Structurally Weakened Casing Patents (Class 102/493)
  • Patent number: 10648783
    Abstract: The invention relates to a projectile (1), which has a projectile body (2) featuring a recess (5) for receiving an explosive, wherein the projectile body (2) has a rotation-symmetrical shell surface (7), at least in sections, which is surrounded, at least in sections, by several ring-shaped elements (8) provided with predetermined break points, wherein fragments (12) formed upon breakup of the elements (8) are predefined via the predetermined break points, said fragments (12) being connected to one another in a ring-shaped connecting portion (11) for forming the ring-shaped element (8), and the freely projecting ends (13) of the fragments (12) being at least partially arranged in a common orthogonal plane (13?) to a longitudinal axis (8?) of the ring-shaped element (8), wherein this orthogonal plane (13?) is arranged diverging from an orthogonal plane (11?) defined by the ring-shaped connecting portion (11), as well as to a corresponding ring-shaped element (8) for the projectile (1).
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: May 12, 2020
    Assignee: Hirtenberger Defence Europe GmbH
    Inventors: Peter Pichler, Christian Müller, Martin Emsenhuber, Bernhard Mayer
  • Patent number: 10627198
    Abstract: A fragmentation warhead is provided, capable of being mounted in a carrier vehicle, the warhead having a longitudinal axis. In at least one example the warhead includes a shell that extends along the longitudinal axis. The shell includes a fixed shell portion and a fragmentation portion, and defines therebetween a cavity for accommodating therein an explosive charge. The fragmentation portion includes at least one set of serially adjacent fragments in correspondingly serially contiguous relationship in the fragmentation portion and in generally helical relationship with respect to the longitudinal axis. A corresponding carrier vehicle and a corresponding missile are also provided.
    Type: Grant
    Filed: January 1, 2015
    Date of Patent: April 21, 2020
    Assignee: ISRAEL AEROSPACE INDUSTRIES LTD.
    Inventor: Jacob Rovinsky
  • Patent number: 9816793
    Abstract: A munition, such as a warhead, includes a penetrator casing for penetrating hard targets, such as a fortification or inforced building or other structure, with the penetrator casing having reduced-thickness portions. The munition also includes a shock-resistant fuzewell for absorbing shocks during the penetration, to allow a fuze within the fuzewell to survive hard target penetration. The fuzewell may have one or more shock-absorbing features, such as having a ring surrounding a central housing, with flexible spokes connecting the ring to the central housing. The shock-absorbing features may allow the fuze to withstand the penetration into a hard target, with the fuze subsequently being used to detonate an explosive of the munition.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: November 14, 2017
    Assignee: Raytheon Company
    Inventors: George D. Budy, Wayne Y. Lee, Jesse T. Waddell
  • Patent number: 9738948
    Abstract: Apparatus and methods associated with an enclosure or structure including two sections that are adapted with a snap-fit interlocking structure. Various embodiments of the enclosure or structures are formed with various case hardening or embrittlement processes to increase embrittlement or hardness of the enclosure or structure so as to create a structure or enclosure which has a desired fragmentation capacity while still maintaining sufficient material properties to permit snap-fit insertion of one section into another section and withstand substantial impacts. Embodiments also provide an interlocking structure that minimizes differences in fragmentation or fracturing capacity as contrasted with other portions of the structure or enclosure. An embodiment of the invention includes an enclosure where one section of the enclosure or structure has a first thickness and the second section has a second thickness, wherein the first and second thicknesses are different.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: August 22, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Josh Gwaltney, Lucas Allison, Eric Scheid, Nishkamraj Deshpande, Alan Wolf, Eddie Schisler
  • Patent number: 9738947
    Abstract: A method of modifying material properties of a fragmentation device, includes providing a fragmentation device with a first surface, a first section, a second section, a second surface spaced apart from the first surface, a third section, and a fourth section disposed between the first, second, and third sections. The method further includes positioning the fragmentation device within a carbon-rich environment, and absorbing carbon from the carbon-rich environment into the first and second surfaces of the fragmentation device. Additionally, the method further includes increasing a content of carbon at the first and second surfaces of 0.06 wt. % carbon to 1.0 wt. % carbon and maintaining an original content of carbon of 0.01 wt. % carbon to 0.05 wt. % carbon at the fourth section of the fragmentation device by controlling penetration of the carbon into the fourth section.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: August 22, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Nishkamraj U. Deshpande, Eric Scheid, James E. Schwabe
