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EP1541957B1 - Air pressuring pump for air gun - Google Patents

Air pressuring pump for air gun Download PDF

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Publication number
EP1541957B1
EP1541957B1 EP04300852A EP04300852A EP1541957B1 EP 1541957 B1 EP1541957 B1 EP 1541957B1 EP 04300852 A EP04300852 A EP 04300852A EP 04300852 A EP04300852 A EP 04300852A EP 1541957 B1 EP1541957 B1 EP 1541957B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder head
head
gas
replica
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
EP04300852A
Other languages
German (de)
French (fr)
Other versions
EP1541957A1 (en
Inventor
Bertrand Marsac
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.)
Cybergun SA
Original Assignee
Cybergun SA
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 Cybergun SA filed Critical Cybergun SA
Publication of EP1541957A1 publication Critical patent/EP1541957A1/en
Application granted granted Critical
Publication of EP1541957B1 publication Critical patent/EP1541957B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F41B11/70—Details not provided for in F41B11/50 or F41B11/60
    • F41B11/71—Electric or electronic control systems, e.g. for safety purposes
    • 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
    • F41B11/68—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas the gas being pre-compressed before firing
    • F41B11/681—Pumping or compressor arrangements therefor
    • 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
    • F41B11/50—Magazines for compressed-gas guns; Arrangements for feeding or loading projectiles from magazines
    • F41B11/57—Electronic or electric systems for feeding or loading
    • 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
    • F41B11/64—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot
    • 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
    • F41B11/80—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes
    • F41B11/89—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes for toys

Definitions

  • the invention relates to a gas or compressed air pump for a replica of a ball-blasting weapon of the "Air Soft Gun ®” or “Soft Air ®” type. More specifically, the invention relates to the piston head and the cylinder head of the gas pump which have mutually adapted shapes for better exhausting of gas or compressed air to the barrel of the weapon replica.
  • the invention finds applications in the field of the weapon replica, long or point, operating spring with compression of air or compression of another gas, with a manual or electrical arming.
  • the invention applies, in particular, to the replica weapons whose projectiles are plastic balls, very light, with a diameter of about 6 mm.
  • a gas pump for a replica of a blasting gun having the features of the preamble of claim 1 is known from US 3 958 550 A.
  • a gear system 5 in the weapon body acts on the pump 6 which then evacuates the air or gas contained in said pump to the barrel 1 so as to project the plastic ball out of the barrel of the weapon replica.
  • FIG 2 shows a conventional pump system commonly found in most weapon replicas.
  • This pump system 6 comprises a cylinder 7 which forms the walls of a compartment 72 for holding the gas.
  • the cylinder 7 comprises a cylinder head 71 which forms a side wall, on the barrel side 1, of said compartment 72.
  • This pump system 6 also comprises a piston 8 provided with a piston head 81. The piston is pushed by a spring of compression 11 inside the compartment 72, towards the cylinder head 71.
  • FIG. 2 shows two possible positions of the piston in the compartment 72: the upper part of the piston is shown in its closed position, that is to say when the piston is against the cylinder head and the lower part shows the open position of the piston, that is to say when the piston is retained by the compression spring 11. These two positions will be described in detail later.
  • the movement of the piston head 81, driven by the piston assembly 8, towards the cylinder head 71 provides a compression of the gas in the compartment 72.
  • This compressed gas which then seeks to escape from the compartment 72 , engulfs in an ejection nozzle 9 connecting the cylinder head 71 and the barrel 1.
  • This nozzle 9 is generally cylindrical and housed inside the central orifice 73 of the cylinder head. It has a diameter at most equal to that of the balls so that the balls can not enter the tip.
  • the tip may be of different shapes, depending, in particular, the model of the replica weapon, for example if it is an electric model or manual.
  • the tip 9 has a fixed portion 9a integral with the cylinder head 71 and a movable portion 9b connected to the drive fork of the loading tip which ensures the linear movement before /back .
  • This range being itself driven by a pin on one of the gear wheels of the gear system and a return spring.
  • the tip 9 is completely fixed, but the pump being movable (because located inside the bolt which is movable), the loading of the ball in the barrel is carried out in the same way. The ball is then propelled out of the barrel in the same way under the effect of the gas.
  • the compartment 72 has a large volume and the gas which is in this volume is decompressed.
  • the compression spring 11 is decompressed, released as a result of the action on the trigger, it pushes the piston 8 in the cylinder 7 to the cylinder head 71, that is to say in a closed position, thus reducing the volume of the compartment 72 and thereby creating the compressed gases which, evacuated by the nozzle 9, eject the ball.
  • the piston 8 is then driven by a rack 84 back again by compressing the spring to prepare the next shot. This movement of the piston 8 has the effect of compressing the gas in the compartment 72.
  • the cylinder head 71 is flat. It comprises, at its center, a gas evacuation orifice 73, in which is housed an end of the ejection nozzle 9. The gas compressed by the piston 8 in the compartment 72 then escapes from said compartment by this
  • the shape of the piston head 81 is adapted to the shape of the cylinder head 71.
  • the piston head 81 is therefore flat, like the cylinder head. In the closed position, the piston head 81 and the cylinder head 71 are therefore in mechanical contact with each other.
  • replica automatic electric weapons it is the engine that suffers the most because of the existence of a spring with high stiffness. It requires a more powerful engine, which consumes more power. However, this engine is powered by a battery, whose size is limited by the available volume for the battery in the replica weapon. The autonomy of engine of the replica weapon is greatly reduced by the use of a spring with high stiffness. In addition, the reduction box composed of several pinions and toothed wheels tire very quickly and the teeth eventually break.
  • the invention provides a gas pump or compressed air in which the piston head has a conical shape which fits into the cylinder head whose shape is adapted to that of the piston head.
  • the cylinder head forms a funnel allowing the compressed gas to be directed to the central orifice of the cylinder head and thus to the ejection nozzle.
  • the funnel shape of the cylinder head associated with the conical shape of the piston head considerably reduces the resistance encountered by the gas to escape from the gas holding compartment by the ejection nozzle.
  • This pump is characterized in that, on the one hand, the piston head has a conical shape and, on the other hand, the cylinder head has a funnel shape, complementary to the conical shape of the piston head.
  • the cylinder head and the piston head have shapes facilitating the thrust of the compressed gas towards the ejection nozzle.
  • a compressed air pump will be described, it being understood that any other gas usually used in the pumps of the replica weapons can also be used in the pump of the invention.
  • FIG. 3 there is shown a side view, in section, of the compressed air pump of the invention.
  • This FIG. 3 shows a cylinder 7 forming a compartment 72 for retaining air.
  • This cylinder 7 is provided with a cylinder head 71 in the center of which an orifice 73 allows the evacuation of air to the barrel of the replica weapon.
  • One end of an ejection tip 9, identical to that of the prior art, is housed near this central orifice 73.
  • This FIG. 3 also shows a piston 8 able to move inside the compartment 72.
  • the piston 8 has a conical piston head 81, that is to say which has the shape of a cone whose top is flattened.
  • the cylinder head 71 has a funnel shape. In other words, the cylinder head forms a conical neck whose center is the orifice 73.
  • the shape of the piston head 81 is adapted to fit into the funnel shape of the cylinder head 71.
  • the cylinder head 71 is fixed in the cylinder 7. It comprises a central orifice 73.
  • the ejection nozzle 9, in the invention, has a first end which passes through the orifice 73 to open into the compartment 72. first end is housed in the cylinder head, near said orifice 73. The second end opens into the barrel of the replica weapon.
  • the nozzle 9 is inserted into the cylinder head by overmolding.
  • the ejection nozzle 9 is intended to pass the compressed air from the air compression compartment 72 to the barrel in which a plastic ball is pending expulsion.
  • the flow of compressed air ensures the expulsion of the ball.
  • the ejection tip In the case of a replica electrically charged weapon, the ejection tip is movable, the arming of the ball being done by a movement of this tip driven by the drive fork. This displacement is represented in FIG. 3 by arrows. In the case of an electric model, the displacement of the ejection tip, also called the loading tip, makes it possible to push the ball into the barrel at the time of firing.
  • the cylinder head 71 is sealed to the air inside the cylinder 7 by means of an O-ring 74 placed in a housing of the cylinder head.
  • the piston head 81 has a first flange 89 and a second flange 90.
  • the second flange 90 has a conical shape. It is this flange which is in contact with the compressed air.
  • the first flange 89 is located at the rear of the second flange. It serves as an interface between the piston head 81 and the other elements of the piston 8. In particular, the first flange 89 is fixed on the rack 84 for driving the piston.
  • a screw 85 passes through the second flange 90 and the first flange 89.
  • This screw 85 is screwed into a nut 86, against which the spring 11 is supported.
  • This nut 86 has a rotational locking pin 83 which is inserted into the first flange 89 of the piston. This locking pin 83 makes it possible to avoid any rotation of the piston 8 inside the cylinder 7.
  • An O-ring 88 placed between the first flange 89 and the second flange 90 of the piston, seals between the piston and the cylinder.
  • This O-ring 88 is placed in a housing 91 made in the first flange 89, whose volume is greater than the diameter of the seal.
  • the pump system also comprises a damper 87 located between the piston head 81 and the cylinder head 71.
  • This damper 87 may be an O-ring. Its role is to dampen the contact between the piston head and the cylinder head, at the moment when the piston head collapses against the cylinder head. Indeed, given the shape of the cylinder head and the piston head, the compressed air is released very quickly in the ejection nozzle, so that the speed of the piston arriving on the cylinder head is relatively important.
  • This damper, or damping gasket, 87 makes it possible to avoid violent mechanical contact between the piston head and the cylinder head, which could damage one or other of the heads.
  • the damping gasket 87 thus provides a minimum necessary distance between the cylinder head and the piston head to avoid a shock of the piston head on the cylinder head.
  • the piston and the spring drive the piston head towards the cylinder head.
  • the air in the air holding compartment 72 is then compressed. Due to the shape of the piston and cylinder heads, the flow of compressed air is directed directly to the orifice 73 and therefore to the ejection nozzle 9. The air flow is thus concentrated in a global mass towards the center of the cylinder head.
  • This pump therefore considerably reduces the resistance encountered by the air when it escapes through the ejection nozzle.
  • This resistance is further reduced by using means for swirling the airflow to the ejection tip.
  • These means consist of fins placed on the surface of the cylinder head.
  • the piston head then has slots or notches for receiving these fins, that is to say to fit around the fins, when the piston head is close to the cylinder head.
  • Figures 4A and 4B show sectional views of the cylinder head of the invention. More specifically, Figure 4B shows a side sectional view of the cylinder head. This figure shows the ejection tip 9 which ends in the central orifice 73 of the cylinder head 71. In the embodiment of FIG. 4B, the cylinder head comprises fins 75 intended to swirl the airflow to the central hole and thus to the ejector tip. This figure also shows the O-ring 87, placed at the front of the cylinder head so that the piston head and the cylinder head can not come into direct contact with each other, when the whole compressed air was evacuated.
  • FIG. 4A shows a front sectional view of the cylinder head 71.
  • the cylinder head 71 on which are fixed different fins 75.
  • these fins are in number six. Their number, their shape and their location are chosen so as to cause a vortex of the flow of compressed air towards the center of the cylinder head, that is to say towards the orifice 73.
  • These fins can be fixed on the cylinder head by any known fastening means. They can also be molded with the cylinder head.
  • FIG. 5A there is shown a side sectional view of the piston head of the invention. This view shows the end of the piston head 81 with its second flattened cone flange 90 and its first flange 89, both separated by a seal 88. It also shows the assembly screw 85 which passes through the piston head to fix the various elements of the piston together.
  • Figure 5B shows a front sectional view of the piston head 81.
  • This Figure 5B shows six slots 93 for receiving the six fins of the cylinder head. These slots 93 have dimensions and adapted shapes to fit around the fins. These slots are made in the second flange 90, for example during the molding of said flange.
  • FIG. 5B also shows six air passage orifices 92 towards the seal 88, an orifice 92 being made at the bottom of each slot 93. It should be noted, however, that the number and location of the orifices 93 Airflow may vary depending on the type of gasket used and the model of the weapon replica.
  • FIG. 6 shows schematically the air flow obtained inside the cylinder head.
  • This airflow is schematized by arrows.
  • this flow of compressed air is directed by the fins 75 towards the center of the cylinder head 71, which forms, in the vicinity of the central orifice 73, a vortex ensuring a greater ejection fast flow of air into the ejection tip.
  • the compressed air between the fins 75 increases in speed and begins to rotate converging towards the center of the cylinder head, thereby creating a centripetal vortex engulfing the ejection tip, which increases substantially the speed of the air and therefore the energy of the flow intended to propel the ball at the entrance of the barrel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Nozzles (AREA)
  • Reciprocating Pumps (AREA)
  • Steroid Compounds (AREA)
  • Manipulator (AREA)

