RU228419U1 - PNEUMATIC SHOOTING DEVICE - Google Patents

Abstract

The utility model relates to pneumatic weapons. It is a pneumatic single-shot shooting device, similar in appearance to a pen or marker. The use of a petal valve made it possible to significantly speed up the charging of the receiver of the device with gas, which, together with the use of a light piston, which acts as a quickly opening release valve, and the placement of the barrel inside the receiver, made it possible to create a compact and relatively powerful pneumatic shooting device. This device can be used, for example, for self-defense, in explosive premises where the use of firearms is prohibited, or for recreational shooting. 5 s.p. f-ly, 4 ill.

Description

The utility model relates to pneumatic weapons.

The known pneumatic shooting pens from the existing level of technology are the Dart-Pen (created for the Special Operations Executive (SOE), Great Britain) (magazine "Pneumatic Weapons in Russia" Historical Series 3/2003.) and the Air-Pen (created for the Office of Strategic Services (OSS)), developed during the Second World War. (The similarity with my device is that the force of compressed gas (air) is used to produce a shot.) These shooting devices, designed for throwing a dart-like projectile, had a spring-piston pneumatics scheme, in which the projectile is thrown due to the energy of air during its dynamic compression by a piston with a spring. One of the main disadvantages of this technical solution is that the spring-piston part occupied a significant part of the body, so the barrel had to be made short, to comply with the dimensions, as a result of which the speed and stability of the projectile were not very high. Also, the spring-piston arrangement itself has a low efficiency, since the relatively low spring stiffness and small size of the compression chamber do not allow the necessary energy to be transferred to the projectile.

The closest technical solution chosen as a prototype is the “Pneumatic firing device” [patent for utility model RU 160918 U1, published 2016.04.10 IPC F41B 11/00 (2013.01)].

The technical solution provides a pneumatic single-shot shooting device similar in appearance to a pen or marker, using a light piston that acts as a quickly opening release valve, and the placement of the barrel inside the receiver made it possible to make this device compact.

The main elements of the device are the barrel fixed inside the receiver, the valve for filling the receiver, the trigger mechanism, and the piston with a seal that acts as an exhaust valve. The piston is made in the form of a glass and is made of fluoroplastic, which reduces the friction coefficient of the piston on the walls of the receiver, and also consumes less compressed gas energy to move the piston.

The receiver is filled with gas by connecting the charging nipple to the charging valve, the gas enters the small chamber and presses on the piston, which in turn locks the barrel of the device in the firing position. Due to the resulting pressure difference between the small chamber and the large chamber of the receiver, the gas fills the large chamber through a small gap between the receiver and the locking fluoroplastic piston. Charging is considered complete when the pressure in the small and large chambers equalizes and becomes equal to the pressure of the gas entering the device. After which the launching component is loaded and the trigger mechanism is installed.

The disadvantage of the known technical solution is the low speed of gas loading of the said device, which occurs due to the small gap between the fluoroplastic piston and the walls of the receiver. Increasing the gap between the piston and the receiver can increase the speed of gas loading of the main receiver, but this negatively affects the behavior of the piston at the moment of firing, due to the fact that less pressure is created on the piston and it opens more slowly, due to which the speed of gas flow into the barrel and the effectiveness of the shot decreases, and the likelihood of technical problems associated with piston skew during the loading process or during the shot increases.

The following set of prototype features coincide with the essential features of the utility model: a barrel fixed inside the receiver, a valve for filling the receiver, a trigger mechanism, a piston in the form of a glass, which acts as an exhaust valve.

The utility model is aimed at improving the operational characteristics by increasing the loading speed of a pen-like portable pneumatic shooting device.

This objective is achieved due to the fact that the pneumatic firing device contains a receiver filled with gas, a barrel installed inside the receiver, into which the projectile is loaded from the muzzle, a light freely moving cup-shaped piston with holes for accelerating the loading of the receiver with gas and a petal check valve combined with a seal, located inside the receiver and completely blocking the cross-section of the barrel, a valve that is used both for loading the receiver with gas, due to the possibility of attaching a loading nipple to it, and for firing a shot, as well as a trigger mechanism block, which is attached to the receiver on a thread and consists of a lever and a pushing rod, is separated during loading and acts on the valve rod to fire a shot.

An additional feature is that the projectile being thrown is either a bullet or a dart.

An additional feature is that compressed air, carbon dioxide, nitrogen or airgun mixtures based on methane and propane can be used for charging.

An additional feature is that the piston is made of fluoroplastic.

An additional feature is that the barrel can be smooth or rifled.

An additional feature is that the petal valve combined with the seal can be made of rubber or silicone.

Brief description of the drawings

Fig. 1 - is a sectional view of a pneumatic firing device with its elements indicated (the device is disassembled).

Fig. 2 - is a sectional view of the pneumatic firing device in assembled form (all elements are in a static state).

Fig. 3 - is a section of the pneumatic firing device before firing.

Fig. 4 - is a section of the pneumatic firing device at the moment of firing.

The pneumatic firing device (Fig. 1) consists of a metal housing/reservoir (1), in which the barrel (2) is centrally fixed and a threaded tube (12) (into which element 5 is screwed, which is a type of Schrader valve), which connects the housing and the trigger mechanism (9).

