Mat Or Deflector Patents (Class 102/303)
  • Patent number: 9822537
    Abstract: A safety system may include a shield for protecting or shielding personnel operating in a personnel working area from a hazard provided on a structure. The structure may be a wind turbine, the hazard may be a projecting flange of the wind turbine tower, and the personnel working area may be a ladder inside the wind turbine tower. The shield may have a bend or curvature when installed in order to cover the hazard. The shield may include a plurality of wings projecting from an intermediary portion of the shield. The wings may be separated from each other by a wing gap. Other structures, working areas, and hazards are contemplated and described in the disclosure.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: November 21, 2017
    Assignee: Inventus Holdings, LLC
    Inventors: Gary M. Garcia, Grayling Vander Velde
  • Patent number: 9764304
    Abstract: Methods and systems for concentrating and allowing for separation of nanoparticles from fluids use acoustically driven nanoparticle concentrators which have an aerogel as the reflecting material and include tuning capabilities to alter the location at which the particles are being concentrated.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: September 19, 2017
    Assignee: Empire Technology Development LLC
    Inventors: Sung-Wei Chen, Christopher J. Rothfuss
  • Patent number: 9421731
    Abstract: A panel structure includes a plate-like flat panel and a reinforcement panel in which a criterion plate portion and a plurality of truncated conic protrusions protruding from the criterion plate portion are formed. Apex portions of the plurality of truncated conic protrusions in the reinforcement panel are joined to the flat panel by an adhesive.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: August 23, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akira Furutani, You Gotou
  • Patent number: 8573125
    Abstract: A relatively lightweight, modular, blast control system utilizes a plurality of fabric panels that may be joined to form a matrix or blanket to protect or control the blast. The panels are preferably made from layers of auxetic woven fabric, with each successive fabric layer oriented between 0-90 degrees from the previous layer. The panels may be connected together via a locking mechanism or assembly comprising a cable which runs the length of the perimeter of each fabric panel, and a torque pin rotated about two adjoining cables to form an interlocking connection. The panels connected in this manner form the fully assembled blast control blanket.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: November 5, 2013
    Inventors: Richard Rossow, Cheri McConnell, Vikas Verma
  • Publication number: 20130263752
    Abstract: The present invention relates to a method and related devices for carrying out TBM excavation and expansion blasting, which uses a blast protector and a cart to expand a pilot tunnel by blasting after the pilot tunnel has been formed; and which specifically includes: a step of forming a pilot tunnel; a step of forming a horizontal or vertical blast hole; a step of installing a blast protector within the pilot tunnel; a step of blasting the upper and lower halves of the pilot tunnel to expand the upper and lower halves; and a step of removing the debris formed during the blasting of the upper and lower halves, by dumping the debris into a cart. Accordingly, the rail and cable are protected from the debris formed during the blasting, and working efficiency is improved.
    Type: Application
    Filed: September 29, 2011
    Publication date: October 10, 2013
    Inventor: Chan Woo Lee
  • Patent number: 8413564
    Abstract: A portable protective shield for an IED or other suspected explosive devices includes a plurality of toroidal rings clamped between a lid and a base of the shield. The device is capable of withstanding high-pressure blast waves, thermal release and/or high-velocity fragments.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: April 9, 2013
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: James A. Genovese, Stephen J. Comaty, Edward M. Rychwalski
  • Patent number: 8302533
    Abstract: A protection device comprises a covering including at least a layer of ballistics material, and a layer of an electromagnetic screening material.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: November 6, 2012
    Assignee: Kirintec Limited
    Inventor: Roy Peers-Smith
  • Patent number: 7918167
    Abstract: Barriers and methods of obstructing apertures. One embodiment provides a temporary barrier that includes a bag, a fluid source, and a shear thickening fluid. The bag is made of fabric and can expand (e.g. inflate) via the fluid source which is in communication with the bag. The shear thickening fluid permeates the fabric of the bag and has two states. In the first state the shear thickening fluid allows the fabric to be flexible. In the second state the shear thickening fluid causes the fabric to be inflexible. To cause the shear thickening fluid to transition to the second state a shear must be present in the shear thickening fluid. A material that is capable of reacting to form a gas may be in communication with the fluid source to provide a gas to expand the bag. A deflation valve may also be included in the barrier.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: April 5, 2011
    Assignee: The Boeing Company
    Inventors: Minas H. Tanielian, Thomas A. Woodrow
  • Publication number: 20100282050
    Abstract: A protection device comprises a covering including at least a layer of ballistics material, and a layer of an electromagnetic screening material.
