Breech End Structure Patents (Class 102/469)
  • Patent number: 6286432
    Abstract: A primer assembly includes a head loading assembly including a frontward throughbore, and a rearward throughbore having a stop. A closing plug assembly includes a conically bored open frontward end and an open cylindrical rearward end including an outer flange between the frontward and rearward ends. The closing plug assembly is press fitted into the head loading assembly frontward throughbore. An ignition element assembly is press fitted into the head loading assembly rearward throughbore. The ignition element assembly has an ignition element portion that bears against the stop. The closing plug assembly and the ignition element are located to be captivated by threading a flashtube into a head loading assembly threaded portion.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: September 11, 2001
    Assignee: Alliant Techsystems Inc.
    Inventor: John L. Reider
  • Patent number: 6272994
    Abstract: A flashtube liner for a primer assembly including a head loading assembly. A flashtube containing an ignition charge has an open rearward end connected to the head loading assembly. A closing plug assembly includes a conically bored open frontward end and an open cylindrical rearward end that may include an optional outer flange between the frontward and rearward ends. The closing plug assembly is attached to the head loading assembly located rearwardly of the flashtube. A flashtube liner has a flange at an open rearward end. The flashtube liner is inserted into the flashtube to line the inner wall of the flashtube. The flashtube liner is held in place by the flashtube impinging the flashtube liner flange between the head loading assembly or the optional flange, and the open rearward end of the flashtube. The flashtube liner is constructed of an extruded plastic material.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: August 14, 2001
    Assignee: Alliant Techsystems Inc.
    Inventor: John L. Reider
  • Patent number: 6257148
    Abstract: The invention relates to an arrangement for supporting a mortar shell into the barrel of a mortar weapon by using a separate support piece fixed to the tail of the mortar shell. In the arrangement the support piece is attached to the tail of the mortar shell with a mechanical joint provided by a separate connecting element (7), the connecting element being manufactured of such material and constructed in such a way that it fractures when the charge of the mortar shell is fired, allowing the mortar shell (1) to detach from the support piece (8).
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: July 10, 2001
    Assignee: Patria Vammas Oy
    Inventors: Vesa Tapio Toivonen, Kari Matti Reunamäki, Martti Juleani Lehtimäki
  • Patent number: 6247412
    Abstract: An electric contact assembly in combination with a cartridge to be fired from a weapon barrel. The cartridge has a cartridge case including a metal bottom having an externally exposed outer face; and an electronic unit disposed in the cartridge case. The electric contact assembly includes a first contact arrangement for establishing an electric connection between the electronic unit and an evaluating and control apparatus situated externally of the cartridge. The first contact arrangement includes a contact ring disposed in the cartridge bottom and surrounding the longitudinal axis of the cartridge. The contact ring has an outer face which is approximately flush with the outer face of the cartridge bottom. An insulation electrically insulates the contact ring from cartridge bottom. A second contact arrangement establishes an electric connection between the electronic unit and the evaluating and control apparatus.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: June 19, 2001
    Assignee: TZN Forschungs- und Entwicklungs-zentrum
    Inventor: Karl-Ulrich Vornfett
  • Patent number: 6247411
    Abstract: An electric contact assembly in combination with a cartridge to be fired from a weapon barrel. The cartridge has a cartridge case including a metal bottom having an externally exposed outer face; and an electronic unit disposed in the cartridge case. The electric contact assembly includes a contact arrangement for establishing an electric connection between the electronic unit and an evaluating and control apparatus situated externally of the cartridge. The contact arrangement includes a contact ring disposed in the case bottom and surrounds the longitudinal axis of the cartridge. The contact ring has an outer face which is approximately flush with the outer face of the case bottom. An insulation electrically insulates the contact ring from the case bottom. A magnetic field sensor emits a signal upon closing a breechblock of the weapon in which the cartridge is positioned. A switch is connected between the electronic unit and the contact ring.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: June 19, 2001
    Assignee: TZN Forschungs- und Entwicklungszentrum
    Inventor: Karl-Ulrich Vornfett
  • Patent number: 6178889
