EP0228961A2 - Druckgaszuführung in Luftgewehren - Google Patents

Druckgaszuführung in Luftgewehren Download PDF

Info

Publication number
EP0228961A2
EP0228961A2 EP86402873A EP86402873A EP0228961A2 EP 0228961 A2 EP0228961 A2 EP 0228961A2 EP 86402873 A EP86402873 A EP 86402873A EP 86402873 A EP86402873 A EP 86402873A EP 0228961 A2 EP0228961 A2 EP 0228961A2
Authority
EP
European Patent Office
Prior art keywords
valve
gas
chamber
housing
stop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86402873A
Other languages
English (en)
French (fr)
Other versions
EP0228961A3 (en
EP0228961B1 (de
Inventor
Jean Lacam
René Pons
Pierre Simand
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.)
Direction General pour lArmement DGA
Etat Francais
Original Assignee
Direction General pour lArmement DGA
Etat Francais
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 Direction General pour lArmement DGA, Etat Francais filed Critical Direction General pour lArmement DGA
Priority to AT86402873T priority Critical patent/ATE48187T1/de
Publication of EP0228961A2 publication Critical patent/EP0228961A2/de
Publication of EP0228961A3 publication Critical patent/EP0228961A3/fr
Application granted granted Critical
Publication of EP0228961B1 publication Critical patent/EP0228961B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
    • F41B11/62—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas with pressure supplied by a gas cartridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/70—Details not provided for in F41B11/50 or F41B11/60
    • F41B11/72—Valves; Arrangement of valves
    • F41B11/721—Valves; Arrangement of valves for controlling gas pressure for both firing the projectile and for loading or feeding

