MX2012004821A

MX2012004821A - Projectile recovery chamber.

Info

Publication number: MX2012004821A
Application number: MX2012004821A
Authority: MX
Inventors: Octavio Rodolfo Cibrian Vidrio; Fernando Dominguez Quevedo; Jorge Alberto Dominguez Quevedo
Original assignee: Jorge Armando Haro Covarrubias
Priority date: 2012-04-25
Filing date: 2012-04-25
Publication date: 2013-10-24
Also published as: US20150084284A1; AR092824A1; CA2871580C; WO2013162348A1; CO7141455A2; CA2871580A1

Abstract

The invention relates to a chamber for the recovery of projectiles, or a bullet trap, which uses a gel having rheopectic properties in order to stop the bullet and which also uses a gel recirculation system in order to increase viscosity such that it stops the passage of the bullet. In addition, the recirculation system attracts the bullet towards the lowest part of the chamber and directs same towards a basket type filter from where the bullet is recovered. The dimensions of the projectile recovery chamber are such that it is easy to transport and the chamber includes a raising mechanism that can be used to adjust the height of the chamber according to the height of the shooter, as well as including a positioning device and a distributed logic control system for stopping and starting the pump.

Description

PROJECTILE RECOVERY CHAMBER DESCRIPTION TECHNICAL FIELD OF THE INVENTION The present invention relates to a projectile recovery chamber or also known as a ballistic trap which is to provide a projectile recovery chamber of reduced dimensions that allows the recovery of a projectile in a short time, obtaining the samples with the trace ballistic, of the particular scratched that prints each firearm, consistently reproduced, eliminating possible alterations in the marks of the cannon on the bullet. To a large extent, this helps forensic experts make their comparative determinations more accurately.

Background of the invention: In the forensic studies that are ordinarily carried out in ballistic laboratories, they are aimed at establishing whether a particular firearm has fired at the origin of bullets or caequillos that were collected as evidence of alleged criminal acts. There are currently different solutions in the market to achieve this objective but they do it in an inadequate or inefficient way and above all, it takes too much time to achieve the recovery of witness projectiles for forensic use.

During the review and analysis of the state of the art, the United States patent application US 2005/0093243 A1 of Steven L. Larson, et. al., published May 5, 2005. The document refers to a retainer for projectile deceleration and capture in general, includes a support structure having an inclined surface and a projectile trap means disposed on the inclined surface. The means of capture i The projectile can be a ballistic resistant granular medium or a combination of a hydrated ballistic medium with a super absorbent polymer (SAP) gel. Preferably, the support structure is made of a shock absorber, foam, concrete reinforced with fibers, such as sacon (R). In the different modalities, the support structure also includes a box. The additives can also be mixed in the projectile capture medium to control the alkalinity and prevent the leaching of heavy metals.

The above-mentioned invention, in addition to not being applied for the recovery of witness bullets for forensic use, does not contain the same configuration as the invention to be protected. It is not a camera, but rather an open trap to catch projectiles, where a means of capture is used, which may be among other options a super absorbent polymer (SAP) gel.

The patent application of Spain ES 2049964 of the company Impresa Construzioni Soc. FRA SA to RL was found, entitled "Assembly and separation unit for ballistic projectile arrest devices", which refers to a unit that allows the transport of the mixture. of the impact material and of the exploded projectiles and separating the latter before said impact material is sent back to the top of the pile of impact material.

In this application the only relevant thing is the separation of the projectiles from the impact material, before the latter is sent to recirculation, and that is not applied in the recovery of witness bullets for forensic use.

The Spanish patent application ES2061892 of Kanauf, Peter et al. Where a projectile retaining material is used consisting of a thermoplastic material that brakes and / or collects the projectiles, characterized in that the layer (1, 20) consists of at least one piece molded (10) of thermoplastic synthetic material which is stable in its form at room temperature and which at a temperature of at most 200 ° C, preferably 150 ° C, has a viscosity that allows it to be drained and where the thermoplastic material can be completely removed from the projectile by simple heating.

Japanese Patent JP4101642 refers as a problem to resolving the recovery of scattered bullets that have been fired and accumulated against a bank built behind a target, where there is almost no recovery work and it is still not possible to recover and recycle the bullets. The proposed solution is an impact receiver that has a sufficiently thick gel material is stored in a bag and placed behind the lens.

Although the solution proposed by the Japanese application includes the use of a gel to capture the bullets, it does not mention the reopéctic characteristics of the gel and does not mention that the gel is in continuous movement. Besides that it does not have an application for forensic ballistics.

