EP0167067B1 - Shot-velocity regulator for gas-operated firearms - Google Patents

Shot-velocity regulator for gas-operated firearms Download PDF

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Publication number
EP0167067B1
EP0167067B1 EP85107606A EP85107606A EP0167067B1 EP 0167067 B1 EP0167067 B1 EP 0167067B1 EP 85107606 A EP85107606 A EP 85107606A EP 85107606 A EP85107606 A EP 85107606A EP 0167067 B1 EP0167067 B1 EP 0167067B1
Authority
EP
European Patent Office
Prior art keywords
gas
shot
tube
pipe
velocity regulator
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
Application number
EP85107606A
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German (de)
French (fr)
Other versions
EP0167067A1 (en
Inventor
Werner Bosshard
Willi Schröder
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
Werkzeugmaschinenfabrik Oerlikon Buhrle 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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Publication of EP0167067A1 publication Critical patent/EP0167067A1/en
Application granted granted Critical
Publication of EP0167067B1 publication Critical patent/EP0167067B1/en
Expired 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
    • 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

Definitions

  • the invention relates to a cadence controller on a firearm operated by gas pressure, with a temperature-dependent throttle element which regulates the gas pressure by changing the cross section of a gas channel, which is arranged to be movable for changing the cross section and is moved by a device which has a tube.
  • the device has a tube which expands through the hot gases and thereby reduces the cross section of the throttle. Due to the reduced throttle cross-section, less gas reaches the gas piston, which means that the cadence should remain constant even with a long series fire.
  • the tube expands over time, but also the housing in which the tube is located, as a result of which the throttle cross section increases again and the cadence does not remain constant.
  • a temperature-dependent throttle element is also known (see GB-A-279 729) which has two concentric tubes which expand to different extents when hot gases pass through and which are connected to one another at one end. With this throttle element, the passage cross section is also reduced. A different coefficient of expansion is not provided.
  • This throttle body is otherwise suitable for heating systems and not for weapons.
  • the present invention aims to provide a cadence controller which is simple and reliable in construction and which prevents an inadmissible increase in cadence when the firearm is heated.
  • the cadence controller according to the invention in that the device has an additional tube, the two tubes being arranged concentrically to one another, expanding to different extents when hot gases pass through and which are connected to one another at their end, and by the outer tube has a larger coefficient of expansion than the inner tube and therefore expands more evenly when heated than the inner tube.
  • This weapon barrel 1 has the transverse bore 2 through which gas is withdrawn and which opens into the gas sampling tube 3, which is arranged parallel to the weapon barrel 1.
  • the gas sampling tube 3 has at its lower end the transverse bore 4, which opens into the cadence controller 21.
  • the cadence control 21 and the weapon barrel 1 are fastened in the weapon housing 6, of which only a very small section is shown.
  • the cadence controller 21 has the cylinder 7, in which the gas piston 8 is slidably mounted. With the help of the gas piston 8, the firearm is actuated in a manner known per se and therefore not shown in detail, i.e. after each shot, the next shot is triggered with the help of the gas piston 8 in a series fire.
  • the gas drawn from the weapon barrel 1 with the aid of the transverse bore 2, the gas sampling tube 3 and the transverse bore 4 serves to actuate the gas piston 8, the cadence regulator 21 having the task of controlling the supply of the extracted gas to the gas piston.
  • the structure of the cadence regulator 21 is now as follows:
  • the cylinder 7, in which the gas piston 8 is slidably mounted, has the bottom 9 in its central part, which has the opening 10.
  • the cylinder 7 has in its central part the outer annular groove 12, into which the transverse bore 4 opens.
  • the bottom 9 of the cylinder 7 has, parallel to the central opening 10, a number of bores 13 which on the one hand open into the outer annular groove 12 and on the other hand into an upper chamber 14. From this chamber 14 the gas can on the one hand unhindered through the central bore 10 the gas piston 8 act and on the other hand flow through a bore 22 of an insert body 23, which is also located in the upper chamber 14.
  • a cylindrical tube 24 is attached, which is preferably made of aluminum.
  • This second cylindrical tube 26 is arranged concentrically to the first cylindrical tube 24 and is located inside the first tube 24.
  • a throttle body 27 is attached at the lower end of the inner cylindrical tube 26 .
  • the throttle body 27 and the insert body 23 there is a throttle opening which can be adjusted with the aid of the pin 25 screwed into the tube 24.
  • the gases can pass from the bore 22 of the insert body 23 through this throttle opening between the two tubes 24 and 26.
  • the outer tube 24 has outlet openings 28 at its upper end through which the gases present between the two tubes 24, 26 can reach the atmosphere. With a locking member 29, the pin 25 can be secured against unintentional rotation.
  • the mode of operation of the cadence regulator 21 is as follows:

