HK1199924B - Device for controlling the impulsive feeding of a pressurized fluid and an air weapon comprising such device - Google Patents

Description

Device for controlling the impulse force supply of a pressurized fluid and air weapon comprising such a device

Technical Field

The present invention relates generally to fluid handling systems, and in particular to fluid delivery control devices.

The invention also relates to an air weapon incorporating such a device.

Background

A variety of devices operating by means of a supply of compressed gas (for example air or carbon dioxide) are known, in which the gas must be supplied at a relatively high pressure into an expanded chamber and then expelled by an impact force to act on an actuator element or another operating member of the device.

Similar applications are known, for example, in impact-driven tools or in air-propelled weapons, or in "soft air-propelled (softair)" weapons.

In particular, air-propelled weapons have a controlled supply of compressed air tank for a chamber having a bullet therein to apply a high energy impact force to the chamber in order to eject the bullet.

Fluid delivery control devices are also known which control the instantaneous release of energy associated with the compressed working fluid in an actuating device.

However, the compressed gas supply systems of these devices have low efficiency and are not easily reloadable, especially when manually operated gas compression systems are used.

On the other hand, if the compressed gas is contained in a tank connected to the cartridge loading chamber, considerable fluid waste occurs with each shot.

US3102553 discloses a valve device for controlling the delivery of a pressurized fluid, comprising a hollow body having an inlet and an outlet for the pressurized fluid.

A movable valve element is housed within the hollow body and is used to selectively open and close the outlet to control fluid delivery and venting.

In particular, two separate variable volume chambers have been formed in the hollow body, which are supplied with respective pressurized fluids by separate supply circuits, so that opposite forces can be exerted on the valve element, which will close the outlet in equilibrium.

To break the force balance and allow the valve element to slide and open the outlet to allow gas to escape, additional pressure must be applied to one of the two sides of the valve element by supplying an additional volume of fluid through the third supply conduit.

This solution appears particularly complex and difficult to use in equipment such as tools and weapons, which must be guaranteed for practical use.

That is, control of the various fluid pressures requires connecting the various conduits to separate external fluid supply circuits.

Disclosure of Invention

The object of the present invention is to solve the above mentioned problems by providing a device for controlling the delivery of a pressurized fluid which is efficient and relatively cost-effective.

It is a particular object of the present invention to provide a device for the controlled delivery of a pressurized fluid which allows a substantially instantaneous release of the energy associated with the compressed fluid with a relatively short response time.

Another object of the present invention is to provide a device for the controlled delivery of a pressurized fluid which has a small number of components and which can be easily installed and secured in practice.

Another important object of the present invention is to provide a device for the controlled delivery of a pressurized fluid which allows its operation to be carried out using particularly simple control means.

These and other objects, as better described hereinafter, are achieved by a device for controlling the impulse force supply of a pressurized fluid as defined in claim 1.

According to this combination of technical features, the device will provide a rather short response time, which will make the device particularly suitable for applications in equipment requiring momentary excitation, such as air or gas-powered weapons.

In another aspect, the invention relates to an air weapon incorporating the device, as defined in claim 9.

Advantageous embodiments of the invention are set forth in the dependent claims.

Drawings

Further characteristics and advantages of the invention will become better apparent from a review of the following detailed description of several preferred, non-exclusive embodiments of the device of the invention and of a weapon incorporating it, described by way of non-limiting example with reference to the accompanying drawings, in which:

FIG. 1 is a perspective exploded cross-sectional view of the device of the present invention according to a first preferred embodiment;

FIG. 2 is a sequence of operation of the apparatus of FIG. 1 shown in a cut-away front perspective view;

FIG. 3 is a sequence of operation of the apparatus of the present invention with the configuration of the second preferred embodiment shown in a cut-away front view;

FIG. 4 is a schematic view of the apparatus of the present invention of a third preferred embodiment;

FIG. 5 is a schematic view, partly in section, of an air weapon incorporating a device according to the invention;

fig. 6 is an exploded cross-sectional view of a detail of the weapon in fig. 5.