    Type: Application
    Filed: May 6, 2010
    Publication date: November 11, 2010
    Applicant: Kirintec Limited
    Inventor: Roy Peers-Smith
  • Publication number: 20100206159
    Abstract: A blast shield formed as a multilayer sandwich of composite material configured to provide protection to bystanders in close proximity to operation of a linear shaped charge. An exemplary embodiment may be used to shield passengers when explosively cutting an emergency door in airliners. The composite material forming a blast shield may have two types of composition: the first type contains a layer of carbon fiber cloth, a layer of natural rubber and a layer of Kevlar fiber cloth, from the inside out in order. The second type contains a layer of carbon fiber cloth, a layer of Kevlar fiber cloth and a layer of polyurethane rubber, from the inside out in order. Both types typically use epoxy resin as the bond between each layer. Through the composition of fiber and rubber, embodiments can effectively block the spread of explosive shock waves, reduce the noise, decrease the weight of protective devices, and avoid forming wounding debris.
    Type: Application
    Filed: February 15, 2010
    Publication date: August 19, 2010
    Inventors: YaoHua Wang, Hui Wang
  • Patent number: 7581478
    Abstract: An apparatus for blast suppression involves forming a foam barrier in proximity to a bomb or other suspicious device. The foam is maintained in position by a containment structure which is inflated and kept in an inflated state by the foam used to form such barrier. Various containment structures are disclosed for suppression of compression waves and combustion effects caused by an explosive event.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: September 1, 2009
    Inventors: Chris Lacombe, Keith Scott, Jeffrey Lynn Hildreth
  • Patent number: 7520223
    Abstract: A container, such as a standard aircraft unit load device, a truck trailer, a ship's cargo compartment, or the like, is fitted with a blast mitigating material located within the container. The blast mitigating material can be fitted to the container during manufacture, or an existing container can be retrofitted.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: April 21, 2009
    Assignee: Blastgard Technologies, Inc.
    Inventors: Kevin John Sharpe, Jack Waddell, James F. Gordon
  • Publication number: 20080257137
    Abstract: According to the invention, there is provided a blast mitigation device (1) comprising one or more inflatable, rigidisable, free-standing arched frames comprised of one or more compartments (4, 4a), the or each compartment being fillable, in use, with a gaseous medium under pressure, and one or more water-fillable containers (3, 3a) supported or supportable by the or each free standing frame, which water-fillable container(s) form a blast mitigation structure in use.
    Type: Application
    Filed: March 15, 2005
    Publication date: October 23, 2008
    Applicant: Cintec International Limited
    Inventor: Peter James
  • Publication number: 20080087185
    Abstract: Apparatus for suppressing the effects of an explosion or collision, the apparatus comprising or including a pair of inflatable spaced-apart walled containers (1, 2) connected or connectable at respective upper ends to each other by webs (3), and connected or connectable at their respective lower ends to each other by an inflatable base (4), and inflatable support cushion means (5) disposed between the walled containers to at least partially support the walls thereof against collapse when such are filled with water.
    Type: Application
    Filed: July 20, 2004
    Publication date: April 17, 2008
    Inventor: Peter (NMI) James
  • Patent number: 7331291
    Abstract: A self-supporting air tube for blasting and method of blasting rock using the air tube. The air tube includes an air bladder, a pair of support wings and an inlet. The air bladder has a diameter smaller than that of a blasting hole and extends longitudinally. The support wings extend from the outside of the air bladder to the wall of the blasting hole symmetrically with respect to the longitudinal axis of the air bladder so as to surround the air bladder and have certain widths. The inlet is attached to the upper fusion-welded portion of the air bladder to inject air into the air bladder. The total diameter of the air tube is smaller than the diameter of the blasting hole, and the air tube is inserted into the blasting hole and self-supported on a wall of the blasting hole.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: February 19, 2008
    Inventor: Dae Woo Kang
  • Patent number: 7313994
    Abstract: An improved method of blast suppression involves forming a foam barrier in proximity to a bomb or other suspicious device. The foam is maintained in position by a containment structure which is inflated and kept in an inflated state by the foam used to form such barrier. Various containment structures and methods are disclosed for suppression of compression waves and combustion effects caused by an explosive event.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: January 1, 2008
    Assignee: Burner Fire Control, Inc.
