outlet.
  • the outer diameter of the gas piston shaft can taper in the direction of the pipe mouth, so that the gas piston nose has approximately complementary outer dimensions to the inner diameter provided at the gas tapping tubular gas passage.
  • the gas passage preferably ends in a gas outlet nozzle through which propellant gases can be diverted to the outside in the direction of the mouth (claim 7).
  • the interaction between the gas piston nose and gas passage as well as the outlet nozzle enables excess propellant gases to be ventilated.
  • the outlet nozzle can in particular be used as a hard metal insert in the gas take-off. This measure enables a long service life of the gas nozzle.
  • a gas outlet opening can be provided in an additional gas channel in the area between the gas passage and the outlet nozzle. This measure is made possible with structurally simple means a gas adjustment, whereby excess propellant gases are diverted or discharged into one or more gas outlet openings.
  • a gas adjusting device is preferably provided at the mouth-side end of the gas take-off, which surrounds a mouth-side section of the gas take-off and can be brought into at least fluid connection with the gas outlet nozzle for gas delivery (claim 8).
  • the gas adjustment device can be provided, for example, as an attachable gas adjustment bushing which encompasses an in particular cylindrical outer section of the gas takeoff in the direction of the weapon barrel.
  • a cylindrical configuration of this outer section enables simple adjustment of the gas adjustment bushing by rotation.
  • the gas adjustment device can preferably be coupled to the gas take-off via a fastening device, in particular via a bayonet lock (claim 9).
  • this measure enables the gas adjustment device to be placed on repeatedly and securely to the gas take-off as well as a form-fitting locking.
  • the bayonet lock enables the gas adjustment device to be adjusted at the gas take-off.
  • the bayonet lock can have an insertion slot for a pin on the gas adjustment device, so that the pin is inserted into the slot when the gas adjustment bushing is put on. When rotated, the pin can move into a circular bayonet locking section and is secured there against longitudinal movement.
  • the gas adjusting device preferably comprises at least one safety device, by means of which it can be adjusted and indexed between at least two gas control positions (claim 10).
  • the gas adjustment device can in particular be rotatable clockwise or counterclockwise.
  • the safety device can be provided, for example, as a latching position or safety pin in order to prevent an unintentional adjustment from the selected gas control position.
  • the safety device is preferably provided as a particularly U-shaped shaped spring which can be inserted and fixed in complementary recesses in the gas take-off (claim 11).
  • the shaped spring is also referred to as a detent spring and enables the gas adjustment bushing to be indexed elastically in the respective detent grooves.
  • the shaped spring can in particular be provided as a U-shaped element which surrounds a section of the gas takeoff.
  • recesses can be provided in the interior of the shaped spring, which are fixed or can be fixed as shaped spring catches on complementary bearing sections of the gas takeoff.
  • the shaped spring can have an upwardly extending latching lug for indexing the gas adjustment bushing.
  • the shaped spring can have at least one extension which extends approximately in the longitudinal direction and which is connected to the shaped spring via an extension section.
  • a latching lug in particular a serrated latching lug, can be provided which indexes the cover or the closing element and for this purpose engages with a counter recess in an extension of the closing section or cover.
  • the gas cylinder of the gas take-off extends coaxially to the weapon barrel in its longitudinal direction.
  • the self-loading firearm preferably comprises a gas linkage for detachable coupling with the gas take-off, as well as a locking arrangement which is coupled to the gas linkage and which is arranged to be longitudinally movable in the weapon housing (claim 14). This measure ensures that the gas pressure reloading mechanism works reliably with structurally simple means.
  • Fig. 1 shows the self-loading firearm 1 in an exploded view.
  • the self-loading firearm is designed as an assault rifle (HK433) and essentially comprises the following elements: a weapon barrel 3 with a gas take-off 5 mounted on it and a flash hider 7; a weapon housing 9 into which the weapon barrel 3 can be inserted; a handguard 11 that can be coupled to the weapon housing 9 and a handle 13 that can be mounted on the weapon housing 9. Furthermore, a loading device 17, a locking arrangement 19 and a shoulder rest 21 that can be coupled to the weapon housing 9 are provided.
  • Fig. 2 shows an enlarged detail view from Fig. 1 with the gas take-off 5 mounted on the tube 3.
  • the tube 3 comprises in its rear end a locking bushing 23, on the underside of which a locking and positioning pin 26 is provided and on the rear end of which a tubular nut 24 is attached to the weapon shaft.