Detailed Description

With reference to the above figures, a device for controlled delivery of a fluid is shown, generally designated by numeral 1, for installation in equipment (such as impact-driven tools, pneumatic actuators or soft air-driven weapons) in which an impact force must be applied to an operative component, such as a percussion hammer or one or more bullets.

The device 1 is designed to be mounted at an operating part of an apparatus and can be operated by means of different types of compressed fluids, in particular gases selected from the group comprising air and carbon dioxide.

The device 1 of the invention for the controlled delivery of a pressurized fluid comprises a substantially cylindrical hollow body 2 having an end wall 3, an end wall 4 and a longitudinal axis L.

The end walls 3, 4 comprise an inlet 5 and one or more outlets 6, respectively, for supplying pressurized fluid through a supply member (not shown) which may, for example, consist of a tank with a valve for selectively facilitating the inflow and/or outflow of fluid through the inlet 5.

The hollow body 2 houses internally a first variable-volume chamber 7, interposed between the inlet 5 and the inlet 6, for housing a first volume V₁Of the pressurized fluid of (1).

The hollow body 2 further comprises a closing member 9, the closing member 9 being slidably housed inside the hollow body and having an end portion 10 interacting with the end wall 4 of the hollow body 2, the end portion 10 being arranged downstream, according to the direction of fluid flow, for selectively closing the outlet 6.

The closing member 9 also has associated therewith a guide member 8, which guide member 8 serves to slidably guide the closing member 9 within the hollow body 2 between a first closed end position of the outlet 6 and a second open end position of the outlet 6.

Advantageously, the sliding movement of the closing part 9 between the two end positions is facilitated by an operating member 11, the operating member 11 being at least partially housed inside the hollow body 2.

According to the invention, the closing member 9 and the guide member 8 are coupled together so as to slide with respect to each other. Furthermore, the closing member 9 is internally hollow to enclose or define the first variable-volume chamber 7, and the guide member 8 has internally a passage 14 for allowing fluid communication between the inlet 5 and the first chamber 7.

Thus, the control of the fluid flow introduced and/or discharged through the inlet 5 will allow the volume V of pressurized fluid in the first chamber 7 to be controlled and a momentary pressurized fluid flow to be generated at the outlet 6, solely by using fluid from the inlet 5.

In a first preferred configuration, as shown in fig. 1, inside the hollow body 2, at the upstream end wall 3, there is a second variable-volume wall 12, which second variable-volume wall 12 is arranged upstream of the first chamber 7, between the inlet 5 and a passage 14 in the guide member 8.

The second chamber 12 is in constant fluid communication with both the fluid inlet 5 and the first variable-volume chamber 7 (through a passage 14 in the guide member 8).

The guide member 8 is therefore interposed between the first and second chambers 7, 12 and has a substantially cylindrical shape, preferably coaxial with the hollow body 2, the end faces 13', 13 ″ housed respectively in the first and second chambers 7, 12.

Advantageously, the guide member 8 may be slidably fitted into the hollow body 2 to respond to the opposing force F₁、F₂Is axially slid by the opposing force F₁、F₂By means of the pressurized fluid in both the separate chambers 7, 12, on the end faces 13', 13 ".

Thus, the guide member 8 may interact with the closure member 9 to facilitate axial sliding of the closure member 9 from the first closed end position to the second open end position, thereby resulting in a volume V₁Is momentarily discharged from the first chamber 7 to provide the impact force required for exciting the operative components of the apparatus associated with the device 1.

The fluid communication between the first chamber 7 and the second chamber 12 allows to control the pressure P in the second chamber 12₂To control the pressure P in the first chamber 7₁。

The device 1 may comprise a cylindrical part 15, the cylindrical part 15 being designed to be introduced into the hollow body 2 and having a first front surface 16 at the inlet 5 for defining the end wall 3 of the hollow body 2. For example, the cylindrical member 15 may be externally threaded, which allows it to be fastened to a mating internally threaded portion of the hollow body 2.

