Fragmentation Patents (Class 102/389)
  • Patent number: 8943974
    Abstract: A wall breaching explosive fragmentation ammunition having a tungsten alloy nose cap with ceramic cone nose which make possible penetration into a hardened target with survivability of the warhead. The ammunition employs a unitary construction with fuze completely within the projectile's shell case. The ammunition has an external plastic rotating band which also encloses an induction antenna. The antenna may signal the fuze on a wire, through a hole in the shell case. The fuze signals may be fed through a gun barrel, then picked up on the antenna. The ammunition also employs a controlled pattern fragmentation mechanism incorporating a patterned plastic liner.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: February 3, 2015
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Vladimir M. Gold, William J. Poulos
  • Patent number: 8794154
    Abstract: An artillery projectile for firing from an artillery gun, mortar or artillery rocket launcher. The artillery projectile includes a body, a payload with a number of inert fragments located within the body, a booster motor associated with the body for accelerating the body with the payload to a penetration velocity, and an opening arrangement associated with the body and deployed for initiating release of the fragments. The artillery projectile further includes a control system causally associated with the booster motor and the opening arrangement. The control system is configured to generate a first command to actuate the booster motor and a second command to actuate the opening arrangement.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: August 5, 2014
    Assignee: Rafael Advanced Defense Systems Ltd.
    Inventor: Menachem Rotkopf
  • Patent number: 8387538
    Abstract: Some embodiments pertain to a projectile that includes a propellant and a casing that encloses the propellant such that the casing acts as a reaction chamber during flight of the projectile. The casing includes a plurality of flechettes. When the projectile strikes (or is near) a target, a large internal sheer pressure forms within the casing. This sheer pressure causes the flechettes to sheer apart at the thinnest sections of the casing. Once the thin sections of the casing are sheered apart, the flechettes will be unconstrained such that the flechettes take individual flight paths.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: March 5, 2013
    Assignee: Raytheon Company
    Inventor: Steven J. Elder
  • Patent number: 8272329
    Abstract: The dynamically configurable controlled fragmentation insert mechanism of this invention includes an assembly of three or more sleeves with differing through hole patterns thereon, that fit inside the shell casing. The individual sleeves can move independently of one another and a simple pinning mechanism holds the parts in place for a selected configuration. The warfighter can realign the insert sleeves by to create different geometric patterns of holes, each designed to engage a different target set with optimally sized fragments. The aligned patterns of holes creates individual geometric shapes that focus high-velocity jets to cut into the steel shell casing to correlate to the through-holes in the aligned patterned sleeves. Realigning the insert sleeves changes the through-hole pattern to produce different fragment sizes and mass distributions.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: September 25, 2012
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Henry Hsieh, Peter Rottinger, Richard Fong
  • Patent number: 7347906
    Abstract: The invention, as embodied herein, comprises a variable yield warhead comprising an inner core of cylindrically-shaped, explosive material surrounded by an outer annulus of a different explosive material. The inner core explosive material has a heat of combustion comprising about 16 kcal/cc or higher and the outer annulus of explosive material has a heat of detonation comprising about 2.1 kcal/cc or higher. A warhead casing surrounds the outer annulus of material. The warhead has a dual initiation system. The first initiation system comprises a detonation cord that extends substantially through the inner core of explosive material and has an initiator at the tope side. The second initiation system comprises a booster explosive that contacts the bottom side of the outer annulus of explosive material and an initiator proximate to the booster.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: March 25, 2008
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Raafat H. Guirguis
  • Patent number: 6966265
    Abstract: An ammunition device (4) comprising one or more warhead effect jackets (17), each jacket containing warhead effect elements (18). The ammunition device also incorporates one or more explosive compositions arranged inside each warhead effect jacket that in or close to the target is/are triggerable by means of a triggering device. One or more separation charges is/are arranged adjacent to each warhead effect jacket that when actuated cause removel of one or more said warhead effect jacket(s). The actuation devices incorporate or interact with a programming device that operates with a first mode that can be an initial mode in which the actuation devices remain non-actuated, and a second mode in which the programming device actuates the actuation devices for initiating the separation charges, thereby causing ejection of each warhead effect jacket concerned.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: November 22, 2005
