A New Locked Breech Mechanism For Firearms

Abstract

The invention is related with a new locked breech mechanism for firearms, mounted in the frame (21) which allows for shortening the distance between the barrel (2) axis and contact point of the grip (10). The Slide (7) / breech (16) and the barrel (2) locked together at the point of firing. The inertia pushes the slide (7) / breech (16) and the barrel (2) backwards together for a certain distance. The mechanism disengages after certain amount of travel. The breech block (6) and short stroke main spring (1) are located in the frame (21) of the firearm allowing for shortening the distance between the barrel (2) axis and contact point of the grip (10).

Description

FIELD

[0001] The invention is related with a locked breech mechanism for firearms which allows for slide / breech block and barrel locked together at the point of firing. The inertia pushes the slide / breech block and barrel together for a certain distance. The mechanism disengages after a certain amount of travel.PRIOR ART

[0002] All weapons, capable of pushing bullet by the propulsion of powder gas are called firearm. Generally, the term firearm connotes any small caliber weapon carried by a person. However, the firearms include all sorts of weapons of any size from huge cannon to rifle and to pistol.

[0003] The principle of firing a projectile from a firearm is that when the propellant in bullet's casing is ignited, the propellant burns quickly for a very short time. This creates a high-pressure pocket of gas that expands, pushing the projectile (bullet) out of the chamber and down the barrel of the firearm. If the high-pressure gas were not confined within certain parts of the weapon, it could damage the firearm or injure the shooter.

[0004] Recoil is described by Newton's third law of motion, which states that for every action there is an equal and opposite reaction. This force is felt in the hand or on the shoulder when a person fires a handgun or a rifle. It takes the form of a quick sharp push away from the path the bullet is flying in and directly against the hand or shoulder of the shooter.

[0005] In the current state of art, there exist some methods to slow down the opening of the breech and manage the recoil.

[0006] A “locked breech” barrel confines the high-pressure gas to the barrel, allowing the gas to expand and cool without risk of damaging weapon or shooter. Locked breech is a design of a breech-reloading firearm's action and one way to slow down the opening of the breech of a self-reloading firearm when fired. The source of power for the movement is recoil.

[0007] On the other hand, muzzle flip (or muzzle climb) refers to the tendency of a firearm's muzzle (front end of the barrel) to rise upwards when the bullet exits the barrel after firing. It's mostly influenced by the recoil energy which is rearward energy generated when a bullet is discharged. It varies mostly based on firearm design, buffer system, slide / breech block mass & travel distance, bullet weight, muzzle velocity, combined recoil from multiple shots being fired in quick succession etc.

[0008] Muzzle flip occurs when a projectile exits the muzzle of a barrel, the resultant energy release causes the barrel to move. Normally, because of the way firearms are held by humans, the flip is upward and slightly to the weaker holding side. One way of reducing the muzzle flip may be reducing the distance between the barrel axis and contact point of the grip.

[0009] The term “frame” means a part of a handgun, or variants thereof, that provides housing or a structure for the component. The frame is the lower portion / body of the pistol or firearm.

[0010] The patent applications numbered as describe similar mechanisms.

[0011] The patent applications numbered as WO2019 / 029851A1 describe a breech block system for a firearm. Breech block and barrel arranged movably, wherein a control block and a locking block arranged movably. Wherein the locking block in a first position of breech-block system engages in an interlocking manner in the barrel, in the breech block and in the control block in such a way that the position of the barrel and the breech block in relation with one another is fixed. And in a second position of breech-block system engages in an interlocking manner only in the barrel and in the control block, and so in this position the breech block is movable relative to the barrel. In this design, control block is located under the chamber of the barrel which does not help to reduce the distance between the barrel axis and the contact point of the grip. On the other hand, locking block and locking block extensions (to fix the breech block) are tiny and perhaps disadvantageous.

[0012] The other patent application numbered as U.S. Pat. No. 5,347,912 describes a mechanism for decelerating the recoil of the moving parts of a firearm characterized in that between the slide and the barrel a lever hinged in the casing is activated, whereby this lever has a stop towards the front making contact with surface of the slide during only part of the recoil of said slide, whereby this recoil causes the lever to revolve until it no longer makes contact with the surface, whereby this lever also has a stop towards the end making contact with a surface of the barrel, such that during such revolving motion the barrel follows the recoil of the slide, but a lower speed with regard to lever. This design has some common understanding with the invention but different. It is located under the chamber of the barrel so does not help to reduce the distance between the barrel axis and contact point of the grip.

[0013] The other patent application numbered as U.S. Pat. No. 7,827,720 describes a standard Browning swinging barrel lock wherein at the instant of firing, barrel and breechblock remain locked with each other, recoil backward for a small distance, and then swing vertically away from each other via cam elements. This design is very different from the invention.

[0014] The other patent application numbered as US2007 / 0256344 describes a pistol including a grip, a barrel slide movable on the former in firing direction, and a barrel capable of being interlocked with the barrel slide. This design has some common understanding with the invention but different. It is located under the chamber of the barrel so does not help to reduce the distance between the barrel axis and contact point of the grip.

[0015] The other patent application numbered as US2011 / 0088304 describes a handgun having two slides. A rear slide that upon firing of a projectile moves backwards, and a front slide that upon firing a projectile move forward. This design is different from the invention.