    Abstract: A low impulse telescoping cartridge includes a case, a piston, a projectile, and a link. The projectile is seated into the forward portion of the piston. Gas passages permit propellant gases to bleed into the cavity behind the projectile and to accelerate the projectile upon firing. An alternative to using bleed gases is to use a separate propelling charge behind the projectile. The case and piston are assembled and telescopically secured by means of a crimp or other similar feature, to allow relative movement therebetween during chambering and firing. The link may be allowed to move for some portion of the required relative travel between the link and the base of the case. A shoulder on the piston provide a stop through which reaction loads are transmitted to the rear of the barrel during chambering and firing. The piston telescopes over the case during chambering to provide the relative movement between the link and the case base required for weapon function.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: January 30, 2001
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Frank Dindl
  • Patent number: 6131519
    Abstract: A propellant case includes a case sleeve having a longitudinal axis; a case bottom including a case bottom base; and an axially extending case bottom dome having a socket for supporting a primer therein. The case bottom base is releasably attached to the case bottom dome, while the case bottom dome is permanently attached to the case sleeve, whereby upon removing the case bottom from the case bottom dome, a connection between the case bottom dome and the case sleeve is preserved.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: October 17, 2000
    Assignee: Rheinmetall W & M GmbH
    Inventors: Stefan Thiesen, Dieter Jungbluth
  • Patent number: 6101950
    Abstract: Projectile simulation means serve for an acoustic and/or optical representation of the firing of canons or the like. The projectile simulation means are arranged in a pivotable receiving plate of a firing apparatus. There is a danger that, when pivoting the receiving plate for closing the firing apparatus, the projectile simulation means drop out of the receiving plate.According to the invention, the projectile simulation means are provided with spring tongues (27) which project from the outside of the casing (11) and are pressed together when pushing-in the projectile simulation means into the receiving plate. In this manner, the spring tongues (27) are resiliently preloaded, as a result of which they hold the projectile simulation means in the receiving plate in a hook-lie manner.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: August 15, 2000
    Assignee: COMET GmbH
    Inventor: Thorsten Kothe
  • Patent number: 5970879
    Abstract: A firearm cartridge case capable of withstanding internal gas pressures of at least about 50,000 psi has two substantially cylindrical portions of significantly different diameters interconnected by a frusto-conical shoulder portion. The case has a ratio of its overall length to its diameter, at a location 1.25 inches from its base, of no more than about 4.2, giving it an unusually short, fat profile. The base of the case has a rim with an outer diameter substantially no less than the case diameter at the aforementioned location, to facilitate reliable feeding of the cartridge from the magazine. The corresponding firearm chamber which matingly accepts the cartridge is capable of withstanding internal gas pressures of at least about 65,000 psi.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: October 26, 1999
    Inventor: John R. Jamison
  • Patent number: 5969288
    Abstract: Cartridge case (1), especially for a smooth bore gun, comprising three elements made of plastic, namely a tubular body (2) with an assembly end (2a) which tapers into the shape of a cone frustum, a base (3) which has a frustoconical bore (3a) with substantially the same vertex angle as the tapering end (2a) of the tubular body, to which it is matched in order to act as a housing, and a bottom piece (4) with a frustoconical external profile of substantially the same vertex angle as the tapering end (2a) of the tubular body, and as the bore (3a) of the base (3).
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: October 19, 1999
    Assignee: Cheddite France
    Inventor: Jean-Jacques Baud
  • Patent number: 5936189
    Abstract: The cartridged ammunition comprises a projectile (11) and a cartridge case (10) receiving the latter. The cartridge case (10) contains a cartridge (12) limiting a high-pressure space (21) in which a propelling charge (14) is located. The cartridge (12) is surrounded by a low-pressure space (10a) limited by the inside walls of the cartridge case (10) and a part of the base of the projectile (11). At the rear of the projectile (11) a tracer composition (11b) is arranged in a tube (27) which protrudes through the upper wall of the cartridge (12) into the high-pressure space (21). Projectile and cartridge case are interconnected via a rated breaking point (12d). The pressure for expelling the projectile (11) from the cartridge case is supplied by the pressure both in the high-pressure space (21) and in the low-pressure space (10a). Upon expulsion the volume of the high-pressure space (21) is furthermore enlarged when the tracer composition is pulled out thereof.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: August 10, 1999
    Assignee: Nico-Pyrotechnik Hanns Jurgen Diederichs GmbH & Co.