Definitions

  • the technical sector of the present invention is that of devices for firing various projectiles using compressed gas.
  • valves or shutters
  • a spring which returns the valve to its original position to seal the circuit.
  • This spring must be calibrated to hold account for the gas pressure and it is difficult to obtain an almost constant fraction of gas, to avoid too great a dispersion during the firing. The use of this spring therefore imposes certain constraints and moreover in the event of rupture requires the complete disassembly of the weapon or the device.
  • valve and its spring are eliminated and replaced by a valve consisting of a valve and a seal ensuring the seal of the circuit.
  • the seal is movable in its housing and is compressed between two stops. This results in accelerated wear of this seal and consumption of compressed gas incompatible with the use of a standard reserve of compressed gas.
  • the object of the present invention is to provide a supply device provided with a conventional valve comprising no return spring of the valve, and which can be used with a standard reserve of compressed gas.
  • the invention therefore relates to a device for supplying compressed gas to a weapon of the type comprising a gas reserve, a valve movable in a housing and a valve seat placed in this housing, ensuring the maintenance and guiding of the valve stem, characterized in that it comprises an expansion member interposed between the gas reserve and the valve, consisting of a first expansion chamber in communication with the gas reserve and a second chamber communicating with the valve housing, the two chambers being separated by a calibrated orifice.
  • the volume of the second chamber can be 5 to 7 times less than that of the first chamber.
  • the two chambers can be constituted by hollow cylindrical elements.
  • the cylinder constituting the second chamber can be engaged in the housing of the valve, its end constituting the stop of the valve so that the distance separating the seat and the stop defines the stroke of the valve.
  • the expansion member comprises a sleeve supporting a perforation needle of the gas reserve, said sleeve comprising an open cavity into which the needle opens and intended to receive the collar of the gas reserve.
  • a hollow seal with two lips is placed in the cavity of the sleeve, the first lip being applied to the bottom of the cavity and around the needle and the second being applied to the collar of the gas reserve.
  • An advantage of the present invention lies in the fact that the opening-closing cycle of the valve as a function of time has a square profile. Thus, the total opening and total closing of this valve are almost instantaneous.
  • the weapon can be used in a temperature range between - 15 and + 40 ° C, which is impossible with a valve fitted with a spring.
  • Another advantage lies in the simplification of the mounting of the valve since it is no longer necessary to provide two support points of the conventional spring, one on the valve itself, the other on a fixed point of the 'armed.
  • Another advantage lies in the fact that the fraction of compressed gas delivered is substantially constant during operation, which does not modify the ballistics of the weapon.
  • FIGs 1 and 2 there is shown a partial section of a weapon as described in patent FR-A-2,547,038 comprising a body 1 receiving a launching cannon 2, into which the projectiles are introduced in a known manner using an introduction piston 3 beyond a conduit 4 for the arrival of the compressed gas.
  • the projectiles can be taken one by one from a store (not shown) inserted in a notch 5, and for more precision one can refer to the aforementioned French patent.
  • the weapon also includes a valve 6 sliding in a housing 7 of the body, the rod 8 of which is guided by the valve seat 9.
  • This seat is immobilized by the screw 10 and its tightness with respect to the housing 7 is ensured by means of the O-ring 11 placed, in the figure, to the right of the duct 4.
  • This seat also comprises a duct 12 extending the duct 4, opening into an axial bore 13. The seal between the valve and the seat is ensured by a seal placed in the valve body and the stop 14 which constitutes the seat.
  • the valve used is described in more detail below in relation to FIG. 3.
  • the compressed gas is taken from a standard gas reserve 16, such as for example a 12 g bottle of carbon dioxide compressed at 56.105 Pa at ordinary temperature.
  • This reserve is made integral with the weapon in a known manner.
  • the valve 6 is connected to the bottle 16 via the expansion member 17 consisting of two hollow parts 18 and 19, substantially cylindrical, of different diameter.
  • the part 18, of smaller diameter is engaged in the housing 7 and is immobilized by the screw 20.
  • the sealing at the level of this housing is ensured by the O-ring 21.
  • the two parts 18 and 19 delimit the respective chambers 22 and 23 communicating through the calibrated orifice 24.
  • the free end of the part 19 is closed using a cylindrical sleeve 25 mounted screw-glued. This sleeve, drilled longitudinally, is provided with a perforating needle 26 and comprises a cavity 27 intended to receive the neck of the bottle 16.
  • the needle 26 opens into this cavity and when the bottle 16 is perforated, the latter is applied against the needle using a handle (not shown) to cause the piercing of the lid of the bottle.
  • a hollow seal 28 with two lips is provided, one of which is placed at the bottom of the cavity and around the needle 26 and the other at the outer wall around the neck of the bottle. 16.
  • This structure has two advantages: the hollow shape of the seal makes it possible to absorb the wide variations in length of the bottles which cannot be compensated for by the perforation system, and - during a leak at the perforation, the gas fills the internal cavity 27.