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Toys (AREA)
  • Feed For Specific Animals (AREA)

Description

Die Erfindung betrifft einen Kadenzregler an einer durch Gasdruck betätigten Feuerwaffe, mit einem temperaturabhängigen, den Gasdruck durch Querschnittsveränderungen eines Gaskanals regulierenden Drosselorgan, das zur Querschnittsveränderung beweglich angeordnet ist und von einer Vorrichtung bewegt wird, welche ein Rohr aufweist.The invention relates to a cadence controller on a firearm operated by gas pressure, with a temperature-dependent throttle element which regulates the gas pressure by changing the cross section of a gas channel, which is arranged to be movable for changing the cross section and is moved by a device which has a tube.

Bei einem bekannten Kadenzregler dieser Art (siehe DE-A-1 053 977) weist die Vorrichtung ein Rohr auf, das sich durch die heissen Gase ausdehnt und dabei den Drosselquerschnitt verringert. Durch den verringerten Drosselquerschnitt gelangt weniger Gas auf den Gaskolben, wodurch die Kadenz auch bei einem längeren Serienfeuer konstant bleiben sollte. Es hat sich aber gezeigt, dass sich mit der Zeit nicht nur das Rohr ausdehnt, sondern auch das Gehäuse in dem sich das Rohr befindet, wodurch sich der Drosselquerschnitt wieder vergrössert und die Kadenz doch nicht konstant bleibt.In a known cadence controller of this type (see DE-A-1 053 977), the device has a tube which expands through the hot gases and thereby reduces the cross section of the throttle. Due to the reduced throttle cross-section, less gas reaches the gas piston, which means that the cadence should remain constant even with a long series fire. However, it has been shown that not only the tube expands over time, but also the housing in which the tube is located, as a result of which the throttle cross section increases again and the cadence does not remain constant.

Es ist ferner ein temperaturabhängiges Drosselorgan bekannt (siehe GB-A-279 729), welches zwei konzentrische Rohre aufweist, die sich beim Durchtrittvon heissen Gasen unterschiedlich stark ausdehnen und die an ihrem einen Ende miteinander verbunden sind. Bei diesem Drosselorgan verringert sich der Durchlassquerschnitt ebenfalls. Ein unterschiedlicher Ausdehnungskoeffizient ist nicht vorgesehen. Dieses Drosselorgan eignet sich im übrigen für Heizsysteme und nicht für Waffen.A temperature-dependent throttle element is also known (see GB-A-279 729) which has two concentric tubes which expand to different extents when hot gases pass through and which are connected to one another at one end. With this throttle element, the passage cross section is also reduced. A different coefficient of expansion is not provided. This throttle body is otherwise suitable for heating systems and not for weapons.

Die vorliegende Erfindung bezweckt die Schaffung eines Kadenzreglers, der einen einfachen und zuverlässigen Aufbau besitzt und bei der Erwärmung der Feuerwaffe einen unzulässigen Anstieg der Kadenz verhindert.The present invention aims to provide a cadence controller which is simple and reliable in construction and which prevents an inadmissible increase in cadence when the firearm is heated.

Diese Aufgabe wird durch den erfindungsgemässen Kadenzregler dadurch gelöst, dass die Vorrichtung ein zusätzliches Rohr aufweist, wobei die zwei Rohre konzentrisch zueinander angeordnet sind, sich beim Durchtritt von heissen Gasen unterschiedlich stark ausdehnen und welche an ihrem Ende miteinander verbunden sind, und dass das äussere Rohr einen grösseren Ausdehnungskoeffizienten besitzt als das innere Rohr und sich daher bei gleichmässiger Erwärmung stärker ausdehnt als das innere Rohr.This object is achieved by the cadence controller according to the invention in that the device has an additional tube, the two tubes being arranged concentrically to one another, expanding to different extents when hot gases pass through and which are connected to one another at their end, and by the outer tube has a larger coefficient of expansion than the inner tube and therefore expands more evenly when heated than the inner tube.