U.S. Patent Application US 2009/0303982 relates to an apparatus for the inductive braking of a projectile, wherein the apparatus has a unidirectional conductor with a closed conduction path surrounding the passage of the projectile in motion. The unidirectional conductor allows current to flow through it substantially in a single direction along the entire corridor. As the projectile and its associated movement move through the unidirectional conductor, the movement of the magnetic field induces a current flow through the closed conductive path, which in turn generates a magnetic field behind the projectile with the same polarity than the field of the projectile. Both fields are attracted to each other, so much that a braking force is exerted on the projectile and tends to align the magnetic fields. The alignment of these fields centers the projectile away from the wall of the apparatus.

Because the unidirectional conductor allows the current to flow substantially only in the direction that produces a field having the same polarity as the field in motion, the opposite polarity repulsive of a magnetic field that could otherwise generate a deviation of the projectile to its He passed.

Another invention to trap projectiles is the "Snail" deceleration chamber that consists of a deceleration chamber with a reduced entrance angle that guides the projectile to a circular chamber where the projectile revolutionizes until losing energy falling for its collection, leaving the remains of deformed or fragmented projectiles and therefore are not usable in forensic studies.

Various inventions have been developed to catch projectiles, but none of those that have been found include a modular system in which the length of the chamber can be increased, no cameras have been found that occupy a reopéctico fluid to stop the projectile and even less , cameras that have a positioning system for the proper placement of the firearm.

Other systems use horizontal water tanks that are quite heavy both for their metal structure and for the amount of water they must contain. These systems do not have an automatic projectile recovery system.

Other types of recovery systems use fibers such as Kevlar or cotton to retain the projectiles, which makes the recovery of the projectile difficult.

Therefore, there is no system in the market or in the State of the Art to recover projectiles or a chamber for the recovery of witness projectiles for forensic use, such as the one we are proposing.

BRIEF DESCRIPTION OF FIGURES Figure 1 is a side view of the projectile recovery chamber Figure 2 shows different views of the flanges joining the cylindrical modules that make up the different sections of the projectile recovery chamber.

Figure 3 are different views of the cylindrical modules that make up the projectile recovery chamber.

Figure 4 shows the assembly of the flanges with the cylindrical modules.

Figure 5 is a view of the assembly of flanges, gaskets and cylindrical modules.

Figure 6 is a perspective view of the projectile recovery chamber where the sections that make up the chamber are appreciated.

Figure 7 is a side view of the firing chamber in the inclined position as it should be placed.

Figure 8 is a detail of the assembly of the front cover of the projectile recovery chamber.

Figures 9 (a-d) are different views of the assembled front cover of the projectile recovery chamber.

Figures 10 (a-c) shows different views of the back cover of the projectile recovery chamber.

Figure 11 is a plan view of the metal platform of the projectile recovery chamber.

Figure 12 is a detail of one of the supports that join the projectile recovery chamber with the metal platform.

Figure 13 shows the mechanisms of height adjustment, damping and the transfer cart for the projectile recovery chamber.

Figure 14 is a perspective view of the projectile recovery chamber.

DETAILED DESCRIPTION OF THE INVENTION: According to figure 1, the projectile recovery chamber (1) of the present invention consists of a cylindrical body formed by coupled cylindrical sections (2), whose number can vary depending on the length required for the recovery chamber. of projectiles (1), being at least three, where the cylindrical sections (2), are preferably made of stainless steel and are joined by flanges (4) with an intermediate package (5).

