EP3569972A1 - Agencement de cartouche pour augmenter la vitesse initiale de pistolets - Google Patents

Agencement de cartouche pour augmenter la vitesse initiale de pistolets Download PDF

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Publication number
EP3569972A1
EP3569972A1 EP18172131.7A EP18172131A EP3569972A1 EP 3569972 A1 EP3569972 A1 EP 3569972A1 EP 18172131 A EP18172131 A EP 18172131A EP 3569972 A1 EP3569972 A1 EP 3569972A1
Authority
EP
European Patent Office
Prior art keywords
projectile
section
casing
cartridge
holding
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Withdrawn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
EP18172131.7A
Other languages
German (de)
English (en)
Inventor
John D. Taylor
Dennis Omanoff
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.)
Next Generation Tactical LLC
Original Assignee
Next Generation Tactical LLC
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
Application filed by Next Generation Tactical LLC filed Critical Next Generation Tactical LLC
Priority to EP18172131.7A priority Critical patent/EP3569972A1/fr
Publication of EP3569972A1 publication Critical patent/EP3569972A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/067—Mounting or locking missiles in cartridge cases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/005—Crimping cartridge cases on projectiles

Definitions

  • the present invention relates to a cartridge arrangement for an increased muzzle velocity of guns.
  • the cartridge, the chamber holding the cartridge and the barrel are all at rest or ambient pressure.
  • the primer is struck by the firing pin and is thereby ignited, a slight over-pressure is created in the cartridge case's primer pocket, which is called primary ignition.
  • the burning primer granules ignite the powder in the cartridge case, which leads to a further increase in cartridge case pressure and consequently to an increase in chamber pressure. This is called secondary ignition.
  • the cartridge case flattens against the chamber wall leading to a swelling event against the chamber wall sealing gases from exiting rearward.
  • the burning powder acts as a pressure generator. As long as the chamber volume is constant, the pressure goes up at a fixed rate depending on the burn rate of the burning powder.
  • An object of the present invention is to supply an improved cartridge arrangement to at least partially overcome the above-mentioned drawbacks.
  • a cartridge arrangement for guns which comprises a casing holding a propellant and a projectile in a projectile holding position, wherein the casing comprises a holding section interacting with a contact section of the projectile and the holding section forms a releasable lock, specifically a positive lock and/or a material bond with the projectile.
  • the cartridge arrangement can be realized in a way that the initial resistance against propulsion is great enough to hold the projectile in the projectile holding position within the casing until an optimal chamber pressure is reached, upon which the initial resistance against propulsion is overcome by a chamber pressure force acting on the projectile and forcing it into the barrel. This results in a higher muzzle velocity.
  • the cartridge arrangement usually comprises a primer to ignite the propellant upon firing of the gun
  • the increased resistance against propulsion can consequently also prevent the projectile from being pushed into the barrel only by the chamber pressure created by the primer, since this could have a negative effect on the muzzle velocity of the projectile.
  • the solution according to the present invention contributes to eliminate any remaining pressure difference between the chamber pressure and the ambient pressure immediately after the projectile fully leaves the muzzle of the gun. Furthermore, this can be achieved according to the present invention by dimensioning the initial resistance against propulsion for specific gun types and calibers among other things.
  • the present invention provides a cartridge arrangement, wherein the contact section of the projectile comprises an indentation section of a projectile surface area.
  • This indentation can be formed after the projectile has been put in the projectile holding position and it can comprise spot indentations and/or circumferential indentations (either complete and/or sectional).
  • the present invention provides a cartridge arrangement, wherein the holding section of the casing comprises a crimp section, which extends into an inner area of the contact section of the projectile resulting in the initial resistance against propulsion.
  • the crimp section can be formed with the projectile in the projectile holding position so that the crimped area of the casing reaches inside the indentations of the projectile, thus forming a positive lock.
  • the corresponding indentations(s) to the crimp section(s) can also be formed by the crimping process.