  • the pressure obtained in this cavity increases with the leak and taking into account that the seal 28 is trapped, the tightening of the external lip on the collar of the bottle increases proportionally. This produces a self-sealing.
  • valve 6 is actuated in a known manner, during the firing sequence, by a percussion hammer 29.
  • the operation is as follows.
  • the gas is expanded in the first expansion chamber 23 and then in the second 22.
  • the valve 6 is pressed against the stop 14 of the seat 9. L watertightness is ensured and the weapon is ready to operate.
  • the firing control is conventionally carried out by a trigger (not shown) which releases the percussion hammer 29 after introduction of a projectile into the barrel by the introduction piston 3.
  • FIG. 2 shows a phase of the firing after percussion of the rod 8 by the hammer 29.
  • the valve body is stopped by the stop 30 formed by the end of the part 18.
  • the distance separating the stops 14 and 30 defines the stroke of the valve.
  • the impact of the hammer 29 on the valve results in a rapid displacement of the valve, the extreme position of which is shown diagrammatically in FIG. 2.
  • the quantity of gas required passes from the chamber 22 through the openings formed in the body of valve 6 (described below in relation to the figure 3), the momentarily free space between the stop 14 and the valve 6, the piercing 13, and finally the conduits 12 and 4.
  • the projectile 31, present in the chamber is then propelled out of the barrel 2.
  • the return to position valve 6 is obtained by the combination of two forces: on the one hand, the reaction forces arising from the impact of the valve on the stop 30 and, on the other hand, the gas pressure exerted on the body of the valve which combine to instantly apply the valve to the stopper 14.
  • the tests carried out show that the volume of the chamber 23 can be between 5 and 7 cm3, that of the chamber 22 being 5 to 7 times less.
  • the size of the hole 24 can be between 3 and 5 mm.
  • the rod 8 has a shoulder and a cylindrical rear part.
  • the body 32 is provided with two cylindrical cheeks 33 and 34 separated by an annular rib 35.
  • the cylindrical cheek 33 has openings 36 intended for the passage of the compressed fluid.
  • the diameter of the cheek 33 corresponds to the internal diameter of the housing 7 in which the valve 6 is mounted as indicated above, so that this valve is movable under the action of the compressed fluid acting on the front face of the cheek 33.
  • the cheek 34 is preferably of a diameter less than that of the cheek 33.
  • the body 32 comprises a first conical bore extended by a second cylindrical bore and flat bottom.
  • the diameter of the second bore is provided so as to maintain and block the rear part of the rod, in order to secure the body and the rod by simple diametric tightening.
  • the first bore has a bottom provided with a convex annular bulge and receives an annular seal 37 comprising an axial bore.
  • the dimensions of the seal 37, the rear part of the rod 8 and the first bore are provided in such a way that, when the rod 8 is mounted in the body 32 of the valve, axial and longitudinal compression of the seal 37 is obtained , which causes a slight bulging of the free surface of the seal visible in this figure.
  • FIG. 3 also shows the housing 7 in which the valve is mounted, the seat 9 guiding the rod 8.
  • the external diameter of the cheek 33 is substantially equal to the internal diameter of the housing 7 so as to obtain a guiding the valve body 32 in this housing.
  • the valve is held by means of the rod 8 sliding in the seat 9 and the cheek 33 sliding in the housing 7.
  • the operation of a weapon equipped with this valve is semi-automatic without any borrowing of energy from the gas reserve 16, which reduced its performance.
  • the cheek 33 is provided with openings 36 made at its periphery, but it could also be replaced by calibrated holes made in the thickness of the cheek 33.
  • FIG 4 there is shown the opening opening cycle of a conventional valve equipped with a return spring.
  • the percussion hammer 29 has, when it comes into contact with the stem 8 of the valve, a low axial force.
  • the space-time opening curve has a sinusoidal profile and that the exit of the projectile occurs at the maximum of the curve.
  • the hatched part represents the volume of compressed gas lost which is not used in the propulsion of the projectile.
  • FIG. 5 the opening-closing cycle of the valve according to the invention has also been shown.
  • the valve 6 is not recalled by a spring in the closed position as is the case in all weapons of this type.
  • the shock in the open position by abutment on the face 30 located at a determined distance from the end of the stem 8 of the valve, causes the opening movement to stop and a reversal of direction.
  • the space-time opening curve has a square profile and that the opening and closing are almost instantaneous.
  • the hatched part representing the volume of compressed gas lost is this time much less. It follows that the efficiency is higher with regard to the time / volume ratio of gas released compared to a spring return valve.
  • This configuration of the sealing valve makes it possible to optimize the weapon to obtain the best speed performance of the projectile which characterizes the precision and the range of the weapon and its autonomy, that is to say the number of shots fired for a standard carbon dioxide reserve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Nozzles (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Air Bags (AREA)
  • Toys (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP86402873A 1985-12-27 1986-12-19 Druckgaszuführung in Luftgewehren Expired EP0228961B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402873T ATE48187T1 (de) 1985-12-27 1986-12-19 Druckgaszufuehrung in luftgewehren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8519282A FR2592471B1 (fr) 1985-12-27 1985-12-27 Dispositif d'alimentation en gaz comprime pour armes.
FR8519282 1985-12-27