    Inventor: Willi Lubbers
  • Patent number: 5834681
    Abstract: A high-low pressure ammunition cartridge includes a case containing a gas expansion chamber and a missile chamber separated from each other by a pressure containment wall containing one or more pressure control ports providing fluid communication between the gas expansion chamber and the missile chamber. The gas expansion chamber is located between the pressure containment wall and a base plate pressed into the back end of the case. The pressure containment wall may either be integral with the case or a separate piece which is removable from the case along with the base plate to facilitate reloading of the cartridge thereby reducing the cost of using the cartridge. The thickness of the base plate may be varied for varying the volume of the gas expansion chamber. Also, the thickness of the gas containment wall and number and size of holes in the gas containment wall may be varied for varying the velocity of the gas entering the missile chamber from the gas expansion chamber.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: November 10, 1998
    Assignee: Defense Technology Corporation of America
    Inventor: David K. DuBay
  • Patent number: 5710391
    Abstract: Ammunition cartridges are disclosed comprising means for reducing recoil fed to a weapon on discharge of a cartridge. The recoil reducing means comprises non-supportive material between a propellant charge and an end plate of the cartridge in which energy can be absorbed. In a preferred embodiment, the recoil reducing means may comprise one or more toric, air-filled bodies of resilient material.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: January 20, 1998
    Inventor: Francis Chetcuti
  • Patent number: 5563365
    Abstract: A new joint for use in combustible cartridge case munitions which reduces e risk of combustible cartridge case and case base and seal assembly separation during routine handling and minimizes the problems related to dechambering, comprised of a seal mated to the case base and into the exterior of the combustible cartridge case.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: October 8, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John J. Dineen, Andrea L. Zivari-Giannoglou
  • Patent number: 5388499
    Abstract: A cartridge (24) for explosively operated industrial tools is disclosed. The tool (10) is of the type that has a piercer pin (46) that pierces through a surface of the cartridge during assembly of the cartridge within the tool. Then, upon firing of the cartridge, the residual gases (72) formed by the explosion are vented to the atmosphere by moving the piercer pin out of the pierced opening (70). The present cartridge includes a depression (64) in a surface of the base (62) that is in alignment with the piercer pin. There is a relatively thin section (66) of the base left at the bottom of the depression. The thin section is sized so that when it is unsupported, as for example when a defective piercer pin is used, it will fracture under the forces of the exploding powder (38) and the residual gases formed by the explosion will be vented through the fracture and into the atmosphere.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: February 14, 1995
    Assignee: The Whitaker Corporation
    Inventor: Janusz Szyndlar
  • Patent number: 5297491
    Abstract: A casing bottom or stub casing for a propelling charge casing whose base plate (1) has an exterior or outer surface which is curved inwardly in an annular region (7) so that the casing bottom is able to sufficiently axially expand under the high gas pressure developing during firing without requiring the use of a high strength material.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: March 29, 1994
    Assignee: Rheinmetall GmbH
    Inventors: Achim Sippel, Heinz-Josef Kruse, Gisbert Bartsch, Monika Wildau, Jurgen Meyer
  • Patent number: 5277119
    Abstract: The present invention shows an improved 9 mm cartridge casing having greater strength and reliability. This cartridge casing is a substantially hollow cylinder of a suitable metallic material with a length of about nine hundred thousandths of an inch (0.900 in.). The casing is unique in that its external dimensions include a first end portion having an outer diameter of from about three hundred ninety-two thousandths of an inch (0.392 in.) to about four hundred one thousandths of an inch (0.401).The casing also has an opposite end portion with an outer wall which uniformly decreases in diameter from a diameter of from about three hundred ninety-two thousandths (0.392 in.) to about four hundred and one thousandths of an inch (0.401 in.). to an diameter of about three hundred eighty thousandths of an inch (0.380 in.).
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: January 11, 1994
    Inventor: John A. Ricco, Sr.
  • Patent number: 5277118
    Abstract: Cartridge case member with a combustible tube, ammunition with a semicombustible cartridge case incorporating this member and process for filling this ammunition.The present invention relates to the field of combustible ammunition and relates more particularly to that of dart-shell semicombustible ammunition.The invention relates to a cartridge case member (3) with a combustible tube (6) comprising a bottom (7) which has a central opening (8) and a side opening (9). A hollow component (4) enters the said member (3) through the central opening (8) without obstructing the side opening (9). This hollow component (4) is a shell of revolution which comprises, over its entire height, a central cavity on the wall of which are arranged means (18) for fastening a separate component.The invention also relates to semicombustible ammunition (1) comprising a member (3) according to the invention.
