TECHNICAL FIELD OF THE INVENTION

The present invention relates to a pressure control structure that is developed to be used in semi-automatic firearms operating with gas pressure, that allows for using any type of live ammunition (small/magnum) easily by maintaining the stability of the gas pressure created as a result of firing the firearm and enables cocking the rifle mechanism, that protects the parts of the rifle as well as the assembly thereof and that provides the user a more comfortable firing experience.

PRIOR ART

Nowadays, many different ammunition types of various grammage and structure are utilized in semi-automatic firearms. Considering the operation principle of a firearm used in the state of the art, the ammunition is fed into the chamber and fired via the firearm muzzle, thereby creating a gas pressure upon the burning of the gunpowder contained therein. The gas generated therein allows for firing the bullet inside the ammunition through the barrel of the firearm. Meanwhile, some portion of the generated gas passes through the gas port created on the barrel and fills into the gas chamber, thereby pushing the gas piston. Thus, the mechanism of the firearm may be cocked once again. This cycle is repeated for every piece of ammunition that is going to be fired. When using a type of ammunition that is suitable for small firearms, a reduced amount of gas pressure is generated as the amount of the gunpowder contained within the ammunition is lower. Gas pressure reaching the gas piston should not be exposed to any leaks in order to ensure that the mechanism of the firearm may be cocked again properly. Therefore, the gap between the gas chamber and the gas piston is quite small. However, when a type of ammunition that is suitable for heavy arms (magnum) is desired to be used in firearms formed in such manner, the gas piston moves with breakneck speed as the amount of the gunpowder charge is much higher, thereby causing damage to the rifle mechanism as well as the assembly thereof. Using both small and heavy (magnum) arms ammunition in the same firearm poses serious problems. The firearm fails to offer the same efficiency in both cases.

Briefly, the amount of pressure generated as a result of firing ammunition types used nowadays varies based on the gunpowder amount contained by said ammunition types. Therefore, the pressure generated by ammunitions suitable for use in small arms and the pressure generated by heavy (magnum) arms ammunition is much different from one another. This particular difference causes various problems when ammunition types with different fillings are desired to be used in the same firearm. When using a type of ammunition that is suitable for small arms, the firearm cannot be cocked again after firing, and when using a type of ammunition that is suitable for heavy arms, the mechanism, as well as the assembly of the firearm, may sustain damage.

In the state of the art, various studies have been conducted in order to eliminate the existing drawbacks and to ensure that both types of ammunition may be used in the same firearm in a safe and problem-free manner.

In order to eliminate this drawback in the state of the art, at least two gas pistons are produced, and accordingly, it is enabled to use different types of ammunition with different fillings in the same firearm by means of changing the piston. In this application, however, additional costs incur as the user is required to purchase a second gas piston. Furthermore, the user is initially required to remove the installed gas piston on the firearm in order to replace and install the other respective gas piston when the weight of the ammunition changes during utilization. This causes difficulty of use for the user every time the user wishes to change the ammunition type. Moreover, losing the additional gas piston for different types of ammunition is also among the frequently encountered problems.

In the state of the art, different types of ammunition are tried to be used by producing a single-piston structure having different diameters on both sides. Just like in the previous application disclosed above, this application also requires removing and reinstalling the gas piston in order to change its direction as the weight of the ammunition changes.

Another application in the state of the art aims to discharge the ammunition by opening the gas port created on the barrel of the firearm, by means of turning a valve on and off. This particular application requires a wrench and an additional apparatus. In other words, an additional element is required to be able to adjust the gas pressure. Quite naturally, this brings additional costs for the user. Furthermore, since said valve is positioned on the barrel portion of the firearm, it disrupts the stance of the user, i.e. the line of firing position gets interrupted, thereby inducing difficulty of use. This is, of course, an undesired result for the user. Moreover, the system formed together with a valve, requires frequent maintenance. In case periodical maintenance gets disrupted or not performed regularly, the system may stop working properly and become dysfunctional .

In another application in the state of the art, systems with regulators are utilized for pressure control structuring in firearms. Although these systems which comprise regulators, provide a viable solution for small firearms, they cause major problems in heavier firearms utilizing magnum ammunition. However, adjusting the system with regulator falls behind the instant involving the re-cocking of the firearm under high pressure. Therefore, such systems are not recommended for being used with magnum ammunitions.