Ein Ausführungsbeispiel des erfindungsgemässen Kadenzreglers ist im folgenden anhand der beigefügten Zeichnung ausführlich beschrieben. Die einzige Figur der Zeichnung zeigt einen Längsschnitt durch ein Ausführungsbeispiel des Kadenzreglers an einem Waffenrohr einer Feuerwaffe.An embodiment of the cadence controller according to the invention is described in detail below with reference to the accompanying drawing. The only figure of the drawing shows a longitudinal section through an embodiment of the cadence control on a barrel of a firearm.

Gemäss dieser Figur ist vom Waffenrohr 1 nur ein kleiner Abschnitt dargestellt. Dieses Waffenrohr 1 weist die Querbohrung 2 auf durch welche Gas entnommen wird und die in das Gasentnahmerohr 3 mündet, das parallel zum Waffenrohr 1 ageordnet ist. Das Gasentnahmerohr 3 besitzt an seinem unteren Ende die Querbohrung 4, die in den Kadenzregler 21 mündet. Der Kadenzregler 21 und das Waffenrohr 1 sind im Waffengehäuse 6 befestigt, von dem nur ein sehr kleiner Abschnitt dargestellt ist. Der Kadenzregler 21 weist den Zylinder 7 auf, in dem der Gaskolben 8 verschiebbar gelagert ist. Mit Hilfe des Gaskolbens 8 wird, in an sich bekannter und daher nicht näher dargestellten Weise, die Feuerwaffe betätigt, d.h. nach jedem Schuss wird mit Hilfe des Gaskolbens 8 bei einem Serienfeuer der nächste Schuss ausgelöst. Das mit Hilfe der Querbohrung 2, dem Gasentnahmerohr 3 und der Querbohrung 4 aus dem Waffenrohr 1 abgezapfte Gas dient zur Betätigung des Gaskolbens 8, wobei der Kadenzregler 21 die Aufgabe hat, die Zufuhr des abgezapften Gases zum Gaskolben zu steuern.According to this figure, only a small section of the weapon barrel 1 is shown. This weapon barrel 1 has the transverse bore 2 through which gas is withdrawn and which opens into the gas sampling tube 3, which is arranged parallel to the weapon barrel 1. The gas sampling tube 3 has at its lower end the transverse bore 4, which opens into the cadence controller 21. The cadence control 21 and the weapon barrel 1 are fastened in the weapon housing 6, of which only a very small section is shown. The cadence controller 21 has the cylinder 7, in which the gas piston 8 is slidably mounted. With the help of the gas piston 8, the firearm is actuated in a manner known per se and therefore not shown in detail, i.e. after each shot, the next shot is triggered with the help of the gas piston 8 in a series fire. The gas drawn from the weapon barrel 1 with the aid of the transverse bore 2, the gas sampling tube 3 and the transverse bore 4 serves to actuate the gas piston 8, the cadence regulator 21 having the task of controlling the supply of the extracted gas to the gas piston.