    Inventors: Chris Lacombe, Keith Scott, Jeffrey Lynn Hildreth
  • Patent number: 7067031
    Abstract: Disclosed is a process for making a ceramic armor plate. A backing element having a known two-dimensional size is provided. A plurality of ceramic armor tiles are placed side by side to form a layer of ceramic armor tiles on a front surface of the backing element, and the layer of ceramic armor tiles is affixed to the backing element. An abrasivejet cutter is used to cut continuously through at least two adjacent ceramic armor tiles of the affixed layer of ceramic armor tiles, and through a corresponding portion of the backing element affixed thereto, so as to delineate a portion of a ceramic armor plate.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: June 27, 2006
    Assignee: DEW Engineering and Development Limited
    Inventor: Fabio deWitt
  • Patent number: 6886299
    Abstract: A flexible blast curtain will reduce casualties and property damage in the event of a terrorist bombing by intercepting flying debris and dissipating over pressure through deflection of the curtain. The blast curtain may be attached directly to buildings or mounted on frames anchored in close proximity to buildings. The curtain provides complete visibility and easy pedestrian ingress and egress for the buildings.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: May 3, 2005
    Assignee: Targus International, Inc.
    Inventor: Ted Gower
  • Publication number: 20040112240
    Abstract: A blast protection system is provided for protecting an asset from a blast force. The system has a shaft; a plurality of plates mounted on the shaft; a panel attached to a first plate of the plurality of plates and for receiving the blast force and transmitting a portion of the blast force to the first plate; and a base attached to a second plate of the plurality of the plates and for receiving a portion of the force transmitted to the first plate by the panel. The force received by the base is less than the blast force.
    Type: Application
    Filed: September 17, 2003
    Publication date: June 17, 2004
    Applicant: Dynawave Corporation
    Inventor: Vernon Eric Staton
  • Patent number: 6677034
    Abstract: In its first aspect the invention provides an electromechanical acoustic transducer (5) which is resistively terminated at the rear with a closely-coupled sound absorber (7) made from an aerogel with good acoustic absorption at low frequencies. The invention also provides an aerogel suitable for this use and which is a conglomerate of small particles packed so that there are spaces left therebetween to allow the passage of sound. Moreover, the invention provides an aerogel suitable for this use and comprised of multiple layers (17a etc.) of materials of graded properties, or comprised of material of continuously varying properties throughout the thickness of the absorbing structure, in the principal direction of sound from the source.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: January 13, 2004
    Assignee: 1 . . . Limited
    Inventors: Anthony Hooley, David Henry Pearce, Luc Forest
  • Patent number: 6655290
    Abstract: A blasting mat assembly comprising a steel plate member having thickness capable of bearing a blasting pressure of explosives inputted to blasting hole; an elastic member which is fixedly attached along a bottom edge of the steel plate member for isolating blasting noise, blasting gas and flying material. Explosives inputted into each blasting hole of blasting region are discharged; and a weight reinforcing member which is welded to a top surface of the steel plate member in a structure of a grid frame made of steel beams.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: December 2, 2003
    Inventor: Yong-So Cho
  • Patent number: 6622631
    Abstract: A blasting mat assembly comprising a steel plate member having thickness capable of bearing a blasting pressure of explosives inputted to blasting hole; an elastic member which is fixedly attached along a bottom edge of the steel plate member for isolating blasting noise, blasting gas and flying material. Explosives inputted into each blasting hole of blasting region are discharged; and a weight reinforcing member which is welded to a top surface of the steel plate member in a structure of a grid frame made of steel beams.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: September 23, 2003
    Inventor: Yong-So Cho
  • Patent number: 6439120
    Abstract: The invention disclosed is an apparatus for explosive blast suppression, and a method therefor, the apparatus comprising a hemispherical enclosure (10) defined by an upstanding wall, positioning means (42) associated with the enclosure, for positioning the explosive device substantially equidistant from any point on the wall, and in a preferred embodiment includes an integral floor (40) and a rounded lower wall, to provide a substantially even distribution of blast forces in all directions toward the wall. The enclosure is made of composite textile material, comprising one or several layers of a ballistic material (e.g. Dyneema Kevlar) sandwiched between inner and outer layers of a light-weight rip-stop nylon fabric material.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: August 27, 2002