Abstract

The pump has a cylinder (7) with a gas storage compartment (72) and a funnel shaped cylinder head (71). A gas ejecting nozzle (9) has two ends opening in the compartment and in a barrel of a replica gun, respectively. A piston (8) has a piston head moving in the compartment to compress the gas and having a conical shape corresponding to the funnel shaped head. The head (71) permits to direct the compressed gas towards the nozzle.

Description

Domaine de l'inventionField of the invention

L'invention concerne une pompe à gaz ou air comprimé pour réplique d'arme à projection de billes du type "Air Soft Gun ® "ou "Soft Air ® ". L'invention concerne, plus précisément, la tête de piston et la tête de cylindre de la pompe à gaz qui ont des formes, adaptées l'une à l'autre, pour assurer un meilleur échappement du gaz ou de l'air comprimé vers le canon de la réplique d'arme.The invention relates to a gas or compressed air pump for a replica of a ball-blasting weapon of the "Air Soft Gun ®" or "Soft Air ®" type. More specifically, the invention relates to the piston head and the cylinder head of the gas pump which have mutually adapted shapes for better exhausting of gas or compressed air to the barrel of the weapon replica.

L'invention trouve des applications dans le domaine de la réplique d'arme, longue ou de point, fonctionnant à ressort avec compression d'air ou compression d'un autre gaz, avec un armement manuel ou électrique. L'invention s'applique, en particulier, aux répliques d'armes dont les projectiles sont des billes en matière plastique, très légères, d'un diamètre environ 6 mm.The invention finds applications in the field of the weapon replica, long or point, operating spring with compression of air or compression of another gas, with a manual or electrical arming. The invention applies, in particular, to the replica weapons whose projectiles are plastic balls, very light, with a diameter of about 6 mm.