[0016] The other patent applications numbered as US2010 / 148236 and US2013 / 0139677 describe a firearm having reduced recoil including a front slide connected to a rear slide by way of a slide link. This design is different from the invention.

[0017] The other patent application numbered as US2017356705 describes a recoil inversion assembly designed with an inversion construct comprising an inversion lever and a fulcrum, wherein the inversion lever is linked on one end of the inversion lever through a first lever-pivot pin to one or more transfer arms linked to a striker through a striker-pivot pin, and wherein the opposite end of the inversion lever is linked through a second lever-pivot pin to one or more transfer arms linked to a slide suitable for sliding along a recoil guide rod and compressing a recoil spring, such that the blowback from projectile is transferred through the recoil inversion assembly to a recoil spring positioned at an angle that is acute to the barrel, and thereby inverting the recoil. This design is different from the invention.

[0018] The other patent application numbered as US830511 describes an automatic gun where the gun barrel connected with the barrel extension is guided in the front wall of the gun-casing and by two guide and stop angle pieces and is guided at the rear by projections, arranged upon the barrel extension and which engage with corresponding guide strip of the casing. The forward movement of the barrel after recoil is affected by the spring. The firing pin is arranged in the bore of the breech block and is subjected to the influence of spring. Upon the axle the two sears firing sear and automatic sear-are rotatably mounted, the former being actuated by trigger. The sear retains the firing pin, which is cocked before the beginning of the return movement of the breech-block and is held in position until the breech is again held. This design has some common terminology with the invention but different from the invention.

[0019] The other patent applications numbered as RU2015147269, RU2015147270 and RU2015147271 describe a locking mechanism RU2015147271 containing the shutter frame, the bolt with the double-armed pivot arm mounted on it and the stop, the working surface of the locking end of the two-arm lever interacting with the cylindrical stop is made in the body of the cylindrical axis of the double-arm and is a portion of the concave cylindrical surface. This design is different from the invention.Object of the Invention

[0020] The object of the invention is a new locked breech mechanism which allows for shortening the distance between the barrel axis and contact point of the grip.

[0021] Another object of the invention is a new locked breech mechanism which allows for barrel and slide / breech block locked together at the point of firing. The inertia pushes the barrel and slide / breech block together for a certain distance which helps to lessen the peak recoil forces. The mechanism disengages after a certain amount of travel.

[0022] Another object of the invention is a new locked breech mechanism where the movement of all locked parts is initially tensioned by short stroke main spring.

[0023] Another object of the invention is to compensate slide stop force at approximately same axis of contact point of the grip for further reduction of muzzle flip.

[0024] Another object of the invention is a new slide design which allows for shortening the distance between the barrel axis and contact point of the grip.

[0025] Another object of the invention is a new locked breech mechanism which allows for an internal slide functioning inside the firearm so that a stationary cover attached to the top of the firearm which is advantageous for attachment of aiming devices and other accessories on the stational upper cover.DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1.A. View of the breech block. Both locked and disengaged positions.

[0027] FIG. 1.B. View of an alternative breech block. Both locked and disengaged positions.

[0028] FIG. 2. View of barrel.

[0029] FIG. 3. View of slide with cross section.

[0030] FIG. 4. View of slide with partial cross section.

[0031] FIG. 5. View of a handgun with new breech block.

[0032] FIG. 6. View of a handgun with breech block and internal slide.

[0033] FIG. 7. View of internal slide.Definitions of the References in the Drawings

[0034] 1. Main spring

[0035] 2. Barrel

[0036] 3. Barrel Extension

[0037] 4. Barrel pin

[0038] 5. Barrel guide

[0039] 6. Breech block

[0040] 6.1. Locking block

[0041] 6.2. Block link

[0042] 6.3. Block link pin

[0043] 6.4. Block spring

[0044] 7. Slide

[0045] 8. Recoil spring

[0046] 9. Recoil spring guide rod

[0047] 10. Grip

[0048] 11. Magazine

[0049] 12. Trigger

[0050] 13. Trigger guard

[0051] 14. Magazine release

[0052] 15. Firing assembly

[0053] 16. Breech

[0054] 17. Front sight

[0055] 18. Rear sight

[0056] 19. Charging handle

[0057] 20. Internal slide

[0058] 21. Frame

[0059] 22. Locking surface on barrel

[0060] 23. Locking surface on slide

[0061] 24. Notch

[0062] 25. Recoil spring housingDETAILED DESCRIPTION OF THE INVENTION

[0063] The invention is a new locked breech mechanism which allows for barrel (2) and slide (7) / breech (16) locked together at the point of firing by locking block (6.1). While all locked parts move backwards, locking block (6.1) moves backwards and downwards and so pulled between locked parts. Breech block (6) is mounted in the frame (21) which is lower body / portion of the firearm. More precisely all breech block (6) parts are mounted forward of the trigger guard (13) and below the barrel (2) in the frame (21), allowing for shortening the distance between barrel (2) axis and contact point of the grip (10).

[0064] Locking of the breech is provided by locking surface on barrel (22), which is an area on the barrel (2), which is almost perpendicular to barrel axis and so direction of the inertia and locking surface on slide (23) which is an area on the slide (7), which is also almost perpendicular to slide axis and so direction of the inertia, are locked by locking block (6.1).