    Assignee: Bofors Defence AB
    Inventors: Torsten Ronn, Nils Johansson
  • Patent number: 6962113
    Abstract: The present invention comprises a warhead designed to provide a number of spiraling tendrils composed of segmented rods that move in an increasing radial arc in order to defeat a target. The warhead comprises a substantially cylindrical explosive charge having a plurality of rod segments arranged circumferentially around the explosive charge in a plurality of horizontal layers. As the horizontal layers descend down the explosive charge, the rod segments are offset from those directly above and below them to create a pattern that appears to be twisted columns. The number of columns is equivalent to the number of rod segments in each horizontal layer.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: November 8, 2005
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Victor John Carlson, Timothy S. Hennessey, Mary H. Sherlock, Windsor Furr
  • Patent number: 6910421
    Abstract: A general purpose bomb having a shaped charge penetrator warhead mounted in the front of the bomb and facing forward, in which the caliber of the warhead is at least 90% of the caliber of the general purpose bomb.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: June 28, 2005
    Assignee: BAE Systems plc
    Inventors: Bernard C. Gethings, Dennis J. Flynn, John A. Appleton
  • Patent number: 6895864
    Abstract: The present invention relates to a segmented subcaliber projectile (1) subdivisible into a number of separate segments contiguous with each other at least initially to form an integral projectile of united segments or submunitions (5). The advantage with this subcaliber projectile is that since the segments or submunitions (5) are arranged sequentially after each other, each one comprises an explosive charge (7) initiatable by a very powerful shock and encased in an outer casing (6) of hard material such that the projectile in integral form can be used directly against heavy armor, and by means of dispersion of the various segments can also be used against aircraft.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: May 24, 2005
    Assignee: Borfors Defence AB
    Inventor: Torsten Ronn
  • Patent number: 6374744
    Abstract: A shrouded bomb is provided having components which are substantially free of weld lines and rivets. The shroud assembly includes a nose cone having a forward end and a rear end, a central tube having a forward end contiguous with the rear end of the nose cone, and a rear end, and an aft tube having a forward end contiguous with the rear end of the central tube.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: April 23, 2002
    Assignee: Lockheed Martin Corporation
    Inventors: Bruce E. Schmacker, Ronald L. Wooten
  • Patent number: 5691502
    Abstract: A plurality of objects is deployed in generally radial directions at low velocities in order to achieve a predetermined pattern of the deployed objects. The device has a metal inner wall member (20, 120) having a plurality of annular cylindrical segments of differing outside diameters, an explosive body (22, 122) of low velocity explosive, and a plurality of arrays (40, 140) positioned coaxially with and exteriorly of the explosive body (22, 122) and spaced along the length of the explosive body (22, 122). Each array (40, 140) comprises a plurality of objects (28). The explosive body (22, 122) can be in the form of a plurality of annular sections which provide the objects (28) in each array with an amount of energy different from that provided to each of the objects in the adjacent array. An annular flange (32) can separate the forward end of the explosive body (22, 122) from a booster ring (66), or the booster ring (166) can be positioned within a central cavity of the inner wall member (120).
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: November 25, 1997
    Assignee: Lockheed Martin Vought Systems Corp.
    Inventors: Gerald Graves Craddock, Elmer C. Cruise
  • Patent number: 5668346
    Abstract: For attacking semi-hard target objects (21) even in a semi-covered position (for the avoidance of the munition-technical expenditure on the intelligent search-fuse submunition with P-charge against hard targets), there is provided a scatter munition whose warhead (22 ) descends into the target area (12 ), hanging on a rotational parachute (13), and triggers off a fragment cone of heavy metal balls (23) inclinedly downwardly as soon as a search-fuse sensor (19) which is oriented parallel to the operative direction acquires a target object (21) on the basis of its own radiation, its radiation shadow or its contour relative to the surrounding target area (12).