  • Patent number: 9689648
    Abstract: A large caliber, frangible, training projectile imitates, for training purposes, the corresponding tactical projectile. To enable fragmentation of the training projectile at impact, some embodiments of the frangible projectile are partially or entirely made of a material with a lower yield strength than the material used in the counterpart tactical projectile. Some embodiments of the frangible projectile may include portions that are sectioned, welded, or provided with stress risers. Some embodiments of the frangible projectile may include high density particles suspended in a weaker medium. The fragmentation methods may be applied to the overall mass of the projectile, or to a portion of the projectile.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: June 27, 2017
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: John F. Kostka, Luis M. Lavrador
  • Patent number: 9568291
    Abstract: A fragmentable projectile casing for an explosive projectile (7) has an irregular wall thickness (W) and predetermined breaking points (2) distributed over the projectile casing (1) for formation of fragments. The predetermined breaking points (2) for obtaining uniform fragments are spaced irregularly from one another. The predetermined breaking points (2) can have a smaller distance from one another in a region of greater wall thickness (W) and can be arranged in the manner of a grid and/or are formed as lines. Further, the predetermined breaking points (2) can run parallel to a longitudinal axis (L) of the projectile casing (1) and/or along a circumference (U) of the projectile casing (1).
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: February 14, 2017
    Assignee: KRAUSS-MAFFEI WEGMANN GMBH & CO. KG
    Inventors: Alexander Simon, Ernst Tripp
  • Patent number: 9303966
    Abstract: An initiation distributor includes two plates coupled in a spaced-apart fashion. Each plate includes detonation transfer holes. A face of one plate has a depression and defined channels leading from the depression to the plate's detonation transfer holes, and has a detonation transfer port located in line with a plate's channels. The second plate has a detonation transfer port, and channels defined in its face that lead from the plate's detonation transfer port to its detonation transfer holes. Each of one plate's detonation transfer holes can be aligned with one of the second plate's detonation holes. A conduit couples the detonation transfer ports in the two plates with a pathway defined between the depression and each of the plates' detonation transfer holes. Explosive material fills the depression, all channels, all detonation transfer holes, all detonation transfer ports, and the conduit.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: April 5, 2016
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Daniel Lanterman, Mary Sherlock, George Shane Rolfe, Taylor Young
  • Patent number: 8955443
    Abstract: A cylindrical warhead is divided into a conical central segment and peripheral segments. The central segment has a disk-shaped liner bounding a cavity with high explosive and forming a penetrating projectile. The peripheral segments are hingedly attached to the central segment and have outer segment faces bounding respective cavities with high explosive, the segment faces forming sidewalls of the warhead in a closed position. The peripheral segments can be released to an open position in which the segment faces point in the forward direction for detonation. The warhead may be used in the closed position for single hardened targets such as armored vehicles and in the open position for area targets such as lighter vehicles and personnel. Opening of the warhead may be enabled at a time of launch of the warhead, or at a time of target acquisition after launch.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: February 17, 2015
    Assignee: Textron Systems Corporation
    Inventor: Clayton W. Miller
  • Publication number: 20140182474
    Abstract: A fragmentation body comprising a substantially monolithic structure comprising a metal material and comprising a major surface having an indentation pattern therein, and an opposing major surface having an opposing indentation pattern therein, the opposing indentation pattern being substantially aligned with the indentation pattern. A warhead and an article of ordnance are also described.
    Type: Application
    Filed: July 17, 2012
    Publication date: July 3, 2014
    Applicant: ALLIANT TECHSYSTEMS INC.
    Inventors: James D. Dunaway, John E. Bott
  • Publication number: 20130255524
    Abstract: A fragmentable projectile casing for an explosive projectile (7) has an irregular wall thickness (W) and predetermined breaking points (2) distributed over the projectile casing (1) for formation of fragments. The predetermined breaking points (2) for obtaining uniform fragments are spaced irregularly from one another. The predetermined breaking points (2) can have a smaller distance from one another in a region of greater wall thickness (W) and can be arranged in the manner of a grid and/or are formed as lines. Further, the predetermined breaking points (2) can run parallel to a longitudinal axis (L) of the projectile casing (1) and/or along a circumference (U) of the projectile casing (1).