[0065] Breech block (6) parts consists of locking block (6.1), block link (6.2), block link pin (6.3) and block spring (6.4). Breech block (6) may consist of one or more of the parts listed above.

[0066] In accordance with a preferred application of the invention, there exist another design with the same principle with less breech block (6) parts, which allows for barrel (2) and slide (7) / breech (16) locked with locking block (6.1) at the point of firing. The inertia pushes the barrel (2) and slide (7) / breech (16) backwards. Such movement pushes locking block (6.1) to move backwards and downwards and so pulled between locked parts. Breech block (6) mounted the frame (21) allowing for shortening the distance between barrel (2) axis and contact point of the grip (10).

[0067] In accordance with other preferred application of the invention, new breech block mechanisms are also applicable for fixed barrel firearms with / without main spring (1) if magnitude of inertia allows. Slide (7) / breech (16) locked with locking block (6.1) at the point of firing. The inertia pushes the slide (7) / breech (16) backwards for a certain distance. Such movement pushes locking block (6.1) to move backwards and downwards and so allowing slide (7) / breech (16) disengaged. Breech block (6) mounted the frame (21) allowing for shortening the distance between barrel (2) axis and contact point of the grip (10).

[0068] By the effect of the inertia, all locked parts which are slide (7) / breech (16), barrel (2) and locking block (6.1) move backwards together where the mentioned movement is initially tensioned by main spring (1) which is connected to the barrel (2).

[0069] Breech block (6) is designed such a way that keeps slide (7) / breech (16), barrel (2) and locking block (6.1) together for certain amount of distance. At the same time, movement of locking block (6.1) and block link (6.2) provides locking block (6.1) is pulled between locking surface on slide (23) and locking surface on barrel (22) smoothly.

[0070] While inertia pushes slide (7) / breech block (16) and the barrel (2) together for a certain distance. The combined weight of slide (7) / breech block (6) and barrel (2) helps to reduce the recoil. The mechanism disengages after certain amount of travel when locking block (6.1) is disengaged from slide (7) and barrel (2).

[0071] When slide (7) and barrel (2) are disengaged, the slide (7) continues to move backwards tensioned by recoil spring (8) and barrel (2) movement is continued to be tensioned by main spring (1).

[0072] A new slide (7) design is presented containing locking surface on slide (23) and notch (24). Slide (7) is connected to frame (21) with rails which allows for slide (7) moving on the frame (21) and around the barrel (2).

[0073] When firearm parts are assembled, the locking surface on barrel (22) is higher than locking surface on slide (23). The locking surface on slide (23) passes under the locking surface on barrel (22) since the height difference between locking surface on slide (23) and locking surface on barrel (22).

[0074] Notch (24) on the slide (7) and locking surface on barrel (22) are at same height. While slide (7) is moving backwards under the barrel (2), backward movement of slide (7) is stopped with notch (24) on the slide (7) and locking surface on barrel (22).

[0075] Barrel is connected to frame (21) of the firearm by means of barrel pin (4). Barrel extension (3) has a horizontally opened barrel pin (4) housing, allowing barrel (2) can move backwards and onwards. Barrel (2) movement is limited with barrel pin (4) in both directions. When barrel (2) is moving backwards, it moves against the tension of the main spring (1).

[0076] Main spring (1) tension is effective on slide (7) up to disengagement of slide (7) from barrel (2). Remaining main spring (1) tension, is reserved for slide (7) stop. At the end of the slide (7) travel when notch (24) on the slide (7) hits to locking surface on barrel (22), slide (7) stop force is compensated by recoil spring (8) and remaining tension on the main spring (1) which helps for softer stop of the slide (7).

[0077] Recoil spring (8) reciprocates the slide (7) onwards, while slide (7) is keeping the breech block (6) down and disengaged up to the end of the slide (7) travel.

[0078] Slide (7) moves onwards by recoil spring (8) up to breech (16) is stopped by barrel (2) and barrel (2) moves onwards by main spring (1) up to barrel pin stops (4) the barrel (2) movement and both are locked by locking block (6.1). And ready for the next cycle.

[0079] As illustrated in FIG. 1.A, Breech block (6) works in accordance with the principle explained above. Breech block (6) consists of locking block (6.1), block links (6.2), block pins (6.3) and block spring (6.4). Breech block (6) keeps the slide (7) / breech (16) and barrel (2) locked at the point of firing. The inertia pushes slide (7) / breech (16) and the barrel (2) together for a certain distance. While all locked parts move backwards, locking block (6.1) moves backwards and downwards and so pulled between locked parts. The breech block (6) disengages after a certain amount of travel when locking block (6.1) is disengaged from slide (7) and barrel (2). The height of the locking block (6.1) is different at barrel (2) side and at slide (7) side. Such height difference is needed to lock the locking surface on slide (23) and the locking surface on barrel (22). So, locking surface on slide (23) moves under the locking surface on barrel (22) when breech block (6) is disengaged.