Publications (3)

Publication Number Publication Date
EP0228961A2 true EP0228961A2 (de) 1987-07-15
EP0228961A3 EP0228961A3 (en) 1987-09-30
EP0228961B1 EP0228961B1 (de) 1989-11-23

Family

ID=9326230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402873A Expired EP0228961B1 (de) 1985-12-27 1986-12-19 Druckgaszuführung in Luftgewehren

Country Status (5)

Country Link
US (1) US4819610A (de)
EP (1) EP0228961B1 (de)
AT (1) ATE48187T1 (de)
DE (1) DE3667099D1 (de)
FR (1) FR2592471B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208416A1 (de) * 1992-03-16 1993-09-23 Mayer Grammelspach Dianawerk Gasdruckwaffe

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258913A (en) * 1991-05-17 1993-02-24 Stephen Robert Wilkins Valve for a pneumatic firearm
US5160795A (en) * 1991-07-29 1992-11-03 Crosman Corporation Gun with pivoting barrel, rotary ammunition cylinder, and double action firing mechanism
US5462042A (en) * 1993-10-29 1995-10-31 Greenwell; Andrew J. Semiautomatic paint ball gun
US5704342A (en) * 1995-05-25 1998-01-06 Thomas G. Kotsiopoulos Compressed gas gun with pressure control arrangement
US5913303A (en) * 1997-10-21 1999-06-22 Kotsiopoulos; Thomas G. Trigger mechanism for compressed gas powered weapons or the like
US6226915B1 (en) 1998-03-25 2001-05-08 Thomas G. Kotsiopoulos Forward angled grip for hand-held weapons and the like
US5993215A (en) * 1998-05-15 1999-11-30 Kotsiopoulos; Thomas G. Training weapon with trigger actuated indicator light
US6314954B1 (en) 2000-05-13 2001-11-13 Chu-Tou Wang Toy gun for firing paint bullets
TW486092U (en) * 2001-04-11 2002-05-01 Guo-Dong Liang Continuous fire mode mechanism of a paint-gun
US8413644B2 (en) 2002-03-06 2013-04-09 Kee Action Sports I Llc Compressed gas gun having reduced breakaway-friction and high pressure dynamic separable seal and flow control and valving device
US7886731B2 (en) * 2002-03-06 2011-02-15 Kee Action Sports I Llc Compressed gas gun having reduced breakaway-friction and high pressure dynamic separable seal flow control device
US7237545B2 (en) 2002-03-06 2007-07-03 Aj Acquisition I Llc Compressed gas-powered projectile accelerator
ES2302531T3 (es) * 2003-12-30 2008-07-16 Alfredo Benetti Aparato para lanzar pelotas para entrenamiento deportivo.
US7913679B2 (en) * 2004-06-10 2011-03-29 Kee Action Sports I Llc Valve assembly for a compressed gas gun
US7624726B2 (en) * 2004-07-13 2009-12-01 Kee Action Sports I Llc Valve for compressed gas gun
US20070028909A1 (en) * 2004-12-15 2007-02-08 National Paintball Supply, Inc. Paintball marker with ball velocity control
US7712463B2 (en) * 2006-05-25 2010-05-11 Kee Action Sports I Llc Self-regulating valve assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1067338B (de) *
GB607444A (en) * 1946-02-04 1948-08-31 Leslie Wesley Improvements in or relating to pistols
FR941917A (fr) * 1947-02-17 1949-01-25 Distributeur d'air comprimé pour lancement d'un projectile dans un canon forain ou autre
FR1553810A (de) * 1966-10-14 1969-01-17
US3548802A (en) * 1968-07-22 1970-12-22 Rudolph C Green Pellet firing mechanism and fluid valve therefor
US4116193A (en) * 1975-12-27 1978-09-26 Sharp Rifle Company, Ltd. Pressurized gas or air operated repeater rifle

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1506995A (en) * 1924-02-09 1924-09-02 Paul William Air shotgun
US2525082A (en) * 1947-10-20 1950-10-10 Wilbur G Sherman Pneumatic bottle shooting gun
US2881752A (en) * 1954-10-11 1959-04-14 Carl E Blahnik Gas actuated guns
FR1113966A (fr) * 1954-11-05 1956-04-06 Fusil, revolver ou arme analogue à air comprimé
US2817328A (en) * 1956-02-10 1957-12-24 Fred H Gale Semi-automatic compressed fluid gun
US3572310A (en) * 1968-02-02 1971-03-23 Kensuke Chiba Compressed gas gun and valve therefor
US3756284A (en) * 1970-08-28 1973-09-04 Uop Instr Division Three-way, self-closing valve unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1067338B (de) *
GB607444A (en) * 1946-02-04 1948-08-31 Leslie Wesley Improvements in or relating to pistols
FR941917A (fr) * 1947-02-17 1949-01-25 Distributeur d'air comprimé pour lancement d'un projectile dans un canon forain ou autre
FR1553810A (de) * 1966-10-14 1969-01-17
US3548802A (en) * 1968-07-22 1970-12-22 Rudolph C Green Pellet firing mechanism and fluid valve therefor
US4116193A (en) * 1975-12-27 1978-09-26 Sharp Rifle Company, Ltd. Pressurized gas or air operated repeater rifle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208416A1 (de) * 1992-03-16 1993-09-23 Mayer Grammelspach Dianawerk Gasdruckwaffe

Also Published As

Publication number Publication date
EP0228961A3 (en) 1987-09-30
ATE48187T1 (de) 1989-12-15
FR2592471A1 (fr) 1987-07-03
DE3667099D1 (en) 1989-12-28
EP0228961B1 (de) 1989-11-23
US4819610A (en) 1989-04-11
FR2592471B1 (fr) 1989-10-13

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