    Type: Application
    Filed: December 2, 2011
    Publication date: October 3, 2013
    Applicant: Krauss-Maffei Wegmann GmbH & Co. KG
    Inventors: Alexander Simon, Ernst Tripp
  • Patent number: 8387539
    Abstract: Bombs lined with reactive liners that improve the blast and fragmentation of the bombs is disclosed. The effect is caused by the Richtmyer-Meshkov instability which is introduced at the explosive/reactive liner interface by introducing semi-cylindrical open linear cells between the reactive liner and the explosive that are void. This geometry produces a turbulent flow effect which readily mixes the reactive liner when accelerated by the grazing shock wave generated during detonation, which moves through the liner and case material. The geometry produces the added effect of creating faster and more plentiful fragments that are lighter in mass than those produced by typical bombs that are annularly lined with reactive liners, while maintaining insensitive munitions capability.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: March 5, 2013
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Warren R. Maines
  • Patent number: 8276520
    Abstract: A fragmentation warhead comprising manual selection means for generating larger fragments versus smaller fragments upon detonation. The warhead includes a generally cylindrically shaped fragmenting metal outer warhead within which lies a generally cylindrically shaped explosive charge. Cylindrically arranged ring mechanisms within the warhead may be rotated to select desired fragmentation patterns.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: October 2, 2012
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Richard Fong, Peter Rottinger, Henry Hsieh, Tom Blyskal
  • Publication number: 20120227611
    Abstract: A method for detonating a munition comprising the steps of providing a plurality of micro-detonators and microprocessors in said munition and initiating said micro-detonators in a predetermined sequence by means of said microprocessor. Depending on the specific predetermined sequence which is selected, one of a variety of explosive modes may be achieved.
    Type: Application
    Filed: January 12, 2011
    Publication date: September 13, 2012
    Applicant: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Paul R. ROHR
  • Patent number: 8161884
    Abstract: A selective fragmentation pattern of explosive material is applied to a surface of a munition. None, some, or all of the explosive material in the selective fragmentation pattern may be detonated, selectively stamping the surface of the munition with the detonated explosive material. The portion of the selective fragmentation pattern selected for ignition is determined by lethality requirements of a target of the munition. Upon detonation of the munition, fragments are formed based on the selected portion of the selective fragmentation pattern. Consequently, igniting all, some, or none of the selective fragmentation pattern may vary lethality of a munition and one munition may be used for a wide range of lethality.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: April 24, 2012
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Victor Kokodis, George Sudol, Brian Fuchs, Amy Wilson
  • Patent number: 8061275
    Abstract: A fragmentation warhead includes a cylindrical body, and an explosive charge disposed within the innermost part of the warhead body. Upon detonation of the explosive charge, the warhead body is ultimately caused to shear and break into fragments with controlled sizes, shapes. This invention enables target-adaptable fragmentation output based selectively controlling the size of preformed fragments ejected. Preformed tungsten alloy fragments of a first “small” size “A” are sintered to be joined into a plurality of larger size fragments “B”, using a tungsten alloy matrix. The B fragments are then joined into a desired shell shape and thickness and sintered into a fragmenting shell body using a different tungsten alloy matrix with bonds of melting point considerably lower than amongst the A fragment bonds.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: November 22, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Vladimir M. Gold
  • Patent number: 8015924
    Abstract: A warhead consisting of a relatively thin metal shell casing and interior open linear cells which run throughout its length manufactured by electrical discharge machining and slip fitting.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: September 13, 2011
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Warren R. Maines, Michael P. Kramer
  • Patent number: 7891297