    Type: Grant
    Filed: March 5, 1993
    Date of Patent: January 11, 1994
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventor: Bernard Conil
  • Patent number: 5272983
    Abstract: A casing bottom for a propelling charge including a circular ring shaped (annular) base plate (1) which accommodates a centrally arranged primer sleeve (7) in a form-locking manner. In order to be able to unload ammunition, particularly two-part ammunition including sub-caliber projectiles, the rear surface of the primer sleeve is provided with a recess for form-fittingly receiving an extractor. Preferably the recess is of a size which can be accommodated on a sub-caliber projectile.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: December 28, 1993
    Assignee: Rheinmetall GmbH
    Inventors: Achim Sippel, Heinz-Josef Kruse, Gisbert Bartsch, Egon Gampe, Wilfried Becker
  • 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: 5247888
    Abstract: Cartridge case member with a combustible tube, ammunition with a semicombustible cartridge case incorporating this member and process for filling this ammunition.The present invention relates to the field of combustible ammunition and relates more particularly to that of dart-shell semicombustible ammunition.The invention relates to a cartridge case member (3) with a combustible tube (6) comprising a bottom (7) which has a central opening (8) and a side opening (9). A hollow component (4) enters the said member (3) through the central opening (8) without obstructing the side opening (9). This hollow component (4) is a shell of revolution which comprises, over its entire height, a central cavity on the wall of which are arranged means (18) for fastening a separate component.The invention also relates to semicombustible ammunition (1) comprising a member (3) according to the invention.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: September 28, 1993
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventor: Bernard Conil
  • Patent number: 5233925
    Abstract: A percussion igniter for a pyrotechnical gas generator in a safety belt pretensioner is provided. The gas generator has a housing with a guide opening. An impact transmission member such as a ball or pin is received in the guide opening and has an inner end facing an impact face of a priming cap in said gas generator and an outer end projecting from the guide opening.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: August 10, 1993
    Assignee: TRW Repa GmbH
    Inventor: Artur Fohl
  • 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: 5216194
    Abstract: A cartridge case and nozzle assembly is made from a single element of a lightweight durable polymer resin. The cartridge case and nozzle insert into a launch tube of an anti-armor projectile launcher and have improved adhesive connection to reduce relative movement between the assembly and the launch tube. Improved tolerances and better matching of the assembly and the launch tube provide improved reliability for firing. The adhesive connection prevents the launch tube from being reused by adversaries.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: June 1, 1993
    Assignee: Alliant Techsystems Inc.
    Inventor: William A. J. Boire
  • Patent number: 5187324
    Abstract: The present invention shows an improved 9mm cartridge casing having greater strength and reliability. This cartridge casing is a substantially hollow cylinder of a suitable metallic material with a length of about nine hundred thousandths of an inch (0.900 in.). The casing is unique in that its external dimensions include a first end portion having an outer diameter of about three hundred ninety-eight thousandths of an inch (0.398 in.).The casing also has an opposite end portion extending for the remaining length of said casing, with an outer wall which uniformly decreases in diameter from about a diameter of from about three hundred ninety-eight thousandths of an inch (0.398 in.) to a diameter of about three hundred eighty thousandths of an inch (0.380 in.).
    Type: Grant
    Filed: March 27, 1992
    Date of Patent: February 16, 1993
    Inventor: John A. Ricco, Sr.
