WO2017052356A2

WO2017052356A2 - Seal for reducing the speed of projectiles fired by high-powered firearms

Info

Publication number: WO2017052356A2
Application number: PCT/MX2016/000094
Authority: WO
Inventors: Octavio Rodolfo Cibrian Vidrio; Fernando DOMÍNGUEZ QUEVEDO; Jorge Alberto DOMÍNGUEZ QUEVEDO
Original assignee: Octavio Rodolfo Cibrian Vidrio; Domínguez Quevedo Fernando; Domínguez Quevedo Jorge Alberto
Priority date: 2015-09-24
Filing date: 2016-09-26
Publication date: 2017-03-30
Also published as: MX2015013633A; WO2017052356A3

Abstract

The present invention relates to a seal for reducing the speed of projectiles fired by a high-powered firearms, designed to be incorporated inside a projectile recovery chamber of the type used in forensic ballistics laboratories in which experts or specialists perform studies to identify firearms and tool marks, also known as ballistic mechanical fingerprinting, which each firearm imprints particularly on the cartridge shells and projectiles fired by same. The reducer seal comprises a receptacle that is provided with a removable or hatch-type lid and contains a cartridge made from a material that reduces the speed of projectiles, the cartridge being inserted into the chamber such that the cartridge is positioned in the line of fire of the high-powered firearm in order to substantially reduce the speed of the projectile before it impacts the speed reducing means of the chamber.

Description

PROJECTILE SPEED REDUCING SEAL

SHOOTED BY HIGH-POWER FIREARMS

Field of the Invention

The invention pertains to the field of devices used to reduce projectile speed, and more particularly relates to a high-speed firearm projectile seal, which is designed to be incorporated into a recovery chamber of projectiles

BACKGROUND OF THE INVENTION

As described in Mexican Patent No. 329235 that protects a CAMERA FOR RECOVERY OF PROJECTILES, of which the co-owners of this patent application are also co-inventors, the purpose of such a camera is to recover projectiles that are fired inside. of said chamber with the purpose of obtaining the ballistic footprint of the projectile with the particular scratch that each firearm prints on it. As mentioned in the same document, the aforementioned chamber is commonly used in ballistics laboratories for forensic studies aimed at determining whether a specific firearm has been used in criminal acts that are investigated by the competent authorities.

Although the aforementioned patent chamber fully complies with the purpose for which it was created, the most frequent use of high-power firearms that are currently used in the commission of violent acts forces to implement other innovations or to incorporate additional equipment to that camera, or any other of that type, so that they can remain reliable in recovering fired projectiles that even coming from high-powered firearms do not suffer structural damage due to the fact that the camera does not have the necessary means to slow down projectile speed

In order to avoid resulting in the operation of said camera, and because the main purpose of this application is rather a device specially designed to be used therein, the structure and operation of said chamber, which can be consulted in patent document 329235.

SUMMARY OF THE INVENTION

The present invention consists of a projectile speed reducing seal fired by high power firearms, which is specially designed for use in a projectile recovery chamber. The reducing seal is an optional attachment that would be incorporated into said chamber when required by the need to recover projectiles fired by firearms whose power, if it exceeds the capacity of a conventional firing chamber, will affect the physical integrity of the fired projectile and with it the reliability of the ballistics test.

In a preferred embodiment of the invention, the projectile speed reducing seal is characterized in that it comprises:

- a receptacle that defines a conduit for the passage of a projectile fired by a firearm; said receptacle has an entrance and an exit;

- at least one disk placed at the beginning of the duct defined by the receptacle, which serves as a shock shield and dispenser of the gases produced by the deflagration of the gunpowder at the time of firing;

- a cover assembly that is coupled to the receptacle inlet to close it;

- a mechanism for opening and closing the lid to control access to the interior of the receptacle ;; Y

- at least one projectile speed reducing element, placed inside the receptacle in the displacement line of the fired projectile.

Although the above is considered the preferred embodiment of the reducing seal of the present invention, in the light of the following description and attached figures other variants or modifications in its structure can be deduced that will lead to the same result without departing from the inventive concept that is will describe later. BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a perspective view of the speed reducing seal of the present invention.

