Accidental Fuse Ignition Prevention Means Patents (Class 102/202.1)
  • Patent number: 9851191
    Abstract: A downhole explosive detonation comprises a high voltage electro-explosive initiator comprising an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. Explosive is initiated in a direction approximately parallel, or in another version perpendicular to the capacitor discharge unit. A unique configuration and construction of the assembly allows installation through a small service port in the gun housing structure for more efficient gun arming. A real time downhole voltage monitoring is described that transmits voltage readings to the surface during a firing sequence.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: December 26, 2017
    Assignee: Hunting Titan, Inc.
    Inventors: Nolan C. Lerche, James E. Brooks
  • Patent number: 9581422
    Abstract: According to an aspect, a perforating gun assembly and a detonator assembly are provided. The detonator assembly includes at least a shell, and more than one electrically contactable component that is configured for being electrically contactably received by the perforating gun assembly without using a wired electrical connection, but rather forms the electrical connection merely by contact with at least one of the more than one electrically contactable components. According to an aspect, the detonator assembly includes a selective detonator assembly. A method of assembling the perforating gun assembly including the detonator assembly is also provided.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: February 28, 2017
    Assignee: DynaEnergetics GmbH & Co. KG
    Inventors: Frank Haron Preiss, Thilo Scharf, Liam McNelis
  • Patent number: 9470498
    Abstract: A pressure switch is provided to arm a munition's fuze mechanism upon launch. The switch operation is based upon extreme gas pressures experienced during launch of the munition. The switch includes a piston contained in a housing. The piston translates due to launch pressures. The piston translation then causes a copper puck component to contact nearby electrical stab pins, to close a circuit. The closed circuit is then used to electrically arm the fuze mechanism.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: October 18, 2016
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Jason Cahayla, Jesse Sunderland
  • Patent number: 9316199
    Abstract: An ignition device (100) includes a power supply (2) for discharge; an AC power supply (3); an ignition coil (41) for generating a secondary voltage in a secondary coil (41B); an ignition plug (1) connected to the secondary coil (41B); an AC electrode (43) electrically connected to the AC power supply (3); a high-voltage electrode (42) located between the secondary coil (41B) and the ignition plug (1); an insulator (44) located between the two electrodes (42, 43); and a second insulator (47) which covers the ignition coil (41) and a capacitor (49) composed of the two electrodes (42, 43) and an insulator (44). The secondary voltage and AC power are supplied to the ignition plug (1) via the high-voltage electrode (42). Thus, excellent ignition performance can be implemented while the occurrence of misfire is restrained.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: April 19, 2016
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Tatsunori Yamada, Kohei Katsuraya, Katsutoshi Nakayama
  • Patent number: 9284843
    Abstract: A method and apparatus for safely handling an undesired blade event in an open rotor engine system. In one illustrative embodiment, an occurrence of an undesired blade event in an open rotor engine system is detected. Electrical energy is allowed to flow into a conductor embedded in the blade in response to the undesired blade event. The conductor is vaporized when the electrical energy flowing through the conductor heats the conductor to a temperature above a selected threshold.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 15, 2016
    Assignee: THE BOEING COMPANY
    Inventor: William John Koch, IV
  • Patent number: 8875631
    Abstract: A method for igniting a thermal battery upon a predetermined acceleration event. The method including: rotatably connecting a striker mass to a base; aligning a first projection on the striker mass with a second projection on the base such that when the striker mass is rotated towards the base, the first projection impacts the second projection; and preventing impact of the first and second projections unless the predetermined acceleration event is experienced.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: November 4, 2014
    Assignee: Omnitek Partners LLC
    Inventors: Jahangir S. Rastegar, Thomas Spinelli
  • Publication number: 20140076189
    Abstract: A hand-throwable grenade including a detonator initiating mechanism, a detonator and a locking key. The detonator initiating mechanism is activatable by an operator before the grenade is thrown. The detonator is associated with the detonator initiating mechanism. The locking key interacts with the detonator initiating mechanism to preclude an arming of the detonator until the locking key is removed from the detonator initiating mechanism. The locking key has at least one notch therein.
