With Projectile Exposed To Propellent Gas Patents (Class 102/523)
  • Patent number: 9846017
    Abstract: A high pressure obturator for a breech loaded, tube-launched projectile includes a generally annular ring having a central longitudinal axis and a radially inward portion. A flange portion is disposed radially outward of and partially contiguous with the radially inward portion. The flange portion extends axially forward and aft beyond the radially inward portion. The outer diameter of the flange portion decreases linearly from an aft most outer diameter to a forward most outer diameter. The obturator may be formed of a plastic material and include circumferential wraps of a high-strength fiber completely embedded in grooves in the obturator.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: December 19, 2017
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Ryan Hooke, Tyler Myers
  • Patent number: 9719952
    Abstract: This method determines the amount of extracellular fluid surrounding a surface disposed inside a plant, the ion population in that fluid and the identity of the dominant ion in that fluid. The method has four parts: 1) Providing an electrochemical circuit between the surface and external electronics 2) Executing two electrochemical procedures which result in a sequence of measured charge transfer values, 3) Processing the measured charge transfer values into a value proportional to the of extracellular fluid surrounding the surface, a value proportional to the total ion population in the fluid and a value that identifies the dominant ion in the fluid, 4) Generating a set of time/quiescent potential pairs of values which are used to identify the dominant ion type in the extracellular fluid during different time ranges.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: August 1, 2017
    Inventor: William G Gensler
  • Patent number: 9488455
    Abstract: A sabot assembly includes a projectile and a housing dimensioned and configured for receiving the projectile. An air pressure cavity having a cavity diameter is disposed between a front end and a rear end of the housing. Air intake nozzles are in fluid communication with the air pressure cavity and each has a nozzle diameter less than the cavity diameter. In operation, air flows through the plurality of air intake nozzles and into the air pressure cavity upon firing of the projectile from a gun barrel to pressurize the air pressure cavity for assisting in separation of the housing from the projectile upon the sabot assembly exiting the gun barrel.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: November 8, 2016
    Assignee: Consolidated Nuclear Security, LLC
    Inventor: Fariborz Bzorgi
  • Patent number: 9250049
    Abstract: Sabots for projectiles are provided. One sabot includes a body formed from at least one section, wherein the body is configured to surround a portion of a projectile. The sabot also includes one or more engagement portions configured to interface the body with another sabot such that the body is supported at an intermediate position of the projectile, and one or more surfaces configured to interface with an outer mold line of the projectile. The sabot further includes one or more surfaces configured to interface with an inner surface of a launch platform.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: February 2, 2016
    Assignee: The Boeing Company
    Inventor: Craig R. DeMeester
  • Patent number: 9146086
    Abstract: A bullet system including a bullet body with a tail portion engaged with a polymer cup that provides enhanced engagement of the barrel upon firing. The bullet system may have a radial retracted state that corresponds to an elongated axial state of the bullet system that allows the cupped bullet to be fed down the barrel at a reduced diameter with reduced engagement with the barrel. The radial expansion of the bullet system occurs upon axial length reduction of the bullet system by axial compression. The axial compression can occur upon firing of the propellant or when loading with the ramrod. The bullet system can provide a tactile seat force indicator tip insert within the tip of the bullet body that provides a tactile sensation when the bullet is properly seated against the propellant charge. A cutting edge may be provided for scraping the barrel upon insertion of the bullet.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: September 29, 2015
    Assignee: Vista Outdoor Operations LLC
    Inventors: Bryan P. Peterson, Drew L. Goodlin, Erik K. Carlson, Lawrence P. Head, John W. Swenson, Sharon Jones
  • Patent number: 8640625
    Abstract: A kinetic energy training cartridge simulates the performance, weight, length, and external geometry of a tactical cartridge. The training cartridge includes a cartridge case and a projectile that is secured to cartridge case by means of a sabot. The sabot includes a rearward extension that encapsulates part of the projectile, to add weight and to increase a length to diameter ratio of the projectile, so as to decrease an intrusion volume of the projectile within the cartridge case. In a preferred embodiment, the length to diameter ratio of the projectile is at least 15.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: February 4, 2014
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Brian Wong, Andrew Gowarty, Francis Donlon, Francis Renner, Robert Sayer, Carlton Adam, Daniel Vo, John Dineen, Anthony Farina
  • Patent number: 8561544
    Abstract: The invention relates to a projectile (1) having a sub-caliber projectile core (2) and a guide cage or sabot (3) that comprises a driving element (4), which acts on the projectile core (2) at the rear thereof and is in the form of a plate composed of metal. In order to produce such a projectile (1) at low cost, the projectile core (2) and the driving element (4), which is in the form of a plate, are inserted as inserts into an injection-molding tool, and are extrusion-coated so that the injection-mold shape is chosen so that the contour of the guide cage or sabot (3) of the projectile (1) is produced after the injection-molding process.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: October 22, 2013