Figure 2 is an exploded view of the reducing seal to reveal its separate main components.

Figure 3 is an exploded view of the reducing seal that clearly shows the arrangement of its main components.

Figure 4 is a sectional view of the assembled reducer seal, which allows us to observe the arrangement of its elements,

Figure 5 is a perspective view in which a more detailed exploded view of the reducing seal of the present invention is shown.

Figure 6 is a schematic side view of the partially exploded sectioned seal to show the arrangement of its elements.

Figure 7 is a view showing the reducing seal in the process of being incorporated into a projectile recovery chamber.

Figure 8 is a view showing the partially sectioned chamber and the reducing seal being introduced thereto to be placed in the trajectory of the projectile fired by a weapon.

Figure 9 is a view showing the partially sectioned chamber and the reduction seal already placed in position at the entrance of said chamber.

Figure 10 is a rear view of the projectile recovery chamber that allows observing the speed reducer seal installed therein.

Figure 11 is a rear view of the reducing seal with the cover separated, to show its interconnection means.

Figure 12 is a rear perspective view, showing the reducing seal with its main parts exploded.

Figure 13 is a rear view of the chamber with the reducing seal showing a variant of the hatch-type cover.

Figure 14 is a rear view of the reducing seal with the hatch cover assembly separated from the receptacle. DETAILED DESCRIPTION OF THE MODE

PREFERRED OF THE INVENTION

Both the projectile recovery chamber, of the type described in Mexican Patent No. 329235, and the present invention consisting of a speed reducing seal of high power firearm projectiles, such as; rifles, rifles, carbines, machine guns, etc., of various nominal sizes, have a narrow application in the field of forensic ballistics laboratories, which in turn are linked to the judicial systems of administration of justice and also of the public security.

In such forensic ballistics laboratories, experts or experts especially carry out the studies of identification of firearms and tool marks, a discipline that is also known as the examination of the ballistic mechanical footprint, which particularly prints each firearm on the pockets and the projectiles that are fired by them.

In such a way that one of the universally known and applied techniques in ballistics, is to make test shots under a controlled laboratory environment, using the firearms that are required to examine for forensic effects, in order to obtain the witness ballistic samples (shells and projectiles) that will have the particular ballistic footprint of the firearm incorporated. However, obtaining the control samples in the best possible conditions and from projectiles fired by high-speed or high-power weapons has always been an important problem that is not so easy to solve.

This is because any type of material that offers resistance to the passage of a moving agent of the projectile type of firearm, will cause a destructive or altering effect, both in the material that offers the resistance, as in the projectile itself That makes contact with it. Therefore, it is logical to establish that the mass and velocity of a projectile fired by a firearm will determine its energy or ability to perform a job, which in the case of a bullet is to generate the greatest destructive effects, more particularly in the case of projectiles fired by high-powered firearms. Thus, the witness bullets must be collected in the best structurally possible conditions, trying to obtain a consistent reproduction of the ballistic mechanical footprint incorporated by the scratch of the barrel of a particular firearm, since they are necessary for the experts who require Perform comparative ballistics exams, this by using a comparison microscope, which when confronted with their similar ballistic elements, whether they are casings or shells collected as physical evidence of alleged criminal acts, will allow the expert to determine whether a firearm in has been used in an event investigated by the competent authority.

In order to assist in the important task of recovering projectiles of firearms, especially those that are classified as high power, under the appropriate conditions so that they can serve as suitable evidence or comparison elements, a seal is proposed reducer (100) designed to be incorporated into a projectile recovery chamber (200) such as that of Mexican patent 329235. The seal (100) has three main functions, the most relevant being substantially reducing the speed of projectiles fired by weapons from high power fire, before they enter the area where the recovery chamber contains its own projectile speed reducing means, usually a liquid or gel, to avoid damage or significant alterations in the cylindrical structure of the bullets that will be collected as control samples in the camera's own recovery system (200) and that are necessary to carry out studies of forensic ballistics, as the bullets will incorporate the particular ballistic mechanical footprint that will transfer the scratch of the firearm cannon that originally fired them.

