A bolt assembly improved for rotary barrel firearms

Abstract

The present invention generally relates to a firearm bolt for rotary barrel firearm group, which includes a rotatable head and a body carrying the entire system, and the ammunition loaded on the housing channels and rotor, enabling firing of the ammunition and the removal of the empty cartridge from the system after firing.

Description

[0001] A BOLT ASSEMBLY IMPROVED FOR ROTARY BARREL FIREARMS

[0002] TECHNICAL FIELD

[0003] The present invention generally relates to a firearm bolt for rotary barrel firearm group, which includes a rotatable head and a body carrying the entire system, and the ammunition loaded on the housing channels and rotor, enabling firing of the ammunition and the removal of the empty cartridge from the system after firing. The present invention relates to a firearm bolt for rotary barrel firearm systems which receives the loaded ammunition from the feed unit, brings the ammunition to the chamber through the channel in the rotor and housing, fires the ammunition and ensures the removal of the empty cartridge from the system after firing.

[0004] BACKGROUND OF THE INVENTION

[0005] Conventional rotary barrel firearms, despite having the same calibers as single-barrel weapons, can inflict greater damage due to multiple barrels rotating at high speeds.

[0006] These systems perform loading, firing, and unloading functions simultaneously in different barrels, cooling the barrels during rotation and the entire rotor assembly can rotate. Rotarybarreled firearms contain multiple barrels mounted on a rotor, which are driven sequentially by a motor. In the firing position, one round is fired from the firing barrel at a time, and this cycle continues in a synchronized manner.

[0007] US Patent No. US9587895B1 describes firearms in general, and more specifically, rotarybarreled firearms and a bolt assembly therefor. The rotary-barreled firearms described in US9587895B1 comprise a plurality of barrels mounted on a rotor that is sequentially driven by a motor. Ammunition attached to the belt is first fed into the weapon by entering the disconnector / feed system. This system removes individual rounds from their connections on the belt and feeds them individually into each of the rotating channels in the rotor, each of which has a bolt assembly corresponding to a barrel.

[0008] The firearm bolt assembly which is one of the most important elements of rotary-barreled firearms systems, is a mechanical part complex that has a rotating head and a body that carries the entire system, carries the loaded ammunition on the housing channels and rotor, and enables the firing of the ammunition and the removal of the empty cartridge from the system after firing.

[0009] US Patent No. US3611866 describes the bolt assembly used in rotary-barreled firearm systems. The bolt assembly generally comprises a main body, head, firing pin, and main spring. A pair of longitudinal side channels are created in the main body to allow the bolt assembly to move along the rotor track elements. These side channels form the guide surfaces for the movement of the bolt assembly along the rotor track element. The side channels described in US3611866 have semicylindrical, circular surfaces without any angular structure.

[0010] Similarly, US Patent No. US9587895B1 discloses a bolt assembly for rotary barrel firearms (Figure 2). The bolt assembly of US9587895B1 , similar to prior art bolt assemblies, such as that of document US3611866, has a bolt assembly head and bolt assembly carrier or "a body." The bolt assembly head and body interface with one or two rotation-generating cam structures, each comprising a helical cam arm and a corresponding helical cam slot. The bolt assembly of US9587895B1 , similar to that of document US3611866, includes a pair of longitudinal side channels on the main body portion that serve as guide surfaces for the bolt assembly to be moved on the rotor track elements, and these side channels (guide surfaces) (8) have semi-cylindrical, circular surfaces without any angular structure (Figure 2).

[0011] It has been observed that the circular guide surfaces found in bolt assemblies on the state of the art, do not provide as good a sliding performance in practice as they do in theory. Due to the centrifugal effect, some of the semicircular guides do not compress, causing wear and deformation on the guide surfaces on the bolt assemblies and on the rotor guides. Furthermore, problems arise in the production and assembly of the components that affect the motion in bolt assemblies with circular guide surfaces. These problems include high labor force and production costs, as well as deformation of the parts during assembly.

[0012] The problems mentioned above make it necessary to make an innovation in the relevant technical field. SUMMARY OF THE INVENTION

[0013] The invention relates to the improvements made for the bolt assembly used in rotary barrel firearm systems in order to eliminate the above-mentioned disadvantages and bring new advantages to the relevant technical field.