  • the locking bush 23 is inserted into a pipe receptacle (not shown here) and clamped via the pipe nut 24.
  • the gas take-off 5 comprises a cylindrical tube bearing 27 for mounting on the weapon barrel 3.
  • the flash hider 7 is removed or unscrewed and the gas take-off 5 is pushed on.
  • a bore 29 traversing it transversely is provided as a bearing for a transverse pin 30 which fixes the gas take-off 5.
  • Adjacent a hole 31 is provided as a bearing for a retaining bolt 32 for fastening an attachment, for example a 40mm HK grenade launcher.
  • a gas adjustment device in the form of a gas adjustment bushing 33 is placed on the front of the gas take-off 5 (cf. in particular Figures 13a, b and 15-21 ).
  • a shaped spring 35 extends to the rear below the gas adjustment bushing 33 and can be inserted in bearings 37a, b on the gas take-off 5 (see also FIG Figures 14-21 ).
  • the shaped spring in cooperation with the bayonet lock, serves to index and fix the gas adjustment bushing 33.
  • a closing element or cover 39 adjoins the gas take-off 5, which holds a short-stroke gas piston (not shown here) in a Fig.
  • Gas cylinder 42 receives and sets there (cf., inter alia Fig. 5 , 9 , 18th , 20th and 22nd ).
  • the short-stroke gas piston 43 penetrates the cover 39 and is surrounded at its outer end by a fixed end cap 41 (see also FIG Figures 5, 7, 8 and 9-11 ).
  • a gas piston rod or a gas linkage 45 rests against the end cap 41 before the shot is fired.
  • the gas piston rod 45 is firmly connected to the bolt carrier 47 of the bolt arrangement 19 (see also FIG Figure 4a ).
  • the propellant gas drives the short-stroke gas piston 43 so that it moves backwards in the direction of the weapon stock 21 moves.
  • the short-stroke gas piston 43 transmits the impulse it has picked up to the gas rod 45 and drives it with the bolt carrier 19 connected to it backwards in the direction of the weapon stock 21.
  • Fig. 3 shows the gas piston rod 45 and the bolt carrier 47 in their rearmost position after a shot has been fired. Lid or end cap 41 and gas piston rod 45 are separated from one another. As a result, the short-stroke gas piston differs essentially from other gas pistons which are coupled or connected to the gas piston rod or the bolt carrier and which run back together in the direction of the weapon stock 21 after the shot has been fired.
  • Fig. 4 shows a detailed illustration of the closure arrangement 19.
  • the front end of the closure carrier 47 is coupled to the gas piston rod 45.
  • On its underside, it comprises a locking head 49 which is guided in its interior so that it can be moved longitudinally and rotated.
  • This comprises a control bolt 51 guided in a control link 53 for locking and unlocking in a known manner.
  • Fig. 5 shows a partial exploded view of the gas takeoff 5 from Figs. 1 to 3 .
  • the gas piston or short-stroke gas piston 43 is removed from the gas cylinder 42 and decoupled from the cover 39 and the end cap 41.
  • a locking section 57 extending approximately perpendicular to the longitudinal direction is provided for locking the cover or closing element 39.
  • the cover 39 has a counter-locking section in its interior (cf. Fig. 7 ).
  • the two locking sections fix the cover 39 to the gas take-off 5 in the manner of a bayonet lock.
  • the edges of the gas take-off 5 extending in the direction of the weapon shaft 21 are chamfered for easier placement of the cover 39.
  • the short-stroke gas piston 43 comprises at its front, mouth-side end a gas piston nose or valve pin 59 for longitudinally movable guidance and sealing in a gas passage 105, which extends as an extension of the gas cylinder 42 to the mouth.
  • the valve pin 59 is at its front end for easy use in th in the direction of the shaft into a conical section 61 and adjoins a bearing section 63 with a circumferential annular groove 65.
  • the outer dimensions of the bearing section 63 are approximately complementary to the inner dimensions of the gas cylinder 42.
  • a sealing means 67 in particular in the form of three sealing rings, is inserted into the groove 65 to seal the short-stroke gas piston 43 from the gas cylinder 42.
  • the sealing rings 67 also have a cleaning effect, since they drive out dirt on the gas cylinder 42 forwards.
  • the bearing section 63 continues in a stepped manner in the direction of the shaft into a tapered cylindrical section 69, which is provided at its rear end into a bearing section 71 for mounting the short-stroke gas piston 43 on or with the end cap 41.
  • the bearing section 71 comprises a threaded section 40 (cf. Fig. 18 ) which can be screwed with a mating thread (not shown) inside the end cap 41.
  • a locking pin 94 is provided, which secures the end cap 41 in its position (cf. Fig. 18 , 20th and 22nd ).
  • the end cap 41 comprises semicircular recesses 79 on its underside.
  • the short-stroke gas piston 43 is first inserted into the gas cylinder and the cover or closing element 39 is placed thereon and locked via the locking section 57.