    Assignee: Rheinmetall Waffe Munition GmbH
    Inventors: Christian Baumann, Holger Brase, Thomas Heitmann, Michael Vagedes
  • Patent number: 8424233
    Abstract: Clips for use with projectiles and projectile stacking systems in which individual projectiles are clipped together to form a stack are disclosed. The projectiles may be joined individually by a user before loading in a barrel, or during a loading process assisted by features on the breech of the barrel. The tail of each projectile includes a set of clips which engage the nose of a trailing projectile in the stack. Projectiles may be withdrawn from barrel and unclipped as required by the user.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: April 23, 2013
    Assignee: Metal Storm Limited
    Inventors: Joseph F. Cronin, Sean P. O'Dwyer, Roger H. Thompson
  • Patent number: 8171854
    Abstract: A cartridge (1) is provided comprising a cartridge case (2) and a projectile arrangement (3; 3?) with an arrow projectile (5; 5?) with a sub-caliber control unit (7), wherein the projectile arrangement (3; 3?) is connected to the cartridge case (2) via a case cover (4), wherein, after firing of the projectile arrangement (3; 3?), a precise guiding of the arrow projectile (5; 5?) in the corresponding weapon barrel is ensured due to a receptacle device (28; 28?) that centers the control unit (7) of the arrow projectile (5; 5?), and that can be separated from the control unit (7) when the projectile arrangement (3; 3?) is fired. The receptacle device is connected to the case cover (4) on the projectile side, wherein the receptacle device grasps a ring-shaped rear flange (29; 29?) whose outer diameter corresponds to the projectile caliber of the respective cartridge (1).
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: May 8, 2012
    Assignee: Rheinmetall Waffe Munition GmbH
    Inventors: Thomas Heitmann, Christian Baumann
  • Patent number: 8161886
    Abstract: A sabot-retaining shotshell cartridge and firing assembly including a barrel or barrel insert for firing the sabot-retaining shotshell cartridge. The shotshell cartridge includes a cylindrical hull, a sub-caliber projectile, a propellant charge, and a sabot. A central pathway or thin membrane is defined within the base of the sabot between the sub-caliber projectile and propellant charge. The barrel or barrel insert for firing the cartridge includes a transitional area between chamber and sub-caliber rifled bore to retain sabot in the cartridge. Upon cartridge firing, propellant gases flow through central portion of sabot base propelling projectile out of the sabot and into sub-caliber rifled bore.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: April 24, 2012
    Assignee: Olin Corporation
    Inventor: Stephen W. Meyer
  • Patent number: 8109212
    Abstract: A projectile (10) is for use with barrel assemblies of the type having a plurality of projectiles axially disposed within a barrel having a bore and a muzzle and which projectiles are associated with discrete propellant charges for propelling said projectiles sequentially through the muzzle of the barrel. Projectile (10) comprises expandable sleeve (11) encircling at least part of core (12). Sleeve (11) and core (12) have wedging surfaces (14) operable to deform trailing part (21) of sleeve (11) into sealing engagement with the bore in response to pressure exerted on the projectile (10). When projectiles (10) are axially disposed in the bore, rear face (24) of the leading projectile cooperates with leading face (20) of the trailing projectile to define a discrete space about spine (23) for receipt of the propellant charge. Sleeve (11) is retained about the core (12) during travel to the target.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: February 7, 2012
    Assignee: Metal Storm Limited
    Inventor: James Michael O'Dwyer
  • Patent number: 7958829
    Abstract: A sabot with exactly two complimentary halves, wherein each half portion comprises teeth configured to interlock with teeth of the other half portion. The sabot may further comprise a semi-circular groove configured in the teeth of each half portion. Also, each half portion may comprise at least one indented conical end. Preferably, on each half portion, the teeth are spaced apart from the at least one indented conical end. Moreover, each half portion may comprise translucent polycarbonate material. Furthermore, each half portion may be adapted to flush mount together to form a substantially cylindrical configuration when the teeth are interlocked. Additionally, the sabot may further comprise a semi-circular groove configured in the teeth of each half portion, wherein the semi-circular groove extends to the at least one indented conical end.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: June 14, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ricky G. Kane, Mark T Ward
  • Publication number: 20100139518
    Abstract: The invention relates to a projectile (1) having a sub-caliber projectile core (2) and a guide cage or sabot (3) that comprises a driving element (4), which acts on the projectile core (2) at the rear thereof and is in the form of a plate composed of metal. In order to produce such a projectile (1) at low cost, the projectile core (2) and the driving element (4), which is in the form of a plate, are inserted as inserts into an injection-molding tool, and are extrusion-coated so that the injection-mold shape is chosen so that the contour of the guide cage or sabot (3) of the projectile (1) is produced after the injection-molding process.