    Abstract: A method for detonating a munition comprising the steps of providing a plurality of micro-detonators and microprocessors in said munition and initiating said micro-detonators in a predetermined sequence by means of said microprocessor. Depending on the specific predetermined sequence which is selected, one of a variety of explosive modes may be achieved.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: February 22, 2011
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Paul R. Rohr
  • Patent number: 7886667
    Abstract: A warhead includes a body, a patterned liner made of plastic, and an explosive charge disposed within the liner. The liner pattern is formed of gaps and liner elements. The explosive charge includes a first set of sections that are disposed adjacent to the liner gaps and a second set of sections that are disposed adjacent to the liner elements. Upon detonation of the explosive charge and because of the temporal delay in transmitting the detonation energy between these two sets of sections, the warhead body is caused to shear and break into fragments with controlled size. The use of plastic as the liner material also provides a welcome safety feature for this warhead. In the event of unwanted heat ignition, the plastic (which is also low melt temperature material), would melt to seal the explosive and would also flow. Because of the plastic, neither sudden pressure nor heat/ignition inside the round, would therefore be as catastrophic.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: February 15, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ernest Baker, Chuck Chin, Arthur Daniels, Stanley DeFisher, Vladimir Gold, Jack Pincay, Irene Wu
  • Publication number: 20100294160
    Abstract: A projectile (1) is optionally used as a fragmentation projectile or as a projectile that utilizes a pressure wave effect created when the explosive charge (3) explodes. The projectile (1) contains an ejection charge (12), and an explosive charge (3) arranged in a jacket (4) that can be moved axially with respect to a fragmentation casing (5). The ejection charge (12) allows the explosive charge (3) and surrounding jacket (4) to be pushed at least so far out of the projectile casing (2) that, in the event of explosion, the explosive charge does not act on the fragmentation casing (5). In order to ensure that the jacket (4) of the explosive charge (3) does not develop any fragmentation effect, or develops only a small fragmentation effect, when the explosive charge (3) is ignited, a molded part composed of plastic or a light alloy is used as the jacket (4).
    Type: Application
    Filed: May 24, 2010
    Publication date: November 25, 2010
    Applicant: RHEINMETALL WAFFE MUNITION GMBH
    Inventors: Christian BAUMANN, Thomas HEITMANN
  • Publication number: 20100242774
    Abstract: A manufacturing method for a heavy munition casing is provided, in which steel is rolled as a rough sheet or is forged as a slab depending on the desired casing size. Steel plates (2) produced in this way have a thickness that is somewhat greater than the manufacturing diameter of the munition casing (5). The steel used for this purpose has longitudinally oriented manganese sulfides (3), which are also shaped in the lateral direction, in addition to main shaping in the longitudinal direction, by shaping to form the shaped steel plate (2), and assume a longitudinally extending plate-shape as well. The initial material for the casing (5) is taken from an approximately rectangular steel plate (2), transversely with respect to the deformation direction. The quadrilateral piece obtained in this way is then turned to be round and is mechanically processed to form the shape of the casing (5).
    Type: Application
    Filed: February 16, 2010
    Publication date: September 30, 2010
    Applicant: RHEINMETALL WAFFE MUNITION GMBH
    Inventors: Wolfgang Arrenbrecht, Walter Grimm
  • Publication number: 20100192797
    Abstract: The invention relates to a warhead (10) for attacking particularly half-hard and/or soft targets, wherein the warhead comprises a splinter-forming casing (1) and an explosive material positioned in the casing (1). The warhead (10) further has a front plate (2) having a splinter formation, into which a distance sensor (3) is integrated. An igniter (5) for the explosive material and a stabilizing strap for adjusting perpendicular flight characteristics on the way to the target are located in the rear part of the warhead (10), wherein the initiation of the igniter (5) is determined by a property of the target to be attacked, namely, the parameter of a defined height from the target.