Furthermore, the cylindrical part 15 comprises a second front surface 17 for defining an upstream second chamber 12, said second chamber 12 being defined downstream of the end face 13 ″ of the guide part 8.

In particular, the second chamber 12 can be housed inside the cylindrical member 15, and advantageously the substantially cylindrical guide member 8 has a first end portion 21 comprising a first end face 13' sliding in the first chamber 7, and a second end portion 18 having an end face 13 ″ slidably introduced in the second chamber 12.

Advantageously, a substantially longitudinal discharge channel 19 can be formed in the cylindrical member 15 to allow the escape of air during the backward movement of the guide member 8, as will be better described below.

The first end portion 21 of the guide member 8 may be operatively coupled to the closure member 9 to facilitate axial sliding of the closure member 9 following sliding movement of the guide member 8 by mutually opposing forces F₁、F₂Resulting from a predetermined difference therebetween.

The maximum value of the volumes V1, V2 of the two chambers 7, 12 when the closing member 9 is in the closed position can be chosen to create a balance between oppositely directed forces exerted on the guide member 8 and the closing member 9.

Obviously, force F₁、F₂Is also based on the volume V₁And volume V₂The affected segment. For example, as shown in FIG. 2, the second volume V₂Will act on the entire second end face 13 "of the guide member 8, whereas the first volume V₁Will act on the first end face 13' of the guide member 8 and a part of the closing member 9.

By suitably varying the size of these sections, the oppositely directed forces generated by the longitudinally opposed portions of the guide member 8 can be varied and the time at which fluid is momentarily discharged through the outlet 6 can be set.

By way of example and without limiting the invention, the first chamber 7 has a section S₁And volume V₁Smaller than the cross-section S of the second chamber 12₂And volume V₂。

Moreover, as better described hereinafter, defined by the volume V₁And volume V of₂Two forces F generated by the pressurized fluid of₁、F₂Or may have a different modulus, F₂<F₁In this case, the operating member 11 may be configured to follow the force F₂The same direction exerts an additional force on the closing member 9 which is used to achieve passage from the open position to the closed position after the compressed fluid has been discharged.

Advantageously, the guide member 8 is axially movable between a first end position, in which the second chamber 12 has a maximum volume V, and a second end position₂And the closing member 9 closes the outlet 6, in which second end position the second chamber 12 has a minimum volume V₂(and possibly even a volume of substantially zero) and the closing member 9 opens the outlet 6.

In particular, the guide element 8 can move along a first predetermined stroke between a first end position and a second end position for axially sliding the closing member 9 along the same stroke.

Actuating the supply member valve (not shown) to discharge fluid in the second chamber 12 through the inlet 5 will allow the guide member 8 to act at the pressure P acting in the first chamber 7₁From a first end position to a second end position.

This is because of the reduced pressure P of the fluid in the second chamber 12₂Will result in a force F acting on the second end face 13 "of the guide member 8₂Is reduced.

In operation, as schematically shown in fig. 2, actuating the valve to communicate fluid through the inlet 5 allows the guide member 8 to be displaced from the second end position to the first end position.

This is because the increased fluid pressure P2 in the second chamber 12 will result from the second volume V₂The force F generated and acting on the second end face 13 ″₂And is increased.

In contrast, the discharge of the compressed fluid from the second chamber 12 (for example through the same inlet 5 or through the discharge hole 19) will be at the first volume V on the first face 13' of the guide member 8₁Force F generated by the fluid₁And from the second volume V₂The force F generated and acting on the second end face 13 ″₂Creating an imbalance therebetween.

When the difference exceeds a predetermined value, the guide member 8 will slide axially to the second end position, whereby the guide member 8 moves with the closing member 9 from the first closed position to the second open position.

