Having Divided Propelling Charge Patents (Class 102/443)
  • Patent number: 10222186
    Abstract: A projectile extending along an axis X between two ends, the projectile being positioned in a barrel of substantially cylindrical shape of axis X is provided. The projectile comprises: a hollow part at its center, opening onto a first of the two ends of the projectile to receive a compressed fluid, a plurality of vents passing through the projectile from the hollow part substantially perpendicular to the axis X and with a substantially radial outlet to expel the compressed fluid substantially at a tangent to the projectile. The invention also relates to the barrel and to a launch device comprising a projectile and a barrel.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: March 5, 2019
    Assignee: THALES
    Inventors: Stéphane Vézain, Carole Billot, Didier Stanek, Yannick Baudassé
  • Patent number: 9651346
    Abstract: A method of operating a gas operated automatic or semi-automatic weapon that has a bolt that locks by a partial rotation of the bolt with respect to a bolt carrier, the bolt carrier in communication with a gas port on the barrel of the weapon, the method comprising utilizing the gas pressure from a cartridge received from a port in the barrel to unlock the bolt, and utilizing the expansion of a telescoping cartridge in the chamber to recycle the weapon after the bolt is unlocked. In embodiments the cartridge is a 5.56 mm cartridge. In embodiments, the propellant driving the projectile does not provide enough gas pressure to recycle the weapon and the telescoping cartridge supplements the needed power for recycling sufficient to accomplish the recycling. The invention include the telescoping cartridge providing a projectile with lethal energy and recycle capability for gas operated rifles. The subsonic cartridge may have at least 80 ft lbs of energy and operates subsonically.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: May 16, 2017
    Assignee: Vista Outdoor Operations LLC
    Inventors: Erik K. Carlson, Richard D. Hurt, Drew Goodlin, Lawrence P. Head
  • Patent number: 9605932
    Abstract: Gas generators may be utilized for launching a projectile. Launch tubes may include gas generators. Methods of launching a projectile may include utilizing gas generators to impart an initial velocity to a projectile.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: March 28, 2017
    Assignee: Orbital ATK, Inc.
    Inventors: James D. Dunaway, Duane J. Garbe, William P. Sampson, Robert L. Hatch
  • Patent number: 9500451
    Abstract: A munition includes a projectile and a propellant unit. The propellant unit includes a shell having a cylindrical configuration centered on a longitudinal central axis of the munition. The shell has a cylinder opening that receives a cylinder. The cylinder is selectively rotatable in the cylinder opening about a cylinder axis, offset from the munition axis, between a plurality of firing positions. The cylinder has a plurality of propellant chambers each with a respective propellant charge. The propellant chambers are located in the cylinder so that when the cylinder is in a firing position one of the propellant chambers is on munition axis.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: November 22, 2016
    Assignee: Safariland, LLC
    Inventor: John Hultman
  • Patent number: 9360223
    Abstract: A high velocity ignition system for ammunition including an casing, a primer, a payload, a first propellant region, a flash tube, a second propellant and at least one channel. The casing has a base portion and a forward portion. The primer is provided in the base portion. The payload is provided proximate the forward portion. The first propellant region is located in the casing intermediate the primer and the payload. The flash tube substantially extends between the primer and the first propellant region. The second propellant region is located in the casing intermediate the first propellant region and the base portion. The at least one channel extends between the first propellant region and the second propellant region.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: June 7, 2016
    Assignee: VISTA OUTDOOR OPERATIONS LLC
    Inventor: Chris Billings
  • Patent number: 9273941
    Abstract: A method of operating a gas operated automatic or semi-automatic weapon that has a bolt that locks by a partial rotation of the bolt with respect to a bolt carrier, the bolt carrier in communication with a gas port on the barrel of the weapon, the method comprising utilizing the gas pressure from a cartridge received from a port in the barrel to unlock the bolt, and utilizing the expansion of a telescoping cartridge in the chamber to recycle the weapon after the bolt is unlocked. In embodiments the cartridge is a 5.56 mm cartridge. In embodiments, the propellant driving the projectile does not provide enough gas pressure to recycle the weapon and the telescoping cartridge supplements the needed power for recycling sufficient to accomplish the recycling. The invention include the telescoping cartridge providing a projectile with lethal energy and recycle capability for gas operated rifles. The subsonic cartridge may have at least 80 ft lbs of energy and operates subsonically.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: March 1, 2016
    Assignee: Vista Outdoor Operations LLC
    Inventors: Erik K. Carlson, Richard D. Hurt, Drew Goodlin, Lawrence P. Head