  • Patent number: 5094169
    Abstract: A cartridge which will produce Magnum velocities for projectiles fired by standard auto pistols, revolvers, submachine guns, or single shot firearms. This cartridge case design provides significant structural strength in the casehead web area, unlike standard straight wall cartridges, which allows increased magnum loads without casehead anomalies, ruptures and bulging. Existing auto pistol cartridge case designs have external straight wall configurations from the case mouth to the rear base rim. Existing designs also have rimless type caseheads, and bevel groove cut into the casehead wall for extraction following firing. They also exhibit nominal to thin casehead web thickness. This innovation, on the other hand, utilizes a unique thicker bevel belted casehead web, located above the extractor groove cut. The casehead expands outward on a bevel slant of about 2.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: March 10, 1992
    Inventor: James E. Evitts
  • 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: 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: 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: 5063853
    Abstract: A cartridge case comprises a metal base piece, a plastic sleeve casing, and a plastic tubular section made as a separate part extending along the inside surface of the sleeve casing. The tubular section includes a flange which extends along and is in intimate contact with an inner face of the base piece. A snap lock design locks the sleeve casing, the base piece and the tubular section together. When the cartridge case includes a flash tube fitted onto the base piece, the tubular section also includes a lip extending from the flange and in intimate contact with the outer surface of the flash tube.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: November 12, 1991
    Assignee: Steyr-Daimler-Puch AG
    Inventor: Elmar Bilgeri
  • Patent number: 5048421
    Abstract: An ammunition cartridge comprises a combustible tubular case having a threaded open end having a uniform density of plastic resin at said end. A generally cup shaped head having a cylindrical peripheral wall provided with threads corresponding to said threaded open end is engaged with the threaded end so as to close the end. The resin is preferably a polyurethane resin and the threads are preferably 60 degree stub threads.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: September 17, 1991
    Assignee: Olin Corporation
    Inventor: Terry L. Swartout
  • Patent number: 5046428
    Abstract: The case of a composite propellent charge cartridge exhibits cracks, after shooting, at the sharp transition of the extractor rim. This has a disadvantageous effect on the number of possible reloadings. The present case permits frequent reloading with little reconditioning. A rotationally symmetrical molding is placed on the case, and at least partially forms the extractor rim. The surface of the case that is in contact with the molding is rounded and smoothed at least at highly stressed points. The reusable cartridge case, with the molding, is suitable for composite propellent charge cartridges.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: September 10, 1991
    Assignee: Hubner Gummi-und Kunststoff GmbH
    Inventors: Ernst D. Jungblut, Werner Knopf, Gerald Rotter
  • Patent number: 5033386
    Abstract: A plastic cased metal headed ammunition casing for high powered rifle cartridges is described in which the plastic case has a pressure regulating baffle or wall in the forward end thereof to regulate and control the development of chamber pressure movement of the bullet into the rifle barrel. The cartridge is charged with a given charge of powder and the cap or head securely fastened to the rearward portion of the plastic casing. The head provides sufficient resistance to the residual pressure after firing so that the cartridge can be used in rapid fire automatic weapons.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: July 23, 1991
    Inventor: Marlo K. Vatsvog
  • Patent number: 5005485
    Abstract: A power booster bushing for obturating powder gases in a cartridge case employed by power actuated tools used for connecting power cables. The power booster bushing supports an explosive power cell and is slidably positioned in the cartridge case bore and has a series of ribs defined by grooves engaging the cartridge case bore. The interface between the cartridge case bore and the bushing is sealed during detonation of the power cell by means of the circumferential ribs. The bushing undergoes an "accordion effect" during detonation characterized by axial compression of the bushing and resulting in the prevention of powder gas escape through the open breech end of the cartridge case.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: April 9, 1991
    Assignee: Burndy Corporation
    Inventors: Kenneth J. Woo, Robert K. Annan
  • Patent number: 4986186
    Abstract: A notched cartridge or casing is provided to mitigate the shock damage to a gun barrel or firing chamber when a cartridge with large amounts of explosive or propellant is fired. The cartridge or casing comprising a generally cylindrical shell with an open top end and a closed base is provided with an annular area near the base and a circular area on the base which have reduced wall thicknesses compared to the rest of the cartridge. The annular and circular areas have external surfaces which are inwardly displaced with respect to the outer surface of the remainder of the cartridge. Upon firing of the cartridge, the areas of reduced wall thickness expand outwardly and are plastically deformed without touching the barrel or firing chamber. Damage to the barrel and/or breech is prevented and the cartridge is easily removed for reloading of the gun system.
    Type: Grant
    Filed: November 1, 1988
    Date of Patent: January 22, 1991
    Assignee: General Dynamics Corporation Air Defense Systems Division, Pomona Facility
    Inventors: Edward W. LaRocca, Norman H. Andersson
  • 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: 4938146
    Abstract: An ammunition comprises a cartridge casing and a propellant unit disposed in the cartridge casing including a propellant housing having a length oriented codirectionally with the length of the cartridge casing, a rear terminal portion held in a rear base of the casing and a frontal terminal portion provided with an external thread. The ammunition further has a projectile housing having a rear length portion received in the frontal end portion of the cartridge casing; and an annular sleeve affixed to the exterior face of the projectile housing base and being in alignment with the propellant housing. The annular sleeve has an internal thread being in a threaded engagement with the external thread of the propellant housing and weakened portions immediately adjacent the exterior face for causing a rupture of the annular sleeve in response to a predetermined propelling force seeking to separate the projectile housing from the cartridge casing upon igniting the propellant.