    Type: Application
    Filed: August 3, 2012
    Publication date: March 20, 2014
    Inventor: Gregory K. Wierenga
  • Publication number: 20140076185
    Abstract: A method for actuating an inertial igniter. The method including: moving a mass contained within an interior of a body towards one of a pyrotechnic material or primer when an all-fire acceleration profile is experienced; hermetically sealing the interior of the body from an outside environment; restraining the movable mass from contacting the one of the pyrotechnic material or primer for acceleration profiles less than the all-fire acceleration profile; at least indirectly blocking the movable mass from movement towards the one of the pyrotechnic material or primer under acceleration profiles equal to or greater than the all-fire acceleration profile; and manually removing the blocking such that the movable mass can move towards and contact the one of the pyrotechnic material or primer when the all-fire acceleration profile is experienced to actuate the inertial igniter.
    Type: Application
    Filed: September 16, 2012
    Publication date: March 20, 2014
    Inventor: Jahangir S. Rastegar
  • Patent number: 8676448
    Abstract: An occupant protection device includes (i) an electronic control unit having a control board, (ii) a parallel connection bus having two lines, (iii) multiple satellite sensors connected to the parallel connection bus, (iv) a squib connected to the parallel connection bus, and (v) an accident prevention diode located close to the squib. The control board includes an interface and a processor. Each of the satellite sensors includes a distributed system interface which is located between the two lines. The parallel connection bus is supplied with a sensor drive voltage. The electronic control unit starts to operate at least one of the occupant protection portions based on a result of the collision determination by the control board.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: March 18, 2014
    Assignee: Denso Corporation
    Inventor: Shinji Ooyabu
  • Patent number: 8661978
    Abstract: A detonator system is provided for use with explosives that utilizes two subsystems. A first subsystem functions as a non-explosives based detonator, which does not contain any explosives. The second subsystem is an initiating subsystem, which includes an initiating pellet. To set off an explosive event, the non-energetics based detonator is coupled to the initiating subsystem and the non-energetics based detonator is commanded to provide a suitable signal to the initiating subsystem that is sufficient to function the initiating pellet. Further, the initiating subsystem can be integrated directly into an associated explosive such as a booster that has been configured to receive the initiator subsystem without changing the hazard class of the booster.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: March 4, 2014
    Assignee: Battelle Memorial Institute
    Inventors: Roger F. Backhus, Richard W. Givens, Jerome A. Klein, Ronald L. Loeser, Jason E. Paugh, Walter G. VanCleave, III, Isaac Thomas Zimmer
  • Patent number: 8651022
    Abstract: An inertial igniter for igniting a thermal battery upon a predetermined acceleration event is provided. The inertial igniter including: a base having a first projection; a striker mass rotatably connected to the base through a rotatable connection, the base having a second projection aligned with the first projection such that when the striker mass is rotated towards the base, the first projection impacts the second projection; and a rotation prevention mechanism for preventing impact of the first and second projections unless the predetermined acceleration event is experienced.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: February 18, 2014
    Assignee: Omnitek Partners, LLC
    Inventors: Jahangir S. Rastegar, Richard T. Murray, Thomas Spinelli
  • Patent number: 8516963
    Abstract: A system and method are disclosed for controlling the launch and burst of pyrotechnic projectiles in a pyrotechnic, or “fireworks”, display.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: August 27, 2013
    Assignee: MagicFire, Inc.
    Inventors: George Bossarte, Paul R. McKinley
  • Publication number: 20120205225
    Abstract: A method for igniting a thermal battery upon a predetermined acceleration event. The method including: rotatably connecting a striker mass to a base; aligning a first projection on the striker mass with a second projection on the base such that when the striker mass is rotated towards the base, the first projection impacts the second projection; and preventing impact of the first and second projections unless the predetermined acceleration event is experienced.