As the closure member 9 slides, its end portion 10 will move away from the downstream end wall 4 of the hollow body 2, while allowing the outlet 6 to be at least partially opened.

Advantageously, the closing member 9 may be configured to slide axially with respect to the guide member 8 along a second predetermined maximum stroke.

In particular, the fluid outflow outlet 6 facilitates the axial displacement of the closing member 9 with respect to the guiding member 8, so that the volume of the first chamber 7 changes instantaneously.

Furthermore, as the fluid flows through the outlet 6, the fluid may have a volume equal to the first volume V₁The force F generated₁Additional force F in the same direction₃Is applied to the end portion 10 of the closure member 9.

This additional force F3 will further facilitate the axial sliding movement of the closing member 9 on the guide member 8, thereby arranging the end portion 10 of the closing member 9 at a predetermined distance away from the downstream end 4 of the hollow body 2.

Advantageously, the operating member 11 may comprise a spring acting on the closing member 9 and serving to apply a further force F₄An elastic member 23 applied to the closure member 9 so that the closure member 9 automatically springs back to the closed position of the outlet 6 once the compressed fluid is discharged from the first chamber 7, wherein said force F₄In response to the force F exerted by the fluid in the second chamber 12₂In the same direction.

For example, the elastic member 23 may be a helical spring or the like, the elastic member 23 being coaxial with the guide member 8 and disposed outside the guide member 8, in particular between the cylindrical member 15 and the closing member 9.

The spring constant of the spring 23 can be chosen on the basis of the fact that the auxiliary closing member 9 springs back from a position at the maximum distance from the downstream end 4 of the hollow body 2 to a position closing the outlet 6 within a predetermined time, which should be short enough to allow the device 1 to close quickly once the fluid contained in the first chamber is completely discharged.

Advantageously, the channel 14 in the guide member 8 may be small enough to allow a controlled leakage of fluid from the second chamber 12 to the first chamber 7.

In particular, the passage 14 may be substantially capillary sized to allow a controlled flow of compressed fluid from the second chamber 12 to the first chamber 7 during a time longer than the time required for the spring 23 to move the closing member 9 back to the closed position.

This will prevent fluid from entering the first chamber 7 when the first chamber 7 is in fluid communication with the outside through the outlet 6 or it will allow only a very small amount of fluid to enter the first chamber 7.

With this particular arrangement, the device 1 of the present invention will significantly reduce the waste of compressed fluid typically occurring during the refilling of prior art devices.

In the configuration of fig. 1 and 2, a substantially central rod 22 is also provided, which rod 22 extends substantially along the entire longitudinal length of the hollow body 2, in a state in which the opposite longitudinal ends 22', 22 "are stably fixed inside the hollow body 2.

For example, the opposite longitudinal ends 22', 22 "may be externally threaded so as to be screwed with the co-operating threaded portions of the cylindrical member 15 and of the hollow body 2, respectively.

The central rod 22 has a substantially longitudinal cylindrical shape and has dimensions extending through the first and second chambers 7, 12, and has an intermediate section 24 which fits with a slight clearance in a longitudinal passage 25 of the guide member 8 to define, together with the longitudinal passage 25, the leakage passage 14.

The rod 22 will thus in turn act as a sliding guide for the guide member 8 and ensure a sufficient mechanical length of the hollow body 2.

In the configuration as schematically shown in fig. 3, the leakage channel 14 may alternatively consist of a longitudinal central through channel extending through the entire guide member 8.

In both configurations, the closure member 9 has a substantially tubular shape, while a substantially cylindrical longitudinal peripheral wall 26 slides fluid-tightly inside the hollow body 2.

The longitudinal peripheral wall 26 may enclose the first chamber 7 and may be closed upstream by a first substantially transverse wall 28 having a longitudinal hole 29 for allowing coupling with the guide member 8, and downstream by a second substantially transverse wall 31 having a central opening 35 for allowing fluid communication with the outlet 6.