  • the present invention provides a cartridge arrangement, wherein the indentation section of the projectile surface area comprises a groove along a circumference of the projectile surface area providing the inner area of the contact section to receive the crimp section of the casing.
  • holding grooves spaced apart in a longitudinal direction.
  • Such holding grooves can also be combined with several crimp sections.
  • Several holding grooves may also serve to provide improved sealing properties, which keep the propulsion gas in the casing for a longer time.
  • the present invention provides a cartridge arrangement, wherein the indentation section and the crimp section form the releasable positive lock and are dimensioned in a way that the initial resistance against propulsion resulting from the releasable positive lock is equal to such a resistance that allows for an improved firing chamber pressure.
  • the present invention provides a cartridge arrangement, wherein the material bond comprises a soldering joint and/or a weld joint between the projectile and the casing.
  • the soldering joint can be realized by inserting soldering material between the projectile and the casing into a soldering contact area.
  • the soldering contact area can be configured and defined be a circumferential joint element of the casing reaching towards the inside of the casing and thereby forming a stopping element for the soldering material between the casing and the projectile.
  • a precise soldering joint can thereby be attained, which can result in the same (consistent and adjustable) initial resistance against propulsion that leads to the optimal muzzle velocity as in the case of the positive lock between the projectile and casing.
  • a weld joint can be realized either by weld spots and/or by a circumferential weld between an open front end section of the casing and the projectile in the projectile holding position.
  • the weld joint can also be dimensioned in a way that an initial resistance against propulsion is provided, which results in the optimal muzzle velocity.
  • the present invention provides a cartridge arrangement, wherein the material bond comprises a soldering joint and/or a weld joint between the projectile and the casing.
  • the soldering joint can be realized by inserting soldering material between the projectile and the casing into a soldering contact area.
  • the soldering contact area can be configured and defined be a circumferential joint element of the casing reaching towards the inside of the casing and thereby.
  • a positive lock and a material bond with the projectile can be combined.
  • E.G. one or more crimp sections can be combined with one or more welding and/or soldering sections.
  • the invention provides a process for the production of a gun cartridge comprising a casing with an open front end section and a closed rear end section, a propellant, and a projectile, wherein the propellant is placed within the casing through the front end section towards the rear end section and the projectile is placed within or partly within the casing in a projectile holding position at the open front end section and a positive lock between the cartridge and the projectile is formed through crimping an outer surface area of the cartridge/casing with the projectile in the cartridge holding position, thereby also crimping (forming) an outer surface area of the projectile.
  • FIG. 1 shows a diagram of the chamber pressure p over time t within the chamber of a gun with a cartridge arrangement according to the present invention.
  • the dashed-dotted line 1 shows a chamber pressure buildup according to the present invention, while the solid line 2 depicts a chamber pressure buildup in traditional firearms, where the present invention is not implemented.
  • the dashed line 3 visualizes the initial increase in chamber pressure in traditional firearms (without implementation of the present invention) due to the firing of the primer and the discontinuous ignition of the burning powder.
  • the dotted line 4 shows the respective initial increase in chamber pressure for cartridge arrangement according to the present invention.
  • the dashed line 3 of a traditional cartridge arrangement and the dotted line 4 of firearms with the present invention implemented start to differ as soon as the chamber pressure is equal to a projectile release pressure 5, which forces the projectile out of its projectile holding position and into the barrel in traditional firearms, yielding a gradual increase in chamber volume resulting in a slower rate of chamber pressure buildup for traditional firearms.
  • the chamber pressure increases faster and the projectile's exit out of the projectile holding position is impeded until the optimal projectile release chamber pressure 6 is reached.
  • the sudden increase in chamber volume results in a bend of the dashed-dotted line 1. Because the projectile is released from its projectile holding position at a higher chamber pressure compared to traditional firearms, the projectile has a higher and therefore better muzzle velocity.