    Type: Application
    Filed: August 10, 2011
    Publication date: August 16, 2012
    Applicant: OMNITEK PARTNERS LLC
    Inventors: Jahangir S. Rastegar, Thomas Spinelli
  • Publication number: 20120152102
    Abstract: A system for mitigating the effects of an unexpected explosion against a surface is described and claimed. This invention comprises at least one containment vessel containing explosive material fitted with a detonator; and at least one sensing device that can ignite the detonator; or, in another embodiment, a computer interposed between sensing devices and a plurality of detonators to optimize the response. Because transient voltages from a high-voltage firing system can accidentally ignite the detonators, a safety switch driven by an EBW detonator is interposed between the firing system and the counter-explosive devices. The explosive force generated by the current invention attenuates the shockwave and deflects the shrapnel from the unexpected explosion. In various embodiments, this counter-explosive device can be adapted to protect a multiplicity of surface types including exterior vehicle surfaces, building facades, bridges, embassies and military checkpoints and guard stations.
    Type: Application
    Filed: January 21, 2011
    Publication date: June 21, 2012
    Inventor: Jack Joseph Tawil
  • Patent number: 8161878
    Abstract: A safety and arming unit for a fuze of a projectile has a rotor for interruption of a firing chain. The rotor can rotate from a safe position to an armed position. In order to allow the safety and arming unit to be designed to be physically compact and such that it can be assembled easily, it is proposed that it has a first and a second rotor safety device which each engage in the rotor in order to block rotor rotation to the armed position, wherein the first rotor safety device is designed to carry out a release movement by virtue of its inertia during a launch acceleration of the projectile, and the second rotor safety device has a pyrotechnic charge for producing a release movement.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: April 24, 2012
    Assignee: Junghans Microtec GmbH
    Inventors: Andreas Schellhorn, Frank Martin Kienzler, Martin Leonhardt
  • Patent number: 8113119
    Abstract: An explosive tool is disclosed. The explosive tool comprises a body structure, a charge, a detonator to ignite the charge via propagation of thermal energy, a pressure actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to a surface pressure and to not prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to at least a predefined pressure threshold, and a temperature actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to a surface temperature and to not prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to at least a predefined temperature threshold. The charge, the detonator, the pressure actuated safety, and the temperature actuated safety are contained within the body structure.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: February 14, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Donald L. Crawford
  • Publication number: 20110308414
    Abstract: An electronic ignition safety device configured to reject signals below a predetermined ‘all-fire’ voltage includes an exploding foil initiator having an electrical input and an output end, and an electronic fireset electrically connected to the electrical input of the exploding foil initiator. The device also includes a through bulkhead initiator (TBI) body, a donor charge disposed adjacent the output end of the exploding foil initiator, and an acceptor charge. The device further includes an integral barrier disposed between the donor charge and the acceptor charge, and one or more of the donor charge, the acceptor charge, and/or the integral barrier being disposed within a component part that is assembled to the TBI body. The device also includes an output charge disposed adjacent the acceptor charge.
    Type: Application
    Filed: July 29, 2011
    Publication date: December 22, 2011
    Applicant: Ensign-Bickford Aerospace & Defence Company
    Inventor: John A. Sudick
  • Publication number: 20110297029
    Abstract: Inertial igniters for initiating a thermal battery and methods of preventing initiation of an inertial igniter are provided. The method including: biasing a mass element from a base element with a spring element connecting the mass element and the spring element; and removably disposing a safety member between the mass element and the base element to prevent relative movement between the mass element and base element to prevent accidental initiation of the inertial igniter. The method can further comprise removing the safety member prior to subjecting the inertial igniter to all-fire conditions.
