Telescoping Powder Charge Patents (Class 102/434)
  • Patent number: 8960094
    Abstract: A bullet defines a chamber and mechanism for extending an explosive body from the chamber. The chamber has a broader top portion than a lower portion. The bullet further defines a channel passage leading out of the top end of the bullet. The bullet contains the explosive body slidably engaged within the channel passage. A shaft is connected to the body and passes down from the body into the lower portion of the chamber. A thrust plate is connected to the shaft end in the chamber. The thrust plate is spring metal and when the cartridge is fired, the thrust plate rises pushing the body so that it extends from the leading end of the bullet. When the thrust plate rises to the second portion of the chamber, it springs open to prevent subsequent downward motion of the thrust plate and consequently prevents subsequent retraction of the body during flight.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: February 24, 2015
    Assignee: BPOE Associates, Trustee for Bullet push-out explosive CRT Trust
    Inventor: S. Mill Calvert
  • Patent number: 8807039
    Abstract: A telescoped ammunition cartridge assembly including a case having a front end and a base end positioned along a longitudinal axis. A projectile is positioned along the longitudinal axis towards the front end of the case. An endcap is coupled to the front end of the case and is adapted to retain the projectile entirely within the case. A primer is positioned along the longitudinal axis towards the base end of the case. A primer support is coupled to the base end of the case and is adapted to support the primer within the case. The cartridge assembly includes at least one obturating lip seal to seal at least one of the endcap or the primer support to the case.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: August 19, 2014
    Assignee: AAI Corporation
    Inventors: David A. Carpenter, William Henry Engel, IV, Brandon S. Recchia, Paul Andrew Shipley
  • Patent number: 8783152
    Abstract: A two piece, two-stage, reduced-energy mechanically operating cartridge is provided for launching, a configured bullet choice of various compositions from a dedicated or modified firearm. The cartridge unit is comprised of a primary case having a cavity to receive a propellant unit or propellant connection and a piston sleeve having a cavity to receive the configured bullet choice, the primary case coupled to the piston sleeve. The cartridge having a retracted pre-firing state and an expanded fired state whereby the piston sleeve and primary case telescope apart forcing, the firearm's slide or bolt to the rear, a mechanical operation opposed to a conventional cartridge with gas blow back operations.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: July 22, 2014
    Assignee: Alliant Techsystems Inc.
    Inventor: Rick Huffman
  • Patent number: 7984668
    Abstract: A two piece, two-stage, rechargeable, reusable, reduced-energy mechanically operating cartridge is provided for launching a bullet of various compositions from a dedicated or modified firearm. The cartridge unit is comprised of a primary case, a piston sleeve, a propellant unit, and a bullet choice of a solid light weight material for inanimate-target applications or a “marking” version for non-lethal live-target training applications. Cartridge includes a piston sleeve and a primary case coupled together via a channel and cog locking/traveling/unlocking system. The primary case includes a substantially non-deformable jacket defining a cavity to receive a propellant unit or propellant connection and provides the channels to receive piston sleeves cogs for a locking/traveling/unlocking feature. The piston sleeve includes a substantially non-deformable jacket defining a cavity to receive configured bullet.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: July 26, 2011
    Assignee: Federal Cartridge Company
    Inventor: Rick Huffman
  • Patent number: 7793591
    Abstract: A modified projectile round which is configured to function with a propellant cartridge such as described in U.S. Pat. No. 7,004,074. The projectile assembly uses a High-Low gas pressure cartridge to launch the projectile. When the high pressure cartridge is ignited, hot propellant gases rupture a burst cup and shoot propellant gases toward the aft end of the projectile. The hot propellant gases impinge against a delay carrier located in the aft end of the projectile. The contents of the delay carrier are thereby ignited. The delay carrier includes one or more delay columns ultimately terminating in an igniter charge. The delay columns burn as the projectile is in flight. A specified amount of time later, the igniter charge ignites an ignitable payload—such as a marker flare candle.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: September 14, 2010
    Assignee: Martin Electronics
    Inventor: Bruce G. Van Stratum
  • Patent number: 7707940
    Abstract: The invention relates to a connecting mechanism for a multiple-part munition (1), for example for artillery charges. It is proposed that a multiple-part munition (1) be connected by means of a simple plug connection to at least two casing elements (2) which can be connected to one another and are arranged axially one behind the other, of a propellent-charge casing (10), with the casing elements (2) having a taper (3) and/or a corresponding opening (4) on their mutually facing end faces or tail faces, and the tapers (3) and/or the inner wall (7) of the openings (4) having projections (8) so that they can be connected to one another with a force fit by pushing them together.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: May 4, 2010