Etat de la techniqueState of the art

Une pompe à gaz pour réplique d'arme à projection de billes ayant les caractéristiques du préambule de la revendication 1 est connu du document US 3 958 550 A.A gas pump for a replica of a blasting gun having the features of the preamble of claim 1 is known from US 3 958 550 A.

Dans le domaine des répliques d'armes, de nombreux modèles d'armes à feu sont reproduits dans le but de réaliser des jouets, pour enfants ou pour adultes. Ces répliques d'armes sont généralement des armes qui projettent, à la place des balles ou des plombs des armes réelles, des projectiles en plastiques tels que des billes d'un diamètre de l'ordre de 6 millimètres. Ces billes en plastique sont éjectées de la réplique d'arme au moyen d'un système de pompe à gaz ou à air comprimé. Un exemple de réplique d'arme, muni d'un système classique de pompe à gaz comprimé est représenté sur la figure 1. Cette réplique d'arme comporte, comme toute réplique d'arme :

  • un corps d'arme comprenant notamment un cylindre et un piston, décrits ultérieurement,
  • un canon 1 duquel est éjecté la bille 10,
  • une crosse 2 autour de laquelle le joueur place sa main,
  • un pontet 3 dans lequel le joueur introduit son index,
  • une détente 4, mobile à l'intérieur du pontet et sur laquelle le joueur appuie pour déclencher le tir d'une bille en plastique 10, et
  • lorsque l'arme est manuelle, une touche d'armement (non visible sur la figure 1) permettant de réarmer la réplique d'arme avec un nouvelle bille stockée dans un chargeur 12.
In the field of replica weapons, many models of firearms are reproduced for the purpose of making toys for children or adults. These replica weapons are usually weapons that project, instead of bullets or pellets real weapons, projectiles plastic such as beads with a diameter of about 6 millimeters. These plastic balls are ejected from the replica weapon by means of a gas pump or compressed air system. An example of a replica weapon, equipped with a conventional compressed gas pump system, is shown in FIG. 1. This weapon replica comprises, like any replica weapon:
  • a weapon body including a cylinder and a piston, described later,
  • a barrel 1 from which the ball 10 is ejected,
  • a stick 2 around which the player places his hand,
  • a trigger guard 3 in which the player introduces his index,
  • a trigger 4, movable inside the trigger guard and on which the player presses to trigger the firing of a plastic ball 10, and
  • when the weapon is manual, an arming key (not visible in Figure 1) to rearm the weapon replica with a new ball stored in a charger 12.

Lorsque le joueur appuie sur la détente 4, un système d'engrenage 5, dans le corps d'arme, agit sur la pompe 6 qui évacue alors l'air ou le gaz contenu dans ladite pompe vers le canon 1 de façon à projeter la bille en plastique hors du canon de la réplique d'arme.When the player presses the trigger 4, a gear system 5, in the weapon body, acts on the pump 6 which then evacuates the air or gas contained in said pump to the barrel 1 so as to project the plastic ball out of the barrel of the weapon replica.

La figure 2 représente un système de pompe classique que l'on trouve couramment dans la plupart des répliques d'armes. Ce système de pompe 6 comporte un cylindre 7 qui forme les parois d'un compartiment 72 de retenue du gaz. Le cylindre 7 comporte une tête de cylindre 71 qui forme une paroi latérale, coté canon 1, dudit compartiment 72. Ce système de pompe 6 comporte aussi un piston 8 muni d'une tête de piston 81. Le piston est poussé par un ressort de compression 11 à l'intérieur du compartiment 72, vers la tête de cylindre 71.Figure 2 shows a conventional pump system commonly found in most weapon replicas. This pump system 6 comprises a cylinder 7 which forms the walls of a compartment 72 for holding the gas. The cylinder 7 comprises a cylinder head 71 which forms a side wall, on the barrel side 1, of said compartment 72. This pump system 6 also comprises a piston 8 provided with a piston head 81. The piston is pushed by a spring of compression 11 inside the compartment 72, towards the cylinder head 71.

La figure 2 montre deux positions possibles du piston dans le compartiment 72 : la partie supérieure du piston est montrée dans sa position fermée, c'est-à-dire lorsque le piston est contre la tête de cylindre et la partie inférieure montre la position ouverte du piston, c'est-à-dire lorsque le piston est retenu par le ressort de compression 11. Ces deux positions seront décrites en détail ultérieurement.FIG. 2 shows two possible positions of the piston in the compartment 72: the upper part of the piston is shown in its closed position, that is to say when the piston is against the cylinder head and the lower part shows the open position of the piston, that is to say when the piston is retained by the compression spring 11. These two positions will be described in detail later.

Le mouvement de la tête de piston 81, entraînée par l'ensemble du piston 8, vers la tête de cylindre 71 assure une compression du gaz se trouvant dans le compartiment 72. Ce gaz comprimé, qui cherche alors à s'échapper du compartiment 72, s'engouffre dans un embout d'éjection 9 reliant la tête de cylindre 71 et le canon 1. Cet embout 9 est généralement cylindrique et logé à l'intérieur de l'orifice central 73 de la tête de cylindre. Il a un diamètre au plus égal à celui des billes de façon à ce que les billes ne puissent pénétrer dans l'embout. L'embout peut être de formes différentes, en fonction, notamment, du modèle de la réplique d'arme, par exemple s'il s'agit d'un modèle électrique ou manuel.The movement of the piston head 81, driven by the piston assembly 8, towards the cylinder head 71 provides a compression of the gas in the compartment 72. This compressed gas, which then seeks to escape from the compartment 72 , engulfs in an ejection nozzle 9 connecting the cylinder head 71 and the barrel 1. This nozzle 9 is generally cylindrical and housed inside the central orifice 73 of the cylinder head. It has a diameter at most equal to that of the balls so that the balls can not enter the tip. The tip may be of different shapes, depending, in particular, the model of the replica weapon, for example if it is an electric model or manual.

Dans les modèles de répliques d'armes électriques, l'embout 9 comporte une partie fixe 9a solidaire de la tête de cylindre 71 et une partie mobile 9b reliée à la fourchette d'entraînement de l'embout de chargement qui assure le mouvement linéaire avant/arrière . Cette fourchette étant elle-même entraînée par un ergot se trouvant sur une des roues dentée du système d'engrenage et un ressort de rappel. Ainsi, avant que la tête de piston ne vienne s'écraser contre la tête de cylindre, la partie mobile 9b de l'embout 9 est poussée vers le canon 1, ce qui pousse la bille située à la tête du chargeur vers l'entrée du canon dans le joint du canon. Parallèlement, le gaz évacué hors du compartiment 72 traverse l'embout 9, atteint la bille et la propulse hors du canon.In the models of electric weapon replicas, the tip 9 has a fixed portion 9a integral with the cylinder head 71 and a movable portion 9b connected to the drive fork of the loading tip which ensures the linear movement before /back . This range being itself driven by a pin on one of the gear wheels of the gear system and a return spring. Thus, before the piston head comes crashing against the cylinder head, the movable portion 9b of the nozzle 9 is pushed towards the barrel 1, which pushes the ball located at the head of the charger towards the entrance cannon in the barrel joint. In parallel, the gas discharged out of the compartment 72 passes through the nozzle 9, reaches the ball and propels it out of the barrel.