Another very important function of the reducing seal (100) is to prevent the successive expulsion of portions of the liquid contained in the projectile recovery chamber, in the direction opposite to the natural trajectory that the fired bullets must follow. This results when projectiles fired into the chamber make violent contact with the liquid, causing the effects that Newton's Third Law imposes on us, which states that whenever an object (the fired projectile) exerts a force on a second object (the liquid contained in the chamber), it will exert a force of equal magnitude and direction, but in the opposite direction, on the first.

In our case, it means that the projectile fired, by exerting a violent force on the liquid, will cause a jet of it to be projected in the opposite direction to where the force was applied, an effect known in ballistics as a tail jet. Therefore, if the system coupled to the projectile recovery chamber (200) does not have an adequate seal and permanently in good condition, it will allow a large portion of the liquid contained in the chamber to be projected at high speed outside the equipment through the opening of the damaged seal and in the direction of the body of the camera user (200), as this would be who at that time would be firing the shots with a firearm and consequently would be affected by the liquid expelled towards his person .

The third function of the reducing seal (100), precisely is to keep it permanently in good condition, conceiving it as an interchangeable replacement, since the special design of the receptacle (10) and the seal itself (20) as a whole, allows the user to The chamber (200) can remove a damaged seal (20) and place a new spare at the time it deems convenient, in a friendly, fast and efficient way, because the ergonomics of this new system allows people to perform a procedure very simple, which consists of "pushing, turning, unlocking and removing" the front cover (30) of the receptacle (10) to have direct access to the seal (20) and easily remove or replace it, which is done in a few seconds.

The device (100) as a whole, which mainly houses the reduction seal (20) of projectile speed, designed to be incorporated into the projectile recovery chamber, such as that of Mexican Patent No. 329235, is It consists of the following modules:

- Receptacle (10) of the projectile speed reducing seal (Holder) The receptacle (10) consists of an essentially cylindrical shaped body, without this being interpreted as a limitation, by a plurality of plate hoops (16). Low density polyethylene, assembled to a flange (11) of stainless steel and connected by four rods (12) with thread (asparagus type) and stainless steel nuts. However, it should be noted that the The same receptacle (10) may consist of a one-piece tubular element. The receptacle has an inlet section (13a) that is coupled with a removable cover (30) and an outlet section (13b) through which the projectiles reach the chamber (200).

- Plasticized disc (15).

Near the inlet (13a) of the receptacle (10), a plasticized disc (15) with a core of woven cotton fibers is placed, which is fixed by means of guide pins (14) arranged in an eyebrow (19) of the flange (11) protruding into the inner wall of the receptacle. The disc (15) is an interchangeable replacement element and its function is to act as a shock shield of the gases that are produced by the deflagration of the gunpowder of the cartridges, which are projected at high speed and with high temperatures by mouth from the gun barrel that is fired.

The plasticized disc (15) makes it possible to stop and disperse the remaining gases from the combustion of the powder, in advance, during and after the drilling made by the fired projectile. As can be seen in the figures, this disk (15) is placed, within the structure of the receptacle (10), to the position of the seal (20) that reduces the speed of high-power projectiles.

- High power projectile speed reducer seal (20).

The speed reducing seal is made up of a cartridge (20) that will be used as a periodic replacement for the natural destruction that the progressive impacts of firearms projectiles will require on it, which are required to collect as witness samples to be used in studies forensics The chemical and physical conformation of the speed reducing cartridge (20) corresponds essentially to a flexible low density foam, based on a special chemical formulation and based on the reaction of a polyol and an isocyanate, whose exposure also allows the integration of different materials that are ordinarily used as speed reducers for projectiles fired by firearms, such as kevlar fibers, some variety of polymers, as well as silicons with special properties for such purposes. The aforementioned composition of the cartridge (20) substantially allows the mechanical reduction by friction and wear that is ordinarily caused by the erosion of projectiles fired by firearms by having dynamic contact with solid but soft and flexible materials at the same time, during their journey inside the cartridge (20) speed reducer.

The cartridge (20) has a plasticized disc (22, 24) with polyester fiber fabric core attached to each of its ends to help reduce the projectile speed and act as a seal to prevent the return of liquid from the camera in the direction of the shutter.