    Type: Application
    Filed: June 6, 2010
    Publication date: December 8, 2011
    Applicant: OMNITEK PARTNERS LLC
    Inventors: Jahangir S. Rastegar, Richard T. Murray
  • Patent number: 8042472
    Abstract: The invention relates to cartridged ammunition, particularly blank ammunition, having a cartridge shell (3) and a projectile (2) placed therein. A propellant chamber (4) accommodating a pyrotechnic of a propellant charge (5) is disposed in the cartridge shell, such charge being ignitable by an ignition device (13) also containing pyrotechnic material that generates propellant gases that act on the base (8) of the projectile and propel the shot out of the cartridge shell. In order to prevent the pyrotechnic charges of the propellant charge and/or the ignition device from self-igniting at high ambient temperatures, particularly in a fire, thus tearing apart the cartridge shell and projectile and being flung away, an inert, meltable material is mixed into the pyrotechnic charges of the propellant charge and/or the ignition device.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: October 25, 2011
    Assignee: Rheimentall Waffe Munition GmbH
    Inventor: Thorsten Lübbers
  • Patent number: 7987787
    Abstract: An electronic ignition safety device configured to reject signals below a predetermined ‘all-fire’ voltage comprising an exploding foil initiator having an electrical input and an output end, a pickup comprising a secondary explosive donor charge adjacent to the exploding foil initiator's output end and separated from a secondary explosive acceptor charge by an integral barrier, and an output charge adjacent to the acceptor charge.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: August 2, 2011
    Assignee: Ensign-Bickford Aerospace & Defense Company
    Inventor: John A. Sudick
  • Patent number: 7930975
    Abstract: A deconfinement device for the casing of a piece of ammunition enclosing an explosive load able to be ignited by a priming fuse, said device comprising a connecting ring linked to the casing and enabling the priming fuse to be joined to said casing, wherein said device incorporates a structure to ensure a weakened and shearable link between said fuse and said connecting ring, said link being sheared further to an increase in the pressure inside said casing, said connecting ring incorporating a base forming a plate that can be projected onto said explosive load during the ignition of said fuse, said base being able to be fractured by the presence of pressure inside said body of said projectile.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: April 26, 2011
    Assignee: Nexter Munitions
    Inventors: Stéphane Cotet, Laurent Desgland, Dominique Dion
  • Patent number: 7866263
    Abstract: A glass-metal feed-through transmits an electrical signal from one face to another face that is opposite. The feed-through includes a glass plug, two metal pins passing through the plug, and a metal part surrounding the plug. The feed-through includes an electrically-conductive link between a first of the pins and the part. The link includes a brazing preform secured to the first pin and to the part.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: January 11, 2011
    Assignee: Autoliv Development AB
    Inventors: Alain Magne, Adelino Carrol, Grégory Minuzzo
  • Publication number: 20100282105
    Abstract: An initiator including a housing adapted to be received in an igniter or rocket motor, at least one charge at a distal end of the housing, an electro-explosive device behind the charge for detonating the charge when subject to a voltage HV, and a pressure bulkhead behind the electro-explosive device. An electronic subsystem in the housing is connected to the electro-explosive device through the bulkhead and includes a lead for providing the voltage HV to the electro-explosive device to initiate it, and a switch in the lead which does not conduct if errant voltages are present on the lead to prevent initiation of the electro-explosive device until the correct voltage HV is present.
    Type: Application
    Filed: October 23, 2007
    Publication date: November 11, 2010
    Inventors: Barry Neyer, Daniel Raymond Knick, Paul Thomas Moore, Robert Tomasoski
  • Publication number: 20100242771
    Abstract: A system and method are disclosed for controlling the launch and burst of pyrotechnic projectiles in a pyrotechnic, or “fireworks”, display.