    Type: Grant
    Filed: September 22, 1989
    Date of Patent: July 3, 1990
    Assignee: Rheinmetall GmbH
    Inventors: Michael Gunther, Wolfgang Graupner
  • Patent number: 4928598
    Abstract: A propelling charge case for a munition, which charge case has a body made of nonwoven nitrocellulose-based fibers and formed to have an axial cross section with at least one curved portion, and a reinforcement member of metal or plastic assembled with the body at the curved portion and configured to not interfere with residue-free combustion of the body.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: May 29, 1990
    Assignee: Rheinmetall GmbH
    Inventors: Udo Sabranski, Hans W. Luther, Horst Sabinski, Jurgen Winkelmann
  • 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: 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: 4770099
    Abstract: A propellant charge igniter for ammunition including an ignition-conducting housing accommodating an electrical ignition system and an initiating charge therein, the housing being formed of an exothermally burning material.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: September 13, 1988
    Assignee: Dynamit Nobel AG
    Inventors: Uwe Brede, Alfred Horr
  • Patent number: 4726296
    Abstract: An ammunition cartridge has a plastic case and a metal base having a plurality of grooves around the periphery thereof. The plastic case has an interference fit with the base. The plastic creeps into the grooves after being interference fit over the base to relieve the stress in the plastic. A stress modulator ring surrounds the plastic member in the area of the grooves.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: February 23, 1988
    Assignee: Action Manufacturing Company
    Inventors: Ervin Leshner, Reed E. Donnard
  • Patent number: 4682545
    Abstract: An ammunition round for a small arms piece including a cartridge casing with a nose opening and base opening at opposite ends thereof and a casing defined internal chamber extending therebetween with the nose opening serving to snugly receive a pellet means and the base opening serving to snugly receive a primer means, the nose opening corresponding in cross-section with the original bore of the barrel of the small arms piece, the casing having an internal protruding displacement extending into the internal chamber adjacent the nose opening to provide a stop seat for the pellet means.
    Type: Grant
    Filed: May 13, 1986
    Date of Patent: July 28, 1987
    Inventor: Thomas M. Jett, Jr.
  • Patent number: 4671179
    Abstract: The target-effective mass of cartridged ammunition is increased while maintaining a predetermined cartridge length.A projectile body has a projectile tail portion extending rearwardly on which a fin or wing-stabilization arrangement is mounted. This tail portion extends rearwardly towards the immediate vicinity of the propellant charge casing bottom. A projection extends rearwardly past the wing or fin-stabilization guide arrangement. This projection includes a massive portion which separates at firing from the propellant charge casing bottom. The rear portion of the projectile body is surrounded by a sheathing of combustible material forming the ignition element which sheathing extends from the cartridge case bottom up to at least the middle of the propellant charge casing and has a longitudinal extent l.sub.2.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: June 9, 1987
    Assignee: Rheinmetall GmbH
    Inventors: Reinhard Synofzik, Michael Schwenzer, Peter Wallow
  • Patent number: 4646644
    Abstract: A pneumatic time delay valve primarily adapted for use in the ejection system of electronic or optical countermeasure devices and the like wherein an explosive squib is employed to create a momentary charge of high pressure gas used to depress the firing pin on the device to activate the device and also to push the device out of an ejection tube. The invention comprises means for splitting the pressurized gas into a first conduit communicating with the firing pin and a second conduit communicating with the device to apply the ejection pressure thereon and a time delay valve disposed within the second conduit for delaying the application of the gas to the device. During the time delay period, a piston is forced down a cylindrical bore forcing metering fluid through an orifice.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: March 3, 1987
    Assignee: Sanders Associates, Inc.
    Inventors: Martin R. Richmond, Mark A. Hayner
  • Patent number: 4454817
    Abstract: A shotshell having a dual rim or "belted" head design. The belt rim is of greater diameter than the maximum inside diameter of the chamber bore of a standard commercial shotgun of the same gauge size, thus preventing the belted shotshell from being fully chambered in a standard commercial shotgun.
    Type: Grant
    Filed: January 13, 1982
    Date of Patent: June 19, 1984
    Assignee: Olin Corporation
    Inventor: Herman N. Bockstruck
  • Patent number: 4276830
    Abstract: An improved cartridge case comprising an exterior plastic tubular member having an end on which is positioned one or more pieces of any type of material assembled and united or connected together with the plastic tube through plastic injection as a single member.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: July 7, 1981
    Inventor: Julio C. Pastora Alice