  • Patent number: 9200876
    Abstract: A multiple-charge cartridge is disclosed. The cartridge includes an annular casing having an interior void and a primer. A rotatable selector ring is positioned circumferentially about at least a portion of the annular casing. A cam is positioned in the interior void and includes a first charge and a second charge. The cam is coupled to the rotatable selector ring and is configured to rotate about an axis in response to a rotation of the rotatable selector ring. The cam is configured to align the first charge with the primer in response to a rotation of the rotatable selector ring to a first user-selectable position, and to align the second charge with the primer in response to a rotation of the rotatable selector ring to a second user-selectable position.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: December 1, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Toby D. Thomas, Jonathan H. Record
  • Patent number: 8738330
    Abstract: A scalable, inert munition data recorder cartridge. This inert cartridge allows users to record data from within a weapon system feed chute, breach, and extractor port. This cartridge is adaptable to any weapon system, packaging unit, environmental chamber, or other ammunition holding and storage device. Although the cartridge is designed to interface with a weapon and ammunition packaging based on its shape, it still functions as designed regardless of its location and application. This would allow the cartridge to be placed anywhere an actual live cartridge of ammunition could be placed.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: May 27, 2014
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Daniel DiMartino, Jeffrey Darbig
  • Patent number: 8505456
    Abstract: A cartridge ammunition, in particular grenade ammunition, is provided that includes a projectile and a propellant charge case for accommodating the projectile and a propulsion, having a high pressure chamber and a low pressure champer, wherein the projectile and the propellant charge case are fastened to one another by way of a connection. The connection includes a membrane having at least one target braking point/opening point, which opens at a predetermined pressure in the high pressure chamber of the propulsion.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: August 13, 2013
    Assignee: Rheinmetall Waffe Munition GmbH
    Inventor: Detlef Haeselich
  • Patent number: 7905178
    Abstract: Methods and apparatus according to various aspects of the present invention comprise a propelling system for propelling projectiles with variable velocity. In one embodiment, a cartridge comprises a cartridge case, the propelling system, and the projectile attached to the cartridge case.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: March 15, 2011
    Assignee: Raytheon Company
    Inventors: Richard Dryer, Neal M Conrardy
  • Publication number: 20100242773
    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: Application
    Filed: June 6, 2007
    Publication date: September 30, 2010
    Inventor: Bruce G. Van Stratum
  • Patent number: 7802520
    Abstract: A modified cartridge assembly including a projectile having a gas generator proximate its aft end. The projectile includes an aft closure having a cavity filled with gas generating material. The gas generating material is ignited around the time the projectile exits the weapon's muzzle. The gas generating material then burns while the projectile is in flight, spewing pressurized gas into the wake region immediately behind the projectile. The pressurized gas reduces the projectile's base drag.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: September 28, 2010
    Assignee: Martin Electronics
    Inventor: Bruce G. Van Stratum
  • 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: 7712417
    Abstract: A modular propellant charge for semi-fixed ammunition is disclosed. The propellant charge is disposed within an ammunition cartridge canister, and permits direct access to each charge increment. Further, the propellant charge comprises at least one charge increment comprising a rigid section of a cylindrical solid of rotation, and each charge increment has a length less than the central cavity of said ammunition canister.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: May 11, 2010
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Sandor Einstein, Adriana Eng, Donald Chiu
  • Patent number: 7690305
    Abstract: The invention relates to an increment charge (4) to be placed around a tail shaft of a fin-stabilized mortar projectile (1), the increment charge (4) having a centrally located space for the tail shaft and a mounting opening in the space for mounting the increment charge (4). On the opposite side of the increment charge (4) there is provided a protrusion that fits into the mounting opening of an adjacent increment charge (4) for locking them in relation to each other.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: April 6, 2010
    Assignee: Patria Vammas Oy
    Inventors: Timo Pekka Harjula, Ville-Pekka Pesonen
  • Publication number: 20100000438
    Abstract: Methods and apparatus according to various aspects of the present invention comprise a propelling system for propelling projectiles with variable velocity. In one embodiment, a cartridge comprises a cartridge case, the propelling system, and the projectile attached to the cartridge case.