[0080] As illustrated in FIG. 1.B, an alternative breech block (6) is shown. It functions with same principle explained above but with less parts. Barrel (2), and slide (7) / breech (16) locked together with locking block (6.1) at the point of firing. The inertia pushes the slide (7) / breech (16) and barrel (2) backwards together for a certain distance. While all locked parts move backwards, locking block (6.1) moves backwards and downwards and so pulled between locked parts.

[0081] As illustrated in FIG. 2, Barrel extension (3) has a horizontally opened barrel pin (4) housing, connected to barrel pin (4), allowing barrel (2) can move backwards and onwards. The location of the barrel extension (3) is for illustration purposes only and can be located somewhere else on the barrel (2). It is also illustrated that barrel guide (5) is a rail, attached to the barrel (2). Barrel guide (5) can be connected to frame (21) or slide (7) or both. The location of the barrel guide (5) is for illustration purposes only and can be located somewhere else on the barrel (2). Barrel guide (5) and barrel extension (3) provides barrel (2) keeping the same axis while barrel (2) is moving backwards and onwards to help accuracy of the firearm.

[0082] As illustrated in FIGS. 3 and 4, slide (7) contains breech (16), firing assembly (15), front sight (17) and rear sight (18). The locking surface on barrel (22) is higher than locking surface on slide (23). So that when breech block (6) is disengaged, the locking surface on slide (23) moves under the locking surface on barrel (22). Notch (24) on the slide (7) and locking surface on barrel (22) are at same height which stops the slide (7) movement backwards. Frame (21) and slide (7) have rails connected to each other which allows for slide (7) moving on the frame (21) and around the barrel (2). Slide (7) accommodates recoil spring housing (25).

[0083] As illustrated in FIG. 5, a handgun with new breech block contains main spring (1), barrel (2), barrel extension (3), barrel pin (4), barrel guide (5), breech block (6), slide (7), recoil spring (8), recoil spring guide rod (9), grip (10), magazine (11), trigger (12), trigger guard (13), magazine release (14), firing assembly (15), breech (16), front sight (17), rear sight (18), frame (21).

[0084] As illustrated in FIG. 6, a handgun with new breech block (6) and internal slide (20). A stationary cover attached to the top of the firearm. And a charging handle (19) is added to pull the internal slide (20) backwards for loading the firearm or emptying the chamber if already loaded.

[0085] As illustrated in FIG. 7, a new internal slide (20) design is presented. According to majority of the current slide design, breech (16) is located around the middle of the slide. But according to new internal slide (20) design, breech (16) is located at the end of the slide. This has certain advantages designing a stationary cover attached to the top of the firearm. Frame (21) and internal slide (20) have rails allowing internal slide (20) moving inside the firearm, around the barrel (2). When firearm parts are assembled, height of the locking surface on slide (23) of the internal slide (20) is lower than locking surface on barrel (22) so when breech block (6) is disengaged internal slide (20) can move under the barrel (2). But the height of the notch (24) on the internal slide (20) is same height with locking surface on barrel (22) which stops the internal slide (20) movement backwards. Breech (16) is located at the end of the internal slide (20) where frame (21) and internal slide (20) have rails allowing internal slide (20) moving inside the firearm, around the barrel (2).

[0086] In accordance with preferred application of the invention, recoil spring (8) and recoil spring rod (9) are located at lower side of the barrel (2).

[0087] In accordance with other preferred applications of the invention, recoil spring (8) and recoil spring rod (9) are located at the upper side of the barrel (2).

Examples

Embodiment Construction

[0063]The invention is a new locked breech mechanism which allows for barrel (2) and slide (7) / breech (16) locked together at the point of firing by locking block (6.1). While all locked parts move backwards, locking block (6.1) moves backwards and downwards and so pulled between locked parts. Breech block (6) is mounted in the frame (21) which is lower body / portion of the firearm. More precisely all breech block (6) parts are mounted forward of the trigger guard (13) and below the barrel (2) in the frame (21), allowing for shortening the distance between barrel (2) axis and contact point of the grip (10).

[0064]Locking of the breech is provided by locking surface on barrel (22), which is an area on the barrel (2), which is almost perpendicular to barrel axis and so direction of the inertia and locking surface on slide (23) which is an area on the slide (7), which is also almost perpendicular to slide axis and so direction of the inertia, are locked by locking block (6.1).

[0065]Breec...

FIELD

[0001] The invention is related with a locked breech mechanism for firearms which allows for slide / breech block and barrel locked together at the point of firing. The inertia pushes the slide / breech block and barrel together for a certain distance. The mechanism disengages after a certain amount of travel.PRIOR ART

[0002] All weapons, capable of pushing bullet by the propulsion of powder gas are called firearm. Generally, the term firearm connotes any small caliber weapon carried by a person. However, the firearms include all sorts of weapons of any size from huge cannon to rifle and to pistol.

[0003] The principle of firing a projectile from a firearm is that when the propellant in bullet's casing is ignited, the propellant burns quickly for a very short time. This creates a high-pressure pocket of gas that expands, pushing the projectile (bullet) out of the chamber and down the barrel of the firearm. If the high-pressure gas were not confined within certain parts of the weapon, it could damage the firearm or injure the shooter.

[0004] Recoil is described by Newton's third law of motion, which states that for every action there is an equal and opposite reaction. This force is felt in the hand or on the shoulder when a person fires a handgun or a rifle. It takes the form of a quick sharp push away from the path the bullet is flying in and directly against the hand or shoulder of the shooter.