    Type: Application
    Filed: July 25, 2008
    Publication date: June 10, 2010
    Applicant: Rheinmetall Waffe Munition GmbH
    Inventors: Christian Baumann, Holger Brase, Thomas Heitmann, Michael Vagedes
  • Publication number: 20100126370
    Abstract: A projectile (10) is for use with barrel assemblies of the type having a plurality of projectiles axially disposed within a barrel having a bore and a muzzle and which projectiles are associated with discrete propellant charges for propelling said projectiles sequentially through the muzzle of the barrel. Projectile (10) comprises expandable sleeve (11) encircling at least part of core (12). Sleeve (11) and core (12) have wedging surfaces (14) operable to deform trailing part (21) of sleeve (11) into sealing engagement with the bore in response to pressure exerted on the projectile (10). When projectiles (10) are axially disposed in the bore, rear face (24) of the leading projectile cooperates with leading face (20) of the trailing projectile to define a discrete space about spine (23) for receipt of the propellant charge. Sleeve (11) is retained about the core (12) during travel to the target.
    Type: Application
    Filed: November 20, 2009
    Publication date: May 27, 2010
    Applicant: METAL STORM LIMITED
    Inventor: James Michael O'Dwyer
  • Publication number: 20100077934
    Abstract: A shell with a subcaliber penetrator, which has a conical tailpiece, and with a basically disk-shaped propulsion element, wherein the conical tailpiece has a frustum-shaped recess that is open towards the rear end. The propulsion element is joined with the penetrator, preferably by a screw connection (projectile fastening bolt. To this end, a bolt element joins the propulsion element and the penetrator in the area of the tailpiece and has a borehole that is open at the rear end, into which propellant charge gases flow when the shell is fired and cause rending of the bolt element and thus separation of the propulsion element from the penetrator.
    Type: Application
    Filed: September 25, 2009
    Publication date: April 1, 2010
    Applicant: RHEINMETALL WAFFE MUNITION GMBH
    Inventors: Thomas HEITMANN, Klaus-Dieter FREUDENTHAL, Michael VAGEDES
  • Patent number: 7594472
    Abstract: A sabot 7 having a rearward end and a central longitudinal channel 1 which is engageable with projectile 33 has an anisotropic compressive strength distribution such that on individual radial planes the compressive strength in a first principal material direction P1 radiates from the central channel 1 towards the rearward end of the sabot. This permits a more even distribution of force at the interface between the sabot and the penetrator. The sabot may be constructed from a fibre reinforced plastic composite, containing a single or a double array of fibres.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: September 29, 2009
    Assignee: QinetiQ Limited
    Inventors: Noel J. Parratt, John Cook, Nicholas Savage, Michael J. Hinton
  • Patent number: 7451706
    Abstract: A sabot-retaining shotshell cartridge and firing assembly including a barrel or barrel insert for firing the sabot-retaining shotshell cartridge. The shotshell cartridge includes a cylindrical hull, a sub-caliber projectile, a propellant charge, and a sabot. A central pathway or thin membrane is defined within the base of the sabot between the sub-caliber projectile and propellant charge. The barrel or barrel insert for firing the cartridge includes a transitional area between chamber and sub-caliber rifled bore to retain sabot in the cartridge. Upon cartridge firing, propellant gases flow through central portion of sabot base propelling projectile out of the sabot and into sub-caliber rifled bore.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: November 18, 2008
    Assignee: Olin Corporation
    Inventor: Stephen W. Meyer
  • Patent number: 7210412
    Abstract: Projectile (10) is for use with barrel assemblies of the type having a plurality of axially disposed projectiles within a bore and wherein discrete propellant charges are provided for propelling respective projectiles sequentially from the bore. Projectile (10) comprises expandable sleeve (11) encircling at least part of core (12). Sleeve (11) and core (12) have wedging surfaces (14) operable to deform trailing part (21) of sleeve (11) into sealing engagement with the bore in response to pressures exerted on projectile (10). When projectiles (10) are axially disposed in the bore, rear face (24) of the leading projectile cooperates with leading face (20) of the trailing projectile to define a discrete space about spine (23) for receipt of the propellant charge. Sleeve (11) is retained about core (12) during travel to the target.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: May 1, 2007
    Assignee: Metal Storm Limited
    Inventor: James Michael O'Dwyer
  • Patent number: 7089866
    Abstract: A projectile (1) for a small arms weapon having a muzzle, the projectile having a casing (2) and fins (3), pivotally mounted upon said casing and urged outwardly of the casing, for automatic deployment after leaving the muzzle; wherein the casing is disposed within a cartridge having a sleeve surrounding the casing and fins; the cartridge also containing a propellant charge intended, when detonated, to propel the projectile out of the muzzle; and wherein shielding means (6) is provided to shield said fins and/or their pivotal mountings, at least in part, from the detonation of said propellant.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: August 15, 2006