Dans les modèles manuels, l'embout 9 est totalement fixe, mais la pompe étant mobile (car située à l'intérieur de la culasse qui est mobile), le chargement de la bille dans le canon s'effectue de la même façon . La bille est alors propulsée hors du canon de la même façon sous l'effet du gaz.In manual models, the tip 9 is completely fixed, but the pump being movable (because located inside the bolt which is movable), the loading of the ball in the barrel is carried out in the same way. The ball is then propelled out of the barrel in the same way under the effect of the gas.

Autrement dit, lorsque le piston 8 est en position ouverte, c'est-à-dire que le ressort de compression 11 est comprimé, maintenant le piston 8 vers l'arrière de l'arme (c'est-à-dire vers la crosse, opposée du canon), alors le compartiment 72 a un large volume et le gaz qui se trouve dans ce volume est décomprimé. Lorsque le ressort de compression 11 est décomprimé, libéré à la suite de l'action sur la détente, il pousse le piston 8 dans le cylindre 7 vers la tête cylindre 71, c'est-à-dire dans une position fermée, réduisant ainsi le volume du compartiment 72 et créant ainsi les gaz comprimés qui, s'évacuant par l'embout 9, éjecteront la bille. Le piston 8 est ensuite entraîné par une crémaillère 84 de nouveau vers l'arrière en comprimant le ressort pour préparer le tir suivant. Ce mouvement du piston 8 a pour effet de comprimer le gaz dans le compartiment 72.In other words, when the piston 8 is in the open position, that is to say that the compression spring 11 is compressed, keeping the piston 8 towards the rear of the weapon (that is to say towards the stick, opposite of the barrel), then the compartment 72 has a large volume and the gas which is in this volume is decompressed. When the compression spring 11 is decompressed, released as a result of the action on the trigger, it pushes the piston 8 in the cylinder 7 to the cylinder head 71, that is to say in a closed position, thus reducing the volume of the compartment 72 and thereby creating the compressed gases which, evacuated by the nozzle 9, eject the ball. The piston 8 is then driven by a rack 84 back again by compressing the spring to prepare the next shot. This movement of the piston 8 has the effect of compressing the gas in the compartment 72.

Dans une pompe à gaz classique, comme celle de la figure 2, la tête de cylindre 71 est plane. Elle comporte, en son centre, un orifice 73 d'évacuation du gaz, dans lequel est logé une extrémité de l'embout d'éjection 9. Le gaz comprimé par le piston 8 dans le compartiment 72 s'échappe alors dudit compartiment par cet embout 9. La forme de la tête de piston 81 est adaptée à la forme de la tête de cylindre 71. La tête de piston 81 est donc plane, comme la tête de cylindre. En position fermée, la tête de piston 81 et la tête de cylindre 71 sont donc en contact mécanique l'une avec l'autre.In a conventional gas pump, like that of Figure 2, the cylinder head 71 is flat. It comprises, at its center, a gas evacuation orifice 73, in which is housed an end of the ejection nozzle 9. The gas compressed by the piston 8 in the compartment 72 then escapes from said compartment by this The shape of the piston head 81 is adapted to the shape of the cylinder head 71. The piston head 81 is therefore flat, like the cylinder head. In the closed position, the piston head 81 and the cylinder head 71 are therefore in mechanical contact with each other.

Or, comme la tête du piston et la tête du cylindre sont planes, le flux d'air comprimé s'échappe du compartiment de façon aléatoire. En d'autres termes, lorsque la tête du piston s'approche de la tête du cylindre, le flux de gaz comprimé a du mal à s'échapper par l'embout 9 dont la dimension est petite devant les parties planes des têtes de piston et t de cylindre. En effet, du fait de la réduction drastique du diamètre à la sortie du flux de gaz vers le canon par rapport au diamètre bien plus important du cylindre, la plus grande partie du gaz comprimé se trouve bloquée contre le mur que forme la tête de cylindre plane. Le flux de gaz cherche à s'échapper par l'embout d'éjection 9 mais il a du mal car il se crée des turbulences contradictoires importantes. Ce phénomène est d'autant plus important que la différence entre le diamètre du cylindre et le diamètre de l'embout d'éjection est grand. En effet, si on augmente la taille de la pompe de façon à augmenter la quantité de gaz comprimé dans le compartiment, et donc la force de propulsion de la bille, on n'augmente pas pour autant le diamètre de l'embout d'éjection puisque ce diamètre est fonction du diamètre de la bille. Ainsi, plus on augmente le diamètre de la pompe et plus grande est la disproportion entre la taille de l'embout d'éjection et la surface plane des têtes de piston et de cylindre. En conséquence, le piston est ralenti dans sa course à l'approche de la tête de cylindre, ce qui provoque des pertes sensibles du rendement de la pompe. Les pertes dues aux parties planes de la pompe sont donc encore plus grandes, en proportion, lorsque les dimensions de la pompe sont grandes.However, as the piston head and the cylinder head are flat, the flow of compressed air escapes from the compartment randomly. In other words, when the piston head approaches the cylinder head, the flow of Compressed gas has difficulty escaping through the nozzle 9 whose size is small in front of the flat portions of the piston heads and cylinder t. In fact, because of the drastic reduction of the diameter at the outlet of the gas flow towards the barrel with respect to the much larger diameter of the cylinder, the greater part of the compressed gas is blocked against the wall formed by the cylinder head. plane. The flow of gas seeks to escape through the ejection nozzle 9 but it is difficult because it creates significant conflicting turbulence. This phenomenon is all the more important as the difference between the diameter of the cylinder and the diameter of the ejection tip is large. Indeed, if we increase the size of the pump so as to increase the amount of compressed gas in the compartment, and therefore the propulsion force of the ball, it does not increase the diameter of the ejection tip since this diameter is a function of the diameter of the ball. Thus, the greater the diameter of the pump and the greater the disproportion between the size of the ejection tip and the flat surface of the piston and cylinder heads. As a result, the piston is slowed down as it approaches the cylinder head, which causes significant losses in the efficiency of the pump. The losses due to the flat parts of the pump are therefore even larger, in proportion, when the dimensions of the pump are large.

Pour palier à ce problème, les fabricants choisissent généralement d'utiliser un ressort de compression plus fort, c'est-à-dire de plus grande raideur, de façon à compenser les pertes dues aux turbulences. Mais ce ressort de plus grande raideur nécessite une force d'appui plus importante sur la touche d'armement.To overcome this problem, manufacturers generally choose to use a stronger compression spring, that is to say, greater stiffness, so as to compensate for losses due to turbulence. But this spring of greater stiffness requires a greater support force on the arming key.

C'est pour cette raison que les répliques d'armes à ressort, à armement manuel posent un véritable problème aux utilisateurs qui ont peu de force et, en particulier aux femmes, ou aux enfants uniquement lorsqu'il s'agit de modèles ayant un agrément « jouet ». En effet, ces derniers sont des difficultés pour armer car le ressort est raide, ce qui peut provoquer des incidents de tir voir un enrayement.It is for this reason that replicas of spring loaded weapons with manual arming pose a real problem to users with little strength, and especially to women, or children only when it comes to models with a "toy" approval. Indeed, these are difficulties to arm because the spring is stiff, which can cause shooting incidents see a containment.