    Type: Application
    Filed: May 15, 2008
    Publication date: August 5, 2010
    Applicant: RHEINMETALL WAFFE MUNITION GMBH
    Inventors: Wolfgang Seidel, Michael Schwenzer
  • Patent number: 7743707
    Abstract: An explosive structure of the fragmentation type includes an outer casing comprising an energy dense explosive material and having an inner surface defining a chamber and means for propagating shock waves across the inner surface from a selected one of at least first and second detonation points within the casing. The explosive structure further includes first means for directing shock waves, propagated from the first detonation point, against at least a selected portion of the inner surface in a first pattern for scoring and weakening the casing along first, segment-defining lines and second means for directing shock waves, propagated from the second detonation point, against the selected portion of the inner surface in a second pattern for scoring and weakening the casing along second, segment-defining lines, the segments of the second pattern being larger than the segments of the first pattern.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: June 29, 2010
    Assignee: Lockheed Martin Corporation
    Inventors: Roger W. Melin, Edward W. Sheridan
  • Patent number: 7418906
    Abstract: A dual spin projectile includes a base; a body connected to the base with a first snap joint, the first snap joint allowing relative rotation between the base and the body; a can having an open forward end and connected to the body with a second snap joint, the second snap joint allowing relative rotation between the body and the can; an aft payload disposed in the body; a forward payload disposed in the can; and a cap connected to the can and closing the open forward end of the can.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: September 2, 2008
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Philip Brislin, Stephen Ginetto, Jeffery McNaboe, Roger Joinson, Richard DalBraccio
  • Patent number: 7418905
    Abstract: A missile, such as a cruise missile, has a nose payload portion having a frangible nose cover and a relatively hard target penetration nose cone. The nose cone may have a liquid fuel tank within, and a chemical energy explosive charge, such as a shaped charge, aft of the liquid fuel tank. The target penetration nose cone enables perforation of certain types of targets prior to detonation of the chemical energy explosive and the liquid fuel. The frangible nose cover is configured to be easily perforated or otherwise removed by the explosive force of the chemical energy explosive charge when the missile system is utilized for the attack of hard targets. The nose payload portion may have a fragmentation case, with one or more features designed to enhance fragmentation during detonation of the explosive and/or the liquid fuel.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: September 2, 2008
    Assignee: Raytheon Company
    Inventors: Thomas H. Bootes, Jesse T. Waddell
  • Patent number: 7121211
    Abstract: An ammunition projectile comprising a metal jacket containing a powder-based core incompletely filling the trailing end of the jacket, and a disc overlying the trailing end of the core within the jacket, the disc being frangible by reason of a plurality of indentations in at least one face of the disc. A method is claimed.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: October 17, 2006
    Assignee: Doris Nebel Beal Inter Vivos Patent Trust
    Inventor: Harold F. Beal
  • Patent number: 7093542
    Abstract: Warhead structures and features are fabricated using direct manufacturing technologies, a method for fabricating bulk warhead structures by sequential and additive deposition of melted feedstock layers. Suitable energy sources for melting the feedstock can be various high energy density technologies including laser, electron beam, plasma arc deposition, and the like. The high energy density in combination with high cooling rates results in structures with homogeneous microstructures. The feedstock can be in the form of wire or powder and is applied to a substrate by introduction to a molten pool on the substrate, accumulating to additively combine with the substrate. The approach provides for warhead structures with singular and combined unique features to include: integral constructions, tailored fragmentation patterns, use of dissimilar materials for special effects, and variable material property constructions for enhanced performance.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: August 22, 2006
    Assignee: Lockheed Martin Corporation
    Inventors: Kenneth G. Gousman, Scott D. Van Weelden, Brian T. Rosenberger
  • Patent number: 6857372
    Abstract: The object of the invention is an explosive ammunition (1) having a fragmenting structure comprising an explosive charge (3) configured in a splinter-generating shell (2). This ammunition is characterized by comprising a case (7) enclosing the shell (2) and containing means implementing a mechanical stress differential during ammunition ignition at the outer surface of the shell (2), where this differential enhances splinter generation and is distributed over a regular, 3D grid.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: February 22, 2005
    Assignee: Giat Industries
    Inventors: Jean-Luc Renaud-Bezot, Bertrand Padiolleau
  • Patent number: 6817299
    Abstract: A fragmenting projectile includes a multi-wall projectile casing with each wall thereof formed by a sleeve. Each pair of adjacent sleeves is defined by inner and outer sleeves that mate in a threaded engagement. Explosive material is disposed in an innermost sleeve.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: November 16, 2004
