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EP1962048A2 - Cartouche d'énergie réduite améliorée et son procédé de fabrication - Google Patents

Cartouche d'énergie réduite améliorée et son procédé de fabrication Download PDF

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Publication number
EP1962048A2
EP1962048A2 EP08002544A EP08002544A EP1962048A2 EP 1962048 A2 EP1962048 A2 EP 1962048A2 EP 08002544 A EP08002544 A EP 08002544A EP 08002544 A EP08002544 A EP 08002544A EP 1962048 A2 EP1962048 A2 EP 1962048A2
Authority
EP
European Patent Office
Prior art keywords
piston
cartridge body
cavity
primer
cartridge
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.)
Granted
Application number
EP08002544A
Other languages
German (de)
English (en)
Other versions
EP1962048A3 (fr
EP1962048B1 (fr
Inventor
Rochelle Diane Poore
Drew Lee Goodlin
Lawrence Peter Head
Richard Dean Hunt
Joel Lee Sandstrom
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.)
Northrop Grumman Innovation Systems LLC
Original Assignee
Alliant Techsystems Inc
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 Alliant Techsystems Inc filed Critical Alliant Techsystems Inc
Publication of EP1962048A2 publication Critical patent/EP1962048A2/fr
Publication of EP1962048A3 publication Critical patent/EP1962048A3/fr
Application granted granted Critical
Publication of EP1962048B1 publication Critical patent/EP1962048B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B8/00—Practice or training ammunition
    • F42B8/02—Cartridges
    • 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
    • F42B5/045—Cartridges, i.e. cases with charge and missile of telescopic type