    Assignee: Her Majesty the Queen in right of Canada as represented by the Solicitor General Acting Through the Commissioner of Royal Canadian Mounted Police
    Inventors: John G. Bureaux, George Cowan, Patricia Mountain, Douglas Eaton, Christopher Corbin
  • Patent number: 6397753
    Abstract: A water-based apparatus for mitigating the gas pressure loading and associated damage and injuries from a fully or partially confined explosion. The water-based apparatus comprises a water-blanket which rests on each pallet of ordnance to mitigate the gas pressure loading from an inadvertent explosion of the ordnance. The water-blanket includes a pair of storage modules, each module comprising a plurality of water storage compartments that store a predetermined quantity of water which is dependent upon the type and quantity of explosive in the ordnance on the pallet. The storage modules are joined by a zipper which allows the modules to be separated for ease in transport.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: June 4, 2002
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: William A. Keenan, Phillip C. Wager
  • Publication number: 20020007753
    Abstract: A water-based apparatus for mitigating the gas pressure loading and associated damage and injuries from a fully or partially confined explosion. The water-based apparatus comprises a water-blanket which rests on each pallet of ordnance to mitigate the gas pressure loading from an inadvertent explosion of the ordnance. The water-blanket includes a pair of storage modules, each module comprising a plurality of water storage compartments that store a predetermined quantity of water which is dependent upon the type and quantity of explosive in the ordnance on the pallet. The storage modules are joined by a zipper which allows the modules to be separated for ease in transport.
    Type: Application
    Filed: September 17, 2001
    Publication date: January 24, 2002
    Inventors: William A. Keenan, Phillip C. Wager
  • Publication number: 20020000173
    Abstract: The present invention relates to a structure of slackening type blasting mat comprising a steel plate member having thickness capable of bearing a blasting pressure of explosive inputted to blasting hole; an elastic member which is fixedly attached by bolt along bottom edge of said steel plate member and isolating what blasting noise and blasting gas and flying away material of explosive inputted into each blasting hole of blasting region are discharged out to exterior; and a weight reinforcing member which is welded to top surface of said steel plate member in a structure as grid window frame, and which is made of steel frame material having heavy weight capable of bearing a blasting pressure.
    Type: Application
    Filed: April 23, 2001
    Publication date: January 3, 2002
    Inventor: Yong-So Cho
  • Patent number: 6332401
    Abstract: The present invention is directed to a method for selecting pressure wave suppression devices from among a menu of pressure wave suppression devices to satisfy the pressure wave requirements of a given job or application. The present invention is further directed to pressure wave suppression devices that can be used in the hole, at or near the opening of the hole, or at a distance from the hole to perform pressure wave and/or flyrock protection. The invention is particularly useful in suppressing airblast and other excavation equipment noise in urban areas.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: December 25, 2001
    Assignee: RockTek Limited
    Inventors: Edward W. Tota, Mihailo Gavrilovic, John D. Watson, Peter N. Georgiou, Jeffrey W. Branson
  • Patent number: 6321655
    Abstract: The present invention is directed to a method for selecting flyrock control devices from among a menu of flyrock control devices to satisfy the flyrock requirements of a given job or application. The present invention is further directed to flyrock devices that can be used in the hole, at or near the opening of the hole, or at a distance from the hole to perform flyrock and/or pressure wave protection. The invention is particularly useful in suppressing flyrock in urban areas.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: November 27, 2001
    Assignee: RockTek Limited
    Inventors: Edward W. Tota, Kevin Mudge, Jeffrey W. Branson, Peter N. Georgiou, Mihailo Gavrilovic, John D. Watson
  • Patent number: 6302026
    Abstract: An explosion-suppressing structure comprises an explosion-suppressing barrier, such as a wall of liquid-filled tanks or blocks, and rupturable explosion-suppressing roof members 23 such as hollow rigid bodies containing liquid-filled bags 24 and supporting further bags 25. In an alternative embodiment, the roof member comprises a net stretched over the barrier.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: October 16, 2001
    Inventor: John Humphries Parkes
  • Patent number: 6289816