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David P. Cooke
  • Patent number: 6708619
    Abstract: A cartridge shell 10 comprises a main body 12 defining a volume 14 for holding energetic material. The main body 12 has a first end 16 for location adjacent a toe 48 of a hole 46 and a second end 18 directed to the collar 50 of hole 46. The second end 18 is tapered to reduce in transverse area away from the first end to form a point or wedge-like member 20.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: March 23, 2004
    Assignee: Rocktek Limited
    Inventors: Edward Tota, Nigel Rogers
  • Patent number: 6619210
    Abstract: A warhead casing defines a geometry that is a portion of a ring having an outer radial wall and an inner radial wall spaced radially apart from one another. The outer radial wall and inner radial wall are joined radially by side walls, while the casing is enclosed at either axial end thereof by end walls. An explosive material fills the casing. At least one initiator is positioned in the explosive material along a radial plane that bisects the portion of the ring. Detonation of the explosive material causes the inner radial wall to form an EFP while the outer radial wall fragments.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: September 16, 2003
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Timothy L. Spivak, Maurice E. Grudza, William J. Clark
  • Patent number: 6536351
    Abstract: A warhead (1) having a warhead casing (2) that encloses an explosive charge (5). To ensure that, during the detonation of the explosive charge (5), the warhead (1) effects a rapid acceleration of the fragments flying in the flight direction, and a lesser acceleration of the fragments flying away laterally from the warhead, and/or generates a relatively intense lateral pressure wave, the charge has at least two different partial charges (7, 8-10) corresponding to the intended use of the warhead (1). The first partial charge (7), which is disposed in the region of the tip of the warhead (1), and comprises, for example, octogen (HMX), possesses a high detonation speed in order, when detonated, to accelerate heavy-metal fragments (preferably WSM spherical fragments) disposed in front of the partial charge very rapidly forward. In contrast, the second partial charge (8-10), which adjoins the rear of the first partial charge (7), is a far less costly charge, e.g.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: March 25, 2003
    Assignee: Rheinmetall W & M GmbH
    Inventors: Jürgen Böcker, Paul Wanninger
  • Patent number: 6502515
    Abstract: A method of providing a high-explosive projectile with desired areas of fragmentation includes the following steps: securing a steel plate component in a circumferentially extending recess in the outer surface of a projectile body; directing an energy beam to outer surface portions of the steel plate component; heating, by the energy beam, narrow zones to a temperature above the melting temperature of the steel plate component to a predetermined depth thereof; and cooling the heated zones for effecting structural metallurgical changes in the steel plate component for obtaining the desired areas of fragmentation.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: January 7, 2003
    Assignee: Rheinmetall W & M GmbH
    Inventors: Helmut Burckhardt, Walter Simon, Thomas Heitmann
  • Patent number: 6484642
    Abstract: Fragmentation body for fragmentation projectiles and warheads, including an integral fragmentation shell structure made of cast metal, and the shell structure has an outer wall surface and an inner wall surface separated by a thickness of the shell, where at least one of the inner or outer surfaces includes recesses formed through part of the thickness of the shell to define a plurality of fragments which remain integrated with the shell structure until an explosive force is detonated in proximity of the shell, wherein the shell material comprises a steel alloy including carbon, chromium, nickel, molybdenum, cobalt, and the balance essentially being iron. Shell structures of the inventive fragmentation body also have a fragmentation pattern defined via recesses or grooves provided in at least one of the inner or outer wall surfaces thereof to define the size and shapes of the fragment projectiles desired.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: November 26, 2002
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Lucia D. Kuhns, Donna R. Reedal, Leonard T. Wilson
  • Patent number: 6477959
    Abstract: A wall breaching warhead 10 for forming a hole through a brick wall includes a shaped charge 12 of explosive material having a central axis 14. The front surface of shaped charge 12 includes a central portion 16, adjacent to central axis 14, having a generally convexly-curved shape, and an annular portion 18, circumscribing central portion 16, having a generally concavely-curved shape. A metallic liner 20, adjacent to at least annular portion 18 of the front surface of charge 12.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: November 12, 2002
    Assignee: Rafael-Armament Development Authority Ltd.
    Inventors: Zeev Ritman, Mordechai Avitan
  • Publication number: 20020014177
    Abstract: The object of the invention is an explosive ammunition (1) having a fragmenting structure comprising an explosive charge (3) configured in a splinter-generating shell (2).
    Type: Application
    Filed: July 26, 2001
    Publication date: February 7, 2002
    Applicant: GIAT INDUSTRIES.