[0014] A basic problem in bolt assemblies (A) that are included in the state of the art is that the circular guide surfaces (8) in bolt assemblies do not provide as good a sliding as they do in theory, during the advancement movement on the rotor (11 ) (details not shown in the pictures). This is because of the high friction in practice. The other major problem is not being pressed of some of the semicircles due to the centrifugal effect, In order to reduce the problem, improvements have been made on the guide surfaces (8) of the bolt assembly on the invention. Thanks to the guiding structure of the invention, better sliding and press is achieved by reducing friction. Furthermore, on the bolt assemblies in the state of the art, the micro-roughnesses that occur on the surfaces during the machining of circular surfaces are more pronounced than those during the machining of planar surfaces. Therefore, in the present invention, the guide surfaces of the bolt assemblies contain planar surfaces, rather than the semi-cylindrical circular structure in the state of the art. Thus, the present invention enables the reduction of surface roughness values and the improvement of the quality of the guide surfaces.

[0015] Additionally, the present invention reduces man-hour and production costs in the production and assembly of parts that affect the movement of bolt assembly with circular guide surfaces, which are included in the state of the art, and also reduces problems with deformation of parts during assembly. The creation of circular guide surfaces, which are included in the state of the art, requires specialized cutting tools. However, in the embodiment of the invention, it is possible to machine the guide surfaces with cutting tools commonly and routinely used in industry.

[0016] In order to overcome the problem in question, with the present invention, the guiding surfaces of the bolt assembly have a structure that includes at least two planar surfaces and junction corners where these surfaces come together at an angle to each other, instead of the circular structure in the semi-cylindrical guiding surfaces of the prior art, which do not contain an angular structure. The junction corner(s) where the surfaces meet at an angle to each other can be a “sharp-edged”, i.e. cornered structure, creating an intersection in a linear line, or the junction corner(s) can be a “non-sharp-edged”, i.e. curved structure, not containing any corners. Preferably, the guiding surfaces of the bolt assembly of the present invention have a sharp-edged form with a polygonal angle, having at least two planar surfaces and at least one corner where these surfaces come together to form an angle with each other. Therefore, the guide surfaces which are the subject of the invention form a channel where single cornered surfaces in the shape of a “V”, two cornered surfaces in the shape of a “n” or planar surfaces come together to include more corners. The guide surface in question more preferably forms a channel comprising three planar surfaces and two junction corners where these three surfaces come together at an angle to each other and form an intersection in a linear line, that is, it comprises a channel in the shape of

[0017] BRIEF DESCRIPTION OF THE DRAWINGS

[0018] According to one or more various examples, the present invention is explained in detail with reference to the following figures. The drawings are provided for illustrative purposes only and show examples of the invention only. These drawings are provided to facilitate the reader's understanding of the invention and are not to be construed as limiting the scope or applicability of the invention. For clarity and ease of illustration, it should be noted that these drawings are not shown to scale.

[0019] Figure 1 : Rotary Barrel Firearm

[0020] Figure 2: Front View of the Bolt Assembly Known in the Prior Art

[0021] Figure 3: Front and Top View of the Bolt Assembly

[0022] Figure 4: Back and Top View of the Bolt Assembly

[0023] Figure 5a: Front and Bottom View of the Bolt Assembly

[0024] Figure 5b: Back and Bottom View of the Bolt Assembly

[0025] Figure 6a: Detail View of the Bolt Assembly

[0026] Figure 6b: Top Detail View of the Bolt Assembly Figure 7: Detail View of the Bolt Assembly

[0027] Figure 8: Detailed View of the Bolt Assembly in (a) Free, (b) Spring Compressed and (c) Shooting Positions

[0028] Figure 9(a): Alternative views of the “sharp-edged” configurations of the guide surfaces.

[0029] Figure 9(b): Alternative views of the “non-sharp-edged” configurations of the guide surfaces.

[0030] REFERENCE NUMBERS

[0031] The reference numbers of the elements included in the figures are explained below.