Definitions

  • the invention relates to cartridges for firearms that are designed for, or are temporarily or permanently modified to be used in, reality-based training exercises.
  • the invention relates to a two-piece reduced energy cartridge.
  • One design used to solve the cycling problem in training cartridges is that of telescopically interfitted two-piece cartridges. After the explosive material is ignited in such a two-piece cartridge, the low-mass projectile, located in a first part of the cartridge, is expelled from the firearm by a portion of the gas created upon ignition. The remaining gas created during ignition of the explosive material is used to drive a second part of the cartridge rearwardly to cycle the firearm.
  • One objective in designing such a training cartridge is the minimization of cost.
  • Another objective is minimization of explosive material in the cartridge. The quantity of explosive material must be sufficient to cycle the firearm, but also low enough to prevent the projectile from leaving the firearm at an unsafe velocity.
  • At least one embodiment of the present invention is directed toward a method of manufacturing a cartridge for use in a firearm.
  • the method comprises providing a cartridge body wherein a first portion of the cartridge body defines a forward cavity and a second portion of the cartridge body defines a rearward cavity. An aperture interconnects the forward and rearward cavities.
  • the cartridge body is configured to be disposed about at least a portion of a piston.
  • the method further comprises providing a piston wherein the piston has a top end and a bottom end. A portion of the bottom end defines a primer retaining cavity.
  • a portion of the piston defines a gas passageway extending from the primer retaining cavity to the top end of the piston.
  • the method further comprises inserting a primer into the primer retaining cavity of the piston and securing the primer in the primer retaining cavity.
  • the method further comprises placing a seal member around the piston, inserting the piston and seal member combination into the rearward cavity of the cartridge body, and crimping at least a portion of the second portion of the cartridge body to
  • At least one embodiment of the present invention is directed towards a cartridge for firearms.
  • the cartridge includes a piston, a cartridge body, a primer, and a seal member.
  • the piston has a top end and a bottom end. A portion of the bottom end of the piston defines a primer retaining cavity. And, a portion of the piston defines a gas passageway which extends from the primer retaining cavity to the top end of the piston.
  • a first portion of the cartridge body defines a forward cavity and a second portion of the cartridge body defines a rearward cavity.
  • An aperture interconnects the forward and rearward cavities.
  • the cartridge body is configured to be disposed about at least a portion of the piston. At least a portion of the second portion of the cartridge body is crimped about the piston.
  • a seal member is arranged around the piston, forming a seal between the piston and an inner surface of the rearward cavity of the cartridge body.
  • the piston has two positions: an unfired position and a fired position. In the unfired position the top end of the piston is adjacent the aperture. In the fired position the piston has sealingly slid rearward in the rearward cavity.
  • a primer is arranged in the primer retaining cavity of the piston whereby upon firing, the gas created by the primer flows through the gas passageway. A portion of the gas flows through the aperture, and a portion of the gas fills the rearward cavity between the seal and the aperture, which causes the piston to sealingly slide rearward.
  • FIG. 1 is an exploded view of an embodiment of the present invention depicting the components of a cartridge.
  • FIG. 2 is cross-sectional view of an embodiment of the present invention depicting a cartridge in an unfired position.
  • FIG. 3 is a cross-sectional view of an embodiment of the present invention depicting a cartridge in a fired position.
  • FIG. 4 is a perspective cross-sectional view of an embodiment of the present invention depicting a cartridge body with a vent hole.
  • FIG. 5 is a perspective cross-sectional view of an embodiment of the present invention depicting a cartridge with a rupture disc.
  • FIG. 6 is a perspective cross-sectional view of an embodiment of the present invention depicting a cartridge with a rupture disc.
  • FIG. 7 is a perspective cross-sectional view of an embodiment of the present invention depicting a cartridge with a seal member integral to the piston.
  • FIG. 8 is a flowchart of an embodiment of the present invention depicting a method of making a cartridge.
  • Embodiments of the present invention make use of telescopically interfitted two-part cartridges.
  • the components are designed such that they can be easily produced and assembled at a lower cost than other designs.
  • At least one embodiment of the present invention is directed toward a firearm cartridge.
  • Examples of the components to be assembled into a cartridge 10 are depicted in FIG. 1 .
  • the telescopically interfitted cartridge 10 of FIG. 1 is comprised of a cartridge body 20, a piston 25, a seal member 30, and a primer 35.
  • the cartridge body 20 has five primary design features: a forward cavity 40 that retains a projectile; a rearward cavity 45 (as best seen in FIG. 3 ) into which the piston 25 is inserted; a divider 50 which separates the forward and rearward cavities; an aperture 55 within the divider 50 interconnecting the forward and rearward cavities, the aperture 55 acting to limit the gas flow to a projectile thereby limiting the projectile's velocity; and a top chamfer 60 which aids in feeding cartridges into the magazine and the firearm. It should be noted that the top chamfer 60 is not required in all embodiments of the invention.
  • the cartridge 10 also comprises a piston 25 wherein the piston has a top end 65 and a bottom end 70.
  • a portion of the bottom end 70 defines a primer retaining cavity 75 for retaining the primer, as best seen in FIGS. 2 and 3 .
  • a portion of the piston defines a gas passageway 80 extending from the primer retaining cavity 75 to the top end 65 of the piston.
  • the cartridge body 20 is configured to be disposed about at least a portion of the piston 25, thus forming a telescopically interfitted two-part cartridge 10.
  • the inner diameter 85 of the cartridge body 20 and the outer diameter 90 of the piston 25 are configured to allow the piston body 25 to be inserted into the cartridge body 20.
  • FIG. 2 which depicts the cartridge 10 in an unfired state
  • the top end 65 of the piston is adjacent the divider 50.
  • the piston 25 is almost completely contained within the rearward cavity 45 of the cartridge body 20.
  • a portion 92 of the cartridge body is crimped to the piston 25.
  • FIG. 3 which depicts the cartridge 10 in a fired state
  • crimped portion 92 impacts protrusion 93 after firing. Because the inner diameter of the crimped portion 92 is less than the outer diameter of the protrusion 94, the piston and cartridge body do not physically separate after firing. Instead, after firing the piston slides rearwardly, remaining slidingly engaged to the cartridge body in a telescopic manner.
  • the seal member 30 provides a seal between the piston 25 and cartridge body 20 so that the entire travel of the piston, from an unfired position to a fired position, is sealed. Gases created upon firing escape only through the aperture 55. More specifically, upon initiation of the primer, gas travels through the gas passageway 80 and reaches the divider 50. The gas fills the portion of the rearward cavity between the cartridge body 20, the piston 25, and the seal member 30. The seal member 30 prevents the gas from escaping rearwardly.
  • the term "primer” as used herein includes any detonating gas generator.
  • the present invention utilizes a gas generating primer that relies on heat to increase internal pressure: Gas is generated then heated. This creates an expansion of less gas to more volume than cooler systems. Information related to such a gas generating primer can be found in the pending U.S. Patent Application entitled “NON-TOXIC PERCUSSION PRIMERS AND METHODS OF PREPARING THE SAME", Attorney Docket No. A39.2B-13252-US01, the entire contents of which are incorporated herein by reference.
  • the cartridge body 20 further includes a vent hole 96, as depicted in FIG. 4 , in order to allow gases to escape and further reduce the energy available to the projectile.