    Assignee: Nitrochemie Aschau GmbH
    Inventor: Walter Lebacher
  • Patent number: 7621208
    Abstract: A two piece, two-stage, rechargeable, reusable, reduced-energy mechanically operating cartridge is provided for launching a bullet of various compositions from a dedicated or modified firearm. The cartridge unit is comprised of a primary case, a piston sleeve, a propellant unit, and a bullet choice of a solid light weight material for inanimate-target applications or a “marking” version for non-lethal live-target training applications. Cartridge includes a piston sleeve and a primary case coupled together via a channel and cog locking/traveling/unlocking system. The primary case includes a substantially non-deformable jacket defining a cavity to receive a propellant unit or propellant connection and provides the channels to receive piston sleeves cogs for a locking/traveling/unlocking feature. The piston sleeve includes a substantially non-deformable jacket defining a cavity to receive configured bullet.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: November 24, 2009
    Assignee: Federal Cartridge Company
    Inventor: Rick Huffman
  • Patent number: 7225741
    Abstract: A two piece, two-stage, rechargeable, reusable, reduced-energy mechanically operating cartridge is provided for launching a bullet of various compositions from a dedicated or modified firearm. The cartridge unit is comprised of a primary case, a piston sleeve, a propellant unit, and a bullet choice of a solid light weight material for inanimate-target applications or a “marking” version for non-lethal live-target training applications. Cartridge includes a piston sleeve and a primary case coupled together via a channel and cog locking/traveling/unlocking system. The primary case includes a substantially non-deformable jacket defining a cavity to receive a propellant unit or propellant connection and provides the channels to receive piston sleeves cogs for a locking/traveling/unlocking feature. The piston sleeve includes a substantially non-deformable jacket defining a cavity to receive configured bullet.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: June 5, 2007
    Assignee: PDT Tech, LLC
    Inventor: Rick Huffman
  • Patent number: 6688233
    Abstract: A system and method for improving the process of mechanical translation of projectiles by a spring mechanism that is built of a smart material and that is activated by an electric pulse, to provide a controlled translation of a projectile before firing or, in case of pre-firing termination, in order to restore the projectile to its original position after translation. The pre-firing translation using the spring mechanism provides a more controlled process and reduces the risk associated with the conventional propulsion charge translation design. The ability to return the projectile to its initial state after translation affords a significant advantage over the conventional propulsion charge design since it enables the projectile firing to be terminated even after translation, unlike in the conventional design whereby the projectile firing is irreversible upon a mechanical translation by setting off the propulsion charge.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: February 10, 2004
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Leon Manole, Stewart Gilman, Ernest Logsdon, Samuel A. Lafontaine
  • Patent number: 6575097
    Abstract: 13A case telescoped ammunition cartridge includes: a cylindrical cartridge case, a projectile disposed within the casing and a sleeve surrounding a portion of the forward end of the projectile. An obturator is disposed between the aft end of the sleeve and part of forward end of the projectile. A cup-shaped aft end seal is affixed to the case at the aft end thereof so as to be relatively movable with respect thereto during firing of the cartridge. The seal includes an external lateral surface adapted to engage an inner wall surface of a gun chamber. A cup-shaped forward end seal is affixed to the case at the forward end thereof so as to be relatively movable with respect thereto during firing of the cartridge. The forward end seal includes an external lateral surface adapted to engage the inner wall surface of the gun chamber and an external end surface adapted to abut a forward end surface of the gun chamber.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: June 10, 2003
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert Nodarse, Leon R. Manole, Samuel LaFontaine, Ernest L. Logsdon
  • Patent number: 6279447
    Abstract: A method for the manufacture of a gun ammunition cartridge including multi-stage insertion of a projectile into a case a distance beyond the inboard terminal end of the neck of the case without deleterious effect upon the gun powder disposed within the case. Substantially full utilization is achieved of the interior volume of the case that is available for the receipt of gun powder.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: August 28, 2001
    Assignee: Cove Corporation
    Inventor: Harold F. Beal
  • Patent number: 6158348
    Abstract: An ammunition cartridge has a base and a sidewall extending from the base to a mouth. The sidewall bounds an interior of the case. A projectile is secured to the case proximate the mouth and has at least an aft portion within the case interior. A propellant charge is located in a first region of the case interior at least in part surrounding the aft portion of the projectile. A second propellant charge is carried within a second region of the case interior generally aft of the first region.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: December 12, 2000
    Assignee: Primex Technologies, Inc.