[0032] A. Bolt Assembly

[0033] 1 . Bolt Assembly Front Part

[0034] 2. Bolt Assembly Rear Part

[0035] 3. Release Pin

[0036] 4. Spring

[0037] 5. Roller

[0038] 6. Compression Pin

[0039] 7. Firing Pin

[0040] 8. Guide surfaces

[0041] 9. Front Part Helical Cam Surface

[0042] 10. Rear Part Helical Cam Surface

[0043] 11 . Rotor

[0044] 20. Many Barrels

[0045] 40. Ammunition channel

[0046] 50. Housing

[0047] 60. Cam Track

[0048] DETAILED DESCRIPTION

[0049] In this detailed description, the subject of the invention is explained only with examples that will not create any limiting effect on the better understanding of the subject. As representatively shown in Figure 1 , the current rotary barrel firearm systems used in the state of the art generally have a plurality of barrels (20) mounted on a rotor (11) that is driven sequentially by a motor. The ammunition, which is connected to each other with ammunition cartridges in the form of a strip, is first installed on the weapon by opening the cover of the separation and feeding mechanism, and the ammunition separated from the ammunition cartridges by the separation mechanism is pushed into the ammunition channels (40) by the elements of the feeding mechanism and the bolt assembly (A). The ammunition is moved ahead along a cam track (60) with the bolt assembly (A) until it is loaded into the barrel (20) and fired. The bolt assembly (A) then move back, releasing the empty ammunition case for ejection. Moving ahead and back of the bolt assembly (A) are achieved by the interaction of a cam roller (roller) positioned on the upper surface of the bolt assembly (A) and the helical cam track (60) formed within the housing (50). As the rotor (11) rotates in a cycle, the cam roller follows the cam track (60) and adjusts the position of the bolt assembly (A) on the rotor (11 ) depending on where the bolt assembly (A) and rotor (11) are positioned within the cycle.

[0050] The invention relates to the development on a bolt assembly structure that enables the empty cartridge case to be removed from the system after firing in rotary barrel firearm systems, as shown as an example in Figure 1 and Figure 3.

[0051] The subject of the invention in generally relates to a firearm bolt for rotary barrel firearm group, which includes a a rotatable head and a body carrying the entire system, and the ammunition loaded on the housing channels and rotor, enabling firing of the ammunition and the removal of the empty cartridge from the system after firing. The bolt assembly in question enables the loaded ammunition to be taken from the feed unit, the ammunition to be brought to the chamber through the channel in the rotor and housing, the ammunition to be fired and the empty cartridge case to be removed from the system after firing.

[0052] The bolt assembly, which is one of the important elements of rotary barrel weapon systems, is a mechanical part complex consisting of a bolt assembly front part (1 ) which acts as a movable head, a bolt assembly rear part (2) which has the task of carrying the entire system, and which carries the loaded ammunition on the housing channels and rotor, enabling the firing of the ammunition and the removal of the empty cartridge from the system after firing.

[0053] The bolt assemblies used in rotary barrel firearm systems consist of the following basic elements: bolt assembly front part (1), bolt assembly rear part (2), release pin (3), spring (4), roller (5), compression pin (6), firing pin (7), guide surfaces (8), front part helical cam surface (9) and rear part helical cam surface (10).

[0054] In more detail, it consists of the bolt assembly (A) which enables the ejection of the empty cartridge case from the system after firing for rotary barrel firearm systems, the bolt assembly rear part (2), the bolt assembly front part (1 ) which takes different positions with respect to the bolt assembly rear part (2) by rotating around the longitudinal central axis of the bolt assembly (A), the firing pin (7) which provides the mechanical driving force required for firing and ensures the explosion of the ammunition, the spring (4) which gives the impulse to the firing pin (7), the compression pin (6) located at the rear of the spring (4) and holding the spring (4), the rotating mechanism roller (5) located at the upper part of the bolt assembly rear part (2) which allows the bolt assembly (A) to move forward in the channels on the housing, and the release pin (3) located on the upper surface of the bolt assembly (A).