[0005] In the current state of art, there exist some methods to slow down the opening of the breech and manage the recoil.

[0006] A “locked breech” barrel confines the high-pressure gas to the barrel, allowing the gas to expand and cool without risk of damaging weapon or shooter. Locked breech is a design of a breech-reloading firearm's action and one way to slow down the opening of the breech of a self-reloading firearm when fired. The source of power for the movement is recoil.

[0007] On the other hand, muzzle flip (or muzzle climb) refers to the tendency of a firearm's muzzle (front end of the barrel) to rise upwards when the bullet exits the barrel after firing. It's mostly influenced by the recoil energy which is rearward energy generated when a bullet is discharged. It varies mostly based on firearm design, buffer system, slide / breech block mass & travel distance, bullet weight, muzzle velocity, combined recoil from multiple shots being fired in quick succession etc.

[0008] Muzzle flip occurs when a projectile exits the muzzle of a barrel, the resultant energy release causes the barrel to move. Normally, because of the way firearms are held by humans, the flip is upward and slightly to the weaker holding side. One way of reducing the muzzle flip may be reducing the distance between the barrel axis and contact point of the grip.

[0009] The term “frame” means a part of a handgun, or variants thereof, that provides housing or a structure for the component. The frame is the lower portion / body of the pistol or firearm.

[0010] The patent applications numbered as describe similar mechanisms.

[0011] The patent applications numbered as WO2019 / 029851A1 describe a breech block system for a firearm. Breech block and barrel arranged movably, wherein a control block and a locking block arranged movably. Wherein the locking block in a first position of breech-block system engages in an interlocking manner in the barrel, in the breech block and in the control block in such a way that the position of the barrel and the breech block in relation with one another is fixed. And in a second position of breech-block system engages in an interlocking manner only in the barrel and in the control block, and so in this position the breech block is movable relative to the barrel. In this design, control block is located under the chamber of the barrel which does not help to reduce the distance between the barrel axis and the contact point of the grip. On the other hand, locking block and locking block extensions (to fix the breech block) are tiny and perhaps disadvantageous.

[0012] The other patent application numbered as U.S. Pat. No. 5,347,912 describes a mechanism for decelerating the recoil of the moving parts of a firearm characterized in that between the slide and the barrel a lever hinged in the casing is activated, whereby this lever has a stop towards the front making contact with surface of the slide during only part of the recoil of said slide, whereby this recoil causes the lever to revolve until it no longer makes contact with the surface, whereby this lever also has a stop towards the end making contact with a surface of the barrel, such that during such revolving motion the barrel follows the recoil of the slide, but a lower speed with regard to lever. This design has some common understanding with the invention but different. It is located under the chamber of the barrel so does not help to reduce the distance between the barrel axis and contact point of the grip.

[0013] The other patent application numbered as U.S. Pat. No. 7,827,720 describes a standard Browning swinging barrel lock wherein at the instant of firing, barrel and breechblock remain locked with each other, recoil backward for a small distance, and then swing vertically away from each other via cam elements. This design is very different from the invention.

[0014] The other patent application numbered as US2007 / 0256344 describes a pistol including a grip, a barrel slide movable on the former in firing direction, and a barrel capable of being interlocked with the barrel slide. This design has some common understanding with the invention but different. It is located under the chamber of the barrel so does not help to reduce the distance between the barrel axis and contact point of the grip.

[0015] The other patent application numbered as US2011 / 0088304 describes a handgun having two slides. A rear slide that upon firing of a projectile moves backwards, and a front slide that upon firing a projectile move forward. This design is different from the invention.

[0016] The other patent applications numbered as US2010 / 148236 and US2013 / 0139677 describe a firearm having reduced recoil including a front slide connected to a rear slide by way of a slide link. This design is different from the invention.

[0017] The other patent application numbered as US2017356705 describes a recoil inversion assembly designed with an inversion construct comprising an inversion lever and a fulcrum, wherein the inversion lever is linked on one end of the inversion lever through a first lever-pivot pin to one or more transfer arms linked to a striker through a striker-pivot pin, and wherein the opposite end of the inversion lever is linked through a second lever-pivot pin to one or more transfer arms linked to a slide suitable for sliding along a recoil guide rod and compressing a recoil spring, such that the blowback from projectile is transferred through the recoil inversion assembly to a recoil spring positioned at an angle that is acute to the barrel, and thereby inverting the recoil. This design is different from the invention.

[0018] The other patent application numbered as US830511 describes an automatic gun where the gun barrel connected with the barrel extension is guided in the front wall of the gun-casing and by two guide and stop angle pieces and is guided at the rear by projections, arranged upon the barrel extension and which engage with corresponding guide strip of the casing. The forward movement of the barrel after recoil is affected by the spring. The firing pin is arranged in the bore of the breech block and is subjected to the influence of spring. Upon the axle the two sears firing sear and automatic sear-are rotatably mounted, the former being actuated by trigger. The sear retains the firing pin, which is cocked before the beginning of the return movement of the breech-block and is held in position until the breech is again held. This design has some common terminology with the invention but different from the invention.