En ce qui concerne les répliques d'armes automatiques électriques, c'est le moteur qui souffre le plus du fait de l'existence d'un ressort à grande raideur. Il faut alors un moteur plus puissant, qui consomme plus de courant. Or, ce moteur est alimenté par une batterie, dont la taille est limitée par le volume disponible, pour la batterie, dans la réplique d'arme. L'autonomie du moteur de la réplique d'arme est donc largement réduite par l'utilisation d'un ressort à forte raideur. De plus, la boîte de réduction composée de plusieurs pignons et roues dentées fatiguent très vite et les dentures finissent par casser.Regarding replica automatic electric weapons, it is the engine that suffers the most because of the existence of a spring with high stiffness. It requires a more powerful engine, which consumes more power. However, this engine is powered by a battery, whose size is limited by the available volume for the battery in the replica weapon. The autonomy of engine of the replica weapon is greatly reduced by the use of a spring with high stiffness. In addition, the reduction box composed of several pinions and toothed wheels tire very quickly and the teeth eventually break.

Exposé de l'inventionPresentation of the invention

L'invention a justement pour but de remédier aux inconvénients des techniques précédentes. A cette fin, l'invention propose une pompe à gaz ou air comprimé dans laquelle la tête de piston a une forme conique qui vient s'emboîter dans la tête de cylindre dont la forme est adaptée à celle de la tête de piston. La tête de cylindre forme un entonnoir permettant au gaz comprimé d'être dirigé vers l'orifice central de la tête de cylindre et donc vers l'embout d'éjection. La forme en entonnoir de la tête de cylindre associée à la forme conique de la tête de piston permet de diminuer considérablement la résistance rencontrée par le gaz pour s'échapper du compartiment de retenue de gaz, par l'embout d'éjection.The purpose of the invention is precisely to remedy the drawbacks of the preceding techniques. To this end, the invention provides a gas pump or compressed air in which the piston head has a conical shape which fits into the cylinder head whose shape is adapted to that of the piston head. The cylinder head forms a funnel allowing the compressed gas to be directed to the central orifice of the cylinder head and thus to the ejection nozzle. The funnel shape of the cylinder head associated with the conical shape of the piston head considerably reduces the resistance encountered by the gas to escape from the gas holding compartment by the ejection nozzle.

De façon plus précise, l'invention concerne une pompe à gaz, pour réplique d'arme à projection de billes, comportant :

  • un cylindre formant un compartiment de retenue d'un gaz et muni d'une tête de cylindre formant une paroi latérale dudit compartiment de retenue, ladite tête de cylindre comprenant un orifice central,
  • un embout d'éjection du gaz ayant une première extrémité débouchant dans le compartiment de retenue et une seconde extrémité débouchant dans un canon de la réplique d'arme, et
  • un piston muni d'une tête de piston mobile dans le compartiment de retenue et apte à comprimer le gaz dans ledit compartiment.
More precisely, the invention relates to a gas pump, for a replica of a ball projection weapon, comprising:
  • a cylinder forming a gas retaining compartment and provided with a cylinder head forming a side wall of said retaining compartment, said cylinder head including a central orifice,
  • a gas ejection nozzle having a first end opening into the containment compartment and a second end opening into a barrel of the weapon replica, and
  • a piston provided with a movable piston head in the holding compartment and adapted to compress the gas in said compartment.

Cette pompe se caractérise par le fait que, d'une part, la tête de piston a une forme conique et, d'autre part, la tête de cylindre a une forme en entonnoir, complémentaire de la forme conique de la tête de piston.This pump is characterized in that, on the one hand, the piston head has a conical shape and, on the other hand, the cylinder head has a funnel shape, complementary to the conical shape of the piston head.

Avantageusement, la pompe à gaz de l'invention peut comporter l'une des caractéristiques suivantes :

  • La tête de cylindre comporte des ailettes de déflexion du gaz,
  • La tête du piston comporte des fentes aptes à recevoir les ailettes de la tête de cylindre,
  • La pompe à gaz comporte un joint d'amortissement placé entre la tête de cylindre et la tête de piston,
  • Le joint d'amortissement est torique,
  • La pompe à gaz comporte un joint d'étanchéité torique entre un premier et un second flasque de la tête du piston,
  • La tête de piston comporte une vis d'assemblage traversant la tête de piston de part en part et se terminant dans un écrou d'assemblage, et
  • L'écrou comporte un ergot de blocage en rotation s'insérant dans un flasque de la tête de piston.
Advantageously, the gas pump of the invention may have one of the following characteristics:
  • The cylinder head has fins for deflecting the gas,
  • The piston head has slots adapted to receive the fins of the cylinder head,
  • The gas pump has a damping gasket placed between the cylinder head and the piston head,
  • The damping gasket is toric,
  • The gas pump has an O-ring seal between a first and a second flange of the piston head,
  • The piston head comprises an assembly screw passing through the piston head from one end to the other and ending in an assembly nut, and
  • The nut has a rotational locking lug inserted into a flange of the piston head.

Brève description des dessinsBrief description of the drawings

  • La figure 1, déjà décrite, représente un exemple de réplique d'arme classique.Figure 1, already described, shows an example of conventional weapon replica.
  • La figure 2, déjà décrite, représente un exemple de pompe à gaz classique.FIG. 2, already described, represents an example of a conventional gas pump.
  • La figure 3 représente une vue en coupe d'une pompe à gaz comprimé conforme à l'invention.Figure 3 shows a sectional view of a compressed gas pump according to the invention.
  • Les figures 4A et 4B représentent des vues en coupe, respectivement de face et de côté, de la tête de cylindre de la pompe à gaz de l'invention.Figures 4A and 4B show sectional views, respectively front and side, of the cylinder head of the gas pump of the invention.
  • Les figures 5A et 5B représentent des vues en coupe, respectivement, de côté et de face, de la tête de piston de la pompe à gaz de l'invention.Figs. 5A and 5B show cross-sectional views, respectively, of side and face, of the piston head of the gas pump of the invention.
  • La figure 6 représente schématiquement le flux tourbillonnaire centripète obtenu avec la pompe à gaz de l'invention.FIG. 6 schematically represents the centripetal swirling flow obtained with the gas pump of the invention.
Description détaillée de modes de réalisation de l'inventionDETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

Dans la pompe à air ou à gaz comprimé de l'invention, la tête de cylindre et la tête de piston ont des formes facilitant la poussée du gaz comprimé vers l'embout d'éjection. Dans la suite de cette description, on décrira une pompe à air comprimé, étant entendu que tout autre gaz utilisé habituellement dans les pompes des répliques d'armes peut aussi être utilisé dans la pompe de l'invention.In the air or compressed gas pump of the invention, the cylinder head and the piston head have shapes facilitating the thrust of the compressed gas towards the ejection nozzle. In the remainder of this description, a compressed air pump will be described, it being understood that any other gas usually used in the pumps of the replica weapons can also be used in the pump of the invention.