    Type: Application
    Filed: January 10, 2005
    Publication date: January 7, 2010
    Inventors: Richard Dryer, Neal M. Conrardy
  • Publication number: 20090205528
    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: Application
    Filed: May 17, 2006
    Publication date: August 20, 2009
    Inventor: Walter Lebacher
  • Publication number: 20090031912
    Abstract: A housing (1; 100, 104, 102) of a cartridge for a device for firing a projectile has separate first and second chambers (10, 12; 106, 114), each of which contains a respective charge (34, 36; 108, 110, 116, 120) of propellant material. Gas produced by the detonation of one of the charges exits the first chamber to propel the projectile, whilst gas from the detonation of the second charge exist rearwardly from the device so as to counteract recoil. A one way valve may also be provided to help to achieve a high pressure difference between the chambers, where the cartridge has a common igniter assembly.
    Type: Application
    Filed: October 27, 2006
    Publication date: February 5, 2009
    Applicant: RICHMOND EEI LIMITED
    Inventor: Robert Jackson Gilbert
  • Patent number: 7207276
    Abstract: A non-lethal ammunition utilizes dense powder ballast and a two-stage firing sequence for launching non-lethal projectiles of a caliber range from approximately 5.56 mm through approximately 40 mm. The non-lethal ammunition comprises a non-lethal cartridge. The non-lethal cartridge comprises a dense powder ballast and one or more non-lethal projectiles. The dense powder ballast is more massive than the non-lethal projectile providing sufficient payload mass to operate the weapon mechanism while launching the non-lethal projectile at velocities compatible with non-lethal applications. A two-stage ignition system fires the non-lethal ammunition and subsequently fires the more massive dense powder ballast. The firing events are separated by a time delay of less than a second. The non-lethal ammunition provides non-lethal projectile capability for semi-automatic and automatic weapons.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: April 24, 2007
    Assignee: United States of America as represented by the Secretary of the Army
    Inventor: Frank Dindl
  • Patent number: 7150409
    Abstract: The invention in general relates to various injection systems and devices that can be used, for example, in needleless injection systems for human, and for domestic and farm animals. In certain embodiments, the invention provides an injection device comprising: an injector defining a first cavity and an orifice; a movable member in the first cavity; a housing defining a second cavity proximal of the movable member; and a charge in the second cavity, the charge comprising at least two discrete materials.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: December 19, 2006
    Assignee: BioValve Technologies, Inc.
    Inventors: Robert R. Gonnelli, David Lipson, Vasu Nishtala, Ciro Dimeglio
  • Patent number: 6502514
    Abstract: A multi-ignition cartridge and associated methods for use with a firearm are provided. The cartridge preferably includes a casing having an interior cavity which at least partially encloses at least one projectile. Chances of misfire and cold fire are substantially reduced by including in the casing a plurality of chambers. Each of the chambers preferably is in fluid communication with the cavity and containing an ignitable substance to ignite a main charge in the casing to propel the projectile from the casing. The ignitable substance in a chamber is ignited by striking a strike plate that can be positioned in contact with the casing. Related methods are provided for propelling the projectile of a firearm by simultaneously increasing pressure in multiple chambers of a cartridge casing so as to ignite in at least one chamber the ignitable substance contained in each so as to ignite a main charge that propels the projectile.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: January 7, 2003
    Inventor: Christopher A. Holler
  • Patent number: 6354218
    Abstract: A propellant system for launching a large-caliber projectile includes a propellant having at least three partial charges. The first partial charge is adapted to acceleration requirements of the projectile; the second partial charge has a higher combustion velocity than that of the first partial charge; and the third partial charge has a lower combustion velocity than that of the first partial charge. The propellant system further includes an electric energy supply and control device connected to the propellant for igniting the propellant. The electric energy supply and control device has a plasma generator for affecting a combustion behavior of the propellant such as to obtain for said first partial charge, after ignition of the propellant, a maximum gas pressure level of always the same magnitude independently from an initial propellant temperature, and to obtain, for the third partial charge, a conversion such as to prolong the maximum gas pressure level in a predeterminable manner.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: March 12, 2002
    Assignees: Rheinmetall W & M GmbH, TZN Forschungs-und Entwicklungszentrum Unterlüss GmbH, Nitrochemie Aschau GmbH
    Inventors: Thomas Weise, Hans Karl Haak, Paul Schaffers, Peter Lange
  • Patent number: 6209460
    Abstract: The invention provides an improved propellant system for firing projectiles in large caliber guns. Strips of energetic propellant are placed in the cartridge case so that the lengths of the strips are parallel to the length of the cartridge. Preferably, the strips are placed in a radially symmetric pattern. The strips provide passageways that allow ignition gasses to flow radially in the cartridge case and along the length of the cartridge case.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: April 3, 2001
    Assignee: United Defense, L.P.