According to figure 1, the projectile recovery chamber (1) at its rear end has one with a hydraulic system consisting of a self-suction pump (6) having a basket-type filter (7) which serves for the recovery of the fired projectile, a suction pipe (8) that draws a fluid from the projectile recovery chamber (1) through the suction hole (27) and a return pipe (9) that returns the fluid to the interior of the projectile recovery chamber (1) through the return orifice (26); The hydraulic system is controlled by a PLC Programmable Logic Controller that is located on a control board (3). The rear cover of the chamber (10) is a plate that covers the circular rear end of the projectile recovery chamber (1) and has a vertical projection (28) upwards in relation to the back cover, to finish off in a fold which forms a horizontal surface (29) with an internal angle less than ninety degrees where the self-suction pump (6) and the basket-type filter (7) are supported; the projectile recovery chamber (1) has in its front part a lid called lid front of the chamber (11) having a rectangular hole (35) through which the gun barrel is inserted and a basket for capturing caps (12) for the capture and recovery of automatic weapon caps. The projectile recovery chamber is supported by anterior (13) and posterior (14) supports that are coupled to a metallic platform (15), said supports take the form of a circular section (fig.12) of a cylindrical section (2). ) forming the projectile recovery chamber (1) and joined by screws to the flanges (4), wherein said supports slide on grooves, two rear grooves (16a and 16b) that are parallel and a central groove (17) ) passing through the metal platform (15) that supports the projectile recovery chamber (l); wherein the rear support (14) slides on the rear grooves (16a and 16b) passing through the metal platform (15) and the front support (13) slides on a central groove (17) that traverses the metal platform (15). ). In the lower part of the metal platform (15) the rear support (14) is coupled to a pneumatic damper (18) which is aligned longitudinally with the metal platform (15), where the front end of the pneumatic damper (18) is it is fixed to the metallic platform (15) and its rear end is attached to the rear support (14) of the projectile recovery chamber (1), so that if there is a displacement of the projectile recovery chamber (1). ), this travels along the metal platform (15), because the supports slide through the rear grooves (16a and 16b) and central groove (17), but its travel is stopped by the pneumatic shock absorber (18). ) that is attached to the back support (14), in such a way that it allows the return of the projectile recovery chamber (1) to its initial position.

The metal platform (15), Fig. 11 has on its lower face means for coupling to the industrial cart (19); between the industrial cart (19) and the metal platform (15), there is a lifting mechanism (20) that allows to modify the position of the front end of the camera recovery of projectiles (1), adjusting its elevation to the height of the shooter or to the person who operates the weapon. The cart has wheels (21) for industrial use to support the weight of the whole. The assembly also has a control board (3) to drive the self-suction pump (6) when the gun is positioned in the rectangular hole (35).

The industrial trolley (19) has on its upper face a pair of rear bearings (22) and a pair of front journals (23) coupled each pair with a steel bar (24), the bearings on the back (22) they allow a mobile coupling between the metal platform (15) and the industrial cart (19), while the journals on the front part (23) are at the center of the cart and serve to hold the lifting mechanism (20) on the side back of the same mechanism, allowing a mobile coupling by means of a steel bar (24); additionally, two lower journals (25) are attached to the lower face of the metal platform (15) and in turn allow the front part of the lifting mechanism (20) to be held, leaving the lifting mechanism (20) held in place after the front journals (23) that are attached to the front of the industrial cart (19) and the lower bearings (25) attached to the front of the metal platform (15) on its underside.

According to figures 2 to 5, the projectile recovery chamber is constructed by joining three or more cylindrical sections (2) by means of flanges (4) that allow one section to be held with the other. For example, three cylindrical sections (2) are joined by flanges (4) between which a gasket (5) made with a high density polymer is placed to prevent leakage of the fluid. Once the cylindrical sections (2) have been joined, the rear cover of the chamber (10) consisting of a circular section having two holes is placed; a return hole (26), at the center of the circular section and a suction hole (27) in the lower part of the circular section, the rear cover is fastened to the body of the chamber by means of a flange (4) and a packing (5) to prevent leakage. The rear cover of the chamber (10) shown in figure 5, has a vertical projection (28) that extends in the vertical direction of the upper part of the circumference of the rear cover of the chamber (10) and at its end upper, the vertical projection (28) has a double at an angle such that it forms a horizontal surface (29) where the self-suction pump (6) will rest.

The front cover of the chamber (1 1) shown in figure 6, is formed by two circular steel plates a front plate (30) and a back plate (31) joined by a steel ring (32) of 10 cm width, wherein the back plate (31) engages with the upper flange of the projectile recovery chamber (1); in the same back plate of the front cover (31), a circular hole (33) of two inches in diameter was made by where the projectiles will pass to the projectile recovery chamber (1). Likewise and specifically on the side of the back plate (31) that has contact with the liquid of the chamber, two flexible polymer covers adhered to a steel sheet (not shown) were installed, which performs the function of soul, elaborating in its center small transversal cuts in the shape of a star, where such a structure has the function of opening and closing quickly when each bullet is fired into the projectile recovery chamber (1), in this way the evacuation of the fluid towards the outside of the projectile recovery chamber (1). In the middle of the two plates is a centering device (34) or "V" shaped guide of about three inches in length that is mounted on the rear plate (31) of stainless steel, where a powerful permanent magnetic field is generated by small magnets (36) that are placed in the lower part of the centering device (34), where the magnetic field has the function of attracting and correcting the direction of the guns and frames of steel of firearms.