    Inventors: Jean-Luc Renaud-Bezot, Bertrand Padiolleau
  • Publication number: 20010004868
    Abstract: A method of providing a high-explosive projectile with desired areas of fragmentation includes the following steps: securing a steel plate component in a circumferentially extending recess in the outer surface of a projectile body; directing an energy beam to outer surface portions of the steel plate component; heating, by the energy beam, narrow zones to a temperature above the melting temperature of the steel plate component to a predetermined depth thereof; and cooling the heated zones for effecting structural metallurgical changes in the steel plate component for obtaining the desired areas of fragmentation.
    Type: Application
    Filed: December 14, 2000
    Publication date: June 28, 2001
    Inventors: Helmut Burckhardt, Walter Simon, Thomas Heitmann
  • Patent number: 5965838
    Abstract: A warhead for use in air defense missiles has a flat-sided cross-sectional onfiguration which can be mass focused to direct an entire side onto a target. The warhead may be rotated about the missile longitudinal axis to properly orient a warhead side at the time of detonation.
    Type: Grant
    Filed: March 13, 1975
    Date of Patent: October 12, 1999
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: George T. Boswell, William G. Rueb
  • Patent number: 5852256
    Abstract: A non-nuclear, non-focusing, active warhead that comprises a high explosive charge contained within a casing of reactive metal. When the high explosive is detonated, the reactive metal is dispersed and reacts with the air, which significantly increases the explosive yield of the warhead. The active warhead produces therefore much higher blast effects with significantly reduced weight compared to conventional munitions. The warhead is highly effective against such targets as aircraft which typically have thin fuselages, for example. The explosiveness of this warhead can be enhanced further by elevating the temperature and therefore the reactivity of the reactive metal before or during the explosion. New methods of enhancing the reactivity of the metal are also taught.
    Type: Grant
    Filed: March 16, 1979
    Date of Patent: December 22, 1998
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Howard C. Hornig
  • Patent number: 5690867
    Abstract: The invention relates to a process for the manufacture of an explosive ammunition component with controlled fragmentation, comprising a charge of solid explosive contained in a metal casing internally clad with a sleeve externally provided with indentations.A rigid sleeve made of plastic or elastomer, externally provided with indentations and which has a form of a vessel provided with a single opening, is produced first of all, and then this sleeve is introduced, with the bottom first, into a metal casing comprising an opening and whose shape and dimensions are such as to allow the sleeve to clad the casing internally.A pasty or liquid explosive composition is next cast into the sleeve and the composition is then solidified.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: November 25, 1997
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Bruno Nouguez, Claude Grimelli, Pierre Vitrant, Alain Bonnel, Alain Tinet
  • Patent number: 5339741
    Abstract: A system and method for launching projectiles, such as fireworks projectiles, which explode in the air into a pyrotechnic display. The projectile includes a shell constructed from a binding agent and an explosive additive which explodes the shell into small particles. The explosive additive, which may be nitrocellulose, causes the exploded particles to be rapidly burned and consumed to form lightweight, inert flakes that fall harmlessly to the ground. The projectile is aimed and launched by a launcher using a compressed gas to rapidly expel the projectile from a launching tube. Once in the air at a predetermined location in the sky, an electronic fuse inside the projectile operates to detonate the projectile into its intended pyrotechnic display. The fuse is extremely accurate and enables detonation of the projectile at precise altitudes. An electronic control system controls launching and detonation of the projectiles in a precise and repeatable manner.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: August 23, 1994
    Assignee: The Walt Disney Company
    Inventors: B. Thomas Craven, William G. Wiedefeld, Kyle W. Poor, Bruce S. Johnson, John W. Sogge, Michael H. Peterson, William G. Adamson, Ronald W. Froelich
  • Patent number: 5337673
    Abstract: An improved method of producing a controlled fragmentation warhead case by mbedding an expanded metal liner on the interior surface of a casing for a warhead or other ordnance device. The process of embedding an expanded metal liner into the casing during the forming of the casing produces a controlled fragmentation grid on the interior surface of the casing. The improved method of producing a controlled fragmentation warhead case is particularly suitable for weapon systems employing large, unitary warheads.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: August 16, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert A. Koontz, Kenneth R. Hayes
  • Patent number: 5313887
    Abstract: A pyrotechnic device comprises a receptacle which contains a charge of pyrotechnic material and an electric fuse to initiate the charge. The receptacle is formed of a plastics housing which has an area formed of lines of weakness adapted to rupture on activation of the pyrotechnic material and a closure having an integrally moulded projection which defines a screw-thread, electric contacts being associated with the projection and trapping the bared ends of wires associated with the fuse.