  • the cover 39 comprises a largely circumferential sawtooth profile 75 on its outer circumference, which improves the grip of the cover 39, in particular when wearing gloves or under adverse conditions.
  • the cover 39 At its front end facing the pipe mouth, the cover 39 comprises an extension 73 that extends partially forwards (cf. in particular Figures 7, 11 and 12, 15 ).
  • the cover 39 has an approximately U-shaped profile (cf. Fig. 7 ).
  • a pin 115 is used to position the gas tap 5 on the weapon barrel 3.
  • Fig. 6 shows a perspective view of the gas take-off 5, in which the bearing sections 37a and b are shown enlarged.
  • the bearing section 37a adjoins a bore 38 which penetrates the gas take-off 5 transversely.
  • the bore 38 is used for latching / taps 135a, b of the shaped spring.
  • the bearings 37a, b are used to insert the shaped spring 35.
  • a cylindrical receiving section 84 for the gas adjustment bushing 33 is provided at the front end of the gas take-off 5 towards the pipe mouth.
  • a gas outlet 86 from the gas cylinder 42 is provided in the interior of the receiving section 84.
  • An insertion section of a bayonet locking link 80 is for receiving a complementary pin 117 (cf. Figure 13a and b) is provided and merges into an annular bayonet link section 82 which is used to fix the gas adjustment bushing 33 on the gas take-off 5 via the pin 117.
  • the shaped spring 35 in cooperation with this bayonet lock, serves to index and fix the gas adjustment bushing 33.
  • Fig. 7 shows a detailed representation of the cover or closing element 39 with its inner passage 81 for the short-stroke gas piston 43.
  • the passage 81 widens conically towards its edge and thus forms a conical insertion section 91 for the passage of the short-stroke gas piston 43
  • the passage 81 has semicircular bores or passages 83a and b on its circumferential edge, which are used to remove dirt particles and dirt. This measure ensures a full function of the gas take-off 5 even under adverse circumstances.
  • the cover 39 comprises two extensions which extend in the direction of the mouth and which have a locking section 87a, b in their interior for engagement with the locking section 57 on the gas take-off 5.
  • two attachment sections or insertion sections 85a and b are provided, which can be placed on the locking lugs 58a, b in the locking section 57 (cf. Fig. 12 ) and rotated into their locking position after placement (cf. Fig. 11).
  • Fig. 11 shows the lid 39 in its top position and Fig. 10 in its locking position.
  • the locking sections 87a, b adjoin the insertion sections 85a, b and, as a bayonet catch, encompass the locking lugs 58a, b and thus fix the cover 39 to the gas take-off 5.
  • an extension 73 is formed which, with a latch provided on its outside, serves to index the shaped spring (cf. Fig. 11 , 12 and 15th ).
  • Fig. 8 shows a side view of the gas take-off 5 and mounted on the weapon barrel 3
  • Fig. 9 shows a longitudinal section.
  • Known trains and fields run within a pipe inner wall or barrel bore 97 in order to impart a twist to a projectile.
  • a bearing section 113 is provided for receiving and securing the flash hider 7, for example via a threaded section (not shown).
  • a pipe bore 99 extends obliquely to the longitudinal direction, through which propellant gases are diverted into the gas take-off 5 after a shot has been fired and a projectile has passed.
  • a gas bore or gas channel 101 sealingly adjoins the pipe bore 99 is provided, which also runs obliquely to the longitudinal direction and opens on its upper side in the gas cylinder 42 approximately in the area of the conical section 61 of the short-stroke gas piston 43.
  • Fig. 9 the short-stroke gas piston 43 is in its rest position before a shot is fired.
  • the valve pin 59 is located within the gas passage or gas channel 105 and seals it off towards the front towards the mouth.
  • the valve pin 59 is used to regulate the gas pressure and to ventilate excess propellant gases in the direction of the mouth, which releases the gas cylinder 42 after a certain return path of the gas piston 43, whereupon the gas cylinder 42 is ventilated and no further substantial acceleration of the gas piston takes place and the excess propellant gases over a gas passage with the inserted hard metal bushing 111 with a predetermined small diameter can escape forwards in the direction of the mouth.
  • the sealing rings 67 are provided within the groove 65 and the bearing section 63 merges into the cylindrical section 69 in a stepped manner at its end on the shaft side.
  • the step forms a stop surface 103, which strikes the counter stop surface 89 in the closing element or cover 39 after a shot has been fired to limit the movement of the short-stroke gas piston 43.
  • the gas channel 105 merges into a stepped extension into a gas channel 107 which comprises a lateral gas outlet bore 109.
  • the gas channel 107 merges into an insert 111 with an outlet nozzle in order to ventilate excess propellant gases to the outside.
  • the insert 111 is a hard metal nozzle intended. This hard metal bushing is erosion-resistant and serves as a nozzle for the controlled outflow of propellant gases.