Consequently, it became necessary to perform R&D activities on the pressure control structure of firearms and carrying out manufacturing activities accordingly in order to eliminate the disadvantages in the state of the art as disclosed above and to provide a solution to the existing problems.

OBJECTS OF THE INVENTION

The present invention relates to a pressure control structure designed to eliminate all disadvantages and problems existing in the state of the art.

The object of the present invention is to ensure that all sorts of ammunitions with any type of filling may be fired by means of the inventive structure in the same safety characteristics without disassembling the firearm and without replacing or changing any component mounted on the rifle assembly. This is the most important characteristic of the present invention. The inventive structure allows for firing any type of ammunition, be it for small or heavier arms, in a safe and proper manner without making any changes on the firearm assembly.

Another object of the present invention is to ensure that any type of ammunition to be fired is moved to the firing position by intervening in the inventive pressure control structure even during firing without disrupting the line of firing position.

Yet another object of the present invention is to provide a pressure control structure that is both cost-efficient and timesaving for the user. Additionally, the fact that the inventive pressure control structure is easily accessible provides a further advantage.

Another object of the present invention is to provide a pressure control structure that utilizes a single-piston contrary to the applications known in the state of the art and that allows for adjusting the pressure of the gas reaching the piston during firing. The inventive structure ensures that the entire pressure of the gas generated when using a type of ammunition suitable for small arms reaches to the piston, and the excess gas pressure arising from using a type of ammunition suitable for heavier arms is discharged from the gas chamber in the firearm. Thus, the operation of the firearm is rendered more stable as the firearm is exposed to the same amount of gas pressure regardless of the ammunition type. Enough gas pressure is utilized when the firearm is operated with a type of ammunition that is suitable for heavy arms, and the excess amount of pressure is discharged, thereby preventing the firearm mechanism as well as the assembly thereof from sustaining damage.

Initially, a gas chamber is created in order to achieve the objects of the present invention. Said gas chamber is of a hollow cylindrical structure, wherein it comprises a piston seat, a bolt handle seat, and a gas discharge port (exhaust) positioned thereon. The bolt handle is another important component of the inventive pressure control structure. It is composed of the interconnection of the bolt handlebar and the ball setscrew.

DETAILED DESCRIPTION OF THE INVENTION

To be able to understand the novelties brought forth for the purpose of achieving the aforementioned objects, the inventive gas pressure control structure needs to be evaluated in consideration of the figures disclosed below, wherein;

FIGURE 1 illustrates the drawing in which the gas discharge port (exhaust) is shut by the bolt handle in the system installed to a firearm suitable for firing ammunition for small arms. FIGURE 2 illustrates the drawing in which the gas discharge port (exhaust) is open in the system installed to a firearm suitable for firing ammunition for heavy arms (magnum). FIGURE 3 illustrates the front perspective view of the gas chamber which is the first element of the inventive structure.

FIGURE 4 illustrates the rear perspective view of the gas chamber which is the first element of the inventive structure.

FIGURE 5 illustrates the sectional view of the gas chamber which is the first element of the inventive structure.

FIGURE 6 illustrates the assembled view of the bolt handle and the elements constituting it. FIGURE 7 illustrates the disassembled view of the bolt handle and the elements constituting it.

The components of the inventive pressure control system are enumerated with reference numerals in the annexed figures in order to ensure a better understanding of the inventive pressure control system, wherein;

1- Barrel

2- Gas Chamber

3- Gas Piston

4- Bolt Handle 5- Bolt Handlebar

6 Ball Setscrew

7- Bolt Handle Spring

8 Firearm Chassis

9- Bolt Handle Positioning Hole 10 Barrel Gas Port

11 Bolt Handle Seat

12 Gas Discharge Port

13 Gas Piston Seat

14 Gas Chamber Lug

15 Bolt Handlebar Positioning Hole

16 Ball Setscrew Hole

17 Bolt Handle Seat

Gas chamber (2) is formed as the first element of the inventive pressure control structure. The most important characteristic of the gas chamber (2) is that it comprises a gas discharge port