    Abstract: A water-based apparatus for mitigating the gas pressure loading and associated damage and injuries from a fully or partially confined explosion. The water-based apparatus comprises a water-blanket which rests on each pallet of ordnance to mitigate the gas pressure loading from an inadvertent explosion of the ordnance. The water-blanket includes a pair of storage modules, each module comprising a plurality of water storage compartments that store a predetermined quantity of water which is dependent upon the type and quantity of explosive in the ordnance on the pallet. The storage modules are joined by a zipper which allows the modules to be separated for ease in transport.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: September 18, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: William A. Keenan, Phillip C. Wager
  • Patent number: 6266926
    Abstract: An apparatus and method for protecting an occupant of a building from flying debris from a frangible structure of the building, such as a window or the like, in the event of an explosion or other blast. A protective barrier is positioned adjacent the building structure and is constructed to be deployed by inflation of at least a portion thereof. The protective barrier is movable from a stored position adjacent the building structure to a deployed position in which it covers the building structure. A gas generating device is connected to the protective barrier and is operable to generate gas to inflate the protective barrier and move it to the deployed position in response to the sensing of an explosion or other blast by a sensing device located remote from the building.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: July 31, 2001
    Assignee: Atlantic Research Corporation
    Inventors: Ward Figge, Kenneth Graham, John Crawford
  • Patent number: 6260464
    Abstract: A structure for the destruction of dangerous materials is described which has a destruction location, which may be a pit below ground level. The destruction pit contains the dangerous materials. At least one durable, sealed membrane is present beneath at least a portion of the destruction pit. An overburden mound of soil is provided above the destruction pit; and at least one shaped explosive charge placed adjacent the dangerous materials capable of subjecting the dangerous materials to crushing detonation forces and high heat for a period of time. After detonation of the explosive charge to destroy the dangerous materials and their containers, such as by pyrolysis, the destruction pit is remediated by removal of the waste products.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: July 17, 2001
    Assignee: Bechtel Corporation
    Inventors: John D. Gorrell, James F. Cullinane, August D. Benz
  • Patent number: 6244155
    Abstract: The present invention relates to a containment structure for containing and mitigating explosions. The containment structure is installed in the wall of the building and has interior and exterior doors for placing suspicious packages into the containment structure and retrieving them from the exterior of the building. The containment structure has a blast deflection chute and a blowout panel to direct over pressure from explosions away from the building, surrounding structures and people.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: June 12, 2001
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Michael H. Sparks
  • Patent number: 6240858
    Abstract: A panel includes a plurality of elongated members in a serpentine configuration under axial compression. The members are adapted to straighten to extend into an opening cut through the panel and the members.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: June 5, 2001
    Inventor: Michael C. Mandall
  • Patent number: 6200664
    Abstract: A barrier for containing an explosion in a room or the like. The barrier is a structural panel comprising a base sheet, a plurality of truncated polyhedral elements secured to and projecting from the base sheet, and a face sheet covering and secured to the truncated apexes of the polyhedral elements. The face sheet is constructed to separate from the polyhedral elements to expose them in the event of an explosion. Each polyhedral element is constructed to collapse in the event of an explosion, is filled with a liquid, and has an opening therein that is closed by a closure device that is openable or removable in response to the collapse of the polyhedral element caused by an explosion. The openings in the polyhedral elements are of a size to effect a misting action of the liquid therein when it is ejected from the openings by the collapse of the polyhedral elements caused by the explosion. The liquid mist serves to absorb and dissipate the heat and energy of the explosion.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: March 13, 2001
    Inventors: Ward Figge, John Crawford
  • Patent number: 6161462
    Abstract: A bulletproof blanket for use with law enforcement vehicles, including a plurality of envelopes containing panels. Each of the panels is fabricated of a lightweight material. Each of the envelopes containing panels has a short lower horizontal edge, an upper edge, and long vertical side edges therebetween. A plurality of flexible connector straps are vertically positioned between adjacent edges of the envelopes. Each of the straps has a first edge coupled to an envelope adjacent one edge and a second edge coupled to an adjacent envelope. In this manner the envelopes containing panels may be positioned in an essentially vertical plane when deployed for operation and use. The envelopes containing panels may also be positioned in a stacked parallel planar array, accordion style, for storage and transportation.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: December 19, 2000