  • the impeded release of the projectile out of the projectile holding position according to the present invention results in a faster pressure buildup of the burning powder. This has the effect that more of the available burning powder is burned and converted into kinetic energy of the projectile while the projectile is within the barrel, minimizing and/or eliminating any pressure differences between the chamber and the ambience.
  • Traditional firearms without the present invention exhibit a pressure differential 7 between the chamber pressure and ambient pressure after the projectile fully exits the muzzle. This results in losses of potential energy, which cannot be transformed into kinetic energy of the projectile.
  • Fig. 2a shows a cartridge arrangement 9 according to a first embodiment of the present invention.
  • the projectile 10 is shown here in its projectile holding position within the casing 11.
  • the contact section of the projectile 10 is formed as a groove 12 and the holding section of the casing 11 is a circumferential crimp 13.
  • the crimp 13 reaches inside the groove 12, and the groove 12 is therefore not directly visible in the figure (indicated by the arrow).
  • Fig. 2b is a close-up view of Fig. 2a and shows the circumferential crimp 13 in more detail.
  • Fig. 3a shows the cross-section A-A of Fig. 2a .
  • the cross-section of the projectile 10 shown here lies within the groove 12 of the projectile 10, which is covered by the circumferentially crimped casing 11.
  • Fig. 3b shows the cross-section E-E of Fig. 2b .
  • the projectile 10 is visible with its groove being covered by the casing 11 and its circumferential crimp 13.
  • Fig. 4a and Fig. 4b show a second embodiment according to the present invention.
  • the projectile's 10 contact section is formed as two spot indentations 14 and the casing's 11 holding section is formed as two spot crimps 15 that reach inside the two spot indentations 14.
  • another embodiment of the present invention could incorporate any number and/or forms of indentations and/or crimps.
  • Fig. 5a shows the cross-section B-B of Fig. 4a .
  • the cross-section of the projectile 10 lies within the plane of the two spot indentations 14, where the two spot crimps 15 of the casing 11 reach inside.
  • Fig. 5b shows the cross-section F-F of Fig. 4b .
  • the cross-section of the projectile 10 is again chosen to lie within the plane of the two spot indentations 14. Again visible here is the casing 11 with its spot crimps 15.
  • Fig. 6 shows a third embodiment of the present invention, which is visualized here as a cross section.
  • the projectile's 10 contact section is formed as a groove 12 around its circumference and the holding section of the casing 11 is formed by flanging the front end section 16 of the casing 11 so that the flanged section 17 of the casing 11 reaches inside the groove 12
  • the contact section of the projectile could also be formed as spot indentations and the holding section of the casing could be formed as spot flanges that reach inside the spot indentations.
  • the first, second and third embodiments can also be realized together in any combination (first, second, and third embodiment; first and second embodiment; first and third embodiment; and second and third embodiment).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP18172131.7A 2018-05-14 2018-05-14 Agencement de cartouche pour augmenter la vitesse initiale de pistolets Withdrawn EP3569972A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18172131.7A EP3569972A1 (fr) 2018-05-14 2018-05-14 Agencement de cartouche pour augmenter la vitesse initiale de pistolets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18172131.7A EP3569972A1 (fr) 2018-05-14 2018-05-14 Agencement de cartouche pour augmenter la vitesse initiale de pistolets

Publications (1)

Publication Number Publication Date
EP3569972A1 true EP3569972A1 (fr) 2019-11-20

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EP18172131.7A Withdrawn EP3569972A1 (fr) 2018-05-14 2018-05-14 Agencement de cartouche pour augmenter la vitesse initiale de pistolets

Country Status (1)

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EP (1) EP3569972A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR419869A (fr) * 1910-08-30 1911-01-17 Nicolas Tufectchieff Perfectionnements aux armes à feu
US3713386A (en) * 1970-06-22 1973-01-30 Colt Ind Operating Corp Range limited projectile system
US20170089672A1 (en) * 2015-09-24 2017-03-30 True Velocity, Inc. Ammunition having a projectile made by metal injection molding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR419869A (fr) * 1910-08-30 1911-01-17 Nicolas Tufectchieff Perfectionnements aux armes à feu
US3713386A (en) * 1970-06-22 1973-01-30 Colt Ind Operating Corp Range limited projectile system
US20170089672A1 (en) * 2015-09-24 2017-03-30 True Velocity, Inc. Ammunition having a projectile made by metal injection molding

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