(12) thereon. Adjustment of the gas pressure inside the gas chamber (2) is performed opening and closing the gas discharge port (12). The position of the gas discharge port (12) on the gas chamber (2) is located on a surface to which the gas piston

(3) does not come into contact with. Said gas chamber (2) is of a cylindrical structure wherein it comprises a gas piston seat

(13) that allows for positioning the gas piston (3) therein. As it is illustrated in Figure 4, the gas chamber has a gas chamber lug (14) of rectangular shape located on the upper portion thereof. As illustrated in Figure 3, a hole is made in an end- to-end relation within the inner portion of the gas chamber lug

(14), and a bolt handle seat (11) is created therein to which the bolt handle (4) is connected. As illustrated in Figure 5, a gas discharge port (12) is created on the gas chamber lug (14) in a manner in which the bolt handle seat (11) is perpendicular to the lug and that it opens onto the gas piston seat (13).

Another important element of the inventive pressure control structure is the bolt handle (4). As illustrated in Figure 6, the bolt handle (4) is structured to have a stepped shaft shape, wherein an end thereof is fine, and the other end is thick. The thick end of the bolt handle comprises the bolt handlebar positioning hole (15) to which the bolt handlebar (5) is connected and a ball setscrew hole (16) to which the ball setscrew (6) is mounted.

The bolt handle spring (7) is inserted into the bolt handle seat (17) that is initially created on the firearm chassis (8) while the elements disassembled views of which are illustrated in Figure 7 are being installed. The thicker portion of the bolt handle (4) is aligned and pushed forward such that it engages the bolt handle seat (17) created on the firearm chassis (8). The bolt handlebar (5) is attached to the bolt handlebar positioning hole (15) on the bolt handle (4), to ensure that said bolt handle (4) is positioned such that it may freely move on the firearm chassis (8). A ball setscrew (6) attached to the bolt handle (4) is entrusted with preventing the bolt handlebar (5) from getting involuntarily removed from its respective place. The bolt handle spring (7) inserted into the bolt handle seat (17) absorbs the space of the bolt handle (4), thereby providing said bolt handle (4) better positioning. Said bolt handle (4) is positioned on the firearm chassis (8) such that the user may readily reach it. Thus, the user may intervene in the system without disrupting the line of firing position.

Thin end of the bolt handle (4) is positioned into the bolt handle seat (11) located on the gas chamber (2). Thus, the bolt handle (4) is positioned such that an end thereof operates inside the firearm chassis (8) and the other end operates within the gas chamber (2). Gas discharge port (12) is opened and closed by means of the movements of the bolt handle (4), thereby performing the operation of the system. When the bolt handle (4) is pushed in the direction of the barrel (1), the gas discharge port (12) moves into the closed position. The bolt handlebar (5) positioned on the bolt handle (4) is seated to the bolt handle positioning hole (9) that is closer to the barrel (1). Thus, the bolt handle (4) may be fixed in the position in which it closes the gas discharge port (12). As illustrated in Figure 1, the entire volume of gas coming from the barrel to the gas chamber (2) may reach the gas piston (3). Thus, the entire volume of gas generated returns to the firearm chassis (8) by passing through the barrel gas port (10), thereby assisting in re-cocking of the firearm. Thus, ammunition types suitable for small arms may be ejected from the system in a problem-free manner.

When the bolt handle (4) is pulled back, i.e. towards the firearm chassis (8), gas discharge port (12) opens. The bolt handlebar

(5) positioned on the bolt handle (4) is seated to a second bolt handle positioning hole (9) created at a rear end thereof. Thus, it ensures that the gas discharge port (12) stays in the open position. Thus, as illustrated in Figure 2, the firearm is switched to the position in which it is capable of firing the type of ammunition suitable for heavy arms (magnum). Some portion of the high-pressure gas arriving at the gas chamber (2) is discharged through the gas discharge port (12). The rest of the gas generated returns to the firearm chassis (8) by passing through the barrel gas port (10), thereby assisting in re-cocking of the firearm. Thus, the firearm is operated such that it utilizes ammunition type suitable for small arms, hence the mechanism, as well as the assembly of the firearm and the user, are prevented from sustaining any damage.