    Inventor: Eric Burton Michaelson
  • Patent number: 6119574
    Abstract: A blast suppression system is provided, with the system including a plurality of command-actuated units located in the immediate vicinity of a bomb, a reservoir of suppressant material, and transmission lines connecting the reservoir to the units. Each of the units provides for the transmission of a suppressant material, preferably water, therethrough. Each of the units has nozzles configured to disperse the suppressant material into the air surrounding the bomb. Preferably, the transmission occurs prior to the explosion of the bomb, and continues after the explosion as well. Each command-actuated unit preferably has associated therewith an adjustable flow rate, an adjustable flow pattern, and an adjustable droplet size. In one embodiment of the invention, the command-actuated units are stationary, while in another embodiment the units are mobile. A method for utilizing the system is also disclosed.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: September 19, 2000
    Assignee: Battelle Memorial Institute
    Inventors: Thomas E. Burky, Donald J. Butz, John S. Butz, Scott M. Golly, Graham H. Alexander
  • Patent number: 5900578
    Abstract: Rock slabs or pieces are broken from larger rocks or from rock formations with reduced cracking of the broken rock slabs or pieces by drilling bore holes along the desired break lines, placing detonating cord into the bore holes, filling the bore holes with a shock transmitting and moderating composition, and detonating the detonation cord. The shock transmitting and moderating composition is preferably a gel with shock absorbing material such as microspheres or micro gas bubbles suspended therein. Openings in rock can also be formed by drilling at least one bore hole within the desired opening and drilling a plurality of bore holes along the desired periphery of the desired opening.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: May 4, 1999
    Inventor: Boyd J. Wathen
  • Patent number: 5780763
    Abstract: A method for severing or weakening materials. Explosive cords are placed in grooves on the upper surface of the material to be severed or weakened. The explosive cords are initiated simultaneously to introduce explosive shock waves into the material. These shock waves progress toward the centerline between the explosive cords and the lower surface of the material. Intersecting and reflected waves produce a rarefaction zone on the centerline to fail the material in tension. A groove may also be cut in the lower surface of the material to aid in severing or weakening the material.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: July 14, 1998
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Morry L. Schimmel, deceased, Laurence J. Bement, Glenn F. DuBrucq, Jr., Edward A. Klein
  • Patent number: 5728967
    Abstract: A method of limiting an environmental disturbance caused by exploding explosive material, comprising spraying liquid to generate a liquid dispersion about the explosive material to be exploded and detonating the explosive material so that it explodes in the dispersion. The invention also relates to an installation for limiting the environmental disturbance of an explosion.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: March 17, 1998
    Inventor: John H. Parkes
  • Patent number: 5719350
    Abstract: This invention relates to the use of at least one rupturable flexible liquid containment device to reduce the effects of explosions. It has applications, inner alia, in the control of "fly" from building demolition, the disposal of munitions, the disposal of used but unexploded weapons and the suppression of terrorist bombs.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: February 17, 1998
    Assignee: John Humphries Parkes
    Inventors: John Humphries Parkes, Stephen Hugh Salter
  • Patent number: 5576511
    Abstract: A highly efficient anti-explosion pad comprising multiple sheets of expanded metal net separated by a core layer of porous material such as fiberglass, cotton batting or an assembly of miniature ellipsoids or balls formed from expanded metal net. When covering a wall or other structural element, the stratiform pad effectively dissipates the shock waves and thermal effects of a close range bomb explosion.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 19, 1996
    Inventor: Shaikh G. M. Y. Alhamad
  • Patent number: 5563364
    Abstract: A highly efficient anti-explosion pad comprising multiple sheets of expanded metal net separated by a core layer of porous material such as fiberglass, cotton batting or an assembly of miniature ellipsoids or balls formed from expanded metal net. When covering a wall or other structural element, the stratiform pad effectively dissipates the shock waves and thermal effects of a close range bomb explosion.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: October 8, 1996
    Inventor: Shaikh G. M. Y. Alhamad
  • Patent number: 5546862