    Inventors: Brian J. Isle, Amir Chaboki, Steven R. Zelenak
  • Patent number: 6202560
    Abstract: A separate explosive charge within a cartridge is detonated to initiate motion of a projectile and effect delayed ignition of a larger volume of primary propellant. Steady burning of the ignited primary propellant after motion of the projectile is initiated, continues its propulsion with a pressure/displacement profile.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: March 20, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Raafat Guirguis
  • Patent number: 6167810
    Abstract: The invention provides an improved propellant system for firing projectiles in large caliber guns. Strips of energetic propellant are placed in the cartridge case so that the lengths of the strips are parallel to the length of the cartridge. Preferably, the strips are placed in a radially symmetric pattern. The strips provide passageways that allow ignition gasses to flow radially in the cartridge case and along the length of the cartridge case.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: January 2, 2001
    Assignee: United Defense, L.P.
    Inventors: Brian J. Isle, Gerald L. Dittmann, Amir Chaboki, Steven R. Zelenak, Timothy W. Petersen
  • 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: 6012394
    Abstract: A casing for a propellant charge for a piece of ammunition comprises a projectile and a stub. The casing comprises a substantially cylindrical envelope and a closing cover. The cylindrical envelope is made of a plastic material and is in the shape of a lattice formed of strands defining openings. The lattice is formed by a repetitive rectangular mesh. The width of the mesh openings is less than a predetermined diameter of a grain of the propellant charge intended to fill the casing.
    Type: Grant
    Filed: May 15, 1998
    Date of Patent: January 11, 2000
    Assignee: Giat Industries
    Inventors: Dominique Dion, Regis Aumasson
  • Patent number: 5880397
    Abstract: A selectable cartridge is provided consisting of a cartridge head, a dual-bed propellant chamber, a primer, and a tube. The invention enables the user to select a launch velocity prior to chambering the round. A high-velocity projectile is launched by mechanically rotating the base cap and rotation band such that holes along the primer align with the larger of two propellant beds. A low-velocity projectile is launched by rotating the base cap and rotating band a quarter turn from the high-velocity setting such that the holes along the primer align now align with the smaller propellant bed. The invention is suited for use in shotguns.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: March 9, 1999
    Assignee: Scientific Solutions Inc.
    Inventor: Michael Gerard Crilly
  • Patent number: 5714710
    Abstract: Ammunition round comprising a primary cartridge (1) and a secondary cartridge (2) provided with mutually cooperable push fit connection means for connecting the two cartridges during loading. The cartridges (1, 2) incorporate sockets (10, 12) which contain and are connected by a connecting piece (14). Socket (12) includes a cavity (20) having sufficient longitudinal depth to allow some axial movement of the connecting piece (14) ensuring that strain on the connecting piece (14) during loading is minimized.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: February 3, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: Graham Richard Roach
  • Patent number: 5703322
    Abstract: A cartridge for accelerating a projectile includes a light gas pressurized in a sealed container to 5,000-10,000 psi. Upon ignition in the sealed container, a gas mixture having a low or intermediate molecular weight and a high or low energy density is applied as a high sound speed gas to accelerate the projectile to speeds of above about 2.4 km/sec.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: December 30, 1997
    Assignee: General Dynamics Land Systems Inc.