    Assignee: Olympic Technologies Limited
    Inventors: Michael Alculumbre, Fred Sharp
  • Patent number: 7013811
    Abstract: An energetic sabot allows part of the sabot to burn away at a controlled rate, adding propellant energy to the gun while at the same time completely support the projectile rod. The energetic sabot is thicker or larger at shot start to support the projectile without breaking. As the energetic sabot travels up the gun tube, the energetic sabot then thins out or otherwise decreases in mass as the force on the energetic sabot decreases. The weight of the projectile consequently decreases as it travels up the gun tube, allowing the gun gases to push a lighter projectile, giving the projectile a higher velocity. Due to its continually decreasing weight in the gun tube, the projectile experiences greater acceleration and exits the gun with a higher muzzle velocity. A secondary effect comes from increased pressure in the gun tube from the gases relinquished in the burning of the sabot, further increasing the velocity of the projectile.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: March 21, 2006
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Anthony Sebasto, Stewart Gilman, Leon Manole, Mohan Palathingal, Robert Marchak
  • Patent number: 6805058
    Abstract: The invention relates to a sabot for fin-stabilized ammunition composed of segments assembled around a sub-calibrated penetrator. The sabot is characterized in that it includes at least three longitudinal bars of a substantially constant width, each having indentations co-operating with an external profile of the penetrator to allow it to be driven, as well as a calibrated thrust plate integral with the bars. Application to projectile firings.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: October 19, 2004
    Assignee: GIAT Industries
    Inventors: Nicolas Eches, Jacques Bachelier, Joël Leblond, Jean-Paul Fauchon, Dominique Dion
  • Patent number: 6799519
    Abstract: A plastic, cup-shaped, multi-petal sabot housing a sub-caliber projectile for use such as in shotgun cartridges. The sabot engages the rifling of the shotgun barrel and transfers the spin to the projectile. A reinforcement disk is advantageously at least partially embedded in a sabot base and has a central aperture and a plurality of additional apertures. Sabot base material extends through the additional apertures. Advantageously, in its relaxed condition, each sabot petal includes a protrusion from its inboard surface for engaging a projectile ogive. The protrusion and its contact area with the projectile are fractions of the local petal width.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: October 5, 2004
    Assignee: Olin Corporation
    Inventors: Stephen W. Meyer, Robert J. Gardner, Gerald T. Eberhart
  • Patent number: 6647890
    Abstract: A self-contained round of ammunition has a cartridge casing including a tubular body defining a cylindrical rifled bore and a base threadably attached to the casing body and forming a closure for a breech end of the rifled bore. A sabot which carries a ring airfoil projectile is constrained for limited axial movement within and relative to the bore from a loaded position adjacent the base to a fired position wherein an annular arresting lip integrally formed at the muzzle end of the cartridge body engages an annular abutment surface on the sabot. The lip defines a cylindrical muzzle opening having a diameter smaller than the diameter of the bore and larger than the major diameter of the projectile which may pass freely there through. The sabot in its loaded position cooperates with the base to form a pressure chamber therebetween for receiving gasses of explosion generated by a powder charge contained within the base and in communication with a primer mounted in the base.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: November 18, 2003
    Assignee: Guilford Engineering Associates, Inc.
    Inventor: David Findlay
  • Publication number: 20030145756
    Abstract: The invention relates to a sabot for fin-stabilized ammunition composed of segments assembled around a sub-calibrated penetrator. The sabot is characterized in that it comprises at least three longitudinal bars of a substantially constant width, each having indentations cooperating with an external profile of the penetrator to allow it to be driven, as well as a calibrated thrust plate integral with the bars.
    Type: Application
    Filed: February 4, 2003
    Publication date: August 7, 2003
    Applicant: GIAT Industries
    Inventors: Nicolas Eches, Jacques Bachelier, Joel Leblond, Jean-Paul Fauchon, Dominique Dion
  • Patent number: 6598536
    Abstract: A sabot projectile (10), comprising a sabot (12) and a shattering penetrator (14) arranged in the sabot (12). The shattering penetrator (14) has a penetrator casing (20), which can be broken into at least two casing portions (22*, 24*) upon impact of the shattering penetrator (14), to which end a predetermined casing breaking area (23*) is respectively arranged between two adjoining casing portions (22*, 24*). A central conduit (30) is arranged in the penetrator casing (20), in which a penetrator core (26) is received, whose core tip element (26.4) projects out of the penetrator casing (20) and constitutes a penetrator tip. The plastic material forming the penetrator core (26) is introduced into the conduit in a flowable state. The penetrator casing (20) is secured against break-up into the casing portions (22*, 24*) by the penetrator core (26).
