RU2413155C1 - Vacuum bow - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: vacuum bow includes fastening truss with handle. Fastening truss includes built-in vacuum pump with quick discharge valve and vacuum pump drive lever. Vacuum bow includes two pipes fixed at an angle to front part of fastening truss. One piston is located inside each pipe. One rotating unit for bow-string direction is fixed on ends of each pipe. Bow-string passes though units inward the pipes to pistons. Vacuum bow includes the channel connecting vacuum chambers of pipes with vacuum pump.

EFFECT: increasing tension force of bow-string.

2 dwg

Description

Technical field

Throwing weapons (throwing arrows). Designed for hunting, sports and recreational shooting.

State of the art

Vacuum onions are similar in appearance to simple or block onions. Vacuum onions differ from simple or block onions in a completely different way. The principle of operation of a vacuum bow is similar to the principle of operation "Spring of a vacuum-block throwing weapon", patent RU No. 23239452.

SUMMARY OF THE INVENTION

Creating a new type of throwing weapon.

Technical result

When designing a vacuum-block throwing weapon, we discovered the following phenomenon:

the pressure force of atmospheric air on the piston is constant at any point on the piston. Thus, the coefficient of accumulated energy of the vacuum elastic element = 1.

For example: the coefficient of accumulated energy of bending elements (shoulders of bows, crossbows) = 03. The coefficient of accumulated energy of torsion elements (torsion, tension-compression springs) = 05.

References: N.V. Gulia. "Energy storage." Publishing House "Science", Moscow: 1980.

Brief Description of the Drawings

The design of the claimed invention is illustrated by the following drawings:

figure 1 is a side view of the bowstring in the initial position, figure 2 is a side view of the bowstring in a taut state.

Device

The vacuum bow consists of a fastening farm 1 (Fig. 1; 2), which contains a handle 8 (Fig. 1; 2), an integrated vacuum pump 6 (Fig. 1; 2) with a quick release valve 10 (Fig. 1; 2) , lever 7 (Fig. 1; 2) of the vacuum pump drive. Two pipes 2 (figure 1; 2) are fixed at an angle to the front of the mounting truss 1 (figure 1; 2). Inside the pipes there is one piston 3 (Fig. 1; 2). Pistons have rubber seals.

At the ends of the pipes 2 (Fig. 1; 2), one block 4 is fixed (Fig. 1; 2). Through the blocks 4 passes the bowstring 5 (Fig. 1; 2) and is attached to the pistons 3 (Fig. 1; 2).

Channel 9 (Fig. 1; 2) in the mounting frame 1 (Fig. 1; 2) connects the vacuum chambers of pipes 2 (Fig. 1; 2) and a vacuum pump.

Work

In the work of the vacuum bow, the principle of the difference in gas pressure is used. In this case, the force of atmospheric pressure is used. The generally accepted average pressure force of the atmosphere is 1.06 kg / cm ² .

The piston diameter of the proposed vacuum bow 4.5 cm. The piston area at this diameter is 15.9 cm ² . The atmospheric pressure force on a given piston area is 16.85 kg. Since weapons have two pistons, the total atmospheric pressure force on two pistons is 33.7 kg. Consequently, the tension force of the string of the Vacuum Bow is 33.7 kg.

When the string 5 is pulled (FIG. 2), the blocks 4 (FIG. 2) rotate - they direct the string 5. The string 5 pulls the pistons 3 (FIG. 2) in the direction of the blocks 4 (FIG. 2). Pistons 3 move inside the pipe 2 (figure 2). The movement of the pistons 3 is counteracted by atmospheric pressure. The pressure force of the atmosphere on the pistons 3 (Fig. 1; 2) is constant (constanta) at any point of movement (location) of the piston 3 (Fig. 1; 2). When the piston 3 (Fig. 2) moves, the volume of the vacuum chamber (Fig. 2) inside the pipe 2 (Fig. 2) increases. Having reached blocks 4, the pistons 3 (Fig.2) stop - the bowstring is pulled, the weapon is ready to fire.

At the time of the shot bowstring 5 (figure 2) is released from retention. The atmosphere pressing on the pistons 3 (FIG. 2) makes them move to the vacuum region (FIG. 2), where the pressure is zero. When the piston 3 (Fig. 1; 2) moves to its original position, the volume of the vacuum chamber (Fig. 1) decreases. At the time of the shot, the pistons 3 freed from holding are moving with acceleration. Having reached the point of initial location, the pistons 3 (Fig. 1) pull the string 5 (Fig. 1), the boom is ejected.

During the operation of the vacuum onion, the formation of a small amount of air in vacuum chambers is possible (Fig. 1; 2). The air is removed by a vacuum pump 6 (Fig. 1; 2). The lever 7 (figure 1; 2) of the drive of the vacuum pump 6 for convenience is combined with the handle 8 (figure 1; 2). The quick-release valve 10 (figure 1; 2) allows for emergency vacuum vacuum bow, as well as the assembly and disassembly of weapons.

Claims (1)

A vacuum bow containing a fastening truss with a handle, a vacuum pump built into the fastening truss with a quick-release valve and a vacuum pump drive lever, two pipes fixed at an angle to the front of the fastening truss, inside of which there is one piston, and at the ends of the pipes are fixed one block, a bowstring passing through the blocks inside the pipes to the pistons, a channel connecting the vacuum chambers of the pipes with a vacuum pump.

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