    Type: Grant
    Filed: May 23, 1991
    Date of Patent: May 24, 1994
    Assignee: J.E.M. Smoke Machine Company
    Inventor: Nigel Morris
  • Patent number: 5157225
    Abstract: A controlled fragmentation explosive device is disclosed. Fragmentation crol is achieved by providing both the inner and outer surfaces of a cylindrical case with intersecting longitudinal and circumferential "v" grooves having specific depth relationships. The inner and outer grooves are aligned with each other. The outer grooves are filled with a material for improving the acoustic impedence mismatch between the case and the volume within the "v" groove.
    Type: Grant
    Filed: April 19, 1983
    Date of Patent: October 20, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: John C. Adams, Thomas S. Smith, Joseph B. Bickley
  • Patent number: 5131329
    Abstract: A fragmentation projectile having at least two adjacent casings including an inner casing having an inner surface and an outer surface, and at least one outer casing substantially surrounding the outer surface of the inner casing. An explosive charge is disposed within the inner casing, and an incendiary mass is disposed on the inner surface of the inner casing and facing the explosive. Structured zones are defined on the inner casing and include regions of lesser wall thickness than the portions of the inner casing surrounding the regions to cause a shock wave generated when the explosive charge is detonated to be transferred locally into the at least one outer casing to produce fragments of a predetermined size and shape.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: July 21, 1992
    Assignee: Rheinmetall GmbH
    Inventors: Hendrik Lips, Herbert Weisshaupt, Hans Orth
  • Patent number: 5095821
    Abstract: The fragmentation casing has a one-piece hollow body (1) that incorporates nominal break points; this hollow body (1) is divided at least in one section (4) by at least one separating cut (5) that forms a separating gap. The separating cut is so made that the hollow body remains in the form of a one-piece structure. The surfaces of the separating cut that are adjacent in the separating gap are brought into contact with each other and are so fixed in contact with each other.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: March 17, 1992
    Assignee: HUG Interlizenz AG
    Inventor: Karl Merz
  • Patent number: 5048423
    Abstract: A cartridge case for a telescoped ammunition round has a generally tubular case wall and an axially extending elongate score line in said wall to provide pressure relief during firing of the round. The elongate score line has a radial depth less than the radial thickness of the wall.
    Type: Grant
    Filed: July 6, 1990
    Date of Patent: September 17, 1991
    Assignee: Loral Aerospace Corp.
    Inventor: Harold E. Garrett
  • Patent number: 5040464
    Abstract: The fragmenting single walled cylinder disclosed yields a plurality of frents having shapes and masses according to a predetermined distribution. Fragment yield is controlled by the profile and orientation of internally formed grooves.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: August 20, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: John Pearson
  • Patent number: H1235
    Abstract: Improved armor-piercing projectile of either caliber or saboted, subcaliber esign for effectively penetrating and destroying a fast moving, armored target. The improved projectile is generally comprised of a dome-shaped nose, a fragmentable hollow body of thimble-like configuration, and an integrated base-plug and fuse device. The hollow body is advantageously made up of a heavy metal, preferably either a tungsten alloy or depleted uranium, having a predetermined density of at least eleven grams per cubic centimeter (11.0 gm/cc). The interior of the hollow body is filled with a suitable high energy explosive material. The improved projectile, by reason of its hollow body, not only exhibits an improved ballistic coefficient as compared to previous projectile designs, but also maintains a substantially more uniform velocity throughout its effective range so as to strike a target in shorter time and with greater momentum.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: October 5, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Michael C. Canaday
  • Patent number: H1367
    Abstract: A wire assault weapon warhead preferably for breaching barbed-wire barrics in a battlefield at standoff distances, has a cylindrical shaped projectile having a domed nose cone and a rear bulkhead sized so as to allow the warhead to be fired from a Shoulder-Fired Multi-Purpose Assault Weapon or a similar weapon. The warhead includes a fragmentation tube that fragments upon the detonation of an explosive charge and the fragments expelled into the wire of the barricade sever the wire and breach the barricade.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: November 1, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Louie A. Allen, Jr., Tucker T. Yee