Advantageously, the guide member 8 comprises a driving ring 32 integral with the first end 22' and intended to engage the first substantially transverse wall 28 of the closure member 9, so as to drive the closure member 9 axially from the first end position to the second end position.

For example, the drive ring 32 may be a Seeger interlocking ring, an elastic ring, a pair of crescent rings, or the like.

Furthermore, the presence of the drive ring 32 prevents the first end portion 21 of the guide member 8 from sliding out of the hole 29 formed in the closure member 9, and the drive ring 32 allows the first face 13' of the guide member 8 to be constantly retained within the first cavity 7.

The lever 22 may have an abutment surface 27 for the guide member 8 in order to arrange the guide member 8 in the first end position.

The guide member 8 may have a cavity 30 with a substantially transverse wall 33, the transverse wall 33 being longitudinally offset from the first end face 13' for interacting with the abutment surface 27 of the rod 22.

Advantageously, the downstream end wall 4 of the hollow body 2 faces the second substantially transverse wall 31 of the closing member 9 and has a plurality of substantially axial outlets 6 for fluid communication with the central opening 35.

In particular, if the device 1 is designed for use in an air-propelled weapon, the outlets 6 may be arranged circumferentially in equally angularly spaced relationship to allow the discharged fluid to flow out of the hollow body 2 in a substantially axial outflow direction.

In another embodiment of the device, as schematically shown in fig. 4, the operating member 11 may comprise a mechanical actuator 36 or an electromechanical actuator 36 in order to facilitate the sliding movement of the closing member 9 from the first end position to the second end position.

Here, the guide member 8 may be fixedly accommodated within the hollow body 2 and abut against the end wall 3 of the hollow body 2, so that the second chamber 12 is not provided.

The actuator 36 may be of the manually operated type, said actuator 36 having a pin 37, said pin 37 being integral with the closing member 9 and sliding in a slot 38 formed in the side wall of the hollow body 2.

Thus, once the first chamber 7 has been loaded in the usual manner, the pin 37 can be operated to exert on the closing member 9 the force required to overcome the force of the spring 23, thereby causing the closing member 9 to slide and open the outlet 6 to expel the compressed fluid.

After discharge of the fluid, the inflow through the leakage channel 14 will again load the first chamber 7 and the spring 23 will move the closing member 9 back to the first closed end position.

Alternatives to manual actuators may be automatic actuators, or actuators controlled by small electromechanical motors or magnetic systems, without specific limitations.

In another aspect, the present invention provides an air-propelled weapon 42, as schematically shown in fig. 5, the air-propelled weapon 42 comprising a barrel 43 for guiding and propelling one or more cartridges B, a member 44 for loading the cartridges B into a loading portion 45 of the barrel 43, a member 46 for controlled supply of compressed fluid to the barrel 43 for propelling the cartridges B, and a trigger member 47 for controlling discharge of fluid to the cartridges B.

According to a characteristic feature of the weapon 42, the supply member 46 comprises a device 1 for controlling the delivery of pressurized fluid as described above, the device 1 being interposed between the trigger member 47 and the loading portion 45 of the cartridge 43.

Although a gun weapon 42 is schematically shown in fig. 5, such a weapon may be any soft air-propelled weapon having a barrel or propulsion tube 43 for containing one or more cartridges for a pistol, gun, mortar or the like.

In particular, the propulsion bobbin 43 may have a first housing for a compressed gas tank, and a second housing adjacent to the first housing, wherein the device 1 is arranged for allowing fluid communication between the outlet 6 and a bullet loading area for loading bullets into the propulsion bobbin 43, and the device 1 is arranged for using the impact flow from the outlet 6 for transferring the energy required for propulsion to the bullet B.

The trigger member 47 may comprise one or more user operable levers to manually facilitate the delivery of air into the inlet 5 of the device 1 and to allow air to load the first chamber 7 and subsequently the second chamber 12, as described above.