    Type: Application
    Filed: November 16, 2009
    Publication date: September 30, 2010
    Inventors: George Bossarte, Glenn W. Dillon, Paul R. McKinley, Wayne C. Haase, Larry G. Nelson
  • Patent number: 7762331
    Abstract: A process is disclosed for assembling a loading tube for a perforating gun for use in a perforating system. At a first location, e.g., a shop, which is not the location at which perforating operations will be conducted, the loading tube is completely assembled. The completely assembled loading tubing is then transported to a second location where perforating operations are to be conducted. In one embodiment, an RF-safe initiator, wiring, a detonating cord and a plurality of shaped charges are installed into the loading tube at a first location. The RF-safe initiators may comprise an exploding foil initiator or an exploding bridge wire. A process for assembling a loading tube for a single-shot perforating gun is also disclosed.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: July 27, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Kenneth Goodman, Michael Bertoja, Luis Ochoa
  • Patent number: 7755878
    Abstract: A blast key which includes a body and a blast energy generator in or on the body. The blast key may include a body in the form of a small housing and may further comprise a switch connected to the energy generator.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: July 13, 2010
    Assignee: Detnet South Africa (PTY) Ltd.
    Inventors: Riaan Lingenfelder Van Wyk, Graham A. Garside
  • Patent number: 7748323
    Abstract: There is provided a semiconductor bridge device wherein a reaction time for generating sparks is short and a spark generating amount is large. This semiconductor bridge device comprises a substrate, a pair of land portions, a bridge portion electrically connecting between the pair of the land portions, and an electrode pad arranged on each upper surface in the pair of the land portions and emitting sparks at the bridge portion through an electric current passed between the electrode pads, in which the pair of the land portions and the bridge portion consist of a laminate formed by alternately laminating a metal layer and a metal oxide layer plural times, and an outermost layer in the laminate is a metal layer, and a metal oxide having a decomposition temperature of higher than 1500° C. is used in the metal oxide layer.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: July 6, 2010
    Assignee: Nipponkayaku Kabushikikaisha
    Inventors: Shigeru Maeda, Hirotaka Mukunoki
  • Patent number: 7726243
    Abstract: A parachute flare igniter assembly includes a novel safety for arresting the motion of a slider when subjected to external forces, but allows slider motion when subjected to intended cable actuation forces. The igniter safety includes a housing, a slider, a cable and a sleeve. The slider, connected to the cable, is slidably received within the housing. The cable moves the slider by applying a cable force conventionally obtained by actuation of a parachute associated with the flare and connected to an end of the cable opposite an end connected to the slider. The sleeve is connected to the cable and is disposed between the housing and the slider, so that the sleeve will arrest the slider with respect to the housing when the cable force is not present. A flare and a method of providing a safety in an igniter assembly is also provided.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: June 1, 2010
    Assignee: Alliant Techsystems Inc.
    Inventors: Kevin W. Richards, Kendall Dye, Robert G. Jones
  • Patent number: 7686325
    Abstract: A gas generator for filling an airbag of a vehicle is provided. The gas generator can be integrated into the vehicle in such a way that it is electrically insulated from the same, and can be directly connected to the electrical ground of the vehicle, especially to a defined ground potential, by means of a separate ground connection. The separate ground connection thus provides an improved ground connection of the gas generator.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: March 30, 2010
    Assignee: Takata-Petri AG
    Inventors: David Retallick, Jens Eckle, Martin Schwann, Lothar Maurer
  • Patent number: 7661362
    Abstract: An igniter assembly that includes a housing, a secondary explosive input charge, a pyrotechnic output charge and a barrier system that is disposed between the input charge and the pyrotechnic output charge. The barrier system shields the pyrotechnic output charge from energy released by the input charge to prevent the output charge from being cooked-off or initiated unless the input charge is detonated.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: February 16, 2010
    Assignee: Reynolds Systems, Inc.