[0019] The other patent applications numbered as RU2015147269, RU2015147270 and RU2015147271 describe a locking mechanism RU2015147271 containing the shutter frame, the bolt with the double-armed pivot arm mounted on it and the stop, the working surface of the locking end of the two-arm lever interacting with the cylindrical stop is made in the body of the cylindrical axis of the double-arm and is a portion of the concave cylindrical surface. This design is different from the invention.Object of the Invention

[0020] The object of the invention is a new locked breech mechanism which allows for shortening the distance between the barrel axis and contact point of the grip.

[0021] Another object of the invention is a new locked breech mechanism which allows for barrel and slide / breech block locked together at the point of firing. The inertia pushes the barrel and slide / breech block together for a certain distance which helps to lessen the peak recoil forces. The mechanism disengages after a certain amount of travel.

[0022] Another object of the invention is a new locked breech mechanism where the movement of all locked parts is initially tensioned by short stroke main spring.

[0023] Another object of the invention is to compensate slide stop force at approximately same axis of contact point of the grip for further reduction of muzzle flip.

[0024] Another object of the invention is a new slide design which allows for shortening the distance between the barrel axis and contact point of the grip.

[0025] Another object of the invention is a new locked breech mechanism which allows for an internal slide functioning inside the firearm so that a stationary cover attached to the top of the firearm which is advantageous for attachment of aiming devices and other accessories on the stational upper cover.DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1.A. View of the breech block. Both locked and disengaged positions.

[0027] FIG. 1.B. View of an alternative breech block. Both locked and disengaged positions.

[0028] FIG. 2. View of barrel.

[0029] FIG. 3. View of slide with cross section.

[0030] FIG. 4. View of slide with partial cross section.

[0031] FIG. 5. View of a handgun with new breech block.

[0032] FIG. 6. View of a handgun with breech block and internal slide.

[0033] FIG. 7. View of internal slide.Definitions of the References in the Drawings

[0034] 1. Main spring

[0035] 2. Barrel

[0036] 3. Barrel Extension

[0037] 4. Barrel pin

[0038] 5. Barrel guide

[0039] 6. Breech block

[0040] 6.1. Locking block

[0041] 6.2. Block link

[0042] 6.3. Block link pin

[0043] 6.4. Block spring

[0044] 7. Slide

[0045] 8. Recoil spring

[0046] 9. Recoil spring guide rod

[0047] 10. Grip

[0048] 11. Magazine

[0049] 12. Trigger

[0050] 13. Trigger guard

[0051] 14. Magazine release

[0052] 15. Firing assembly

[0053] 16. Breech

[0054] 17. Front sight

[0055] 18. Rear sight

[0056] 19. Charging handle

[0057] 20. Internal slide

[0058] 21. Frame

[0059] 22. Locking surface on barrel

[0060] 23. Locking surface on slide

[0061] 24. Notch

[0062] 25. Recoil spring housingDETAILED DESCRIPTION OF THE INVENTION

[0063] The invention is a new locked breech mechanism which allows for barrel (2) and slide (7) / breech (16) locked together at the point of firing by locking block (6.1). While all locked parts move backwards, locking block (6.1) moves backwards and downwards and so pulled between locked parts. Breech block (6) is mounted in the frame (21) which is lower body / portion of the firearm. More precisely all breech block (6) parts are mounted forward of the trigger guard (13) and below the barrel (2) in the frame (21), allowing for shortening the distance between barrel (2) axis and contact point of the grip (10).

[0064] Locking of the breech is provided by locking surface on barrel (22), which is an area on the barrel (2), which is almost perpendicular to barrel axis and so direction of the inertia and locking surface on slide (23) which is an area on the slide (7), which is also almost perpendicular to slide axis and so direction of the inertia, are locked by locking block (6.1).

[0065] Breech block (6) parts consists of locking block (6.1), block link (6.2), block link pin (6.3) and block spring (6.4). Breech block (6) may consist of one or more of the parts listed above.

[0066] In accordance with a preferred application of the invention, there exist another design with the same principle with less breech block (6) parts, which allows for barrel (2) and slide (7) / breech (16) locked with locking block (6.1) at the point of firing. The inertia pushes the barrel (2) and slide (7) / breech (16) backwards. Such movement pushes locking block (6.1) to move backwards and downwards and so pulled between locked parts. Breech block (6) mounted the frame (21) allowing for shortening the distance between barrel (2) axis and contact point of the grip (10).

[0067] In accordance with other preferred application of the invention, new breech block mechanisms are also applicable for fixed barrel firearms with / without main spring (1) if magnitude of inertia allows. Slide (7) / breech (16) locked with locking block (6.1) at the point of firing. The inertia pushes the slide (7) / breech (16) backwards for a certain distance. Such movement pushes locking block (6.1) to move backwards and downwards and so allowing slide (7) / breech (16) disengaged. Breech block (6) mounted the frame (21) allowing for shortening the distance between barrel (2) axis and contact point of the grip (10).

[0068] By the effect of the inertia, all locked parts which are slide (7) / breech (16), barrel (2) and locking block (6.1) move backwards together where the mentioned movement is initially tensioned by main spring (1) which is connected to the barrel (2).