    Inventor: Ralph L. Campoli
  • Patent number: 5822904
    Abstract: An ammunition cartridge for producing subsonic flight of a projectile therefrom at substantially all angles of fire relative to the horizontal, including an elongated, generally cylindrical case including a closed end containing a primer therein, a body portion suitable for the receipt of a quantity of gunpowder therein, and an open end suitable for receiving an elongated projectile therein.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: October 20, 1998
    Assignee: Cove Corporation
    Inventor: Harold F. Beal
  • Patent number: 5668341
    Abstract: A propulsion system to provide silent firing of a mortar weapon using standard and nonstandard mortar tubes or launch assemblies has been invented. The system utilizes a precision rupture disc mechanism to control combustion and energy release to effect consistent operation. The gases generatedd by combustion of the propellant charge are contained by the rupture disc which insures uniform and efficient propellant combustion. After rupture of the disc at a prescribed pressure, the projectile is accelerated by the expanding gases through the action of a piston on the warhead. The gases are retained within the projectile after accelerating the projectile, preventing release of high pressure gas and resulting in a silent launch condition.In a first embodiment the warhead and piston moves first and then the heavier cylinder is moved. In a second embodiment the cylinder moves with the warhead and picks up the lighter piston.
    Type: Grant
    Filed: June 12, 1995
    Date of Patent: September 16, 1997
    Inventors: George L. Reynolds, John M. Miller, Charles M. Woods
  • Patent number: 5557059
    Abstract: A tubeless cased telescoped ammunition is disclosed. The ammunition is ignited and a sequenced ignition is achieved. The ammunition includes a sealing coating for delaying ignition of the main propellant. A sealing ring may also be used to sequence and delay the ignition.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: September 17, 1996
    Assignee: Alliant Techsystems Inc.
    Inventors: John B. Warren, James Q. Talley
  • Patent number: 5467716
    Abstract: A munition includes a casing having a cylindrical envelope blocked at each end by a plug. A projectile and a propelling charge are placed in the casing. The munition also includes structure to ensure the axial hold of the projectile with respect to the envelope. The structure includes a cap integral with a front part of the projectile and made integral with the front plug by a fastener.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: November 21, 1995
    Assignee: Giat Industries
    Inventor: Roland Boual
  • Patent number: 5433148
    Abstract: A casing includes a cylindrical envelope made of plastic material having a plug of plastic material at each end fitted with a metal reinforcement. The reinforcement is integral with the front plug and includes a ring that has a peripheral cylindrical part and an external edge that entirely covers a top end of the plug, which projects from the envelope.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: July 18, 1995
    Assignee: Giat Industries
    Inventors: Bruno Barratault, Michel Baubois, Roland Boual
  • Patent number: 5408931
    Abstract: Ammunition is disclosed for firing a shotgun slug from a rifled shotgun having a range of about 300 meters. The shotgun ammunition comprises a cartridge, propellant, a fiber wad, and a slug. The slug includes a nose having a parabolic cross-section, a frustoconical rotation ring, and the slug has an internal cavity. The increased range enhances a shotgun's use in hunting, military, and police applications.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: April 25, 1995
    Inventor: Harvey A. Tallman
  • Patent number: 5388522
    Abstract: A cartridge case for a cased telescoped ammunition round 10. The cartridge case includes a hollow cylindrical casing 12 the axis 15 of which is also the axis of symmetry of round 10. The inner surface of casing 12 has a longitudinal groove 48 formed in it along which groove 48 casing 12 splits when round 10 is fired. A rear seal 16 closes the rear end of casing 12 and a front seal 18 closes the front end of casing 12. A hollow cylindrical control tube 20 which includes a control portion 22 and a sleeve portion 24 is secured to seals 16, 18 so that control tube 20 is symmetric with axis 15. A spring 26 interconnects control portion 22 and sleeve portion 24 of control tube 20 and applys a force substantially parallel to axis 14 to seals 16, 18 to move seals 16, 18 toward each other to minimize the distance between seals 16, 18 after the round is fired and to confine the casing between seals 16, 18.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: February 14, 1995
    Assignee: Alliant Techsystems Inc.