    Inventors: George N Hennings, Richard K Reynolds, Christopher J Nance
  • Publication number: 20100005992
    Abstract: An explosive tool is disclosed. The explosive tool comprises a body structure, a charge, a detonator to ignite the charge via propagation of thermal energy, a pressure actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to a surface pressure and to not prevent propagation of sufficient thermal energy to ignite the charge when the pressure actuated safety is subjected to at least a predefined pressure threshold, and a temperature actuated safety to prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to a surface temperature and to not prevent propagation of sufficient thermal energy to ignite the charge when the temperature actuated safety is subjected to at least a predefined temperature threshold. The charge, the detonator, the pressure actuated safety, and the temperature actuated safety are contained within the body structure.
    Type: Application
    Filed: July 11, 2008
    Publication date: January 14, 2010
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Donald L. Crawford
  • Patent number: 7640857
    Abstract: A tool for use in a wellbore has an activation assembly, which has a support structure and a reactive layer on the support structure. The reactive layer is formed of a pyrotechnic material. The activation assembly also includes an electrically conductive protective layer covering the reactive layer to protect the reactive layer from electrical discharge. The tool further includes a component to be activated by the activation assembly.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: January 5, 2010
    Assignee: Schlumberger Technology Corporation
    Inventor: Philip Kneisl
  • Publication number: 20090293751
    Abstract: A blasting system (10) in which detonators (12) are connected to a blast energy source (30) by means of a component (42) which forms part of the blasting system (10) and which is physically movable to a safe position, visually ascertainable by an operator, at which detonator (12) firing cannot take place if an unwanted or unsafe condition arises in the blasting system (10).
    Type: Application
    Filed: August 7, 2009
    Publication date: December 3, 2009
    Inventor: Riaan Lingerfelder Van Wyk
  • Patent number: 7617777
    Abstract: A system and method are disclosed for controlling the launch and burst of pyrotechnic projectiles in a pyrotechnic, or “fireworks”, display.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: November 17, 2009
    Assignee: MagicFire, Inc.
    Inventors: George Bossarte, Glenn W. Dillon, Paul R. McKinley, Wayne C. Haase, Larry G. Nelson
  • Publication number: 20080276818
    Abstract: A shock tube initiator (STI) for allowing the remote and/or manual initiation of at least one shock tube, typically two shock tubes is disclosed.
    Type: Application
    Filed: December 1, 2003
    Publication date: November 13, 2008
    Applicant: MAS ZENGRANGE (NZ) LTD
    Inventors: Roger Ballantine, Anthony Paul Hornbrook, Ian Moore, Dave Norman Hamilton
  • Patent number: 7430963
    Abstract: An igniter assembly with a housing, an initiator, an input charge, a first barrier, a second barrier, and an output charge. The input charge is formed of a secondary explosive and disposed adjacent the initiator. The first barrier cooperates with the housing to form a chamber into which the input charge is received. The second barrier is disposed on a side of the first barrier opposite the input charge and combusts in response to energy released during detonation of the input charge. The output charge is formed of a pyrotechnic material and disposed on a side of the second barrier opposite the first barrier. The output charge can combust in response to energy released during combustion of the second barrier. The housing and the first barrier cooperate to isolate the output charge from heat and pressure generated by the input charge if the input charge is cooked-off.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: October 7, 2008
    Assignee: Reynolds Systems, Inc.
    Inventors: George N. Hennings, Richard K. Reynolds, Christopher J. Nance
  • Publication number: 20080238058
    Abstract: The present invention provides an actuator including: a cylinder connected to an ignition device; a piston slidably accommodated inside the cylinder, the piston having, in a desired section in the length direction, an enlarged diameter portion in which an outer diameter is enlarged; a cylindrical stopper attached to an inner peripheral surface of the cylinder, the stopper including, a main body portion which is fixed to the inner peripheral surface of the cylinder, and a nail portion which inwardly projects from the main body portion and is formed of an elastic material, wherein before activation of the ignition device, the piston is inhibited from moving in an axial direction by causing the nail portion to contact a part of the enlarged diameter portion, after activation of the ignition device, the piston is inhibited from moving in a backward direction by causing the nail portion to contact another part of the enlarged diameter portion.