A particularly important advantage of the invention is that, irrespective of the presence of the device 1 of the invention, the loading member 44 can comprise new means 48 for loading bullets arranged in the loading section 45.

In particular, as shown more clearly in fig. 6, the loading device 48 will comprise a substantially cylindrical portion, known as a cylinder 49, which is rotatably housed in the thrust cylinder 43 and is coaxial with the thrust cylinder 43.

The cylinder 49 has one or more longitudinal channels 50, each for containing a longitudinal row of substantially spherical bullets B. Each channel 50 may be suitably aligned with a respective outlet 6 of the hollow body 2 to receive the discharged fluid.

If the control device 1 is not provided, the channel 50 will be in fluid communication with a known fluid transfer conduit, as suitably provided.

In any case, this would provide the undoubted advantage of arranging a plurality of bullets B simultaneously in the loading portion 45 of the barrel 43 in order to propel a plurality of bullets simultaneously, unlike prior art weapons which provide for the propulsion of one bullet at a time.

Advantageously, the channels 50 do not extend all along the angular section of the cylinder 49 (but through a smaller angle) to prevent leakage of unused compressed fluid, since there may be no rows of cartridges B in the loading zone.

A guide cylinder 51 is provided downstream of the cylinder 49, the guide cylinder 51 having an arcuate guide duct 52 for guiding the cartridges B along a predetermined path to move each row of cartridges from a position substantially perpendicular or transverse to the bobbin 43 to a position substantially horizontal or parallel to the longitudinal direction of the bobbin 43.

The guide cylinder 52 also has a plurality of first longitudinal channels 53, the plurality of first longitudinal channels 53 being intended to be aligned with the seating channels 50 of the bullet B to define an extension and to allow the expelled fluid to have a substantially axial direction for the majority of the length of the barrel 43, while preventing transverse energy dispersion.

To this end, a further cylindrical body 54 may be provided, which cylindrical body 54 may be arranged downstream of the guide cylinder 51 and has a second channel 55, the second channel 55 being longitudinally aligned with the first channel 53, so as to further increase the stroke of the bullet B, and the fluid still having a substantially axial direction of delivery.

In addition to being fixed to the control device 1 of the invention, the loading device 48 is also fixed by a bell-shaped body 56, the bell-shaped body 56 fitting into a central seat 57 of the cylindrical body 54 and allowing the assembly of the entire loading device by using a through pin 58.

The above disclosure clearly shows that the invention achieves the intended objects and particularly meets the requirement of providing a device for controlling the pressure of a fluid which guarantees a high efficiency and greatly reduces the waste of fluid.

The device and weapon of the invention are susceptible of numerous changes and variants, within the inventive concept disclosed in the appended claims. All the details of the invention may be substituted by other technically equivalent parts, and the materials may vary depending on different needs, without departure from the scope of the invention.

Although the device and weapon have been described with particular reference to the accompanying drawings, the numerals referred to in the disclosure and claims are only used for the sake of a better intelligibility of the invention and shall not be intended to limit the claimed scope in any manner.

Claims (9)

1. A device (1) for controlling the impact feed of a fluid, the device comprising:

-a substantially cylindrical hollow body (2) having a longitudinal axis (L) and opposite closed end walls (3, 4) respectively having at least one inlet (5) and at least one outlet (6) for a pressurized fluid, wherein the hollow body (2) has internally:

a first chamber (7) of variable volume interposed between the inlet (5) and the outlet (6) so as to contain a first volume (V)₁) The pressurized fluid of (a);

a closing member (9) interacting with the downstream end wall (4) of the hollow body (2) so as to selectively close the outlet (6);