    Inventors: Wilford E. Martwick, Brian B. Tasson
  • Patent number: 5272982
    Abstract: A telescoped ammunition cartridge, including a cylindrical cartridge casing having one end closed by a base, a full caliber projectile disposed within the casing, wherein the projectile has a cylindrical aft section and a tapered fore-section, at least one annular sleeve fitted in the casing at a fore-section thereof, wherein only the fore-section of the projectile is located within the annular sleeve. Further, the cartridge includes a detachable nose fairing fitted inside and contacting the annular sleeve to form a nose fairing sleeve assembly, wherein the nose fairing is integral with the projectile and is located at the tapered fore-section of the projectile, the assembly defining a support for the tapered fore-section of the projectile. The cartridge advantageously includes fixed supports defined by elongated ridges fitted between the nose fairing and the casing and extending to the aft section of the projectile to provide support therefor, wherein spaces are defined between the fixed supports.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: December 28, 1993
    Assignee: GIAT Industries
    Inventors: Michel Desevaux, Pierre Ducros
  • Patent number: 5265540
    Abstract: A telescoped ammunition round including a plastic case having a cylindrical casing, a front end cap and a rear end cap, the front and rear end caps being fitted at front and rear ends of the casing. The round further includes a projectile, a propulsive charge and an ignition device disposed within the casing. Sealing means are provided to form a gas-tight seal between the front and rear end caps and the cylindrical casing to prevent escape of propellant gases generated from the propulsive charge. Importantly, axial retaining devices are included to prevent longitudinal movement of the front and rear end caps before firing, and allow movement thereof after firing, wherein the end caps are not completely separated from the casing after ignition of the propellant charge.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: November 30, 1993
    Assignee: Giat Industries
    Inventors: Pierre Ducros, Michel J. Desevaux, Chris G. De Veth
  • Patent number: 5233928
    Abstract: The invention relates to a telescoped ammunition round, comprising a case (2) made from plastic material made up of a cylindrical casing (3a, 3b) and two end caps (4a, 4b) disposed at opposite ends of the casing (3a, 3b). The case (2) is advantageously formed from two half-cases (2a, 2b) with each end cap (4a, 4b) forming a single piece moulded with the associated half-case (2a, 2b) and comprising axial expansion devices (12a, 12b).
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: August 10, 1993
    Assignee: GIAT Industries
    Inventors: Pierre Ducros, Michel P. Giraudon
  • Patent number: 5192829
    Abstract: The invention relates to an ignition device for the propulsive charge of a telescoped piece of ammunition, including a case (2) that is generally cylindrical in shape in which are housed a pyrotechnic composition (3) and a device (4) for ignition thereof. The case (2) has at least one end wall (6) traversed by several channels (10) which each extend along an axis (A1) that slopes in relation to the centre line (A) of the case (2). This device enables all the propulsive charge of a round of ammunition of the telescoped type to be ignited almost immediately.
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: March 9, 1993
    Assignee: Giat Industries
    Inventor: Christian G. Suire
  • Patent number: 5173571
    Abstract: A telescoped ammunition round comprises: a propellant charge having an axial cavity for supplying firing power for the ammunition round; a projectile housed within the axial cavity for being fired from a forward end of the ammunition round; a control tube means housed within the axial cavity for selectively covering an aft surface portion of the propellant charge axial cavity, the control tube means having a generally cylindrical axial bore substantially coaxial with the axial cavity, the projectile extending forward of the control tube means; coupling means for releasably securing the projectile to the control tube means; a control tube pistion having a generally cylindrical outer shape forming a sliding fit within the axial bore, positioned aft of the projectile; a booster charge within the axial bore, the control tube piston being forwardly movable in response to the firing of the booster charge and the projectile, in turn, being forwardly movable by forward movement of the control tube piston; a primer me
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: December 22, 1992
    Inventor: Donald N. Montgomery
  • Patent number: 5163165
    Abstract: A telescoped ammunition cartridge, including a generally cylindrical cartridge casing closed at its rear section by a base, a full caliber projectile disposed within the cartridge casing, the projectile having an aft section and a tapered fore-section, at least one annular sleeve fitted inside the casing at a fore-section thereof, wherein only the tapered fore-section of the projectile is located within the annular sleeve, a detachable nose fairing fitted inside and contacting the at least one sleeve to define a nose fairing sleeve assembly. The nose fairing is integral with the projectile and is located substantially at the tapered fore-section of the projectile, and defines the sole support of the tapered fore-section of the projectile.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: November 10, 1992
    Assignee: Giat Industries
    Inventors: Michel Desevaux, Pierre Ducros
  • Patent number: 5157224
    Abstract: A device for holding and guiding a sub-projectile in a cylindrical casing and in a weapon barrel, which includes a sabot having a sub-projectile within the sabot, a cylindrical casing within which is disposed a projectile, which comprises the sub-projectile and sabot, the sabot having a plurality of arms substantially in the aft section for providing stability and guidance to the projectile inside the weapon barrel, means within the casing for providing stability for the aft section of the projectile, and an annular bush within the fore section of the cylindrical casing cooperating with the fore section of the sabot for providing stability of the sub-projectile.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: October 20, 1992
    Assignee: GIAT Industries
    Inventors: Michel J. Desevaux, Pierre Ducros
  • Patent number: 5147978
    Abstract: A cased telescoped ammunition in which a rigid liner fills the gap between the control tube and the metering tube. The liner comprises an energetic material which transfers the ignition stimulus from the control tube propellant to the main propellant. Energetic materials in the liner an be modified to increase the ignition stimulus for proper cold round performance or decrease ignition stimulus for an improved timed sequencing of the round's performance. Both double-based and single-based energetic materials may be used.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: September 15, 1992
    Assignee: Alliant Techsystems Inc.