    Inventor: Derek A. Tidman
  • 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: 5443009
    Abstract: A charge arrangement for cartridge ammunition having a cartridge case, a bottom igniter secured in the case bottom and a primer that coaxially surrounds at least one part of the propellant composed of bulk powder and a tail-side part of a projectile that projects into the cartridge case. To ensure reliable ignition of the propellant bulk in a simple manner, a primer is provided that is comprised of either a separate, relatively thin-walled, combustible sleeve or the inner layer of a multilayer, combustible cartridge case which faces the propellant.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: August 22, 1995
    Assignees: Rheinmetall GmbH, WNC Nitrochemie GmbH
    Inventors: Stefan Thiesen, Eckhard Rahnenfuhrer, Josef Kohler
  • Patent number: 5429030
    Abstract: A pressurized light gas in a first chamber segment of a light gas gun is heated and highly pressurized by an electric discharge. Solid chemical propellant in a second chamber segment behind and separated from the first chamber segment by a perforated wall is ignited by the heated and highly pressurized light gas to form a gaseous piston to assist in accelerating the light gas against a projectile.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: July 4, 1995
    Assignee: GT-Devices
    Inventor: Derek A. Tidman
  • Patent number: 5421264
    Abstract: A firearm cartridge with a pre-pressurizing charge and a main propellant charge. The pre-pressurizing charge is located adjacent the rear end of the projectile. The pre-pressurizing charge can burn and exert pressure on the main propellant charge without igniting the main propellant charge.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: June 6, 1995
    Assignee: Colt's Manufacturing Company Inc.
    Inventor: John T. Petrick
  • Patent number: 5400714
    Abstract: A method and an apparatus for producing a large-caliber ammunition unit including a combustible or partially combustible propelling charge casing and compacted or partially compacted propelling charge powder, to increase internal ballistic performance. It is known to partially or completely compact or compress the propelling charge powder in a cartridge casing. However, such methods generally cannot be employed for ammunition including a combustible or at least partially combustible propelling charge casing because of the lower strength of the relatively thin-walled combustible casing material, as this would lead to deformation and/or to reduced loadability of such cartridges.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: March 28, 1995
    Assignee: Rheinmetall GmbH
    Inventors: Stefan Thiesen, Georg Klein, Eckhard Rahnenfuhrer
  • Patent number: 5400715
    Abstract: Ammunition round comprising a forward cartridge 1 including a projectile 6 and a propellant charge 8, a rearward cartridge 2 including a propellant charge 8 and a propellant ignition system 3, 10, 14, and a propellant charge igniter 16 located so as to lie positioned between the first and second propellant charges when the round is loaded, wherein the propellant ignition system includes ignition transfer means 14 for transferring ignition from the rear of the rearward cartridge to the propellant charge igniter and the propellant charge igniter 16 includes ignition propagation means, preferably in the form of igniter cord 26, for spreading ignition laterally to facilitate rapid simultaneous ignition of the two charges.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: March 28, 1995
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Graham R. Roach, Stephen R. Fuller, Charles D. G. Edwards, Steven Gilbert
  • Patent number: 5397543
    Abstract: A gas generator comprises a propellant container having an igniter at one end thereof for igniting a propellant, a secondary propellant charge comprising a plurality of circular grains having a diameter to thickness ratio greater than 2.5, and a primary propellant charge disposed between said igniter and said secondary propellant charge comprising a plurality of circular grains having a diameter to thickness ratio less than 2.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: March 14, 1995
    Assignee: Automotive Systems Laboratory, Inc.