-a guide member (8) associated with said closing member (9) to guide the closing member (9) between a first end closed position of said outlet (6) and a second end open position of said outlet (6);

an operating member (11) for engaging the closing part (9) so as to facilitate the sliding of the closing part (9) into the hollow body (2) between the first end closed position and the second end open position;

wherein the closing member (9) and the guiding member (8) are reciprocally movable, the closing member (9) being internally hollow to enclose the first cavity (7), and the guiding member (8) having a channel (14) for fluid communication of the inlet (5) with the first cavity (7);

characterized in that said operating member (11) comprises a second chamber (12) provided with said inlet (5) and having a variable volume, said second chamber being intended to contain a second volume (V)₂) Of (D) a pressurized fluid (P)₂) Said second chamber (12) being arranged upstream of said first chamber (7) and being in fluid communication with said first chamber (7) through said passage (14) so as to control the pressure (P) in said first chamber (7)₁)。

2. Device according to claim 1, characterized in that said guide member (8) is substantially cylindrical, having end faces (13 ', 13 ") housed respectively inside said first chamber (7) and inside said second chamber (12), to slide into said hollow body (2) in response to the difference between oppositely directed forces (F1, F2) generated by the pressurized fluid on said end faces (13', 13"), and to promote the axial sliding of said closure member (9) and the instantaneous discharge of said first chamber (7).

3. Device according to claim 1 or 2, characterized in that the guide member (8)Is axially movable between a first end closed position, in which the second chamber (12) has a maximum volume (V)₂) And the closure member (9) closes the outlet (6), in which second end-open position the second chamber (12) has a minimum volume (V)₂) And the closing member (9) opens the outlet (6).

4. Device according to claim 1 or 2, characterized in that said closing member (9) is substantially tubular, having a substantially longitudinal peripheral wall (26) sealingly slidable in said hollow body (2) and enclosing said first chamber (7), said peripheral wall (26) being closed at one end by a first substantially transverse wall (28) having a longitudinal hole (29) for coupling with said guide member (8), and at the other end by a second substantially transverse wall (31) facing said downstream end wall (4) of said hollow body (2), said second substantially transverse wall (31) having a central opening (35) for fluid communication of said first chamber (7) with said at least one outlet (6).

5. Device according to claim 4, characterized in that the guide member (8) has, at an upstream end (18), a drive ring (32) for engaging the first substantially transverse wall (28) of the closure member (9) so as to drive it axially from the first end closed position to the second end open position.

6. The device according to claim 1 or 2, characterized in that said guide means (8) comprise a central rod (22) having opposite ends (22', 22 ") fixed to said hollow body (2) and having a middle section (24) inserted with minimum play in a longitudinal channel (25) of said guide means (8), so as to define therein a channel (14) with a sufficiently small transverse section to allow a controlled flow of fluid from said second chamber (12) to said first chamber (7).

7. Device according to claim 1 or 2, characterized in that said operating member (11) comprises a lever acting on said closing member (9) and intended to exert a further force (F) on the closing member (9)₄) To facilitate axial sliding of the closure member (9) from an open position of the outlet (6) to a closed position of the outlet, wherein the further force (F)₄) And a second volume (V) entering said second chamber (12)₂) Fluid (F) force (F)₂) In the same direction.

8. Device according to claim 1, characterized in that said operating member (11) comprises a mechanical or electromechanical actuator (36) associated with said closing member (9) for facilitating the axial sliding thereof from said first end closed position to said second end open position.

9. A gas-actuated weapon, the gas-actuated weapon comprising:

a bobbin (43) for guiding and throwing at least one bullet (B);

-a loading member (44) for loading at least one bullet (B) into a loading portion (45) of the bobbin (43);

a controlled feeding member (46) for the controlled feeding of a pressurized fluid into the bobbin (43);

a trigger member (47) for controlling the discharge of compressed fluid to the cartridge (B) for firing the cartridge;

characterized in that said controlled supply member (46) comprises a device (1) according to any one of the preceding claims for the controlled supply of a pressurized fluid, interposed between said trigger member (47) and said loading portion (45) of said cartridge (43).