    Inventors: James R. Northrup, Brian B. Tasson
  • Patent number: 5069137
    Abstract: A cartridge case 64 for a cased telescoped ammunition round 10. Cartridge case 64 includes a casing 12 having inwardly tapering conical end portions 14, 16 and end seals 20, 22 which undergo elastic deformation when round 10 is fired from a gun. A plurality of spring fingers 62 are formed on portions 14, 16. Conical portions 14, 16 fit into seals 20, 22. Casing 12 is secured to seals 20, 22 by the tips 66 of spring fingers 62 fitting into catch grooves 56, 56' of seals 20, 22. A control tube 24 is secured to rear seal 20 and a primer 30 is mounted in control tube 24. Projectile 26 is mounted within round 10 with its piston 28 located within control tube 24. Main propellant charge 36 is positioned around control tube 24 and round 26. A booster charge 32 is positioned with control tube 24. Axial growth of casing 12 compresses spring fingers 62 retract end seals 20, 22 after firing. Radial expansion of cartridge case 64 is accommodated by elastic deformation of the casing.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: December 3, 1991
    Assignee: Honeywell Inc.
    Inventor: Wilford E. Martwick
  • Patent number: 5067408
    Abstract: A cartridge case 68 for a cased telescoped ammunition round 10. Cartridge case 68 includes a hollow cylindrical casing 12 fabricated from a material which undergoes elastic deformation when round 10 is fired from a gun, a rear seal 20 and a front seal 22. A control tube is secured to rear seal 20 and a primer is mounted to be in communication with the interior of control tube 24. Casing 12 has an axis of symmetry 18 which is also the axis of symmetry of round 10, and control tube 24. Seals 20, 22 each have side walls 48, 48' in which crimp grooves 56, 56' are formed. Each crimp groove includes a cam surface 58, 58'. Rear and front portions 14, 16 of casing 12 are crimped into grooves 58, 58'. A projectile 26 provided with a booster piston 28 is mounted within round 10 with piston 28 being located within control tube 24. The main propellant charge 38 is positioned around control tube 24 and round 26, and a booster charge is positioned with control tube 24.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: November 26, 1991
    Assignee: Honeywell Inc.
    Inventor: Wilford E. Martwick
  • Patent number: 5067407
    Abstract: A cartridge case 68 for a cased telescoped ammunition round 10. Cartridge case 68 includes a spirally wrapped hollow cylindrical casing 12 fabricated from a thin sheet of spring tempered high carbon steel which partially unwinds at the time round 10 is fired from a gun, a rear seal 16, and a front seal 18. A control tube 20 is secured to rear seal 16 and a primer 26 is mounted in communication with the interior of control tube 20. Casing 12 has an axis of symmetry 14 which is also the axis of symmetry of round 10, and control tube 20. Seals 16, 18 each have side walls 42, 42' in which crimp grooves 50, 50' are formed. Each crimp groove includes a cam surface 52, 52. Rear and front portions 62, 64 of casing 12 are crimped into grooves 50, 50'. A projectile 22 provided with a booster piston 24 is mounted within round 10 with piston 24 being located within control tube 20.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: November 26, 1991
    Assignee: Honeywell Inc.