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: July 29, 2003
    Assignee: Oerlikon Contraves Pyrotec AG
    Inventor: Jakob Burri
  • Publication number: 20030127014
    Abstract: Projectile (10) is for use with barrel assemblies of the type having a plurality of axially disposed projectiles within a bore and wherein discrete propellant charges are provided for propelling respective projectiles sequentially from the bore. Projectile (10) comprises expandable sleeve (11) encircling at least part of core (12). Sleeve (11) and core (12) have wedging surfaces (14) operable to deform trailing part (21) of sleeve (11) into sealing engagement with the bore in response to pressures exerted on projectile (10). When projectiles (10) are axially disposed in the bore, rear face (24) of the leading projectile cooperates with leading face (20) of the trailing projectile to define a discrete space about spine (23) for receipt of the propellant charge. Sleeve (11) is retained about core (12) during travel to the target.
    Type: Application
    Filed: November 8, 2002
    Publication date: July 10, 2003
    Inventor: James Michael O'Dywer
  • Publication number: 20030033953
    Abstract: A cartridge with a propellant case (4) that contains a propellant charge (3) and an electrothermal ignition device, wherein several ignition channels (9) are provided in the charge (3), and extend axial-symmetrical in the direction of longitudinal axis (8) of cartridge (1), with each channel comprising a propellant tube (10) and an electrically conducting layer (11). To achieve a uniform and symmetrical ignition of the cartridge (1) in the chamber of the respective weapon, electric arcs (21) that form during the ignition operation in the ignition channels (9), are decoupled in that the electrically conducting layer (11) is composed of successively connected rhombi or other shapes (circles, ovals, etc.)that electrically function as decoupling resistances. When current flows through such a structure, the current bridges (20) arranged in the current-flow direction between the individual rhombi (15) etc. initially break apart explosively.
    Type: Application
    Filed: August 19, 2002
    Publication date: February 20, 2003
    Inventors: Hans-Karl Haak, Alexei Voronov
  • Publication number: 20010047736
    Abstract: A cartridge ammunition includes a cartridge case having a front and a rear; a projectile inserted into the cartridge case at its front and extending into the cartridge case; an igniter provided in the rear of the cartridge case; and a propellant charge accommodated in the cartridge case. The propellant charge is formed of a compacted bulk propellant powder having a density of between 0.9 and 1.2 g/cm3.
    Type: Application
    Filed: July 13, 2001
    Publication date: December 6, 2001
    Applicant: Rheinmetall W & M GmbH, Heinrich-Ehrhardt-Strasse
    Inventor: Stefan Thiesen
  • Patent number: 6125764
    Abstract: A simplified tailored composite architecture for use in fabricating a composite sabot where the composite sabots are fabricated from a number of wedge kits. The resultant composite sabot includes a front scoop having a scoop angle. The simplified tailored composite architecture includes a panel adapted to be formed into a wedge kit. The panel has a number of plies of prepreg materials oriented in a number of different directions, where one of the number of different directions includes the direction of dominant homogeneous fiber orientation. A pattern within the panel includes selected prepreg segments rotated so that the direction of dominant homogeneous fiber orientation in the selected prepreg segments is aligned to be substantially parallel to the at least one dominant scoop fiber orientation when the panel is subsequently formed into a wedge kit.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: October 3, 2000
    Assignee: Alliant Tech Systems Inc.
    Inventor: Dipak S. Kamdar
  • Patent number: 6105506
    Abstract: A sabot bullet having a jacket bullet body and a nonrotable sabot segments. The jacketed bullet has forward end portion, torso, and rear end portion. The forward end portion is constructed of multi-metals, having a tapered nose, hollow point with grooves to aid in the expansion. The torso is of solid single metal with outward tabs, which relates the slug when the sabot's external surface comes in contact with the rifling in the gun barrel. The rear portion a single metal with a rear cavity to reduce the over all weight and increase the ratio to the forward portion of bullet. A bullet embodiment with external rifling and an armor piecing sabot round is also disclosed.