  • the vent hole 96 is desirably placed forward the top end 65 of the piston when the piston is in the fired position.
  • the size of the vent hole will vary, depending on the primer/propellant system used. However, in some embodiments the size of the vent hole is approximately 0.050 inches.
  • At least one embodiment of the present invention employs the use of a rupture disc 98 to regulate internal pressures, as shown in FIGs. 5 and 6 .
  • the rupture disc 98 is placed within the rearward cavity 45 and adjacent the aperture 55.
  • Figure 6 depicts another embodiment of a rupture disc 98, with the disc 98 placed within the gas passageway 80.
  • the rupture disc 98 has a thickness of approximately 0.010 inches.
  • the seal member 30 is an O-ring, as depicted in FIGs. 1 - 3 .
  • the seal member 30 is an O-ring, as depicted in FIGs. 1 - 3 .
  • one skilled in the art will recognize that a number of other seal members may be used to accomplish the sealing effect created by the O-ring.
  • the seal member is integral to the piston 25, as shown in FIG. 7 .
  • the design of the piston 25 has eliminated the need for a separate seal member.
  • a propellant 94 is further included in the piston 25, as shown in FIG. 2 .
  • a propellant 94 is placed within the gas passageway 80 of the piston.
  • the cartridge 10 is also manufactured with a projectile 95.
  • the projectile 95 is comprised of a cup 100, a marking material 105, and a cap 110, as depicted in FIG. 1 .
  • the projectile 95 is inserted into the forward cavity 40 of the cartridge body 20. After firing, as gas escapes from the rearward cavity 45 to the forward cavity 40 through the aperture 55, the projectile 95 is forced from the forward cavity and out the barrel of the firearm.
  • the projectile 95 is comprised of a rubber bullet, a blank, or oleoresin capsicum spray.
  • a rubber bullet a blank
  • oleoresin capsicum spray a projectile that can be substituted for any of the above examples.
  • At least one embodiment of the present invention is directed toward a method of manufacturing the cartridge described above, as depicted in the flowchart in FIG. 8 .
  • the method comprises the step 200 of providing a cartridge body 20 and a piston 25, as described above.
  • the method further comprises the step 210 of priming the piston 25. This step involves inserting a primer 35 into the primer retaining cavity 75 of the piston.
  • the method further comprises the step 215 of securing the primer in the primer retaining cavity 75.
  • securing the primer to the piston involves staking the piston.
  • One method of staking the piston may entail using a machine to push inwardly portions of the piston material surrounding the primer. Once sufficient material has been pushed inwardly, the primer will be securingly retained within the primer retaining cavity.
  • the method further comprises the step 225 of placing a seal member 30 around the piston.
  • the method further comprises the step 230 of inserting the piston and seal member combination into the rearward cavity 45 of the cartridge body 20.
  • the inner diameter 85 of the cartridge body 20 and the outer diameter 90 of the piston 25 are configured to allow the piston 25 to be inserted into the cartridge body 20.
  • the method further comprises the step 235 of crimping at least a portion 92 of the cartridge body 20 to the piston 25.
  • the crimped portion 92 is located as close to the bottom end 70 of the piston as possible, thus allowing the greatest amount of travel.
  • the step 235 of crimping is performed by two partially annular jaws.
  • the cartridge is placed within jaws and as they are brought together by a predetermined force, through a predetermined distance, or some other measurement used by those skilled in the art, a portion of the cartridge body is compressed onto the piston.
  • the step 235 of crimping comprises crimping the bottom portion of the cartridge body so that the inner diameter 85 of the rearward cavity in the crimped portion is less than the inner diameter 85 of the rest of the rearward cavity 45, as seen in FIG. 2 .
  • cartridge bodies before crimping have an outer diameter of approximately 0.359 inches and after crimping have an outer diameter of approximately 0.350 inches. These dimensions will vary with other embodiments because the size of the firearm may dictate larger or small cartridges, however this ratio as proved to be sufficient to secure the cartridge body and the piston.
  • the method further includes the step 240 of inserting a projectile 95.
  • the step of inserting a projectile may comprise inserting a cup 100 into the forward cavity 40 of the cartridge body.
  • a marking material 105 such as ink or some other agent for marking known by those skilled in the art, is distributed into the cup 100.
  • amounts may vary depending on the size of the cartridge and the amount of marking material desired, an amount of material in some embodiments is 1.5 grains.
  • a cap 110 is then inserted into the cup 100 and marking material combination.
  • the step 240 of inserting the projectile 95 can be performed at various stages of manufacture.
  • the step of inserting the projectile is performed prior to the step 230 of inserting the piston and seal member combination into the cartridge body.
  • the vent 125 may prevent the projectile from becoming dislodged from the forward cavity 40 during the step of piston insertion into the cartridge body.
  • the method also comprises the step 250 of inspecting the piston for damage.
  • the inspection step 250 is performed immediately after the step 215 of securing the primer in the primer retaining cavity. The inspection step 250 ensures that the primer has not been damaged during securement. Additionally, the inspection step 250 ensures that the primer has been fully secured to the piston.
  • a first machine performs the steps of primer insertion, primer securement, and piston inspection.
  • a second machine performs the steps of placing the seal member, inserting the piston and seal member combination into the cartridge body, and crimping the cartridge body.
  • the primer and piston combination may be placed into a feeder bowl of the second machine.
  • the second machine may stretch a seal member, drawn from another feeder bowl, and place it over a piston.
  • the second machine may draw a cartridge body from a feeder bowl, draw a cup from another feeder bowl, and insert the cup into the forward cavity of the previously drawn cartridge body.
  • a marking material is then distributed into the cup by the second machine, and a cap is drawn from a feeder bowl and inserted into the cup and marking material combination.
  • the second machine then inverts the cartridge and projectile combination. At this point, the second machine may then insert the piston into the cartridge body and the second machine crimps the cartridge body to the piston, after which the cartridge is placed in a tray as a finished unit.
  • the components, in particular the cartridge body and the piston, are designed such that they can be easily produced and assembled.
  • At least one embodiment of the present invention eliminates complicated piston and cartridge body alignment requirements.
  • at least one embodiment of the present invention uses less primer than that required by other designs, thereby reducing or eliminating damage to the gun's bolt face while still having enough energy to cycle the firearm.
  • any dependent claim which follows should be taken as alternatively written in a multiple dependent form from all prior claims which possess all antecedents referenced in such dependent claim if such multiple dependent format is an accepted format within the jurisdiction (e.g. each claim depending directly from claim 1 should be alternatively taken as depending from all previous claims).
  • each claim depending directly from claim 1 should be alternatively taken as depending from all previous claims.
  • the following dependent claims should each be also taken as alternatively written in each singly dependent claim format which creates a dependency from a prior antecedent-possessing claim other than the specific claim listed in such dependent claim below.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP08002544.8A 2007-02-22 2008-02-12 Cartouche d'énergie réduite améliorée et son procédé de fabrication Active EP1962048B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/677,638 US20100269724A1 (en) 2007-02-22 2007-02-22 Reduced Energy Cartridge and Method of Making Same