    Type: Application
    Filed: December 19, 2007
    Publication date: October 2, 2008
    Applicant: DAICEL CHEMICAL INDUSTRIES, LTD.
    Inventors: Kenji NUMOTO, Mikio Yabuta
  • Publication number: 20080110364
    Abstract: A parachute flare igniter assembly includes a novel safety for arresting the motion of a slider when subjected to external forces, but allows slider motion when subjected to intended cable actuation forces. The igniter safety includes a housing, a slider, a cable and a sleeve. The slider, connected to the cable, is slidably received within the housing. The cable moves the slider by applying a cable force conventionally obtained by actuation of a parachute associated with the flare and connected to an end of the cable opposite an end connected to the slider. The sleeve is connected to the cable and is disposed between the housing and the slider, so that the sleeve will arrest the slider with respect to the housing when the cable force is not present. A flare and a method of providing a safety in an igniter assembly is also provided.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 15, 2008
    Inventors: Kevin W. Richards, Kendall Dye, Robert G. Jones
  • Publication number: 20070193465
    Abstract: A bore seal is includes a polymeric interface portion adapted for coupling to an initiator activation signal transmission medium, and an initiator-receiving portion adapted for receiving an initiator therein. The bore seal generally houses a pyrotechnic initiator or igniter therein, for incorporation into a gas generating system or other system having a pyrotechnically actuatable element.
    Type: Application
    Filed: February 20, 2007
    Publication date: August 23, 2007
    Inventor: Bruce A. Stevens
  • Patent number: 7194959
    Abstract: A system and method are disclosed for controlling the launch and burst of pyrotechnic projectiles in a pyrotechnic, or “fireworks”, display.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: March 27, 2007
    Assignee: MagicFire, Inc.
    Inventors: George Bossarte, Glenn W. Dillon, Paul R. McKinley, Wayne C. Haase, Larry G. Nelson
  • Patent number: 7125041
    Abstract: An igniter includes: an igniter assembly including an igniter main body having an ignition portion adapted to be ignited by an ignition electric current; an igniter collar which accommodates the igniter main body; a cup body having an opening portion, the igniter assembly and the cup body being connected to each other, such that at least the ignition portion of the igniter main body is surrounded by the cup body; and a tubular crimp case that connects and fastens at least a part of an exterior surface of the igniter collar and at least a part of an exterior surface of the cup body from an outside.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: October 24, 2006
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kazuhiro Kato, Shingo Oda, Hiroshi Harada, Ryohei Yamada
  • Patent number: 7111558
    Abstract: The invention relates to a pyrotechnic detonator with an igniter support of plastic, which bears an ignition element. A cylindrical metal housing is fastened to the igniter support, into which the ignition reaches. A booster charge is arranged in the metal housing. To improve seal tightness and lower the manufacturing costs, for mechanical support a metal insert is integrated into the igniter support, the metal insert being encased by the plastic of the igniter support.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: September 26, 2006
    Assignee: Delphi Technologies, Inc.
    Inventors: Uwe Brede, Eduard Berenz, Anton Bretfeld, Harald Frank, Jurgen Knauss
  • Patent number: 7021218
    Abstract: A safety and performance enhancement arrangement for primary explosive detonators. This arrangement involves a circuit containing an energy storage capacitor and preset self-trigger to protect the primary explosive detonator from electrostatic discharge (ESD). The circuit does not discharge into the detonator until a sufficient level of charge is acquired on the capacitor. The circuit parameters are designed so that normal ESD environments cannot charge the protection circuit to a level to achieve discharge. When functioned, the performance of the detonator is also improved because of the close coupling of the stored energy.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: April 4, 2006
    Assignee: The Regents of the University of California
    Inventor: Ronald W. Davis
  • Patent number: 6857369
    Abstract: A system and method are disclosed for controlling the launch and burst of pyrotechnic projectiles in a pyrotechnic, or “fireworks”, display.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: February 22, 2005
    Assignee: Magic Fire, Inc.