For its part, in the previous plate was made in its center a cut to form a rectangular hole (35) three inches high by two inches wide, in the lower part of the rectangular hole (35) is installed the Centering Device (3. 4). The height of the rectangular hole (35) allows the introduction of gun barrels that have very high front sights incorporated, as in the case of rifles type AK-47.

MODE OF OPERATION OF THE INVENTION: A fundamental component of the present invention is that unlike other firing chambers, it does not use water, pellets, or fibers. Instead it uses a ballistic gel that has been specially developed for this application.

The gel used is a gel with reopécticas properties, that is to say, in its normal state it behaves like a liquid, but when maintaining it in constant movement and rapid agitation, the gel behaves like an elastic solid that increases its viscosity substantially, reason why It offers a greater resistance to the passage of the projectiles, in such a way that it stops them at a shorter distance and without producing traces other than the particular scratching of the gun barrel, since the gel tends to wrap and capture the bullets as if it were a three-dimensional network that is formed by the particles suspended in water, so it does not generate a substantial erosion on the structure of the projectiles.

The gel used has a property called reopexy that corresponds to the behavior of non-Newtonian fluids. In this type of fluids, the viscosity varies in relation to the temperature and the shear applied, in such a way that the gel used does not have a defined and constant viscosity value.

To take advantage of the properties of the gel it has been necessary to find the right direction and the amount of gel flow that must be driven by a self-suction pump (6) into the interior of the projectile recovery chamber.

From figure 5 it can be seen that the main body of the projectile recovery chamber (1) is constructed by three cylindrical sections (2); for this case stainless steel type 304, size 10, was used; with a dimension each of 50 cm in length and 50 cm in diameter in each cylindrical section (2) joined by flanges (4) of laser cutting union, also made of stainless steel type 304 of 1.0 x .25 inches to form a total length of the body of the 150 cm chamber, with a capacity of 260 liters of ballistic gel and between each two sections a package (5) was placed to prevent leakage.

As a support for the projectile recovery chamber (Figure 13), an industrial truck (19) manufactured with steel plate with four wheels (21) of industrial type for heavy load is used, where the projectile recovery chamber is mounted (1).

For the recovery of the witness bullets, a hydraulic pump or auto suction pump (6) with 2.0 HP motor, basket type filter (7) and a control board (3) was installed, where the motor of the self suction pump (6) It has speed variation and 220 volts power supply.

The camera's shock absorber system consists of three linear guides that are three slots (16a, 16b) and (17) on a metal platform (15) to slide the projectile recovery chamber (1) and a pneumatic shock absorber ( 18) with capacity for 750 Kg, same that at one end is fixed to the metal platform (15) and at the other end is coupled to the rear support (14) of the projectile recovery chamber that moves through the linear slots (16a, 16b) and (17).

The lifting mechanism (20) of the chamber consists of a tensioner with a worm for height adjustment.

The centering device (34) or gun guide of the firearm consists of a large magnetic field created by magnets (36) applied to a support piece in the form of a "V" that has a presence or interruption sensor (no shown) of signal such that when the weapon is placed it activates a signal that allows the self-aspirating pump (6) to be turned on.

The chamber has an ozonator (not shown) to eliminate bacteria accumulated in the gel and thus maintain its consistency.

Once the projectile recovery chamber (1) is assembled, it is loaded with approximately 260 liters of reopéctico gel, adjusting the height of the front end of the projectile recovery chamber (1) where is located the basket for catches capture ( 12) at the height of the shooter or the person who operates the weapon by means of the lifting mechanism (20). When the shooter or the person firing the weapon supports the weapon in the rectangular hole (35), the sensors detect the weapon and automatically turn on the self-suction pump (6) that begins to remove gel from the projectile recovery chamber ( 1) through the suction hole (27) and returns it through the return orifice (26) to the projectile recovery chamber (1). At these times, the agitation produced by the pump causes the increase in the viscosity of the gel; at the same time, the weapon is attracted by the magnets (36) of the centering device (34) and is in the proper position to carry out the tripping, the sensors turn on an alarm to warn that the test has been started. All the sensors are controlled by a PLC type system (programmable logic controller) which is located on a control board (3).