Sur la figure 3, on a représenté une vue de coté, en coupe, de la pompe à air comprimé de l'invention. Cette figure 3 montre un cylindre 7 formant un compartiment 72 de retenue d'air. Ce cylindre 7 est muni d'une tête de cylindre 71 au centre de laquelle un orifice 73 permet l'évacuation de l'air vers le canon de la réplique d'arme. Une extrémité d'un embout d'éjection 9, identique à celui de l'art antérieur, est logée à proximité de cet orifice central 73. Cette figure 3 montre également un piston 8 pouvant se mouvoir à l'intérieur du compartiment 72.In Figure 3, there is shown a side view, in section, of the compressed air pump of the invention. This FIG. 3 shows a cylinder 7 forming a compartment 72 for retaining air. This cylinder 7 is provided with a cylinder head 71 in the center of which an orifice 73 allows the evacuation of air to the barrel of the replica weapon. One end of an ejection tip 9, identical to that of the prior art, is housed near this central orifice 73. This FIG. 3 also shows a piston 8 able to move inside the compartment 72.

Dans l'invention, le piston 8 a une tête de piston 81 conique, c'est-à-dire qui a la forme d'un cône dont le sommet est aplati. La tête de cylindre 71 a une forme en entonnoir. En d'autres termes, la tête de cylindre forme un goulot conique dont le centre est l'orifice 73. La forme de la tête de piston 81 est adaptée pour s'emboîter dans la forme en entonnoir de la tête de cylindre 71.In the invention, the piston 8 has a conical piston head 81, that is to say which has the shape of a cone whose top is flattened. The cylinder head 71 has a funnel shape. In other words, the cylinder head forms a conical neck whose center is the orifice 73. The shape of the piston head 81 is adapted to fit into the funnel shape of the cylinder head 71.

La tête de cylindre 71 est fixe dans le cylindre 7. Elle comporte un orifice central 73. L'embout d'éjection 9, dans l'invention, comporte une première extrémité qui traverse l'orifice 73 pour déboucher dans le compartiment 72. Cette première extrémité est logée dans la tête de cylindre, à proximité dudit orifice 73. La seconde extrémité débouche dans le canon de la réplique d'arme. Dans un mode de réalisation de l'invention, l'embout 9 est inséré dans la tête de cylindre par surmoulage.The cylinder head 71 is fixed in the cylinder 7. It comprises a central orifice 73. The ejection nozzle 9, in the invention, has a first end which passes through the orifice 73 to open into the compartment 72. first end is housed in the cylinder head, near said orifice 73. The second end opens into the barrel of the replica weapon. In one embodiment of the invention, the nozzle 9 is inserted into the cylinder head by overmolding.

Comme dans l'art antérieur, l'embout d'éjection 9 est destiné à faire passer l'air comprimé depuis le compartiment 72 de compression d'air, jusqu'au canon dans lequel une bille en plastique est en attente d'expulsion. Dans le cas d'une réplique d'arme à armement manuel, le flux d'air comprimé assure l'expulsion de la bille.As in the prior art, the ejection nozzle 9 is intended to pass the compressed air from the air compression compartment 72 to the barrel in which a plastic ball is pending expulsion. In the case of a replica hand-held weapon, the flow of compressed air ensures the expulsion of the ball.

Dans le cas d'une réplique d'arme à chargement électrique, l'embout d'éjection est mobile, l'armement de la bille se faisant par un mouvement de cet embout animé par la fourchette d'entraînement. Ce déplacement est représenté sur la figure 3 par des flèches. Dans le cas d'un modèle électrique, le déplacement de l'embout d'éjection, appelé aussi embout de chargement, permet de pousser la bille dans le canon au moment du tir.In the case of a replica electrically charged weapon, the ejection tip is movable, the arming of the ball being done by a movement of this tip driven by the drive fork. This displacement is represented in FIG. 3 by arrows. In the case of an electric model, the displacement of the ejection tip, also called the loading tip, makes it possible to push the ball into the barrel at the time of firing.

La tête de cylindre 71 est rendue étanche à l'air, à l'intérieur du cylindre 7, au moyen d'un joint torique 74 placé dans un logement de la tête de cylindre.The cylinder head 71 is sealed to the air inside the cylinder 7 by means of an O-ring 74 placed in a housing of the cylinder head.

La tête de piston 81 comporte un premier flasque 89 et un second flasque 90. Le second flasque 90 a une forme conique. C'est ce flasque qui est en contact avec l'air comprimé. Le sommet aplati du cône du second flasque, situé en regard de l'orifice 73 de la tête de cylindre, permet de diriger au maximum l'air comprimé vers l'orifice central de la tête de cylindre. Le premier flasque 89 est situé à l'arrière du second flasque. Il sert d'interface entre la tête de piston 81 et les autres éléments du piston 8. En particulier, le premier flasque 89 est fixé sur la crémaillère 84 d'entraînement du piston. Une vis 85 traverse le second flasque 90 et le premier flasque 89. Cette vis 85 est vissée dans un écrou 86, contre lequel le ressort 11 est en appui. Cet écrou 86 comporte un ergot 83 de blocage en rotation qui vient s'insérer dans le premier flasque 89 du piston. Cet ergot de blocage 83 permet d'éviter toute rotation du piston 8 à l'intérieur du cylindre 7.The piston head 81 has a first flange 89 and a second flange 90. The second flange 90 has a conical shape. It is this flange which is in contact with the compressed air. The flattened top of the cone of the second flange, situated opposite the orifice 73 of the cylinder head, makes it possible to direct the compressed air as far as possible towards the central orifice of the cylinder head. The first flange 89 is located at the rear of the second flange. It serves as an interface between the piston head 81 and the other elements of the piston 8. In particular, the first flange 89 is fixed on the rack 84 for driving the piston. A screw 85 passes through the second flange 90 and the first flange 89. This screw 85 is screwed into a nut 86, against which the spring 11 is supported. This nut 86 has a rotational locking pin 83 which is inserted into the first flange 89 of the piston. This locking pin 83 makes it possible to avoid any rotation of the piston 8 inside the cylinder 7.

Un joint torique 88, placé entre le premier flasque 89 et le second flasque 90 du piston, assure l'étanchéité entre le piston et le cylindre. Ce joint torique 88 est placé dans un logement 91 réalisé dans le premier flasque 89, dont le volume est supérieur au diamètre du joint. Ainsi, lorsque la tête de piston s'approche de la tête de cylindre, un peu d'air comprimé du compartiment 72 passe dans le logement 91 du joint torique, par l'intermédiaire de trous de passage 92. Ceci a pour effet de plaquer le joint vers l'extérieur, c'est-à-dire contre le cylindre 7, ce qui assure l'étanchéité entre la tête du piston et le cylindre, évitant tout rejet d'air en arrière de la tête de piston.An O-ring 88, placed between the first flange 89 and the second flange 90 of the piston, seals between the piston and the cylinder. This O-ring 88 is placed in a housing 91 made in the first flange 89, whose volume is greater than the diameter of the seal. Thus, when the piston head approaches the cylinder head, a little compressed air from the compartment 72 passes into the housing 91 of the O-ring, via through holes 92. This has the effect of tackling the seal to the outside, that is to say against the cylinder 7, which ensures the seal between the piston head and the cylinder, avoiding any air rejection behind the piston head.