    Inventors: George Bossarto, Glenn W. Dillon, Paul R. McKinley, Wayne C. Haase, Larry G. Nelson
  • Patent number: 6851369
    Abstract: Blasting apparatuses and methods control actuation of a plurality of detonators, and involve the use of one or more authorization keys each associated with a blasting machine. The authorization key(s) are transferable from the blasting machine(s) to a central command station, each authorization key storing a data package comprising a randomly generated access code generated by its corresponding blasting machine. Transfer of the one or more authorization keys to a central command station allows the data packages (and associated randomly generated access codes) to be transmitted by the central command station for receipt by the blasting machine(s).
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: February 8, 2005
    Assignee: Orica Explosives Technology PTY Ltd.
    Inventors: Dirk Hummel, Olaf Cramer
  • Patent number: 6848713
    Abstract: A gas generator for an air bag comprises: a housing having a gas discharging port; an initiator assembly provided with a first igniter and a second igniter mounted to the housing via a holder, each of the first igniter and the second igniter including a priming activated upon an impact, the second igniter having, a center pin connected to an external power supply to constitute a positive electrode, a grounding pin connected to a metal portion of a motor vehicle to constitute a negative electrode, and an opening-shutting device of current provided between the center pin and the external power supply; and gas generating material ignited and burnt by the initiator assembly.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: February 1, 2005
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yoshihiro Nakashima, Nobuyuki Katsuda
  • Patent number: 6796245
    Abstract: A unitary header/base/shorting bar holder for a micro gas generator; and a micro gas generator containing it.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: September 28, 2004
    Assignee: LifeSparc, Inc.
    Inventors: Todd S. Parker, Michael D. Campbell
  • Patent number: 6732656
    Abstract: A fiber-optically-and-pneumatically-controlled firing set for explosive-bridgewire detonators. The firing set consists of a detonation-controlling module and a battery-operated firing module that are interconnected by fiber-optic signal conductors and a pneumatic conduit. The firing set provides high voltage isolation between the control module and the firing module while employing redundant safety features including fail-safe pneumatic crowbar shunting of the firing module output, frequency-selective fiber-optic signal communication, controlled battery life and explosive material detonation enablement and multiple, fail-safe serial switching to control the energy transfer sequence in the firing module. Both high voltage and low potential uses of the invention are included.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: May 11, 2004
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Mark W. Heyse, Ronald E. Stearns, Marcus A. Cash
  • Patent number: 6732655
    Abstract: A firing device, in which electrostatic chargings do not lead to an unintentional triggering of the firing element, is composed of a module housing in which a firing element and a circuit means arrangement are arranged, and which has terminal posts that, on the one side, are contacted to the circuit arrangement, and on the other side, are brought out from the module housing for the connection to a plug connector. The firing device includes at least one conductive member that is contacted to the firing capsule and that has a defined distance to the individual terminal posts, such that, in response to an electrical charging, a voltage sparkover occurs between the terminal posts and the conductive member.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: May 11, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Gert Jakob, Werner Nitschke, Ralf Hauser, Martin Zywietz
  • Patent number: 6675692
    Abstract: The invention relates to a pyrotechnic actuator that comprises a housing (1) with a cavity (5) in which a piston (2) is displaceably received. Said piston (2) can be adjusted from an initial position to a terminal position by means of a gas quantity that is produced when an explosive is ignited. Said piston (2) triggers a mechanical action on its path towards the terminal position or once it reaches the terminal position while at least one snap-in element and/or one spring-elastic retaining element (2z, 8) retains the piston in the initial position.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: January 13, 2004
    Inventor: Coenen Goetz