  • Fig. 10 shows the cover 39 on the gas take-off 5 in the locked state.
  • Fig. 11 shows the unlocked cover 39 placed at an angle. In this position, the cover 39 can be removed to the rear in the direction of the shaft.
  • the short-stroke gas piston 43 is in Fig. 12 Almost completely removed from the gas cylinder 42 and the cylindrical valve nose 59 can be seen.
  • the locking lugs 58a and b of the locking section 57 which are arranged opposite one another in pairs, are also shown.
  • FIG. 13 shows a perspective view of the throttle adjustment bushing 33 and FIG Figure 13b a longitudinal sectional view.
  • a pin 117 penetrating the gas adjustment bushing 33 is inserted, which is mounted in a bore from above. This pin 117 is used for bayonet locking of the gas adjustment socket 33 on the cylindrical receptacle 84 of the gas take-off 5.
  • a semicircular recess 119 running transversely to the longitudinal direction is provided, each of which has indexing positions for a latching lug 137 on the ends Has shaped spring 35.
  • the shaped spring 35 engages positively with a catch 120a, b.
  • a bore 121 penetrating the gas adjustment bushing 33 is provided approximately at the level of the pin 117.
  • a further bore 123 is provided above this and, adjoining it, a further somewhat larger bore 125 which serves as a gas outlet opening for adjusting the gas of the gas adjustment bushing 35.
  • the inner bore of the cylindrical gas adjustment bushing 33 is complementary to the receiving section 84 (cf. Fig. 6 ) is designed, tapers conically towards the front and merges into a step section 127, which serves as a gas outlet for excess propellant gases.
  • Fig. 14 shows the shaped spring 35, which comprises obliquely running insertion sections 131a, b at its front end on the mouth side, which facilitate mounting of the shaped spring 35 on the gas tap 5. Stops 133a, b and 135a and b serve as stop and latching positions which latch the shaped spring 35 on the gas takeoff 5. At the rear end of the shaped spring 35 facing the weapon shaft 21 there is provided a latching lug 137 which indexes the gas adjustment bushing 33 in the latches 120a, b of the recess 119 on the gas adjustment socket 33 is used.
  • the leg of the U-shaped shaped spring 35 extends outward, upward and backward, into a locking lug 139, which extends forwards in the longitudinal direction parallel to the U-shaped leg of the shaped spring 35 and has another locking lug on its front 141 has.
  • the locking lug 139 extends approximately at right angles parallel to the gas take-off 5 and the locking lug 141 is indexed on the extension 73 of the cover 39 (cf. also Fig. 15 and 16 ).
  • the gas take-off 5 has a bore 147 shown.
  • the gas adjustment bushing 33 has a transverse slot 145 on its mouth-side front side and is also used for adjustment by means of a tool.
  • Fig. 17 shows the gas take-off 5 with the gas adjustment bushing 33 in the "N" position (normal operation) and Fig. 18 a corresponding longitudinal sectional view in a view from above.
  • Fig. 19 shows the gas adjustment bushing 33 in its position "S" (muffler operation) and Fig. 20 a corresponding longitudinal section in a view from above.
  • To adjust the gas adjustment bushing 33 it is rotated either with a tool in the slot 145 or by hand through approximately 90 ° between the positions "N" and "S”.
  • the latching nose 137 of the shaped spring 35 slides along the latching recess 119 from the latching position 120a to the latching position 120b.
  • the pin 117 slides within the locking link 82.
  • the two positions “N” and “S” differ essentially in that the gas passage or gas passage opening 109 in FIG Fig. 18 is closed at its top or outside via the side wall of the locking sleeve 33 and in Fig. 20 is aligned with the bore or gas outlet opening 125 in the gas adjustment bushing 133, so that ventilated propellant gases are discharged both via this side gas outlet and via the front valve nozzle in the insert 111 in order to ensure the weapon function when a silencer (not shown) is used and over- or to prevent malfunction of the silencer. Since the hard metal insert of the outlet nozzle has a passage with a defined small cross section, the side gas outlet brings relief and thus faster ventilation, which is only open in the muffler position.
  • Fig. 21 shows a side view of the gas take-off 5 with extended short-stroke gas piston 43.
  • the shaft-side end with the end cap 47 is located in FIG Fig. 21 and 22nd each on the left side, i.e. mirror-inverted to the previous figures.
  • the annular stop surface 103 of the short-stroke gas piston 43 rests against the counter stop surface 89 in the closing element or cover 39.
  • the gas piston rod 45 is already separated from the short-stroke gas piston 43 in this position.
  • the closure arrangement 19 moves forward, the gas piston rod 45 of the closure carrier 47 engages the cover or the end cap 41 and drives the short-stroke gas piston 43 back into its starting position. The cycle then starts again when the shot is fired.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (14)