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: September 16, 1997
    Assignee: Diehl GmbH & Co.
    Inventors: Jurgen Kunz, Max Rentzsch
  • Patent number: 5535679
    Abstract: A plurality of objects is deployed in generally radial directions at a low velocity in order to achieve a predetermined pattern of the deployed objects. The device has an inner wall member (20), an annular body (43) of low velocity explosive, at least a first plurality of objects (56) in a first annular array (51) and a second plurality of objects (56) in a second annular array (52) positioned coaxially with and exteriorly of the annular body (43) of low velocity explosive, the arrays being positioned at different locations along the length of the annular body (43) of low velocity explosive such that the objects in each array are provided with an amount of energy different from that provided to each of the objects in the adjacent array. Each of the objects (56) has a shape which minimizes aerodynamically induced deviations in the path of the object during deployment, a mass of at least 50 grams, and a density of at least 15 g/cc.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: July 16, 1996
    Assignee: Loral Vought Systems Corporation
    Inventor: Gerald G. Craddock
  • 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: 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: 4516501
    Abstract: Ammunition, such as a warhead with an explosive charge comprises a casing which is provided with a material construction of a nature providing at least controlled formation of fragments of a certain preferred mass, coverings for formation of explosion formed projectiles of a certain preferred mass, or preformed fragments of a certain preferred mass. The explosive charge is located within the casing and there are means for selective munition conversion alternatively to control formation of fragments or to natural fragmentation. For this purpose one or more recesses are provided in the explosive charge adjacent the casing as a means for munition conversion to the formation of explosion formed projectiles or unshattered preformed fragments. The filling of inert material is provided in at least a portion of the recess and it comprises a liquid inert material or a plastic inert material or a liquid explosive or plastic explosive.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: May 14, 1985
    Assignee: Messerschmitt-Bolkow-Blohm GmbH
    Inventors: Manfred Held, Peter Grossler
  • Patent number: 4458596
    Abstract: A multi-purpose bomblet is designed for accomplishing various military mions. A standoff spike and shaped charged are provided for piercing heavy armor and a fragmentation case surrounds the shaped charge. Upon detonation of the shaped charge, the fragmentation case disintegrates to provide shrapnel which is effective against personnel. An inner liner of incendiary material also surrounds the shaped charge and, upon detonation of the shaped charge, the incendiary material is ignited and dispersed and is useful for starting fires.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: July 10, 1984
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Stanley Armstrong
  • Patent number: 4398467
    Abstract: An explosive fragmentation device such as a grenade or a mortar bomb has a casing formed from flat sided notched wire formed into a coil. Instead of coiling the wire so that sides of the coiled wire which are adjacent after coiling lie normal to the longitudinal axis of the coil, as in a known form of grenade body, the wire is given additionally a twist about its own longitudinal axis during coiling, so that the adjacent flat faces of adjacent turns are substantially normal to the surface of the finished casing. In this way adjacent turns overlay one another, preferably completely, and the outer surface of the casing can then be smooth. Also, adjacent turns can then be bonded together as by brazing or soldering, which is impractical with coiling "normal to the axis". This means explosive cannot be trapped between adjacent turns to be accidentally detonated, an outer casing is unnecessary, and the casing is stronger.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: August 16, 1983
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: John W. Leigh
  • Patent number: H1047
    Abstract: A rod for use in fragmenting warheads is notched so that when it is subjed to an explosive load it will break into individual fragments of predetermined shape and size. Various materials can be used depending on the desired kill mechanism. The rods may be alternated and stacked to combine materials and kill mechanisms.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: May 5, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: William M. Henderson, Leonard T. Wilson, Charles R. Garnett
  • Patent number: H1048
    Abstract: A rod is constructed using two or more materials. It is notched so that w it is subject to an explosive load it will break into individual fragments of predetermined shape and size. Rod materials are selected so that a combination of two or more kill mechanisms can be included in a single fragment. If desired, the rod can be divided into segments that contain liquid compounds.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: May 5, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Leonard T. Wilson, Charles R. Garnett, William M. Henderson