Der Aufbau des Kadenzreglers 21 ist nun wie folgt: Der Zylinder 7, in dem der Gaskolben 8 verschiebbar gelagert ist, weist in seinem mittleren Teil den Boden 9 auf, der die Öffnung 10 besitzt. Der Zylinder 7 weist in seinem mittleren Teil die äussere Ringnut 12 auf, in welche die Querbohrung 4 mündet. Der Boden 9 des Zylinders 7 weist parallel zur zentralen Öffnung 10 eine Anzahl Bohrungen 13 auf, die einerseits in die äussere Ringnut 12 münden und andererseits in eine obere Kammer 14. Aus dieser Kammer 14 kann das Gas einerseits ungehindert durch die zentrale Bohrung 10 den Gaskolben 8 beaufschlagen und andererseits durch eine Bohrung 22 eines Einsatzkörpers 23 hindurchströmen, der sich ebenfalls in der oberen Kammer 14 befindet. Am oberen Ende des Zylinders 7 ist ein zylindrisches Rohr 24 befestigt, das vorzugsweise aus Aluminium hergestellt wird. In das obere Ende des zylindrischen Rohres 24 ist ein Zapfen 25 eingeschraubt, in den ein zweites zylindrisches Rohr 26 eingesetzt ist. Dieses zweite zylindrische Rohr 26 ist konzentrisch zum ersten zylindrischen Rohr 24 angeordnet und befindet sich im Inneren des ersten Rohres 24. Am unteren Ende des inneren zylindrischen Rohres 26 ist ein Drosselkörper 27 befestigt. Zwischen dem Drosselkörper 27 und dem Einsatzkörper 23 ist eine Drosselöffnung vorhanden, welche mit Hilfe des im Rohr 24 eingeschraubten Zapfens 25 einstellbar ist. Je tiefer der Zapfen 25 in das Rohr 24 eingeschraubt wird, um so kleiner wird die Drosselöffnung. Die Gase können aus der Bohrung 22 des Einsatzkörpers 23 durch diese Drosselöffnung zwischen die beiden Rohre 24 und 26 gelangen. Das äussere Rohr 24 besitzt an seinem oberen Ende Austrittsöffnungen 28, durch welche die zwischen den beiden Rohren 24, 26 vorhandenen Gase in die Atmosphäre gelangen können. Mit einem Rastorgan 29 kann der Zapfen 25 gegen unbeabsichtigte Drehung gesichert werden.The structure of the cadence regulator 21 is now as follows: The cylinder 7, in which the gas piston 8 is slidably mounted, has the bottom 9 in its central part, which has the opening 10. The cylinder 7 has in its central part the outer annular groove 12, into which the transverse bore 4 opens. The bottom 9 of the cylinder 7 has, parallel to the central opening 10, a number of bores 13 which on the one hand open into the outer annular groove 12 and on the other hand into an upper chamber 14. From this chamber 14 the gas can on the one hand unhindered through the central bore 10 the gas piston 8 act and on the other hand flow through a bore 22 of an insert body 23, which is also located in the upper chamber 14. At the upper end of the cylinder 7, a cylindrical tube 24 is attached, which is preferably made of aluminum. A pin 25, into which a second cylindrical tube 26 is inserted, is screwed into the upper end of the cylindrical tube 24. This second cylindrical tube 26 is arranged concentrically to the first cylindrical tube 24 and is located inside the first tube 24. At the lower end of the inner cylindrical tube 26, a throttle body 27 is attached. Between the throttle body 27 and the insert body 23 there is a throttle opening which can be adjusted with the aid of the pin 25 screwed into the tube 24. The deeper the pin 25 is screwed into the tube 24, the smaller the throttle opening. The gases can pass from the bore 22 of the insert body 23 through this throttle opening between the two tubes 24 and 26. The outer tube 24 has outlet openings 28 at its upper end through which the gases present between the two tubes 24, 26 can reach the atmosphere. With a locking member 29, the pin 25 can be secured against unintentional rotation.

Die Wirkungsweise des Kadenzreglers 21 ist wie folgt:The mode of operation of the cadence regulator 21 is as follows:

Bei jedem Schuss gelangt ein Teil der heissen Abgase durch die Querbohrung 2, das Gasentnahmerohr 3 und die Querbohrung 4 in die Ringnut 12. Von dieser Ringnut 12 gelangen die heissen Abgase durch die Bohrung 13 in die Kammer 14. Aus der Kammer 14 strömen die heissen Abgase einerseits durch die zentrale Bohrung 10 und beaufschlagen den Gaskolben 8 und andererseits strömen die heissen Abgase aus der Kammer 14 zwischen dem Drosselkörper 27 und dem Einsatzkörper 23 hindurch und zwischen dem inneren und äusseren Rohr 26 bzw. 24 hindurch und durch die Austrittsöffnungen in die Atmosphäre. Die heissen Abgase erhitzen dabei sowohl das äussere Rohr 24 als auch das innere Rohr 26. Da aber das äussere Rohr 24 einen grösseren Ausdehnungskoeffizienten besitzt als das innere Rohr 26, wird es sich stärker ausdehnen. Wie aus der Figur ersichtlich, wird dabei der Drosselquerschnitt, d.h. der Spalt zwischen Drosselkörper 27 und Einsatzkörper 23 grösser und es kann mehr Abgas in die Atmosphäre gelangen.With each shot, part of the hot exhaust gases passes through the transverse bore 2, the gas sampling tube 3 and the transverse bore 4 into the annular groove 12. From this annular groove 12, the hot exhaust gases pass through the bore 13 into the chamber 14. The hot ones flow out of the chamber 14 Exhaust gases on the one hand through the central bore 10 and act on the gas piston 8 and on the other hand the hot exhaust gases flow out of the chamber 14 between the throttle body 27 and the insert body 23 and between the inner and outer tubes 26 and 24 and through the outlet openings into the atmosphere . The hot exhaust gases heat both the outer tube 24 and the inner tube 26. However, since the outer tube 24 has a larger coefficient of expansion than the inner tube 26, it will expand more. As can be seen from the figure, the throttle cross section, ie the gap between throttle body 27 and insert body 23, becomes larger and more exhaust gas can get into the atmosphere.