[0055] The bolt assembly (A) has a front part (1) and a rear part (2) with channel-shaped slide surfaces (8) along the axial length of the bolt assembly (A) on the side faces. This allows the bolt assembly (A) to move forward over the guide surfaces on the rotor (11). The bolt assembly (A) comprises guide surfaces (8) that form bedding surfaces formed by a pair of longitudinal channels on two side surfaces along the axial length of the bolt assembly front part (1) and bolt assembly rear part (2).

[0056] The bolt assembly front part (1 ) is the part that moves with the movement of the bolt assembly (A) on the rotor (11) and takes different positions (Figures 8 (a), (b) and (c)) depending on this movement, enabling the firing pin and the transport of the ammunition. The bolt assembly rear part (2) is the main carrier part where the guiding surfaces (8) that allow the bolt assembly (A) to move forward on the guide surfaces on the rotor (11) and where the bolt assembly (A) components are located. The release pin (3) provides the necessary angle and stop for the bolt assembly (A) to take the firing positions and to load the spring.

[0057] The release pin (3) is located on the upper surface of the bolt assembly (A), preferably on the bolt assembly front part (1 ). The spring (4) is the part that impels the bolt assembly (7) to provide the mechanical thrust necessary for firing. The roller (5) is located on the upper part of the bolt assembly rear part (2) and is the rotating mechanism part that allows the bolt assembly (A) to mover forward in the channels located on the housing. The compression pin (6) is the part located at the rear of the spring (4) that is installed to provide the mechanical thrust necessary for firing and that holds the spring (4). The firing pin (7) is the part that provides the mechanical thrust necessary for firing and enables the ammunition to explode. The guide surfaces (8) refer to the bedding surfaces formed by a pair of longitudinal channels on the two side surfaces of the bolt assembly (A), bolt assembly front part (1) and bolt assembly rear part (2), which, together with the guiding surfaces of the rotor (11) allow the bolt assembly to advance on the rotor (11 ). Therefore, the guiding surfaces of the rotor (11 ) include surfaces corresponding to the guide surfaces (8) formed by the said channels, which are located on a pair of longitudinal sides of the bolt assembly, to be placed in the hollow.

[0058] The guide surfaces (8), formed by a pair of longitudinal channels on the two lateral surfaces of the bolt assembly (A), the bolt assembly front part (1) and the bolt assembly rear party (2), comprise at least two flat planar surfaces and at least one junction corner or corners where these surfaces meet at an angle to each other. The junction corner(s) where the surfaces meet at an angle to each other may be "sharp-edged" (Figure 9a), i.e., angular, or may have a "non-sharp-edged" (Figure 9b), i.e., a curved structure, meaning they do not contain corners. Within the scope of the present invention, the term "sharp-edged" refers to structures that include corners (Figure 9a); the term "non-sharp-edged" refers to curved structures that do not contain corners (Figure 9b).

[0059] Preferably, the guide surfaces (8), which are formed by a pair of longitudinal channels on the two side surfaces of the bolt assembly (A), the bolt assembly front part (1) and the bolt assembly rear part (2), which are the subject of the present invention, have a sharp-edged form with a polygonal angle, that is, an angular form, with at least two planar surfaces and at least one corner where these surfaces meet at an angle to each other (Figure 9a). Therefore, the guide surfaces (8) form a single corner in the shape of a "V" with two planar surfaces and one corner where these surfaces meet at an angle to each other, a two-cornered channel in the shape of a "n" with three planar surfaces and two corners where these surfaces meet at an angle to each other, or a polygonal channel where the planar surfaces come together to include more corners.

[0060] More preferably, the guide surfaces (8) formed by a pair of longitudinal channels on the two side surfaces of the bolt assembly (A), the bolt assembly front part (1 ) and bolt assembly rear part (2) sections of the invention, in particular, form a channel comprising three planar surfaces and two junction corners where these three surfaces come together at an angle to each other, forming an intersection on a linear line, in other words, they comprise a channel in the shape of In the preferred embodiment of the invention, the guide surfaces (8) are structured to include two junction corners where in particular three surfaces come together at an angle to each other, forming an intersection on a linear line, forming 90° angle, i.e., a right angle.