Selon l'invention, le système de pompe comporte également un amortisseur 87 situé entre la tête de piston 81 et la tête de cylindre 71. Cet amortisseur 87 peut être un joint torique. Il a pour rôle d'amortir le contact entre la tête de piston et la tête de cylindre, au moment où la tête de piston vient s'écraser contre la tête de cylindre. En effet, compte tenu de la forme de la tête de cylindre et de la tête de piston, l'air comprimé se dégage très rapidement dans l'embout d'éjection, ce qui fait que la vitesse du piston arrivant sur la tête de cylindre est relativement importante. Cet amortisseur, ou joint d'amortissement, 87 permet d'éviter un contact mécanique violent entre la tête de piston et la tête de cylindre, ce qui pourrait endommager l'une ou l'autre de têtes. Le joint d'amortissement 87 assure ainsi une distance minimale nécessaire entre la tête de cylindre et la tête de piston pour éviter un choc de la tête de piston sur la tête de cylindre.According to the invention, the pump system also comprises a damper 87 located between the piston head 81 and the cylinder head 71. This damper 87 may be an O-ring. Its role is to dampen the contact between the piston head and the cylinder head, at the moment when the piston head collapses against the cylinder head. Indeed, given the shape of the cylinder head and the piston head, the compressed air is released very quickly in the ejection nozzle, so that the speed of the piston arriving on the cylinder head is relatively important. This damper, or damping gasket, 87 makes it possible to avoid violent mechanical contact between the piston head and the cylinder head, which could damage one or other of the heads. The damping gasket 87 thus provides a minimum necessary distance between the cylinder head and the piston head to avoid a shock of the piston head on the cylinder head.

Ainsi, avec la pompe à air comprimé de l'invention, lorsqu'un utilisateur appuie sur la détente de la réplique d'arme, le piston et le ressort entraînent la tête de piston vers la tête de cylindre. L'air présent dans le compartiment de retenu d'air 72 est alors comprimé. Du fait de la forme des têtes de piston et de cylindre, le flux d'air comprimé est dirigé directement vers l'orifice 73 et donc vers l'embout d'éjection 9. Le flux d'air est ainsi concentré en une masse globale vers le centre de la tête de cylindre.Thus, with the compressed air pump of the invention, when a user presses the trigger of the weapon replica, the piston and the spring drive the piston head towards the cylinder head. The air in the air holding compartment 72 is then compressed. Due to the shape of the piston and cylinder heads, the flow of compressed air is directed directly to the orifice 73 and therefore to the ejection nozzle 9. The air flow is thus concentrated in a global mass towards the center of the cylinder head.

Cette pompe permet donc de diminuer considérablement la résistance rencontrée par l'air lorsqu'il s'échappe par l'embout d'éjection. Cette résistance est encore diminuée en utilisant des moyens destinés à faire tourbillonner le flux d'air vers l'embout d'éjection. Ces moyens consistent en des ailettes placées sur la surface de la tête de cylindre. La tête de piston comporte alors des fentes ou entailles destinés à recevoir ces ailettes, c'est-à-dire à s'emboîter autour des ailettes, lorsque la tête de piston est proche de la tête de cylindre.This pump therefore considerably reduces the resistance encountered by the air when it escapes through the ejection nozzle. This resistance is further reduced by using means for swirling the airflow to the ejection tip. These means consist of fins placed on the surface of the cylinder head. The piston head then has slots or notches for receiving these fins, that is to say to fit around the fins, when the piston head is close to the cylinder head.

Les figures 4A et 4B représentent des vues en coupe de la tête de cylindre de l'invention. Plus précisément, la figure 4B montre une vue en coupe de coté de la tête de cylindre. On voit, sur cette figure, l'embout d'éjection 9 qui se termine dans l'orifice central 73 de la tête de cylindre 71. Dans le mode de réalisation de la figure 4B, la tête de cylindre comporte des ailettes 75 destinées à faire tourbillonner le flux d'air vers l'orifice central et donc vers l'embout d'éjection. Cette figure montre également le joint torique 87, placé à l'avant de la tête de cylindre de façon à ce que la tête de piston et la tête de cylindre ne puissent entrer en contact direct l'une avec l'autre, lorsque la totalité de l'air comprimé a été évacué.Figures 4A and 4B show sectional views of the cylinder head of the invention. More specifically, Figure 4B shows a side sectional view of the cylinder head. This figure shows the ejection tip 9 which ends in the central orifice 73 of the cylinder head 71. In the embodiment of FIG. 4B, the cylinder head comprises fins 75 intended to swirl the airflow to the central hole and thus to the ejector tip. This figure also shows the O-ring 87, placed at the front of the cylinder head so that the piston head and the cylinder head can not come into direct contact with each other, when the whole compressed air was evacuated.

La figure 4A montre une vue en coupe de face de la tête de cylindre 71. On voit, sur cette figure, la tête de cylindre 71 sur laquelle sont fixées différentes ailettes 75. Dans le cas de la figure 4A, ces ailettes sont au nombre de six. Leur nombre, leur forme et leur emplacement sont choisis de façon à provoquer un tourbillon du flux d'air comprimé vers le centre de la tête de cylindre c'est-à-dire vers l'orifice 73. Ces ailettes peuvent être fixées sur la tête de cylindre par tous moyens de fixation connus. Elles peuvent aussi être moulées avec la tête de cylindre.FIG. 4A shows a front sectional view of the cylinder head 71. In this figure, we can see the cylinder head 71 on which are fixed different fins 75. In the case of FIG. 4A, these fins are in number six. Their number, their shape and their location are chosen so as to cause a vortex of the flow of compressed air towards the center of the cylinder head, that is to say towards the orifice 73. These fins can be fixed on the cylinder head by any known fastening means. They can also be molded with the cylinder head.

Sur la figure 5A, on a représenté une vue en coupe de côté de la tête de piston de l'invention. Cette vue montre l'extrémité de la tête de piston 81 avec son second flasque 90 en forme de cône aplati et son premier flasque 89, tous deux séparés par un joint d'étanchéité 88. Elle montre également la vis d'assemblage 85 qui traverse la tête de piston pour fixer les différents éléments du piston ensemble.In Figure 5A, there is shown a side sectional view of the piston head of the invention. This view shows the end of the piston head 81 with its second flattened cone flange 90 and its first flange 89, both separated by a seal 88. It also shows the assembly screw 85 which passes through the piston head to fix the various elements of the piston together.

La figure 5B montre une vue en coupe de face de la tête de piston 81. Cette figure 5B montre six fentes 93 destinées à recevoir les six ailettes de la tête de cylindre. Ces fentes 93 ont des dimensions et des formes adaptées pour s'emboîter autour des ailettes. Ces fentes sont réalisées dans le second flasque 90, par exemple lors du moulage dudit flasque.Figure 5B shows a front sectional view of the piston head 81. This Figure 5B shows six slots 93 for receiving the six fins of the cylinder head. These slots 93 have dimensions and adapted shapes to fit around the fins. These slots are made in the second flange 90, for example during the molding of said flange.

Cette figure 5B montre aussi six orifices 92 de passage d'air vers le joint d'étanchéité 88, un orifice 92 étant réalisé au fond de chaque fente 93. Il est à noter, toutefois, que le nombre et l'emplacement des orifices de passage d'air peut varier selon le type de joint utilisé et le modèle de la réplique d'arme.This FIG. 5B also shows six air passage orifices 92 towards the seal 88, an orifice 92 being made at the bottom of each slot 93. It should be noted, however, that the number and location of the orifices 93 Airflow may vary depending on the type of gasket used and the model of the weapon replica.