  1. Dispositif de réduction de gaz (5) pour une arme à feu automatique (1), avec :
    une section de montage (25) servant à fixer le dispositif de réduction de gaz (5) au niveau d'un canon (3),
    un cylindre à gaz (42), qui peut être relié par l'intermédiaire d'un canal de gaz (101) à un alésage de canon (99) dans le canon (3),
    un piston à gaz (43) disposé de manière à pouvoir coulisser longitudinalement dans le cylindre à gaz (42), servant à entraîner un mécanisme de recharge pneumatique,
    dans lequel peut être accouplé de manière amovible à l'extrémité, tournée vers la crosse, du cylindre à gaz (42), un élément de terminaison (39), qui présente un passage (81) pour le piston à gaz (43), caractérisé en ce que
    un système de fixation (57, 58a,b) est prévu en tant que section de fermeture au niveau de la périphérie extérieure du cylindre à gaz (42) au niveau de son extrémité tournée vers la crosse, et l't>élément de terminaison (39) comprend dans son intérieur une section de fermeture complémentaire (85a,b, 87a,b), dans lequel les sections de fermeture (57, 58a,b ; 85a,b, 87a,b) sont réalisées en tant que fermeture à baïonnette, et
    un ergot de piston à gaz (59) est prévu au niveau de l'extrémité côté embouchure du piston à gaz (43), qui peut être monté de manière à pouvoir coulisser au moins en partie longitudinalement à l'intérieur d'un passage de gaz (105, 107) cylindrique, en particulier à plusieurs étages, dans le dispositif de réduction de gaz (5).
  2. Dispositif de réduction de gaz (5) selon la revendication 1, caractérisé en ce que le piston à gaz (43) comprend un palier de piston à gaz (63) avec un moyen d'étanchéité (67), qui étanchéifie le piston à gaz (43) par rapport au cylindre à gaz (42).
  3. Dispositif de réduction de gaz (5) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de terminaison (39) présente une surface de butée (89) intérieure pour une surface de contre-butée (103) du palier de piston à gaz (63), qui sert à limiter le mouvement de retour du piston à gaz (43) en direction de la crosse.
  4. Dispositif de réduction de gaz (5) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un évidement (83a, b) servant à évacuer des impuretés est prévu au niveau de l'élément de terminaison (39) dans la zone de la surface de butée (89).
  5. Dispositif de réduction de gaz (5) selon l'une quelconque des revendications précédentes, caractérisé en ce que le piston à gaz (43) peut être relié à un embout (41) au niveau d'une section de palier (71) par l'intermédiaire d'un moyen de fixation (40).
  6. Dispositif de réduction de gaz (5) selon la revendication 5, caractérisé en ce que la liaison entre le piston à gaz (43) et l'embout (41) est bloquée par l'intermédiaire d'un élément de blocage (44).
  7. Dispositif de réduction de gaz (5) selon l'une quelconque des revendications précédentes, caractérisé en ce que le passage de gaz (105, 107) débouche dans une buse de sortie de gaz (111), par laquelle du gaz propulseur peut être évacué vers l'extérieur en direction de l'embouchure.
  8. Dispositif de réduction de gaz (5) selon la revendication 7, caractérisé par un système d'ajustement de gaz (33) au niveau de l'extrémité côté embouchure du dispositif de réduction de gaz (5), qui entoure une section côté embouchure du dispositif de réduction de gaz (5) et peut être amené en communication fluidique avec la buse de sortie de gaz (111) aux fins de la distribution de gaz.
  9. Dispositif de réduction de gaz (5) selon la revendication 8, caractérisé en ce que le système d'ajustement de gaz (33) peut être couplé de manière amovible au dispositif d'évacuation de gaz (5) par l'intermédiaire d'un dispositif de fixation (80, 82, 117), en particulier par l'intermédiaire d'une fermeture à baïonnette (80, 82, 117).
  10. Dispositif de réduction de gaz (5) selon l'une quelconque des revendications 8 ou 9, caractérisé en ce que le système d'ajustement de gaz (33) peut être ajusté et indexé entre au moins deux positions de régulation de gaz par l'intermédiaire d'un système de blocage (35, 119, 120a,b, 137).
  11. Dispositif de réduction de gaz (5) selon la revendication 10, caractérisé en ce que le système de blocage (35, 119, 120a,b, 137) est prévu en tant que ressort profilé (35) en particulier en forme de u, qui peut être inséré et immobilisé dans des paliers (37) complémentaires du dispositif de réduction de gaz (5).
  12. Canon (3) avec un dispositif de réduction de gaz (5) selon l'une quelconque des revendications précédentes.
  13. Arme à feu automatique (1) avec un dispositif de réduction de gaz (5) selon l'une quelconque des revendications 1 à 11.
  14. Arme à feu automatique (1) selon la revendication 13, comprenant une tige de piston à gaz (45) destinée à être couplée de manière amovible au dispositif de réduction de gaz (5) ainsi qu'un ensemble de fermeture (19) couplé à la tige de piston à gaz (45), disposé de manière mobile longitudinalement dans le boîtier d'arme (9) .
EP18160522.1A 2017-03-07 2018-03-07 Dispositif d'évacuation de gaz et canon équipé d'un tel dispositif ainsi qu'une arme à feu automatique pourvue d'un tel dispositif Active EP3372944B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HRP20201920TT HRP20201920T1 (hr) 2017-03-07 2020-12-01 Reduktor plina i njime opremljena cijev oružja, kao i vatreno oružje s automatskim punjenjem s takvim reduktorom plina