    Inventor: Wilford E. Martwick
  • Patent number: 5063848
    Abstract: An igniter bag for a cannon cartridge is disclosed which comprises a generally toroidal annular bag of combustible fabric such as cotton or rayon containing an ignition powder. The bag has a plurality of radial seams separating the bag and the powder contained therein into separate adjacent compartments within the bag so that movement of the powder within the bag is substantially restricted. This construction prevents side to side shifting of the ignition powder during storage, handling and loading of the cartridge.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: November 12, 1991
    Assignee: Olin Corporation
    Inventors: Mark A. Tucker, Robert M. Musgrave
  • Patent number: 5063852
    Abstract: A cased telescoped ammunition round 10 for a fin stabilized penetrator 32. A full caliber control tube 24 is positioned within casing 12, its forward end 28 being secured to front seal 22. The side walls 87 of control tube 24 are tapered, increasing in thickness from the free standing aft end 26 of control tube 24 to its forward end 28. Penetrator 32 and sabot 36 are positioned within control tube 24 with obturator band 46 and retaining groove 36 of aft bourrelet 36 positioned within control tube 24. Retaining groove 52 at the aft end of control tube 24 with split ring 50 and retaining groove 48 of aft bourrelet 36 retain sabot 34 and penetrator 32 within control tube 24 until round 10 is fired. Tapered side walls 87 minimize the volume of control tube 24 while assuring that side walls 87 are strong enough to withstand forces acting on control tube 24 forward of obturator band 46 when round 10 is fired.
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: November 12, 1991
    Assignee: Alliant Techsystems Inc.
    Inventor: J. Bruce Warren
  • Patent number: 5048422
    Abstract: A cased telescoped ammunition in which a rigid liner fills the gap between the control tube and the metering tube. The liner comprises an energetic material which transfers the ignition stimulus from the control tube propellant to the main propellant. Energetic materials in the liner can be modified to increase the ignition stimulus for proper cold round performance or decrease ignition stimulus for an improved timed sequencing of the round's performance. Both double-based and single-based energetic materials may be used.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: September 17, 1991
    Assignee: Honeywell Inc.
    Inventors: James R. Northrup, Brian B. Tasson
  • Patent number: 5048423
    Abstract: A cartridge case for a telescoped ammunition round has a generally tubular case wall and an axially extending elongate score line in said wall to provide pressure relief during firing of the round. The elongate score line has a radial depth less than the radial thickness of the wall.
    Type: Grant
    Filed: July 6, 1990
    Date of Patent: September 17, 1991
    Assignee: Loral Aerospace Corp.
    Inventor: Harold E. Garrett
  • Patent number: 5042388
    Abstract: A cased telescoped ammunition with a perforated forward control tube in which the main propellant gas and flame front ignites a propellant surrounding the tube through the perforations. Seals form annular segments of consolidated propellant surrounding the tube separated from each other and the main propellant charge. These seals prevent gas and flame front propagation from the main or rearmost charge of propellant, except through the control tube perforations or ports which have been passed by the obturator.
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: August 27, 1991
    Assignee: Alliant Techsystems Inc.
    Inventors: John B. Warren, David E. Broden
  • Patent number: 5029530
    Abstract: A cartridge case 76 for a cased telescoped ammunition round 10. Cartridge case 76 includes a hollow cylindrical outer casing 12 the axis 18 of which is also the axis of symmetry of round 10. The inner surface of outer casing 12 has a longitudinal groove 50 formed in it along which groove 48 outer casing 12 splits when round 10 is fired. A front seal 20 closes the front end of casing 12 and a rear seal 22 closes the rear end of casing 12. A hollow cylindrical control tube 24 is secured to rear seal 22 so that control tube 24 is symmetric with axis 18. Three bolts 52, 53, 54 which are made of a material having a yield strength greater than the maximum stress to which the bolts 52, 53, 54 are subjected when round 10 is fired interconnect front and rear seals 20, 22.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: July 9, 1991
    Assignee: Honeywell Inc.
    Inventors: Wilford E. Martwick, Brian B. Tasson
  • Patent number: 4938145
    Abstract: A cased telescoped ammunition round includes a propellant charge disposed in a tubular case. The case is composed of a skin tube and end caps on opposite ends of the tube. The case defines a chamber that contains the propellant charge. The charge has an axial bore containing a control tube at least at an aft portion of the bore. The control tube is attached at least at its aft end to the aft one of the case end caps. A projectile is housed within a forward portion of the axial bore of the propellant charge, and a primer is disposed within an aft portion of the control tube. The primer is actuatable for igniting the propellant charge to cause firing of the projectile forwardly from the case.
    Type: Grant
    Filed: November 24, 1989
    Date of Patent: July 3, 1990
    Assignee: Honeywell Inc.