Once the shot is made, the bullet is stopped in its path by the reopéctico gel and falls by gravity towards the lowest point of the camera projectile recovery (1), where it is sucked together with the gel by the self-suction pump (6). The sucked gel passes through a basket type filter (7) where the bale is trapped and separated from the gel that is returned to the projectile recovery chamber (1), in this way, repeated shots can be made to capture the bullets .

The safety of the shooter or the person who fires the gun is protected by a basket for catching wire ferrules (12) that holds the bullet casings of the bullets fired.

The shock absorber system of the camera absorbs the displacement, inertial caused by the energy of the projectiles fired. Once the shot has been taken, the camera moves backwards on the metallic platform (15), so that the pneumatic shock absorber (18) absorbs the energy of the shot and returns the projectile recovery chamber (1) to its initial position.

Once the tests are completed, a bullet fired by a firearm can be recovered in an average time of 1.5 seconds.

The main components of the present invention are listed below: 1. projectile recovery chamber 2. Cylindrical sections 3. Control panel 4. Flanges 5. Packaging 6. Auto suction pump 7. Basket type filter 8. Suction pipe 9. Return pipe 10. Back cover of the camera 11. Front cover of the camera 12. Basket (to capture crests) 13. Previous support 14. Back support 15. Metallic platform 16. Subsequent slots (a, b) 17. Central slot 18. Pneumatic shock absorber 19. Industrial trolley 20. Lifting mechanism 21. Wheel 22. Rear bearings 23. Front bearings 24. Steel bar 25. Lower jacks 26. Return hole 27. Suction hole 28. Vertical projection (of the back cover) 29. Horizontal surface (of the back cover) 30. Front plate (of the front cover) 31. Back plate (of the front cover) 32. Steel ring 33. Circular hole (from the back plate of the front cover) 34. Centering device 35. Rectangular hole 36. Magnets Having described extensively the invention claim of my property the content of the following claim clauses:

Claims

1 . A projectile recovery chamber where the chamber consists of a modular cylindrical body, a projectile recovery system, a height adjustment mechanism that maintains the anterior end at a higher elevation than the posterior end, a fluid recirculation system, and wherein the chamber contains means to stop and recover projectiles; characterized in that the means to stop and recover the projectiles is a non-Newtonian fluid with reopéctica properties. 2. A projectile recovery chamber as claimed in clause 1, where the fluid is a gel with reopécticas properties where its viscosity increases in relation to the shear applied. 3. A projectile recovery chamber like the one claimed in clause 1, or 2, where the projectile recovery chamber has a damping system that absorbs the energy of the shot and allows the camera to move on a metal platform and return to its initial position. 4. A projectile recovery chamber like the one claimed in clause 3 where the chamber has a pumping system that extracts the fluid and returns it to the chamber, causing a high shear stress in the fluid. 5. A projectile recovery chamber like the one claimed in clause 4, where before the bomb there is a basket-type filter to catch the projectiles fired. 6. A projectile recovery chamber to stop and capture projectiles fired by a firearm where the chamber consists of a modular cylindrical body, a means for retaining projectiles fired, a projectile recovery system, means for adjusting the height of the cylindrical body in its extreme above, a control panel, a weapon positioning system, a basket for catching the caps of the projectiles fired, means for moving the camera, characterized in that the means for retaining the projectiles fired is a gel with reopécticas properties and because the camera has a pump that has a basket type filter coupled to a hydraulic system that extracts the fluid from the chamber and returns it causing a high constant effort. 7. A projectile recovery chamber like the one claimed in clause 6, where the projectile recovery chamber has a damping system that absorbs the energy of the shot and allows the camera to move on a metal platform and return to your initial position 8. A projectile recovery chamber like the one claimed in clause 6, or 7, where the weapon positioning system is a magnetic "V" centered on which the barrel of the gun to be fired is placed. 9. A projectile recovery chamber as claimed in one of clauses 6, 7, or 8, where the shot projectile is sucked together with the reopéctic gel from the bottom of the chamber by the self-suction and trapped pump in the basket type filter where it can be easily removed. 10. A projectile recovery chamber as claimed in clause 6, where the weapon positioning system has a position sensor that activates the pump when the weapon is placed on the weapon's positioning system and stops the operation of the weapon. the bomb when the weapon is removed. 1 1. A projectile recovery chamber as claimed in any of clauses 1, 6, or 10, where the camera has a sensor that activates an alarm to indicate that the test is started

2. A projectile recovery chamber like the one claimed in the previous clause, where the pump, the presence sensor and the alarm are connected to a PLC that controls the operation of the camera.