    Inventor: Steven J. Anderson
  • Patent number: 5353710
    Abstract: The technical aspect of the invention relates to containers for a propulsive charge in at least two parts. The container (1a-1b)) according to the invention comprises a casing (9a-9b) demarcating an internal space, in which may be positioned, in particular, a propulsive charge, and it is intended to be rigidly affixed to a second container at one of their frontal faces (10a-10b), wherein it comprises means for the conduction of electricity, intended to receive and transmit a signal emanating from the weapon, as well as connecting means for providing, after the first container has been rigidly affixed to the second container, an electrical connection between these conduction means and other conduction means in the second container. Application for tank ammunition.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: October 11, 1994
    Assignee: Giat Industries
    Inventors: Nicolas Eches, Bernard Brion, Michel Brule, Rene Laurensou
  • Patent number: 5345875
    Abstract: A gas generator comprises a propellant container having a plurality of propellant grains therein, an igniter for igniting the propellant grains, and a shock wave barrier disposed in closely spaced relation to the igniter for attenuating a shock wave emanating therefrom so as to preclude fragmentation of the propellant grains.
    Type: Grant
    Filed: July 7, 1993
    Date of Patent: September 13, 1994
    Assignee: Automotive Systems Laboratory, Inc.
    Inventor: Steven J. Anderson
  • Patent number: 5335599
    Abstract: A performance enhanced ammunition unit composed of a front ammunition component (1) and a rear ammunition component (2) which each include a combustible propelling charge casing (7, 12), with the rear ammunition component being filled with propelling charge powder that has been compressed into a compressed member (15). The rear ammunition component (2) has a casing bottom (13) which accommodates a bottom igniter (14) and the compressed member (15) accommodates a combustible ignition tube (16) for the propelling charge igniter (16, 17), with the combustible tube 16 being in operative engagement with the bottom igniter (14) and extending along substantially the entire axis of the bottom component. Both ammunition components (1, 2) are separated by a combustible disk (18), the front ammunition member (1) is filled in its cylindrical section (8) filled with powder rods (10) and in its section (a) ahead of the powder rods with bulk propelling charge powder (11).
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: August 9, 1994
    Assignee: Rheinmetall GmbH
    Inventors: Stefan Thiesen, Eckhard Rahnenfuhrer
  • Patent number: 5289776
    Abstract: A method and an apparatus for producing a large-caliber ammunition unit including a combustible or partially combustible propelling charge casing and compacted or partially compacted propelling charge powder, to increase internal ballistic performance. It is known to partially or completely compact or compress the propelling charge powder in a cartridge casing. However, such methods generally cannot be employed for ammunition including a combustible or at least partially combustible propelling charge casing because of the lower strength of the relatively thin-walled combustible casing material, as this would lead to deformation and/or to reduced loadability of such cartridges.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: March 1, 1994
    Assignee: Rheinmetall GmbH
    Inventors: Stefan Thiesen, Georg Klein, Eckhard Rahnenfuhrer
  • Patent number: 5282423
    Abstract: A modular propellant charge (10) composed of N propellant charge modules (1; 11-16) each having a length Lo. In order to obtain an economical, durable, easily released connection between the propellant charge modules (1; 11-16), a displaceable sleeve (6; 17-22) of a length L is axially slidably arranged on the exterior of each propellant charge module (1; 11-16) with the relationship ##EQU1## applying for the length L. The displaceable sleeves are utilized to interconnect adjacent modules.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: February 1, 1994
    Assignee: Rheinmetall GmbH
    Inventors: Gunter Sikorski, Albert Schulze, Eckhard Rahnenfuhrer, Dieter Grabner, Frank Achilles
  • Patent number: 5263416
    Abstract: A multi-piece ammunition round includes an aft cartridge, a forward cartridge, and a projectile disposed in an end-to-end nested, serial arrangement. The aft and forward cartridges each contain a charge of propellant. The projectile contains a high explosive filler and a projectile fuze. The round also includes a propellant-primer electrical ignition interconnect arrangement associated with the aft and forward cartridges.
    Type: Grant
    Filed: February 6, 1992
    Date of Patent: November 23, 1993
    Assignee: Alliant Techsystems Inc.
