EP0405616A2 - Geschossfangvorrichtung mit einem Rücklauf- und Wiedergewinnungssystem für das geschossbremsende Material - Google Patents

Geschossfangvorrichtung mit einem Rücklauf- und Wiedergewinnungssystem für das geschossbremsende Material Download PDF

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Publication number
EP0405616A2
EP0405616A2 EP90114579A EP90114579A EP0405616A2 EP 0405616 A2 EP0405616 A2 EP 0405616A2 EP 90114579 A EP90114579 A EP 90114579A EP 90114579 A EP90114579 A EP 90114579A EP 0405616 A2 EP0405616 A2 EP 0405616A2
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EP
European Patent Office
Prior art keywords
granular material
heap
projectile
vibrating
conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90114579A
Other languages
English (en)
French (fr)
Other versions
EP0405616A3 (en
Inventor
Andrea C/O Impresa Costruzioni Simonetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Impresa Costruzioni Soc Fra a r l SA
Original Assignee
Impresa Costruzioni Soc Fra a r l SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from IT48308/84A external-priority patent/IT1178386B/it
Priority claimed from IT47522/85A external-priority patent/IT1181837B/it
Application filed by Impresa Costruzioni Soc Fra a r l SA filed Critical Impresa Costruzioni Soc Fra a r l SA
Priority to EP19900114579 priority Critical patent/EP0405616A3/en
Publication of EP0405616A2 publication Critical patent/EP0405616A2/de
Publication of EP0405616A3 publication Critical patent/EP0405616A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J13/00—Bullet catchers

Definitions

  • the present invention relates to a ballistic projectile-ar­rester having a regeneration and/or recovery system for the impact material, said projectile-arrester being suitable for firing with small arms or with arms of other kinds, in particular in indoors firing grounds or shooting-galleries.
  • the pre­sent invention relates to a ballistic projectile-arrester for small arms that are capable of shooting high kinetic energy projectiles, said projectile-arrester comprising, as a slowing down structure, a granular material system which is preferably fireproof and allows a soft impact with the projectile and the dissipation of said kinetic energy in a fully safe way, as well as a system that allows the gra­nular material to be recovered and the fired projectiles to be elimi­nated.
  • Some types of projectile-arresters already known at the present time consist essentially of a metal impact surfaces which convey. with no possibility of return of the projectiles thanks to their suitable geometric shapes, the projectiles and the respective freg­ ments towards a deceleration or kinetic energy dissipation chamber, where they are finally collected. With such a kind of arrangement, the projectile impact onto the metal causes a large production of fragments, dusts and lead vapors.
  • the projectile-arresters of the metallic type do not present the unsolvable problem of the rebound, they present, at least at a certain distance, some features of lack of safety for the personnel.
  • a further type of projectile-arrester employed at the present time is that of the non metallic type (i.e., that employing wooden crosspieces, pneumatic tires, sand, etc.), which types present a series of drawbacks that caused the same to be abandoned.
  • projectile-arresters are poorly reliable for the personnel and in addition they become easily saturated with lead and fragments or debris; moreover, they are inconvenient in their maintenance because of the frequent and costly interventions as well as of the periodic substitution of the whole impact structure, be such structure made up of crosspieces, pneumatic tires, rubber slabs etc., or of any other material in traditional use.
  • sand embankments give rise, in addition to lead saturation, also to a persisting dust cloud consisting or si­liceous dusts that obscure the end part of the shooting-gallery.
  • Earth banks are suitable for outdoor firing grounds only, which because of various reasons, are progressively giving way to the indoor grounds.
  • Main object of the present invention is that of providing a ballis­tic-projectile arrester solving drawbacks set before and realizing a re­generation system that allow to obtain a better separation of granular material from projectiles, by means of supporting and conveyor means that are so designed to allow a better and more regular conveying of the mix­ture of granular material and projectiles.
  • a ballistic projectile arrester is obtained that allows to have a projec­tile absorption structure taking up as little space as possible and, at the same time, capable of absorbing a large quantity of projectiles without becoming saturated, maintaining the impact material circulating at a constant rate.
  • a further object of the present invention is that of supplying a regeneration system which is advantageously realized with a closed air cycle so that the need is avoided of restoring air and of provi­ding interchanges and contacts with the air of the firing ground itself.
  • a ballistic projectile-arrester suitable for fires with small as well as with other types of arms comprising a projectile impact structure consisting of a granular ma­terial in the form of a heap and, a regeneration and/or recovery sys­tem for said granular material, with the respective separation of the projectiles, said regeneration and/or recovery system comprising vibrating means as well as conveyor means so as to cause said material to move and to be con­veyed, and means for recovering the material, delivery mechanical means which convey said granular material together with the fired projec­tiles towards separating means in which said projectiles are collected, and feeding conduit means for conveying the granular material back to the feeding chamber characterized in that air pre-fil­tering means are provided downstream said conveyor conduit means for intercepting granules still suspended in the air stream, as well as first conduit means making filtered air and powder fines to flow towards filtering
  • Said granular material regeneration system can also be associated to other similar units, according to the particular structural needs of the firing ground in which the ballistic projectile-arrester is pro­vided according to this invention, said units being in a suitable num­ber as regards the length of the granular material heap in the transver­se direction.
  • said vibrating and conveyor means are formed by sloping walls located under the heap of the material, some electrovibrating means suitably spaced apart from one another being provided on said walls.
  • said vibrating and conveyor means are made up of a steel plate provided below the heap of the granular material, at a slope about the same as that of the exposed edge of said heap, some vibrating means being provided under said plate which cause the material to move towards a passage provided below the same.
  • the target for the firing practice is pointed out by 3, whereas the zone 4 enclosed within dotted lines points out the zone where the 90% of the projectiles trajectories is reasonably likely to occur.
  • the heap 5 of the slowing down material is kept on its rear side by a ballistic steel plate 6 , whereas it is collected and supported on the bottom side by the sloping walls 7 which are lined with steel plates. On the rear wall 7 the electrical vibrating means 8 are applied.
  • a safety grate 9 made up of ballistic steel is provided at a posi­tion above said walls 7.
  • a passage 10 is shown at the bottom of the channel formed by said walls 7., which passage runs in the transverse direction with respect to the shooting-gallery (see also Figure 2), the take-up openings 11 being arranged along said passage; four such openings are provided in Figure 2, which are connected, through a pipe 12, to a delivery pump 13.
  • a pipe 14 departs from said pump 13 , said pipe serving the purpose of conveying the granular material mixed with the projectiles into the separator 15 that collects such projectiles which, in their turn, are next taken out by means of a carriage 16.
  • the conduit 17 departs from the separating unit 15 , such conduit conveying the granular material into the feeding chamber 18 .
  • a pre-­filter 19 intercepts the granules possibly present as suspended matter because of the turbulence, allowing the dusts only to pass that are carried by the conveying fluid.
  • Conduit 20 takes the conveying fluid and the fines to a filter 21, said dusts being settled onto the bottom of the same.
  • the filtered air passes from chamber 22 to the pipe 23 through which it reaches the pas­sage 10.
  • the air is taken up again, saturated with granules, at that point through the suitable openings and then put again in the circu­lation.
  • Number 24 points out the collection carriage for the powders of the granular material.
  • FIG 3 illustrates finally a further vibrating system which pro­vides a steel plate 25, in an almost parallel position with respect to the exposed surface 26 of the heap 5 , the vibrating means 27 being provided below said plate for conveying the granular material towards the passage 28.
  • the projectile once fired, reaches the target 3 in about 1/10 sec., then it reaches the surface 7 of the deceleration mass consisting of the granular material in which it loses its kinetic energy by friction with the granules, so as to be decelerated till it stops at a distance from the exposed surface 7 that excludes the possibility of any rebound.
  • Material to be tested 20 foam rubber in the form of bags of heavy polyethylene Arm: lightweight automatic rifle "F.A.L.”, 7.62 gauge NATO, with SMI 9.30 g projectile Firing distance: 40 m
  • Direction of the projectiles at right angles to the material to be tested
  • Position of the shooter on the ground in yard
  • Results the first 5-6 projectiles were stopped after going through a thickness of about 1.30-1.50 m of the material with no appreciable deformation.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP19900114579 1984-06-01 1985-05-31 Ballistic projectile-arrester having a regeneration and recovery system for the projectile braking material Withdrawn EP0405616A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19900114579 EP0405616A3 (en) 1984-06-01 1985-05-31 Ballistic projectile-arrester having a regeneration and recovery system for the projectile braking material