[0069] Breech block (6) is designed such a way that keeps slide (7) / breech (16), barrel (2) and locking block (6.1) together for certain amount of distance. At the same time, movement of locking block (6.1) and block link (6.2) provides locking block (6.1) is pulled between locking surface on slide (23) and locking surface on barrel (22) smoothly.

[0070] While inertia pushes slide (7) / breech block (16) and the barrel (2) together for a certain distance. The combined weight of slide (7) / breech block (6) and barrel (2) helps to reduce the recoil. The mechanism disengages after certain amount of travel when locking block (6.1) is disengaged from slide (7) and barrel (2).

[0071] When slide (7) and barrel (2) are disengaged, the slide (7) continues to move backwards tensioned by recoil spring (8) and barrel (2) movement is continued to be tensioned by main spring (1).

[0072] A new slide (7) design is presented containing locking surface on slide (23) and notch (24). Slide (7) is connected to frame (21) with rails which allows for slide (7) moving on the frame (21) and around the barrel (2).

[0073] When firearm parts are assembled, the locking surface on barrel (22) is higher than locking surface on slide (23). The locking surface on slide (23) passes under the locking surface on barrel (22) since the height difference between locking surface on slide (23) and locking surface on barrel (22).

[0074] Notch (24) on the slide (7) and locking surface on barrel (22) are at same height. While slide (7) is moving backwards under the barrel (2), backward movement of slide (7) is stopped with notch (24) on the slide (7) and locking surface on barrel (22).

[0075] Barrel is connected to frame (21) of the firearm by means of barrel pin (4). Barrel extension (3) has a horizontally opened barrel pin (4) housing, allowing barrel (2) can move backwards and onwards. Barrel (2) movement is limited with barrel pin (4) in both directions. When barrel (2) is moving backwards, it moves against the tension of the main spring (1).

[0076] Main spring (1) tension is effective on slide (7) up to disengagement of slide (7) from barrel (2). Remaining main spring (1) tension, is reserved for slide (7) stop. At the end of the slide (7) travel when notch (24) on the slide (7) hits to locking surface on barrel (22), slide (7) stop force is compensated by recoil spring (8) and remaining tension on the main spring (1) which helps for softer stop of the slide (7).

[0077] Recoil spring (8) reciprocates the slide (7) onwards, while slide (7) is keeping the breech block (6) down and disengaged up to the end of the slide (7) travel.

[0078] Slide (7) moves onwards by recoil spring (8) up to breech (16) is stopped by barrel (2) and barrel (2) moves onwards by main spring (1) up to barrel pin stops (4) the barrel (2) movement and both are locked by locking block (6.1). And ready for the next cycle.

[0079] As illustrated in FIG. 1.A, Breech block (6) works in accordance with the principle explained above. Breech block (6) consists of locking block (6.1), block links (6.2), block pins (6.3) and block spring (6.4). Breech block (6) keeps the slide (7) / breech (16) and barrel (2) locked at the point of firing. The inertia pushes slide (7) / breech (16) and the barrel (2) together for a certain distance. While all locked parts move backwards, locking block (6.1) moves backwards and downwards and so pulled between locked parts. The breech block (6) disengages after a certain amount of travel when locking block (6.1) is disengaged from slide (7) and barrel (2). The height of the locking block (6.1) is different at barrel (2) side and at slide (7) side. Such height difference is needed to lock the locking surface on slide (23) and the locking surface on barrel (22). So, locking surface on slide (23) moves under the locking surface on barrel (22) when breech block (6) is disengaged.

[0080] As illustrated in FIG. 1.B, an alternative breech block (6) is shown. It functions with same principle explained above but with less parts. Barrel (2), and slide (7) / breech (16) locked together with locking block (6.1) at the point of firing. The inertia pushes the slide (7) / breech (16) and barrel (2) backwards together for a certain distance. While all locked parts move backwards, locking block (6.1) moves backwards and downwards and so pulled between locked parts.

[0081] As illustrated in FIG. 2, Barrel extension (3) has a horizontally opened barrel pin (4) housing, connected to barrel pin (4), allowing barrel (2) can move backwards and onwards. The location of the barrel extension (3) is for illustration purposes only and can be located somewhere else on the barrel (2). It is also illustrated that barrel guide (5) is a rail, attached to the barrel (2). Barrel guide (5) can be connected to frame (21) or slide (7) or both. The location of the barrel guide (5) is for illustration purposes only and can be located somewhere else on the barrel (2). Barrel guide (5) and barrel extension (3) provides barrel (2) keeping the same axis while barrel (2) is moving backwards and onwards to help accuracy of the firearm.

[0082] As illustrated in FIGS. 3 and 4, slide (7) contains breech (16), firing assembly (15), front sight (17) and rear sight (18). The locking surface on barrel (22) is higher than locking surface on slide (23). So that when breech block (6) is disengaged, the locking surface on slide (23) moves under the locking surface on barrel (22). Notch (24) on the slide (7) and locking surface on barrel (22) are at same height which stops the slide (7) movement backwards. Frame (21) and slide (7) have rails connected to each other which allows for slide (7) moving on the frame (21) and around the barrel (2). Slide (7) accommodates recoil spring housing (25).