    Type: Grant
    Filed: September 23, 1997
    Date of Patent: August 22, 2000
    Assignee: Antonio C. Gangale
    Inventor: Antonio C. Gangale
  • Patent number: 5992291
    Abstract: The present invention relates to weapon systems that accelerate projectiles using gases generated by the rapid combustion of a solid propellant, in particular, such a weapon system is able to vary the barrel exiting velocity of the projectile through a barrel venting means. In one embodiment, a front venting means exhausts gas generated by combusting propellant from behind the accelerating projectile and redirects a portion of the exhausted gas either to at least one fixed volume, to the front of the projectile, or to a combination of at least one fixed volume and to the front of the projectile. Redirecting some of the exhausted gas to the front of the projectile restrains the projectile, thereby slowing the projectile, and thus further decreasing the muzzle velocity of the projectile. In another embodiment, gas from behind the projectile is exhausted into a fixed volume, thereby decreasing projectile acceleration, and thus, the muzzle velocity of the projectile.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: November 30, 1999
    Inventors: Jeffrey Michael Widder, Roger Allen Sherman, Steven Vance Medlin
  • Patent number: 5834682
    Abstract: A 12-gauge emergency radar rescue signal cartridge comprises bundles of high density chaff tuned to I-Band frequencies of 8-10 GH.sub.z and packaged in a projectile housed within a 12-gauge 3.0-3.5 inch magnum shot shell. The projectile is deployed to a desired altitude by a propellant charge contained within the base of the shell. The base propellant ignites a pyrotechnic delay train carried by the projectile which allows the projectile to reach apogee geometry before the chaff material is expelled to form a radar reflecting cloud. The cartridge may also be employed to facilitate radar observation of low altitude wind conditions.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: November 10, 1998
    Inventor: Cyrus E. Warren
  • Patent number: 5744748
    Abstract: A projectile includes a mechanism which allows the fin position to be reved after the projectile leaves the launch tube thus allowing the fins to have reversed leading edges, which avoids the costly weight of the one-piece design in the prior art, which is a parasitic weight that will result in a lower velocity, and consequently lower kinetic energy, from the same propellant charge. This mechanism also avoids having extra pieces falling from the muzzle and near the firing team or troops near the gun, and has the advantage of a simple, low-weight deployment mechanism which results in the least aerodynamic resistance after full deployment. The mechanism has at least one small winglet on each reversible fin which generates an aerodynamic lifting force to provide reversal of the fin after the projectile leaves the launch tube. These winglets are positioned and designed to cause the least increase in aerodynamic drag.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: April 28, 1998
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Ameer G. Mikhail
  • Patent number: 5668347
    Abstract: A projectile includes a mechanism which allows the fin position to be reved after the projectile leaves the launch tube thus allowing the fins to have reversed leading edges, which avoids the costly weight of the one-piece design in the prior art, which is a parasitic weight that will result in a lower velocity, and consequently lower kinetic energy, from the same propellant charge. This mechanism also avoids having extra pieces falling from the muzzle and near the firing team or troops near the gun, and has the advantage of a simple, low-weight deployment mechanism which results in the least aerodynamic resistance after full deployment. The mechanism has at least one small winglet on each reversible fin which generates an aerodynamic lifting force to provide reversal of the fin after the projectile leaves the launch tube. These winglets are positioned and designed to cause the least increase in aerodynamic drag.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: September 16, 1997
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Ameer G. Mikhail
  • Patent number: 5481981
    Abstract: A sabot for a subcaliber projectile, preferably an arrow projectile, having an essentially cylindrical guide gage (8) of a lightweight material and a tail-side drive element (14) detachably connected thereto for tail-side support of the projectile body (1). The guide cage (8) has a radially inwardly-extending support wall (12) for supporting a projectile body (1) disposed therein in its forward to central region, and the drive element is a propelling disk (14) that is received by a circumferential or annular groove (13) in the tail region of the guide cage (8), which is segmented in the axial direction of the projectile body (1). As a result, a further reduction in weight can be accomplished with simpler fragmenting of the sabot that practically does not impair the projectile at all.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: January 9, 1996
    Assignee: Rheinmetall GmbH
    Inventors: Achim Sippel, Thomas Heitmann, Willhelm Becker, Klaus Unterstein, Jurgen Leeker, Walter Simon
  • Patent number: 5404816
    Abstract: A releasable sabot for a subcaliber projectile. A relatively large danger zone exists for troops in which they can be injured by sabot splinters during the firing of subcaliber projectiles, with the releasable sabots, from a helically grooved weapon barrel, and in order to minimize this danger zone, the sabot of this invention is of a one piece plastic material construction and includes longitudinal slots and cooperative fracture point locations, wherein the longitudinal slots extend continuously from the sabot front end to the gastight region of the driving band, with the longitudinal slots, in cross section, having enlargements in the slot base regions.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: April 11, 1995
    Assignee: Oerlikon-Contraves Pyrotec AG
    Inventor: Jakob Burri
  • Patent number: 5277096
    Abstract: A cartridge assembly for propelling a subcaliber penetrator through a gun tube which has a portion of the propellant charge contained in an annular cavity surrounding the sabot is disclosed. The annular cavity is defined by the scoop shaped front bourrelet, the aft bourrelet which has three radially extending support posts and bore riding shoes, and a combustible tubular case extension over the aft bourrelet extending forward to the front bourrelet. The assembly includes cartridge case having a multistrand ignition system having a plurality of flexible combustible ignition strand. The strands extend through the propellant charge in the case and extend between the posts of the aft bourrelet into the annular cavity to simultaneously ignite the propellant charge contained therein with the portion of the charge in the cartridge case.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: January 11, 1994
    Assignee: Olin Corporation
    Inventors: Ralph F. Campoli, John T. McGovern
  • Patent number: 5237904
    Abstract: A non-transitioning armature/projectile for launching from a single or multi-turn rail gun including: a nose; a tail; and a current carrying section between the nose and the tail including current channeling means for reducing the current concentration in the tail end of the armature/projectile and distributing the current toward the nose for generally balancing the electrically induced driving force with the inertial force and substantially reducing internal stress in the section.