- Cover (30) of the reducer seal receptacle.

The cover assembly consists of a piece consisting of a short annular section (31), a flange (33) that is coupled with the flange (11) of the receptacle to be fixed in solidarity with it, and the cover (30) that is placed on the annular section (31) cuts, on the opposite end to the one where the flange (33) has been arranged, and which would become the entrance or access point inside the chamber (200) to make the shots.

In a first embodiment, the cover (30) is a removable element that controls access to the interior of the receptacle (10), and inherently to the chamber (200), and keeps them permanently closed as long as it is not necessary to open it for inspection or replacement of interchangeable parts (15, 20). In addition, the lid (30) incorporates ergonomic knobs (34), which allow the firm and convenient grip of both hands of the user, so that the user can remove the lid by pushing, turning and detaching the lid, as well as Your reverse procedure to re-fix in place. For convenience, the removable cover may include a means to hold it adhered to the receptacle when it is removed from its opening.

Likewise, the cover (30) has an opening (36) through which the barrel of the weapon to be fired and a glutton support (35) are introduced, specially designed to adapt to the varied shapes of the gun barrels of fire that will be fired, and that must be placed on it, in order to align them in the right direction and angle so that the bullets fired are directed directly to the speed reducer seal (20) and subsequently they are introduced to the liquid contained in the projectile recovery chamber (200).

In a variant, the cover is of the type of hatch (130) that by means of a lever (112), which functions as a bolt, located on the left side of the cover and the action of a hinge (114) integrated into the receptacle (110 ), located on the right side, the opening and closing of said cover (130) is controlled to allow access to the seal to remove it and / or replace it very easily.

The hinge (114) allows to open and close the lid at the will of the user of the system, and for the safe closing of the system there is a tilting lever (112) incorporated into the lid (130) and a knocker (115) incorporated into the receptacle (110), both located on the left side of the equipment, in such a way that the combination of the lever (112) and the knocker (115) perform the functions of locking the lid (130) of this second mode. - Removal mechanism and cover placement.

In the removable cover version, for easy and quick removal and placement of the cover (30) there is a mechanism that can be removed or placed by means of three simple movements. To do this, the cover (30) has curved grooves (32) that slide into guide screws (17) that are fixed to the receptacle (10). The gluttonic thyme (17) acts as a pole and each has a spring (not shown) that allows for forward pressure so that the lid remains immovable when the removal or attachment procedure is carried out.

By removing the cover (30) from the receptacle (10) you have direct access to the plasticized disc (15) and the seal or reducing cartridge (20) of the speed of the projectiles. In this way, the reducing cartridge (20) can be removed easily and quickly by the user of the equipment, either to replace it due to the normal deterioration caused by the effects of the continuous impacts of projectiles fired by high power weapons or because the cartridge (20) is not required because only short or low-power weapons are going to be fired. To remove the cartridge, it is only necessary to hold with one hand a handle or handle element (not shown), for example, a ribbon, which is attached to the plasticized disc (22) attached to the cartridge itself, and pull it out to remove it of the receptacle. As a technical reference, obtained from reliable ballistic tables for the caliber of the most commonly used rifles or rifles in the environment of public safety and organized crime, published by a major manufacturer of firearm cartridges in the (United States of America , as is the Winchester manufacturer, the following mass, speed and energy data are derived:

rifle / Pages / default.aspx

To provide a more objective idea about the differences between the speeds and energies that high-power firearms develop, compared to some of the most common calibers of low-power firearms, such as guns and revolvers, The following ballistic table is attached.

http://www.winchester.com/Products/handgun-ammunition/Value/Full-Metal-Jacket- handgun / Paqes / default aspx Although the invention has been described in the context of the preferred embodiments or embodiments, it will be apparent for a person skilled in the art that the scope of the inventive concept described by way of example extends beyond the design specifically described and illustrated to other possible alternative forms of materialization of the invention that can be deductible or derivable from the principles previously indicated . Thus, although the invention has been described in detail in its preferred conception, it will be deduced that some elements or components may be replaced by other analogues or other ones incorporated in the light of the foregoing description without implying that it is modified. the essence or nature of the claimed invention.