    Inventor: Wilford E. Martwick
  • Patent number: 4930423
    Abstract: This invention provides a liquid propellant round of ammunition having a traveling charge which is ignited after both such charge and the projectile have received an initial forward acceleration.
    Type: Grant
    Filed: December 18, 1988
    Date of Patent: June 5, 1990
    Assignee: General Electric Company
    Inventor: Melvin J. Bulman
  • Patent number: 4907510
    Abstract: A cased telescoped ammunition round includes a propellant charge disposed in a tubular case and having an axial bore containing a center sleeve attached at its opposite ends to the opposite ends of the case. A projectile is housed within a forward portion of the center sleeve and a primer within an aft portion thereof. The primer is actuatable for igniting the propellant charge to cause firing of the projectile. Features are provided to ensure dimensional recovery of the tubular case after firing of the projectile. One feature relates to the center tube being composed of a material which provides sufficient elasticity to stretch and contract uniformly from and to dimensions allowing ejection of the tubular case from the gun chamber. Another feature relates to longitudinal structural members provided to extend between and fasten to opposite ends of the case, and spaced circumferentially about and between the center sleeve and the case.
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: March 13, 1990
    Assignee: Honeywell Inc.
    Inventors: Wilford E. Martwick, Brian B. Tasson
  • Patent number: 4858533
    Abstract: A cased telescoped ammunition round 40 for a fin stabilized penetrator projectile 50. A cylindrical core tube 48 is positioned within the casing 42. Projectile 50 and its sabot 52 are positioned within core tube 48. The space between core tube 48 and casing is filled with the main charge 66. An igniter 62 is located in the rear seal 46 of casing 42 and when initiated, ignites booster charge 64 located within core tube 48 between sabot 52 and rear seal 46. Ignition ports 70 in core tube 48 permit the ignition products of booster charge 64 to ignite main charge 66 when sabot 52 moves a predetermined distance through core tube 48.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: August 22, 1989
    Assignee: Honeywell Inc.
    Inventor: J. Bruce Warren
  • Patent number: 4846069
    Abstract: An improved cased telescoped ammunition round includes a propellant charge disposed in a tubular case and having an axial bore. The case is composed of a skin tube and forward and aft end caps on opposite ends of the tube. The case defines a chamber that contains the propellant charge. Separate forward and aft tubes are disposed in the case extending at least partially through the axial bore of the propellant charge from respective forward and aft ends of the bore. The separate tubes are attached respectively to the forward and aft end caps of the case. A projectile is housed within the separate tubes and the axial bore of the propellant charge, and a primer is disposed within an aft end of the aft tube. The primer is actuatable for igniting the propellant charge to cause firing of the projectile forwardly from the case.
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: July 11, 1989
    Assignee: Honeywell Inc.
    Inventors: Brian B. Tasson, J. Bruce Warren
  • Patent number: 4846068
    Abstract: A cartridge (1) comprises a cartridge case (2), which is closed at its rear end and contains a propellant charge (3) and a primer (7). The tip portion of the cartridge case defines a socket (4), which accommodates a full-bore projectile (5). The tip portion (2b), terminates adjacent to the nose of the projectile in an end face that is normal to the axis of the cartridge. That tip portion has an outside peripheral surface, which tapers with a substantially concave contour toward said forward end face. To provide a cartridge (1) which can easily be manufactured and can reliably be fired and can be gas-tightly inserted into the chamber of the firearm, the tip portion (2b) is formed in its rear end portion with a peripheral annular groove (6), which is open to the interior of the cartridge case and which contains the primer (7).