    Type: Grant
    Filed: January 5, 1988
    Date of Patent: August 24, 1993
    Inventor: Doris Kuhlmann-Wilsdorf
  • Patent number: 5221809
    Abstract: The invention relates to a non-lethal projectile of small mass for military or police use adapted to be fired from a standard launcher which projectile either increases in size during flight or at impact to spread the force over a large area to provide a knock-down-effect without body penetration.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: June 22, 1993
    Inventor: Jaime H. Cuadros
  • Patent number: 5182419
    Abstract: A saboted projectile comprises a sub-caliber, spin-stabilized warhead (usually an armor-piercing penetrator) and a full caliber spin-stabilized non-disintegrating sabot capable of being fired by airplanes. The sabot releasably receives the armor-piercing penetrator and is adapted to be mounted on a conventional ammunition cartridge. The sabot includes a novel method of holding the penetrator until firing, tightening a reverse threaded end cap against the aft end of the penetrator during firing and utilizing interior end cap geometry to utilize firing gas pressure to accelerate the penetrator forward in relation to the sabot after leaving the gun barrel. Accuracy is increased by maintaining axial symmetry and releasing the penetrator in substantially the same way each time. There are other novel features.
    Type: Grant
    Filed: February 19, 1986
    Date of Patent: January 26, 1993
    Assignee: ASI Systems International
    Inventor: James E. Burnette
  • 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: 5133242
    Abstract: An electromagnetic rail accelerator in which a plurality of plasma arc cushions are generated between a plurality of pairs of rails in order to accelerate projectiles. To prevent currents of different intensities from flowing through the individual plasma armatures and, thus subjecting the rails to relatively great wear, the number of rail pairs is made equal to the number of zones in which plasma arc cushions are formed. Preferably, the rail accelerator is composed of a rail arrangement in multiples of three, with the rails being disposed in or on the inner surface of a cylindrical tube of insulating material and with the current flowing in opposite directions in adjacent rails.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: July 28, 1992
    Assignee: Rheinmetall GmbH
    Inventor: Wolfram Witt
  • Patent number: 5103736
    Abstract: A sabot is provided which is composed of a plurality of sabot segments which engage and form a shell surrounding a bullet of improved configuration. The inner surface of each sabot segment matches and is complimentary to the adjacent outer surface portions of the bullet body. The bullet body has a pair of axially aligned conical parts adjacent to and spaced apart from each other, each conical part increasing in diameter as the conical part extends away from the other conical part. Between the conical parts, the bullet has an extended central portion serving to separate and interconnect the conical parts.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: April 14, 1992
    Assignee: Olin Corporation
    Inventor: Robert P. Sowash
  • Patent number: 5052305
    Abstract: The technical field of the invention is that of spin-stabilized subcaliber rojectiles including a core integral with a sabot, and a sleeve.The sleeve includes a rear annular area lodged in a corresponding groove in the sabot and providing gastightness, wherein:the sabot includes, toward the front of the projectile, a cylindrical crown having an edge bordering the band groove;the crown includes at least three notches, separated by castellations, and extending axially at least to the band groove;the sleeve follows a profile complementary to that of the sabot, so that it enters into the notches;and the projectile possesses means for separating the sleeve into several sectors under the effect of the centrifugal force, at the time the projectile leaves the gun muzzle.Application to medium-caliber ammunition.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: October 1, 1991
    Assignee: L'Etat Francais represente par le Delegue Ministeriel pour l'Armement
    Inventors: Francois A. Chiarelli, Jean-Louis Chazeirat, Jean-Pierre Boisnard
  • Patent number: 5014624
    Abstract: A sabot for use with a spin stabilized projectile comprises a closed front end portion having lines or strips of weakness running along sides of the sabot which meet at a front end surface of the sabot, thereby providing a continuously extending line or region of weakness across the front end surface.Preferably, the sabot front end portion has at least three, desirably four or more, lines or strips of weakness running along the length of the front end portion. These lines or strips may meet at an intersection of lines or strips at the front end surface, but they preferably meet at a front end membrane region.Discarding sabots according to the present invention are especially suitable for use with tubular projectiles. These projectiles may for example be used in training ammunition rounds which are suitable for firing from the UK 30 mm RARDEN (UK Registered Trade Mark) Gun.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: May 14, 1991