In view of the foregoing, it will be understood that several elements may be incorporated, combined with others or replaced by others to form alternative modes of realization that lead to the same result. Accordingly, it is intended that the scope of protection of the present invention not be interpreted solely on the basis of the embodiments described above but rather be determined by a reasonable interpretation of the content of the following claims.

It is pointed out that the best method for practicing the invention is that which would correspond to said invention according to its nature.

Claims

1. - A projectile speed reducing seal fired by high-powered firearms, for use in a projectile recovery chamber, comprising: - a receptacle defining a conduit for the passage of a projectile fired by a firearm fire; said receptacle has an inlet and outlet delimited by respective flanges;

- a disk placed next to the entrance of the receptacle, which serves as a shock shield and disperser of the gases produced by the deflagration of the gunpowder at the time of firing;

- a cover assembly that is coupled to the receptacle inlet to close it;

- a mechanism for opening and closing the lid to control access to the interior of the receptacle; Y

2. - The seal of claim 1, wherein the receptacle is constituted by a plurality of assembled rings.

3. - The seal of claim 1, wherein the receptacle is a single integral piece.

4. The seal of claim 1, wherein the disc is an interchangeable piece.

5. - The seal of claim 1, wherein the lid is removable so that it can be completely removed from the inlet opening of the receptacle.

6. - The seal of claim 1, wherein the opening and closing mechanism of the lid comprises the combination and coupling of curved grooves in said lid and spring bolts fixed to the receptacle so that said grooves can slide by exerting pressure on the lid and turning it to remove it from the receptacle or to fix it in it.

7. - The seal of claim 1, wherein the lid includes knobs or handles for handling when placed or removed from the receptacle.

8. - The seal of claim 1, wherein the cover is of the hatch type, thus including a hinge fixed to the receptacle and the combination of a lever and a knocker that act together as a bolt element of said cover.

9. The seal of claim 1, wherein the lid includes an opening for inserting through it the cardboard of the firearm to be fired.

10. - The seal of claim 1, wherein the speed reducing element consists of a cartridge that includes at each end a plasticized disc with a polyester fiber fabric core.

11. - The seal of claim 1, wherein the speed reducing cartridge is made of a material or combination of materials with speed reducing properties.

12. - The seal of claim 1, wherein the cartridge has a means to remove it from the receptacle when it is desired to replace it.

13. - In a projectile recovery chamber in which a gel with rheopic properties is used to stop the projectile fired by a firearm, and also uses a gel recirculation system to increase its viscosity in such a way that it stops the passage of the bullet and to attract the bullet towards the lowest part of the chamber and take it to a filter from where it is recovered; a projectile speed reducing seal fired by high-powered firearms, for use in a projectile recovery chamber, which comprises: - a receptacle that defines a conduit for the passage of a projectile fired by a firearm; said receptacle has an inlet and outlet delimited by respective flanges;

- a cover assembly that is coupled to the receptacle inlet to close it;

14. The seal of claim 13, wherein the receptacle is constituted by a plurality of assembled rings.

15. - The seal of claim 13, wherein the receptacle is a single integral piece.

16. - The seal of claim 13, wherein the disc is an interchangeable piece.

17. - The seal of claim 13, wherein the opening and closing mechanism of the lid comprises the combination and coupling of curved grooves in said lid and spring bolts fixed to the receptacle so that said grooves can slide exerting pressure on the cover and turning it to remove it from the receptacle or to fix it in it.

18. The seal of claim 13, wherein the lid includes knobs or handles to handle when placed or removed from the receptacle.

19. The seal of claim 13, wherein the cover is of the hatch type, thus including a hinge fixed to the receptacle and the combination of a lever and a knocker that act together as a bolt element of said cover.

20. The seal of claim 13, wherein the cover includes an opening for introducing through it the barrel of the firearm to be fired.

21. - The seal of claim 13, wherein the speed reducing element consists of a cartridge that includes at each end a plasticized disc with a polyester fiber fabric core.

22. - The seal of claim 13, wherein the speed reducing cartridge is made of a material or combination of materials with speed reducing properties.

23. - The seal of claim 13, wherein the cartridge has a means to remove it from the receptacle when it is desired to replace it.