The trigger mechanism is a clip/lever (7) (fixed to the axis and spring-loaded by element 8), a rod (11) and a rod spring (10). A channel (6) is also drilled for gas drainage.

One of the main elements is a piston with holes (4) with a petal check valve (3) fixed in it, combined with a barrel seal, allowing the receiver to be filled with gas faster. Elements 13 and 15 indicate chambers containing air, 14 - the projectile being thrown.

The piston (4) is made in the form of a glass and is made of fluoroplastic, which allows to reduce the weight and eliminate the piston skewing inside the receiver. Also, due to the low coefficient of friction between the metal and fluoroplastic, the minimum friction force of the glass-shaped piston on the receiver is achieved, which allows to spend less energy of compressed gas on piston movements and makes it possible to quickly open the gas passage from the receiver to the barrel during a shot.

The thrown elements can be steel balls or lead bullets, as well as darts or arrows.

The barrel can be either smooth, for throwing steel balls or dart-like elements, or rifled, for throwing lead bullets.

Also, in one of the embodiments of this device, it may additionally have knurling on the body for better holding in the hand, as well as notches on the body that serve as sighting devices (not shown in the graphic materials).

The device works as follows:

The trigger mechanism is separated from the reservoir. A charging nipple from a pump, compressor or gas cylinder is screwed onto tube 12 and gas under pressure is pumped into reservoir 1 through valve 5. The gas enters the small chamber and presses on the piston, which in turn locks the barrel of the device in the firing position. Due to the resulting pressure difference between the small chamber 13 and the large chamber 15 of the receiver, the petal valve located on the piston opens, and the gas quickly fills chamber 15. Upon completion of charging, the pressure in chambers 13 and 15 is equalized and the petal valve closes. The gas that fills the reservoir presses on piston 4, pressing it with seal 3 to barrel 2 (the pressure in 13 and 15 is the same). After that, instead of the loading nipple, the trigger mechanism 9 is screwed onto the tube 12. The projectile 14 is loaded into the barrel 2 from the muzzle.

Next, you need to fire a shot, after which the loading process is repeated.

The safety of the loaded weapon is ensured by the fact that the spring 8 presses the clip 7, preventing accidental pressure on the rod. The spring 10 of the rod 11 does not allow it to move freely in the channel and interact with the valve rod in the normal state. The gas presses on the piston with great force, preventing it from opening, and since the piston is made of a light material, even if the device falls, the piston will not have the energy necessary to overcome the pressure.

Methods for the most convenient shot:

1. The device is held in the hand and pressed to the palm with several fingers. The clip is cocked to position "a" in Fig. 3 with the thumb or index finger, and then pressed to position "b" in Fig. 4. A shot is fired. Allows shooting with one hand when a quick hit to a target at short distances is necessary.

2. The device rests with a notch in the palm of the hand in the area of the thumb. It is held by the thumb, middle and index fingers of the other hand (the device is placed on the middle finger and grasped from both sides by the thumb and index). The index or middle finger of the hand on which the device rests is used to cock the clip to the "a" position (Fig. 3), aim and press the clip to the "b" position (Fig. 4). A shot is fired. With this shooting option, using two hands leads to a rigid fixation of the device in the hand and the recoil is well absorbed by the palm, which allows for accurate hitting of targets located at a certain distance.

There are also other options for holding the device to fire a shot.

How the shot occurs:

Clip 7, when cocked to state "a" in Fig. 3, rests against rod 11, which in turn rests against valve rod 5. When the user presses the clip further (to state "b" in Fig. 4), it acts on valve rod 5 with the help of rod 11 and opens it. That portion of the gas that is in chamber 13 quickly exits through valve 5 into opening 6. The pressure in chamber 13 drops sharply, but since the gas exited quickly, the gas from chamber 15 cannot instantly equalize the pressure between chambers 13 and 15, so the gas presses with great force on light piston 4, instantly displacing it toward tube 12, thereby opening the gas passage into the barrel to impart energy to projectile 14. Projectile 14 is ejected from barrel 2.

Claims (6)

1. A pneumatic firing device in the form of a writing pen, containing a barrel, a piston and a trigger mechanism, characterized in that it contains a metal receiver with a valve for loading it with gas and firing a shot, and a trigger mechanism attached to the receiver by means of a thread and containing a lever with a pushing rod, made with the possibility of acting on the receiver valve rod to fire a shot, wherein the barrel is installed inside the receiver and is made with the possibility of loading it with a projectile from the muzzle, and the piston is placed inside the receiver, is made non-metallic, cup-shaped, ensuring complete overlap of the barrel cross-section, and has a petal check valve combined with a seal. 2. The device according to paragraph 1, characterized in that the projectile being thrown is a bullet or a dart. 3. The device according to paragraph 1, characterized in that compressed air, carbon dioxide, nitrogen, or mixtures for pneumatic weapons based on methane and propane can be used for charging. 4. The device according to item 1, characterized in that the piston is made of fluoroplastic. 5. The device according to item 1, characterized in that the barrel can be smooth or rifled. 6. The device according to item 1, characterized in that the petal valve combined with the seal can be made of rubber or silicone.