    Abstract: A remote control adaptor for the XM-122 detonator system which utilizes a ir of color coded LED's to indicate the open or closed status of the output terminal of a bistable relay.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: August 20, 1996
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Paul G. Schabdach
  • Patent number: 5524546
    Abstract: A breaching device comprising a regular polygon structure in which identi, rectangular, concave flying plate devices (shape charges) form the sides of the polygon, and a strong, rigid, lightweight structure holds the flying plate devices in position. The flying plate devices are identical and comprise a copper or copper alloy plate having a uniform thickness and a concave front face, a uniform elastomeric material layer attached to and covering the back convex surface of the metal plate, and a uniform layer of high energy plastic-bonded explosive covering the back of the layer of elastomeric material. The flying plate devices are oriented so that when simultaneously fired they fly in trajectories that are parallel to each other and perpendicular to the plane of the polygon.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: June 11, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Alexander G. Rozner, Bernard P. Howder
  • Patent number: 5482754
    Abstract: A multi-purpose rubber mat comprising strips of rubber material having a top and bottom sides and edge portion; said strips laid together whereby the top side of one abuts the bottom side of another; and said laid together strips threaded and held together to form a barrier surface to contain flying objects.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: January 9, 1996
    Inventor: Carol A. Crook
  • Patent number: 5437230
    Abstract: An unpowered air vehicle, i.e. a glider, which is air-launched from appreciable range, is densely packed with a large area, explosive net. At a pre-determined location, the net is extracted from the glider by a parachute and expanded completely before landing on the surface of the water or land that contains a large field of mines. The explosive material in the net is then detonated, destroying the mines covered by the net. The longitudinal ends of the net are attached to a folding, multi-arm framework designed to expand and thereby spread the net after separation from the glider. The spreading action is initiated by an extraction parachute which pulls the first frame from the air vehicle. The spreading action is completed by the second frame which is coupled to a brake mechanism in the glider that maintains tension throughout the net to complete the spreading of the net.
    Type: Grant
    Filed: March 8, 1994
    Date of Patent: August 1, 1995
    Assignee: Leigh Aerosystems Corporation
    Inventors: Gordon L. Harris, Stephen L. Harris, Neil A. Levy
  • Patent number: 5394786
    Abstract: An acoustic/shock wave attenuating assembly comprised of porous screens forms an enclosure filled with a suitable pressure wave attenuating medium or material having fluid characteristics. This basic configuration can be suspended or held in place by a rigid structure. When the pressure attenuating medium is a liquid, the attenuating assembly is provided with a lining for containment. Multiple attenuating assemblies can be employed, with adjacent attenuating assemblies separated by a small gap. The pressure attenuating medium may be a liquid, a gas emulsion, an aqueous foam, or a gel (with or without entrained gas). Alternatively, solid particulates having bulk mechanical properties of a fluid may be employed as the pressure wave attenuating medium and may have an adhesive or the like resisting relative movement between particulates to simulate viscous effects.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: March 7, 1995
    Assignee: Suppression Systems Engineering Corp.
    Inventors: Guy L. Gettle, Vincent H. Homer, Jr.
  • Patent number: 5386779
    Abstract: A blast attenuator and ventilator for use in hardened or protective structures or the like that includes within a hollow housing a chamber that is arranged to receive directly the blast effect. Adequate openings for gas flow are provided so that appropriate gas flow for ventilation can occur therethrough.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: February 7, 1995
    Assignee: Wilfred Baker Engineering, Inc.
    Inventor: Quentin A. Baker
  • Patent number: 5249534
    Abstract: A cover for use with a container (1) comprises one or more layers (11, 12, 15) of high tensile strength, high stretch resistance flexible material which are capable of resisting penetration by bomb blast and fragmentation and which are adapted so that the cover can expand and absorb and/or channel the blast from within the container (1). For this purpose, the layers of flexible material are interconnected by hook-and-eye type fabric fasteners, which can give or release under load to allow controlled expansion of the cover in the event of an explosion. The container may be the type used to carry cargo or luggage on an aircraft and placing the cover (11, 12, 15) about the container a bomb secreted in the luggage or cargo will be prevented from destroying the aircraft.
    Type: Grant
    Filed: January 9, 1992
    Date of Patent: October 5, 1993
    Assignee: Dowty Armourshield Limited
    Inventor: Michael Sacks