Claims (3)

1. A shot-velocity regulator for gas-operated firearms, having a temperature-dependent flow restricting member (11) which regulates gas pressure by changes in the cross section of a gas conduit and which is movably arranged for changing said cross section and is moved by a device (24, 26) that exhibits a pipe (26), characterised in that the device (26, 24) exhibits an additional pipe (24), the two pipes (24, 26) being arranged concentric to each other, expanding at different rates when hot gases flow through them, and being interconnected at one end, and that the outer pipe (24) possesses a larger coefficient of expansion than the inner pipe (26) and therefore expands more sharply that the inner pipe (26) when heated to the same degree.
2. The shot-velocity regulator according to Claim 1, characterised in that when the two pipes (24, 26) are heated up the throttling area increases.
3. The shot-velocity regulator according to Claim 1, characterised in that the outer pipe (24) is manufactured from aluminium and the inner pipe (26) from steel.
EP85107606A 1984-07-03 1985-06-20 Shot-velocity regulator for gas-operated firearms Expired EP0167067B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH318784 1984-07-03
CH3187/84 1984-07-03

Publications (2)

Publication Number Publication Date
EP0167067A1 EP0167067A1 (en) 1986-01-08
EP0167067B1 true EP0167067B1 (en) 1987-12-09

Family

ID=4250517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107606A Expired EP0167067B1 (en) 1984-07-03 1985-06-20 Shot-velocity regulator for gas-operated firearms

Country Status (7)

Country Link
US (1) US4611525A (en)
EP (1) EP0167067B1 (en)
JP (1) JPS6124999A (en)
BR (1) BR8503166A (en)
DE (1) DE3561177D1 (en)
ES (1) ES8702644A1 (en)
IL (1) IL75677A0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH669839A5 (en) * 1986-03-20 1989-04-14 Oerlikon Buehrle Ag
DE19921804A1 (en) * 1999-05-11 2000-11-16 Dynamit Nobel Ag Attachment device for gas extraction from an automatic weapon
MX2007003286A (en) 2004-09-17 2007-10-16 Colt Defense Llc Firearm having an indirect gas operating system.
DE102005062758B3 (en) * 2005-12-23 2007-06-21 Heckler & Koch Gmbh Gas discharging device for e.g. machine gun barrel, has retainer, sealing section, recess and edge closing gas outlet opening and regulating gas pressure corresponding to barrel temperature in interior of gas cylinder
US20100218671A1 (en) * 2008-12-30 2010-09-02 Magpul Industries Corporation Adjustable and Suppressible Gas Operating System for an Automatic Firearm
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US9766026B2 (en) * 2013-10-21 2017-09-19 Sig Sauer, Inc. Gas operating system for an automatic pistol-caliber firearm
RU2569433C1 (en) * 2014-09-05 2015-11-27 Акционерное общество "Конструкторское бюро приборостроения им. академика А.Г. Шипунова" Weapon bleeding engine
US9863733B2 (en) * 2015-01-13 2018-01-09 Machine Gun Armory, L.L.C. Barrel with integrated gas channel
RU209946U1 (en) * 2019-11-25 2022-03-24 Владимир Александрович Драгочинский GAS OUTLET SYSTEM OF AUTOMATIC FIREARMS
US20230228507A1 (en) * 2022-01-14 2023-07-20 KNS Precision, Inc. Adjustable gas valve for firearm

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FR505576A (en) * 1919-10-07 1920-08-02 Frederic Perdrizet Automatic steam condensate water trap
GB279729A (en) * 1927-05-17 1927-11-03 Bailey Alfred John Improvements in or relating to steam traps or separators
NL110964C (en) * 1955-07-26
DE1108024B (en) * 1956-12-08 1961-05-31 Commissariat Energie Atomique Device for regulating low gas flows
CH511414A (en) * 1969-07-11 1971-08-15 Oerlikon Buehrle Ag Cadence regulator on a gas-operated firearm
JPS5010479A (en) * 1973-06-04 1975-02-03

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm

Also Published As

Publication number Publication date
EP0167067A1 (en) 1986-01-08
ES8702644A1 (en) 1986-12-16
US4611525A (en) 1986-09-16
JPH0557519B2 (en) 1993-08-24
BR8503166A (en) 1986-03-25
ES544798A0 (en) 1986-12-16
JPS6124999A (en) 1986-02-03
DE3561177D1 (en) 1988-01-21
IL75677A0 (en) 1985-10-31

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