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
IT4830884 1984-06-01
IT48308/84A IT1178386B (it) 1984-06-01 1984-06-01 Fermapalle balistico, a struttura ad autorigenerazione, idoneo ai tiri con armi portatili e non, in particolare in poligoni in galleria
IT4752285 1985-01-04
IT47522/85A IT1181837B (it) 1985-01-04 1985-01-04 Fermapalle balistico con sistema di rigenerazione e/o reimpiego del materiale di impatto
EP19900114579 EP0405616A3 (en) 1984-06-01 1985-05-31 Ballistic projectile-arrester having a regeneration and recovery system for the projectile braking material

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP85902630.4 Division 1985-05-31

Publications (2)

Publication Number Publication Date
EP0405616A2 true EP0405616A2 (de) 1991-01-02
EP0405616A3 EP0405616A3 (en) 1991-01-30

Family

ID=27233320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900114579 Withdrawn EP0405616A3 (en) 1984-06-01 1985-05-31 Ballistic projectile-arrester having a regeneration and recovery system for the projectile braking material

Country Status (1)

Country Link
EP (1) EP0405616A3 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411025A (en) 1944-02-09 1946-11-12 Texas Co Solvent extraction of unsaturated hydrocarbon mixtures

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411026A (en) * 1944-02-21 1946-11-12 Douglas Aircraft Co Inc Firing range butt
FR1376898A (fr) * 1963-11-20 1964-10-31 Dispositif extracteur de pulvérulent tel que farine, ainsi que les ensembles de stockage et notamment les silos pourvus de ce dispositif

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411025A (en) 1944-02-09 1946-11-12 Texas Co Solvent extraction of unsaturated hydrocarbon mixtures

Also Published As

Publication number Publication date
EP0405616A3 (en) 1991-01-30

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