La figure 6 représente schématiquement le flux d'air obtenu à l'intérieur de la tête de cylindre. Ce flux d'air est schématisé par des flèches. Comme on le voit sur la figure 6, ce flux d'air comprimé est dirigé par les ailettes 75 vers le centre de la tête de cylindre 71, ce qui forme, au voisinage de l'orifice central 73, un tourbillon assurant une éjection plus rapide du flux d'air dans l'embout d'éjection. En effet, l'air comprimé entre les ailettes 75 voit sa vitesse augmenter et se met à tourner en convergeant vers le centre de la tête de cylindre, créant ainsi un tourbillon centripète s'engouffrant par l'embout d'éjection, ce qui accroît sensiblement la vitesse de l'air et donc l'énergie du flux destiné à propulser la bille se trouvant à l'entrée du canon.Figure 6 shows schematically the air flow obtained inside the cylinder head. This airflow is schematized by arrows. As can be seen in FIG. 6, this flow of compressed air is directed by the fins 75 towards the center of the cylinder head 71, which forms, in the vicinity of the central orifice 73, a vortex ensuring a greater ejection fast flow of air into the ejection tip. Indeed, the compressed air between the fins 75 increases in speed and begins to rotate converging towards the center of the cylinder head, thereby creating a centripetal vortex engulfing the ejection tip, which increases substantially the speed of the air and therefore the energy of the flow intended to propel the ball at the entrance of the barrel.

Claims (8)

  1. A gas pump for a replica ball slinging weapon comprising:
    - a cylinder (7) forming a gas retaining compartment (72) and fitted with a cylinder head (71) forming a lateral wall of the said retaining compartment, wherein the said cylinder head is provided with a central opening (73)
    - a gas discharge nozzle (9) having a first end opening into the retaining compartment (72) and a second end opening into a gun (1) of the replica weapon, and
    - a piston (8) fitted with a moving piston head (81) in the retaining compartment and capable of compressing the gas in the said compartment, wherein the piston head has a conical shape and the cylinder head has the shape of a funnel to complete the conical shape of the piston head,
    characterised in that the cylinder head is provided with means for swirling the flow of air to the discharge nozzle.
  2. The gas pump for a replica weapon according to Claim 1, characterised in that the means for swirling the air flow are blades (75).
  3. The gas pump for a replica weapon according to Claim 1 or 2, characterised in that the piston head is provided with slots (93) capable of receiving the blades of the cylinder head.
  4. The gas pump for a replica weapon according to any one of Claims 1 to 3, characterised in that it is provided with a damping joint (87) positioned between the cylinder head and the piston head.
  5. The gas pump for a replica weapon according to Claim 4, characterised in that the damping joint is toric in shape.
  6. The gas pump for a replica weapon according to any one of Claims 1 to 4, characterised in that it is provided with a toric sealing joint (88) between a first and a second cheek of the piston head.
  7. The gas pump for a replica weapon according to any one of Claims 1 to 6, characterised in that the piston head is fitted with an assembly screw (85) that crosses the piston head at various points and opens into an assembly nut (86).
  8. The gas pump for a replica weapon according to Claim 7, characterised in that the nut is fitted with a rotary locking lug (83) inserted in one of the cheeks of the piston head.
EP04300852A 2003-12-12 2004-12-07 Air pressuring pump for air gun Expired - Lifetime EP1541957B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0351032A FR2863698B1 (en) 2003-12-12 2003-12-12 COMPRESSED GAS PUMP FOR ARM REPLICA
FR0351032 2003-12-12

Publications (2)

Publication Number Publication Date
EP1541957A1 EP1541957A1 (en) 2005-06-15
EP1541957B1 true EP1541957B1 (en) 2006-08-09

Family

ID=34508778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04300852A Expired - Lifetime EP1541957B1 (en) 2003-12-12 2004-12-07 Air pressuring pump for air gun

Country Status (12)

Country Link
US (1) US7114493B2 (en)
EP (1) EP1541957B1 (en)
JP (1) JP4048198B2 (en)
KR (1) KR100646735B1 (en)
AT (1) ATE335979T1 (en)
DE (1) DE602004001840T2 (en)
DK (1) DK1541957T3 (en)
ES (1) ES2270319T3 (en)
FR (1) FR2863698B1 (en)
HK (1) HK1082539A1 (en)
PT (1) PT1541957E (en)
TW (1) TWI274842B (en)

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Publication number Priority date Publication date Assignee Title
US20060191523A1 (en) * 2004-12-07 2006-08-31 Paletz James S Apparatus for propelling projectiles
US7730881B1 (en) * 2005-02-07 2010-06-08 Impulse Solutions Llc Portable electric motor driven compressed air projectile launcher
WO2010147565A2 (en) * 2009-06-16 2010-12-23 Atak Silah Sanayi Ve Ticaret Limited Sirketti High-power pneumatic weapon system
US8931467B2 (en) * 2011-07-05 2015-01-13 Si Young Lee Magazine rifle
GB201223006D0 (en) * 2012-12-20 2013-01-30 Roots Noel L A spring powered gas operated weapon
US20150316345A1 (en) * 2013-09-07 2015-11-05 Gaither Tool Company, Inc. Quick-Release Valve Air Gun
CN104034206B (en) * 2014-06-03 2015-09-02 绍兴市岭峰气枪制造有限公司 A kind of air bottle type air pistol
EP3276295B1 (en) * 2015-03-24 2021-02-24 TOKYO MARUI Co., Ltd. Cut-off device of electric mechanism in imitation gun
JP6676618B2 (en) * 2015-03-24 2020-04-08 株式会社東京マルイ Multi-fire electric gun
US10350656B2 (en) 2016-11-11 2019-07-16 Milwaukee Electric Tool Corporation Drain clearing air gun
US10955215B2 (en) * 2019-08-22 2021-03-23 Tricord Solutions, Inc. Projectile launching apparatus
US11243045B2 (en) * 2020-06-05 2022-02-08 Tricord Solutions, Inc. Projectile launching apparatus
US12055363B2 (en) * 2022-02-09 2024-08-06 Tricord Solutions, Inc. Projectile launching apparatus

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US1299901A (en) * 1917-04-13 1919-04-08 Benjamin L Blair Air-gun.
CH312734A (en) * 1953-04-25 1956-02-29 Furter Albert Air rifle
DE1030735B (en) * 1956-07-10 1958-05-22 J G Anschuetz G M B H Air rifle
DE1107560B (en) * 1958-04-30 1961-05-25 J G Anschuetz G M B H Air rifle
SE377182B (en) * 1973-05-04 1975-06-23 Foerenade Fabriksverken
US5531210A (en) * 1994-11-16 1996-07-02 Hasbro, Inc. Toy gun

Also Published As

Publication number Publication date
KR20050058984A (en) 2005-06-17
JP2005172000A (en) 2005-06-30
DE602004001840T2 (en) 2007-03-08
FR2863698B1 (en) 2008-02-22
DE602004001840D1 (en) 2006-09-21
KR100646735B1 (en) 2006-11-23
TW200523520A (en) 2005-07-16
FR2863698A1 (en) 2005-06-17
US20050183709A1 (en) 2005-08-25
JP4048198B2 (en) 2008-02-13
PT1541957E (en) 2006-12-29
EP1541957A1 (en) 2005-06-15
ES2270319T3 (en) 2007-04-01
TWI274842B (en) 2007-03-01
ATE335979T1 (en) 2006-09-15
US7114493B2 (en) 2006-10-03
HK1082539A1 (en) 2006-06-09
DK1541957T3 (en) 2006-12-11

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