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017002165.1A DE102017002165B4 (de) 2017-03-07 2017-03-07 Gasabnahme und damit ausgestattetes Waffenrohr sowie Selbstladefeuerwaffe mit einer solchen Gasabnahme

Publications (3)

Publication Number Publication Date
EP3372944A2 EP3372944A2 (fr) 2018-09-12
EP3372944A3 EP3372944A3 (fr) 2018-12-19
EP3372944B1 true EP3372944B1 (fr) 2020-09-02

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EP18160522.1A Active EP3372944B1 (fr) 2017-03-07 2018-03-07 Dispositif d'évacuation de gaz et canon équipé d'un tel dispositif ainsi qu'une arme à feu automatique pourvue d'un tel dispositif

Country Status (4)

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US (1) US10830546B2 (fr)
EP (1) EP3372944B1 (fr)
DE (1) DE102017002165B4 (fr)
HR (1) HRP20201920T1 (fr)

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DE102017002165B4 (de) * 2017-03-07 2018-12-27 Heckler & Koch Gmbh Gasabnahme und damit ausgestattetes Waffenrohr sowie Selbstladefeuerwaffe mit einer solchen Gasabnahme
US20190360772A1 (en) * 2018-05-25 2019-11-28 KBA Custom, LLC Adjustable gas block
EP3800424B1 (fr) 2019-10-04 2022-09-21 Glock Technology GmbH Carabine opérée par gaz
US11994357B2 (en) * 2020-01-06 2024-05-28 Axts, Inc. Timing, fastening, and sealing features for firearm gas blocks
US11187473B1 (en) 2021-02-01 2021-11-30 A. W. Richey Firearm
US11313633B1 (en) 2021-04-13 2022-04-26 A. W. Richey Firearm
DE102021005162A1 (de) 2021-10-15 2023-04-20 Heckler & Koch Gmbh Gasabnahme

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Also Published As

Publication number Publication date
HRP20201920T1 (hr) 2021-01-22
US20180259278A1 (en) 2018-09-13
DE102017002165A1 (de) 2018-09-13
US10830546B2 (en) 2020-11-10
EP3372944A3 (fr) 2018-12-19
DE102017002165B4 (de) 2018-12-27
EP3372944A2 (fr) 2018-09-12

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