    Inventors: Mark D. Amundson, James L. Kennedy
  • Patent number: 5241909
    Abstract: The invention relates to modular containers for propellant charges. The container includes a container casing which partially defines an inner volume for a propellant charge. The container 1a of the invention that shall be rigidly assembled to another container 1b at one of its end surfaces and is characterized in that it comprises electrical connection means ensuring at least one electrical connection to the second container.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: September 7, 1993
    Assignee: GIAT Industries
    Inventors: Nicolas Eches, Bernard Brion, Michel Brule, Rene Laurensou
  • Patent number: 5216199
    Abstract: A method of manufacturing an improved lead-free primed rimfire cartridge for ammunition or industrial powerloads providing a gas source for driving fasteners with power-fastening tools. A lead-free priming mixture is consolidated into an annular cavity of a rimfire casing and dried in the cavity. The primer is secured in the cavity by tamping at least a portion of propellant into the casing against and over the dried primer. The tamping pressure per casing may range from 1,300 psi to 8,800 psi. Any remaining portion of required propellent is added over the tamped compacted propellant layer. The ammunition and powerload casings are then sealed and finished in a conventional manner. A rimfire cartridge for both ammunition and industrial powerload applications manufactured as described above is also provided.
    Type: Grant
    Filed: July 8, 1991
    Date of Patent: June 1, 1993
    Assignee: Blount, Inc.
    Inventors: Robert K. Bjerke, Kenneth P. Kees, James P. Ward, Walter H. Stevens
  • Patent number: 5180883
    Abstract: To improve the combustion behavior of a two-part large-caliber ammunition round (10) composed of a primary charge (20) and a projectile charge (30), an annular transfer charge (29) is provided in the primary charge (20) underneath a charge casing cover (28) which terminated the primary charge toward the top. The projectile charge (30) is also provided with an annular transfer charge (39) above its propelling charge casing bottom (38). The transfer charge (29) disposed in the primary charge (20) results in rapid destruction of the charge casing cover (28) and of the casing bottom (38). The annular transfer charge (39) disposed in the projectile charge (30) improves the ignition of the tubular propellant (32) disposed in the projectile charge (30) and of the loose powder charge (36) without noticeable time delays relative to the primary charge (20).
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: January 19, 1993
    Assignee: Rheinmetall GmbH
    Inventors: Heinz Jaskolka, Eckhard Rahnenfuhrer, Albert Schulze
  • Patent number: 5179250
    Abstract: The cartridge assembly of the present invention comprises two or more combustible cartridge case segments, the front of which is fastened to the projectile assembly and the rear of which contains a primer assembly and a charge of propellant. The two segments are automatically joined together during loading into a gun chamber via velcro rings at a butted interface between the segments. Extending axially throughout each of the segments is a distributed plurality of flexible combustible ignition strands which, when ignited, propagate the ignition flame front at an extremely high rate, on the order of between 3 to 6 thousand feet per second, ensuring virtually simultaneous ignition of the propellant in each segment.
    Type: Grant
    Filed: January 2, 1992
    Date of Patent: January 12, 1993
    Assignee: Olin Corporation
    Inventor: Ralph F. Campoli
  • Patent number: 5160804
    Abstract: The present invention pertains to fin-stabilized projectile ammunition, in which fin-stabilized projectiles are arranged in a cartridge case filled with propellant charge powder. According to the present invention, the spaces between the fins of the tail plane (4) of the fin-stabilized projectile (13) are filled with prefabricated shaped bodies (7) made from propellant charge powders. These shaped bodies in the ammunition are adjacent to the propellant charge powder in the cartridge case, and permit optimal utilization of the free space between the tail plane fins (20) of the projectiles being filled with high-energy propellant charge. Furthermore, the shaped bodies according to the present invention prevent corrosion of the tail plane fins during the burning off of the ammunition, and facilitate the manufacture of the ammunition.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: November 3, 1992
    Assignees: Mauser-Werke Oberndorf GmbH, Dynamit Nobel AG
    Inventors: Gero Wahner, Dieter Girke
  • 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: 5063851
    Abstract: A round for an expendable breech gun wherein a filament reinforced breeche is lined with propellant throughout its length whereby the burning rate of the propellant in effect varies with projectile speed within the breechcase. A metal or plastic honeycomb bonded to the inner wall of the breechcase provides mechanical support for the propellant and precludes axial progression of the flame front in advance of the projectile. An alternative construction employs a propellant lining having a succession of increasing burning rates from the breech end to the muzzle end of the breechcase.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: November 12, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: William M. Moscrip