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: July 11, 1989
    Assignee: Steyr-Daimler-Puch Aktiengesellschaft
    Inventor: Ulrich Zedrosser
  • Patent number: 4803927
    Abstract: An improved telescoped ammunition round having a projectile comprising an aft recess to receive a booster tube that is affixed to the cartridge case and which remains stationary relative to the cartridge case throughout the firing sequence. The booster tube is provided with a primer to ignite the booster charge and is positioned within the projectile recess to initially propel the projectile and subsequently ignite the main propellant within the cartridge case after the projectile has been forced at least partially into the gun barrel.An improved method of manufacturing such an ammunition round utilizes an aluminum alloy seamless tube as a cartridge case and at least one case end seal. The seal is configured to have a unique angled slot and the case end is conically shaped by a mandrel to be press fit into the seal slot. Once mated in this fashion, the cartridge case and seal are firmly secured to each other.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: February 14, 1989
    Assignee: Aerojet-General Corporation
    Inventor: William J. Washburn
  • Patent number: 4803926
    Abstract: A projectile assembly comprising a carrier and a projectile arranged for insertion in the unmodified breech of a gun, the carrier having a ramming piston which urges the projectile into the barrel of the gun ready for firing whereupon the carrier is ejected and replaced by a propellant cartridge for firing the projectile from the barrel. The assembly is suitable for use in a belt fed automatic gun in which projectile assemblies are alternately interspersed with propellant cartridges such that a projectile is placed in the gun barrel by the projectile carrier, the carrier is ejected and then the next item on the belt, a propellant cartridge is placed in the breech for firing the gun.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: February 14, 1989
    Assignee: British Aerospace PLC
    Inventors: Arthur E. M. Barton, Spencer D. Meston
  • Patent number: 4802415
    Abstract: A telescoped ammunition round comprises:a propellant charge having an axial cavity for supplying firing power to the ammunition round;a control tube means housed within the aft end of the axial cavity;a booster charge within the axial bore of the control tube, fireable in response to a primer means of the ammunition round in communication therewith; anda sabot/projectile assembly mounted within the axial cavity, its aft end extending into the control tube, wherein the sabot comprises an integral piston at its aft end to receive propulsive forces upon firing of the booster charge of the ammunition round.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: February 7, 1989
    Assignee: Ford Aerospace Corporation
    Inventors: Stephen E. Clarke, James D. Hendry, Ernest R. Mijares
  • Patent number: 4782758
    Abstract: An improved telescoped ammunition round having a projectile comprising an aft recess to receive a booster tube that is affixed to the cartridge case and which remains stationary relative to the cartridge case throughout the firing sequence. The booster tube is provided with a primer to ignite the booster charge and is positioned within the projectile recess to initially propel the projectile and subsequently ignite the main propellant within the cartridge case after the projectile has been forced at least partially into the gun barrel.
    Type: Grant
    Filed: December 16, 1986
    Date of Patent: November 8, 1988
    Assignee: AeroJet-General Corporation
    Inventor: William J. Washburn
  • Patent number: 4770098
    Abstract: A telescoped ammunition round utilizing nonstrategic materials is light-weight and enables the use of conventional particulate propellants as well as conventional components such as projectiles and primers if desired. Webs molded into the case interior facilitate molding of the case and provide for supporting the projectile therein before and during the loading of particulate propellant into the case. In addition, the webs are operative for decreasing the longitudinal resistance of the case thereby reducing inward movement of the primer when struck by a firing pin thereby reducing the possibility of misfire. The projectile is prevented from debulleting during handling and is provided with preselected shot-start characteristics by an opening formed through the cap and a plurality of holes formed in the cap to provide proper resiliency in the cap for holding the projectile before firing and retarding the projectile momentarily upon firing.
    Type: Grant
    Filed: July 3, 1987
    Date of Patent: September 13, 1988
    Assignee: Ares, Inc.
    Inventor: Eugene M. Stoner
  • Patent number: 4715284
    Abstract: A telescoped ammunition round has a propellant charge with an axial cavity. A projectile is housed within the cavity for being fired from the ammunition round. A wear additive is coupled to the forward portion of the propellant charge adjacent the axial cavity.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: December 29, 1987
    Assignee: Ford Aerospace & Communications Corp.
    Inventors: James D. Hendry, Lee A. Tobias
  • Patent number: 4691638
    Abstract: In cased telescoped ammunition the improvement which comprises an arrangement for securing the cartridge casing to the end caps so as to enable and limit axial movement therebetween.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: September 8, 1987
    Assignee: Honeywell Inc.
    Inventors: David A. Meyer, Brian B. Tasson, Robert F. Vollmer, J. Bruce Warren
  • Patent number: 4681038
    Abstract: An ammunition round cartridge case having a stress riser in the form of at least one elongated recess adapted for preserving the seal of ignition gases within the cartridge case during initial stages of ignition and also adapted for allowing a splitting of the cartridge case wall surface at peak gas pressure within the cartridge case during firing whereby to permit easy extraction or push-through ejection of the cartridge case from the gun chamber subsequent to firing of the round. A preferred embodiment utilizes a unitary recess that is parallel to the longitudinal axis of the cartridge case, longer than one-half of the length of the cartridge case and which has a triangular cross-section the apex of which extends more than halfway into the wall surface of the cartridge case.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: July 21, 1987
    Assignee: Aerojet-General Corporation
    Inventor: William J. Washburn