    Assignee: Royal Ordnance plc
    Inventors: James E. Baxter, Robert D. Poole
  • Patent number: 5012744
    Abstract: A sabot bullet having a bullet body with an improved configuration in the area at which the two conical parts of the bullet body are joined. A connecting part is provided between the parts which extend longitudinally of the bullet body and is integral with the adjacent ends of the conical parts. In a first embodiment, the connecting part is a cylindrical connecting member integral at its ends with the conical parts. In a second embodiment, the connecting part is an annular, solid extension having a traversely concave outer surface; thus, the extension represents a gradual change in the outer surface of the bullet body from one conical part to the other conical part. An improved sabot segment has ribs on the outer surface thereof. These ribs allow the sabot segment to be compressed or to yield when the sabot bullet is fired from a gun. The ribs extend longitudinally of the sabot segments and are preferably transversely semi-circular. End bands can also be provided with the ribs.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: May 7, 1991
    Assignee: Olin Corporation
    Inventor: Robert P. Sowash
  • Patent number: 4982669
    Abstract: A subcaliber, spin stabilized, discarding sabot projectile of the type including a projectile body, with a conically tapered tip, and a discardable sabot which completely encloses said projectile body and includes a base portion and a plastic hood portion connected to the base portion, and with the hood portion having an inner conical surface which contacts at least a portion of the conically tapered tip of the projectile body and being provided, on its circumferential surface, with a plurality of symmetrically disposed grooves which extend in the longitudinal direction of said projectile and form desired break locations along which the hood portion tears open into a plurality of segments after firing from a weapon and after the projectile has left the weapon muzzle.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: January 8, 1991
    Assignee: Rheinmetall GmbH
    Inventors: Bernhard Bisping, Michael Vagedes, Siegfried Kessler
  • Patent number: 4982647
    Abstract: A method and apparatus for supersonically accelerating a projectile in a thermally choked subsonic combustion mode. A projectile (50) is initially preaccelerated using either a tank (24) of compressed helium or a chemical propellant charge preaccelerator (152). The projectile enters a portion of a tube (22) filled with a combustible mixture (54) of a gaseous fuel and an oxidizer and is propelled by a ram acceleration process as the mixture burns. In several different embodiments, various devices are used to control the velocity of a shock wave generated as the projectile enters the combustible mixture and the dynamic impulse pressure immediately behind the projectile, so that the shock wave attaches to the projectile along an aft portion, thereby establishing a stable subsonic combustion zone along the aft end (64) of the projectile, in which combustion of the gaseous fuel accelerates the projectile down the bore of the tube.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: January 8, 1991
    Assignee: Washington Research Foundation
    Inventors: Abraham Hertzberg, Adam P. Bruckner, David W. Bogdanoff, Carl Knowlen
  • Patent number: 4901646
    Abstract: The invention concerns a fin-stabilized discarding sabot projectile for employment from a rifled barrel and is particularly suitable for automatic cannons having calibers from 12.7 to 70 millimeters. The full rate of spin commensurate with the rifling twist of a specific barrel and the muzzle velocity is imparted to the projectile during launch using a rotating band which is fixed and an integral component of the discarding sabot. The discarding sabot design involves the in-place injection molding of the sabot body, including a seal with obturator, onto the fin-stabilized projectile. The absence of slipping rotating band provides for a rugged sabot configuration which is particularly important for ammunition employed from automatic cannons. Launching at full rate of spin results in large centrifugal forces acting on the components of the sabot which provides for instantaneous and precise sabot separation upon projectile exit from the muzzle.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: February 20, 1990
    Assignee: Pacific Armatechnica Corporation
    Inventors: Fritz K. Feldmann, Paul J. Griffith, Craig L. Christenson
  • Patent number: 4882997
    Abstract: A tubular projectile suitable for use in training ammunition comprises a hollow tube having formed in the rear end of the tubular wall thereof a recess in which is embedded a tracer material.The projectile may be sabot launched.Constructions are described for igniting the tracer material directly or indirectly from the gases produced by burning of the main propellant charge when the projectile is fired from a gun, e.g. the RARDEN Gun of the Applicants.Example of suitable tracter materials and techniques for filling the said recess with them are also described.
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: November 28, 1989
    Assignee: Royal Ordnance plc
    Inventors: James E. Baxter, Robert D. Poole