Publications (3)

Publication Number Publication Date
EP1962048A2 true EP1962048A2 (fr) 2008-08-27
EP1962048A3 EP1962048A3 (fr) 2010-02-24
EP1962048B1 EP1962048B1 (fr) 2013-12-11

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Application Number Title Priority Date Filing Date
EP08002544.8A Active EP1962048B1 (fr) 2007-02-22 2008-02-12 Cartouche d'énergie réduite améliorée et son procédé de fabrication

Country Status (3)

Country Link
US (1) US20100269724A1 (fr)
EP (1) EP1962048B1 (fr)
CA (1) CA2621708C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011130550A2 (fr) 2010-04-14 2011-10-20 Alliant Techsystems Inc. Munition de marquage
EP2668463A1 (fr) * 2011-01-27 2013-12-04 General Dynamics Ordnance and Tactical Systems - Canada Inc. Cartouche d'entraînement à énergie réduite à structure de réduction de vitesse
US9835426B2 (en) 2012-01-16 2017-12-05 Vista Outdoor Operations Llc Spin-stabilized non-lethal projectile with a shear-thinning fluid
RU203194U1 (ru) * 2020-11-27 2021-03-25 Общество с ограниченной ответственностью «АРСЕНАЛ» Патрон для стрельбы из действующих моделей огнестрельного оружия
US20220146238A1 (en) * 2020-11-12 2022-05-12 General Dynamics OTS - Canada, Inc. Reduced-energy cartridge with exterior sealing member for fluted chamber