[0061] Thanks to the improvements explained above made to the guide surfaces (8) that form the bedding surfaces formed by a pair of longitudinal channels on two side surfaces along the axial length of the bolt assembly front part (1) and bolt assembly rear part (2) of the bolt assembly (A), the problem of the circular guide surfaces (8) in the bolt assembly (A) not being able to slide as well as theoretically due to high friction during the advancement movement of the bolt assembly (A) on the rotor (11) in the bolt assembly included in the state of the art, and the problem of some of the semicircular circles not being able to press due to the centrifugal effect, has been reduced. Thanks to the guide structure in question, better sliding has been achieved by reducing friction and better pressing has been achieved. In addition, since the guide surfaces of the bolt assembly in the present invention include a structure containing planar surfaces, the present invention ensures a reduction in surface roughness values and an increase in the quality of the guide surfaces. In addition, the present invention provides for the reduction of man / hour costs and production costs in the production and assembly of the parts affecting the movement of the bolt assembly structures with circular guide surfaces included in the state of the art, and also the reduction of the problems of deformation of the parts during assembly.

Claims

CLAIMS1 . A bolt assembly for rotary barrel firearm systems comprising; a bolt assembly rear part (2), a bolt assembly front part (1 ) which rotates around the longitudinal central axis of the bolt assembly (A) and takes different positions compared to the bolt assembly rear part (2), a firing pin (7) which provides the mechanical thrust force required for firing and ensures the explosion of the ammunition, a spring (4) which gives the thrust to the n firing pin (7), a compression pin (6) located at the rear of the spring (4) and holding the spring (4), the rotating mechanism roller (5) which allows the bolt assembly (A) to move forward in the channels on the housing, a release pin (3) located on the upper surface of the bolt assembly (A), and guide surfaces (8) that form the bedding surfaces formed by a pair of longitudinal channels on two side surfaces along the axial length of the bolt assembly (A), bolt assembly front part (1 ) and bolt assembly rear part (2) sections of the bolt assembly (A), which enable the bolt assembly (A) to move on the guiding surfaces of the rotor (11), characterized in that:• the guide surfaces (8) that form the bedding surfaces formed by a pair of longitudinal channels on the two side surfaces along the axial length of the bolt assembly (A) bolt assembly front part (1) and bolt assembly rear part (2) sections have at least two planar surfaces and at least one junction corner where these surfaces come together at an angle to each other, forming an intersection in a linear line.

2. The bolt assembly (A) of claim 1 characterized in that, the guide surfaces (8) that form the bedding surfaces formed by a pair of longitudinal channels on two side surfaces along the axial length of the bolt assembly (A) bolt assembly front part (1) and bolt assembly rear part (2) sections, have at least two planar surfaces and at least one junction corner where these surfaces come together at an angle to each other, forming an intersection in a linear line, and have a sharp-edged structure.

3. The bolt assembly (A) of claim 1 characterized in that, the guide surfaces (8) that form the bedding surfaces formed by a pair of longitudinal channels on two side surfaces along the axial length of the bolt assembly (A) bolt assembly front part (1) and bolt assembly rear part (2) sections, have at least two planar surfaces and at least one junction corner where these surfaces come together at an angle to eachother, forming an intersection in a linear line, and have a structure that does not contain corners and does not have sharp edges.

4. The bolt assembly (A) of claim 1 characterized in that, the guide surfaces (8) that form the bedding surfaces formed by a pair of longitudinal channels on two side surfaces along the axial length of the bolt assembly (A) bolt assembly front part (1) and bolt assembly rear part (2) sections, contain three planar surfaces and two junction corners where these three surfaces come together at an angle to each other, forming an intersection on a linear line.

5. The bolt assembly (A) of claim 4 characterized in that, the two junction corners where three surfaces come together at an angle to each other and form a linear intersection are in a sharp-edged structure or in a non-sharp-edged structure that does not contain corners.

6. The bolt assembly (A) of claim 5 characterized in that, it contains two junction corners where three surfaces meet at right angles to each other, creating a linear intersection and the junction corners in question are either sharp-edged or have a non-sharp-edged structure that does not contain corners.

7. The bolt assembly (A) of claim 6 characterized in that, It contains two junction corners where three surfaces meet at right angles to each other, creating a linear intersection and the junction corners in question have a sharp-edged structure

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