[0083] As illustrated in FIG. 5, a handgun with new breech block contains main spring (1), barrel (2), barrel extension (3), barrel pin (4), barrel guide (5), breech block (6), slide (7), recoil spring (8), recoil spring guide rod (9), grip (10), magazine (11), trigger (12), trigger guard (13), magazine release (14), firing assembly (15), breech (16), front sight (17), rear sight (18), frame (21).

[0084] As illustrated in FIG. 6, a handgun with new breech block (6) and internal slide (20). A stationary cover attached to the top of the firearm. And a charging handle (19) is added to pull the internal slide (20) backwards for loading the firearm or emptying the chamber if already loaded.

[0085] As illustrated in FIG. 7, a new internal slide (20) design is presented. According to majority of the current slide design, breech (16) is located around the middle of the slide. But according to new internal slide (20) design, breech (16) is located at the end of the slide. This has certain advantages designing a stationary cover attached to the top of the firearm. Frame (21) and internal slide (20) have rails allowing internal slide (20) moving inside the firearm, around the barrel (2). When firearm parts are assembled, height of the locking surface on slide (23) of the internal slide (20) is lower than locking surface on barrel (22) so when breech block (6) is disengaged internal slide (20) can move under the barrel (2). But the height of the notch (24) on the internal slide (20) is same height with locking surface on barrel (22) which stops the internal slide (20) movement backwards. Breech (16) is located at the end of the internal slide (20) where frame (21) and internal slide (20) have rails allowing internal slide (20) moving inside the firearm, around the barrel (2).

[0086] In accordance with preferred application of the invention, recoil spring (8) and recoil spring rod (9) are located at lower side of the barrel (2).

[0087] In accordance with other preferred applications of the invention, recoil spring (8) and recoil spring rod (9) are located at the upper side of the barrel (2).

Examples

Embodiment Construction

[0063]The invention is a new locked breech mechanism which allows for barrel (2) and slide (7) / breech (16) locked together at the point of firing by locking block (6.1). While all locked parts move backwards, locking block (6.1) moves backwards and downwards and so pulled between locked parts. Breech block (6) is mounted in the frame (21) which is lower body / portion of the firearm. More precisely all breech block (6) parts are mounted forward of the trigger guard (13) and below the barrel (2) in the frame (21), allowing for shortening the distance between barrel (2) axis and contact point of the grip (10).

[0064]Locking of the breech is provided by locking surface on barrel (22), which is an area on the barrel (2), which is almost perpendicular to barrel axis and so direction of the inertia and locking surface on slide (23) which is an area on the slide (7), which is also almost perpendicular to slide axis and so direction of the inertia, are locked by locking block (6.1).

[0065]Breec...

Claims

1. It is a locked breech mechanism for firearms which allows for slide (7) / breech (16) and barrel (2) locked together at the point of firing and inertia pushes slide (7) and breech (16) for certain amount of distance; characterized by comprising; all breech block (6) parts are mounted forward of trigger guard (13) and below the barrel (2) in a frame (21), including a locking block (6.1) moves backwards and downwards and pulled between locked parts.

2. According to claim 1, it is locked breech mechanism for firearms characterized by comprising; breech block (6) consists of locking block (6.1), block links (6.2), block pins (6.3) and block springs (6.4) where backwards movement pulls locking block (6.1) between slide (7) and barrel (2).

3. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising; height of the locking block (6.1) is different at barrel (2) side and slide (7) side.

4. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising; movement of all locked parts is initially tensioned by short stroke main spring (1).

5. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising; breech block (6) and main spring (1) are located in the frame (21).

6. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising;barrel extension (3) has a horizontally opened barrel pin (4) housing, allowing barrel (2) can move backwards and onwards andbarrel guide (5) is a rail, attached to the barrel (2), connected to frame (21) or slide (7) or both.

7. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising; backwards barrel (2) movement is tensioned by main spring (1) which is a separate spring from recoil spring (8).

8. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising; backwards movement of combined weight of slide (7) / breech (16), barrel (2) and locking block (6.1) is initially tensioned by main spring (1) at level of contact point of the grip (10).

9. According to claim 1, it is a locked breech mechanism for firearms; characterized by comprising; frame (21) and slide (7) have rails connected to each other which allows for slide (7) moving on the frame (21) and around the barrel (2) and containing locking surface on barrel (22), notch (24) and / or recoil spring housing (25).

10. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising; the slide (7) is tensioned by recoil spring (8) and the barrel (2) is continued to be tensioned by main spring (1) when disengaged.

11. According to claim 2, it is a locked breech mechanism for firearms characterized by comprising; the breech block (6) may consist of one or more of the locking block (6.1), block links (6.2), block pins (6.3) or block springs (6.4).

12. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising; the locking block (6.1) locks the slide (7) / breech (16) at the point of firing.

13. According to claim 1, it is a locked breech mechanism (6) for firearms characterized by comprising; recoil spring (8) and main spring (1) compensate the slide (7) stop force at the end of the slide (7) travel when notch (24) on the slide (7) hits to locking surface on barrel (22).

14. According to claim 1, it is a locked breech mechanism for firearms characterized by comprising; breech (16) is located at the end of the internal slide (20) where frame (21) and internal slide (20) have rails allowing internal slide (20) moving inside the firearm, around the barrel (2).

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