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7225741B2 (en) * 2004-01-22 2007-06-05 Pdt Tech, Llc Reduced energy training cartridge for self-loading firearms
US20120180686A1 (en) * 2007-07-20 2012-07-19 Jones Kenneth R Frangible Projectile, And Weapon Cartridge Containing Same
US8365669B1 (en) * 2011-08-24 2013-02-05 Utm Ip Limited Training cartridge
EP2813796A4 (fr) * 2012-02-07 2015-10-21 Nikolay Nikolaevich Kireev Cartouche spéciale (et variantes)
HK1161810A2 (en) * 2012-03-01 2012-08-03 Compressed gas pellets
US9534877B2 (en) 2013-01-14 2017-01-03 Pdt Tech, Llc Low energy mechanical operating cartridge
WO2014144104A2 (fr) 2013-03-15 2014-09-18 Alliant Techsystems Inc. Cartouche subsonique et fusil à gaz combinés
US9360223B1 (en) 2013-03-15 2016-06-07 Vista Outdoor Operations Llc High velocity ignition system for ammunition
IL273019B2 (en) * 2016-03-25 2023-09-01 Vista Outdoor Operations Llc energy reduced msr kit
US11118851B2 (en) 2016-03-25 2021-09-14 Vista Outdoor Operations Llc Reduced energy MSR system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035183A (en) 1990-03-12 1991-07-30 David Luxton Frangible nonlethal projectile
US5359937A (en) 1990-03-22 1994-11-01 Snc Industrial Technologies Inc./Les Technologies Industrielles Snc Inc. Reduced energy cartridge
US6439123B1 (en) 2000-08-30 2002-08-27 Snc Technologies Inc. Training cartridge
US6575098B2 (en) 2000-07-10 2003-06-10 The 205Th Arsenal, Combined Service Forces Practice cartridge
US20050183612A1 (en) 2004-01-22 2005-08-25 Rick Huffman Reduced energy training cartridge for self-loading firearms

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5016536A (en) * 1988-04-11 1991-05-21 Rainier International, Inc. Non-lethal practice round for automatic and semiautomatic firearms
US5492063A (en) * 1990-03-22 1996-02-20 Snc Industrial Technologies Inc. Reduced energy cartridge
GB9920205D0 (en) * 1999-08-27 1999-10-27 Lambeth Pty Ltd Training cartridge of a self loading gun
GB0002767D0 (en) * 2000-02-08 2000-03-29 Lambeth Pty Ltd Improvements in and relating to training ammunition

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035183A (en) 1990-03-12 1991-07-30 David Luxton Frangible nonlethal projectile
US5359937A (en) 1990-03-22 1994-11-01 Snc Industrial Technologies Inc./Les Technologies Industrielles Snc Inc. Reduced energy cartridge
US6575098B2 (en) 2000-07-10 2003-06-10 The 205Th Arsenal, Combined Service Forces Practice cartridge
US6439123B1 (en) 2000-08-30 2002-08-27 Snc Technologies Inc. Training cartridge
US20050183612A1 (en) 2004-01-22 2005-08-25 Rick Huffman Reduced energy training cartridge for self-loading firearms

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011130550A2 (fr) 2010-04-14 2011-10-20 Alliant Techsystems Inc. Munition de marquage
WO2011130550A3 (fr) * 2010-04-14 2012-01-12 Alliant Techsystems Inc. Munition de marquage
US8485102B2 (en) 2010-04-14 2013-07-16 Alliant Techsystems, Inc. Marking ammunition
EP2668463A1 (fr) * 2011-01-27 2013-12-04 General Dynamics Ordnance and Tactical Systems - Canada Inc. Cartouche d'entraînement à énergie réduite à structure de réduction de vitesse
EP2668463A4 (fr) * 2011-01-27 2014-08-27 Gen Dynamics Ordnance & Tactic Cartouche d'entraînement à énergie réduite à structure de réduction de vitesse
US9835426B2 (en) 2012-01-16 2017-12-05 Vista Outdoor Operations Llc Spin-stabilized non-lethal projectile with a shear-thinning fluid
US10088287B2 (en) 2012-01-16 2018-10-02 Vista Outdoor Operations Llc Spin-stabilized non-lethal projectile with a shear-thinning fluid
US20220146238A1 (en) * 2020-11-12 2022-05-12 General Dynamics OTS - Canada, Inc. Reduced-energy cartridge with exterior sealing member for fluted chamber
US11656063B2 (en) * 2020-11-12 2023-05-23 General Dynamics OTS—Canada, Inc. Reduced-energy cartridge with exterior sealing member for fluted chamber
RU203194U1 (ru) * 2020-11-27 2021-03-25 Общество с ограниченной ответственностью «АРСЕНАЛ» Патрон для стрельбы из действующих моделей огнестрельного оружия

Also Published As

Publication number Publication date
CA2621708C (fr) 2013-04-16
EP1962048A3 (fr) 2010-02-24
US20100269724A1 (en) 2010-10-28
CA2621708A1 (fr) 2008-08-22
EP1962048B1 (fr) 2013-12-11

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