With Nitrated Organic Compound Patents (Class 149/38)
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Patent number: 9469573Abstract: This invention relates to a method of manufacturing a salt-coated heat paper, including preparing a powder mixture by mixing a fuel powder with an oxidant powder; preparing a slurry by adding an organic coagulant, after mixing the powder mixture with glass fibers; obtaining a heat paper by a papermaking process utilizing the slurry; primarily drying the heat paper by pressing; coating the heat paper with a salt solution; and secondarily drying the heat paper.Type: GrantFiled: October 28, 2014Date of Patent: October 18, 2016Assignee: AGENCY FOR DEFENSE DEVELOPMENTInventors: Chaenam Im, Jungmin Lee, Seungho Kang, Haewon Cheong
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Publication number: 20150096653Abstract: An autoignition composition for a gas generant for an airbag or the like. The autoignition comprises a mixture of CuO as the oxidizer in a weight percentage of 45% to 75%, and aminoguanidine nitrate as the fuel in a weight percentage of 25% to 55%. To increase the flame temperature of the mixture, a metal fuel such as magnesium or aluminum can be added.Type: ApplicationFiled: October 4, 2013Publication date: April 9, 2015Applicant: ARC AUTOMOTIVEInventors: James Michael ROSE, Russell Klaus Campbell
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Publication number: 20140116584Abstract: The main subject of the present invention is solid pyrotechnic gas generator compounds, the composition of which contains: guanidine nitrate, basic copper nitrate, and at least one inorganic titanate, the melting point of which is above 2100 K. Said compounds are perfectly suitable for use in frontal airbags.Type: ApplicationFiled: May 9, 2012Publication date: May 1, 2014Applicant: HERAKLESInventors: Frédéric Marlin, Stéphane Besombes
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Patent number: 8685187Abstract: Disclosed are thermite charges for use in well perforation and downhole fracing. The thermite charges have a core, and optionally a case, where at least one of the core and the case includes thermite material.Type: GrantFiled: February 24, 2010Date of Patent: April 1, 2014Assignee: Schlumberger Technology CorporationInventors: Chenghua Han, Hongfa Huang
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Patent number: 8470107Abstract: A non-toxic, non-hydroscopic percussion primer composition and methods of preparing the same, including at least one explosive component that has been traditionally considered a moderately insensitive explosive or secondary explosive, and at least fuel particle component having a particle size of about 1.5 microns to about 12 microns, which allows the use of moderately active metal oxidizers. The sensitivity of the primer composition is created by the interaction between the moderately insensitive explosive and the fuel agent such that traditional primary explosives such as lead styphnate or DDNP are not needed. The primer composition also eliminates the risks and dangers associated with traditional nano-sized fuel particles.Type: GrantFiled: May 22, 2012Date of Patent: June 25, 2013Assignee: Alliant Techsystems Inc.Inventors: Joel Sandstrom, Aaron A. Quinn, Jack Erickson
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Patent number: 8460486Abstract: A percussion primer composition that comprises an explosive and a sensitizer, the explosive being a moderately insensitive explosive having an impact sensitivity in the range from about 0.3 kp m to about 0.75 kp m. The moderately insensitive explosive may comprise CL-20, PETN, RDX, HMX, or mixtures thereof. The sensitizer may comprise aluminum, titanium, zirconium, magnesium, melamine, styrene, lithium aluminum hydride, or mixtures thereof. In some instances, the percussion primer composition may comprise the moderately insensitive explosive precipitated onto the sensitizer. The percussion primer composition may contain an oxidizer, which in certain situations comprises a conventional oxidizer or a bismuth compound. The bismuth compound is bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, or mixtures thereof. A gun cartridge and other primer-containing ordnance assemblies employing the percussion primer composition are also disclosed.Type: GrantFiled: May 22, 2012Date of Patent: June 11, 2013Assignee: Alliant Techsystems Inc.Inventors: Harold E. Johnston, Kristin F. Warner, Reed J. Blau, Scott K. Lusk
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Patent number: 8454769Abstract: A percussion primer composition including at least one explosive, at least fuel particle having a particle size of about 1500 nm or less, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same.Type: GrantFiled: April 26, 2012Date of Patent: June 4, 2013Assignee: Alliant Techsystems Inc.Inventors: Jack Erickson, Joel L. Sandstrom, Gene Johnston, Neal Norris, Patrick Braun, Reed Blau, Lisa Spendlove Liu, Rachel Hendrika Newell
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Patent number: 8454770Abstract: A percussion primer composition including at least one explosive, at least one nano-coated fuel particle having natural surface oxides thereon, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same.Type: GrantFiled: May 16, 2012Date of Patent: June 4, 2013Assignee: Alliant Techsystems Inc.Inventors: Jack Erickson, Joel L. Sandstrom, Gene Johnston, Neal Norris, Patrick Braun, Reed Blau, Lisa Spendlove Liu
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Patent number: 8425703Abstract: Embodiments of the invention provide munitions that are optimized for both performance and safety. According to various embodiments of the invention, primers are provided having reduced sensitivity by using less sensitive ingredients. The primer formulations according to embodiments of the invention provide primers that are insensitive to stimulants that tend to cause inappropriate ignition of main propelling charges.Type: GrantFiled: March 24, 2010Date of Patent: April 23, 2013Assignee: The United States of Amierica as Represented by the Secretary of the NavyInventors: Christine Marie Michienzi, Christine Dianne Knott
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Publication number: 20120227874Abstract: A percussion primer composition including at least one explosive, at least fuel particle having a particle size of about 1500 nm or less, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same.Type: ApplicationFiled: April 26, 2012Publication date: September 13, 2012Inventors: Jack Erickson, Joel Lee Sandstrom, Gene Johnston, Neal Norris, Patrick Braun, Reed Blau, Lisa Spendlove Liu, Rachel Hendrika Newell
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Patent number: 8206522Abstract: A non-toxic, non-hydroscopic percussion primer composition and methods of preparing the same, including at least one explosive component that has been traditionally considered a moderately insensitive explosive or secondary explosive, and at least fuel particle component having a particle size of about 1.5 microns to about 12 microns, which allows the use of moderately active metal oxidizers. The sensitivity of the primer composition is created by the interaction between the moderately insensitive explosive and the fuel agent such that traditional primary explosives such as lead styphnate or DDNP are not needed. The primer composition also eliminates the risks and dangers associated with traditional nano-sized fuel particles.Type: GrantFiled: March 31, 2010Date of Patent: June 26, 2012Assignee: Alliant Techsystems Inc.Inventors: Joel Sandstrom, Aaron A Quinn, Jack Erickson
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Patent number: 8186995Abstract: A fire-starter device for survival or emergency use has a handle portion and case portion that twist together, to sheath a mischmetal flint rod inside the case, and a seal ring protects the flint rod from environmental moisture. The case has a steel strike plate and a guide channel. The mischmetal flint rod favorably has a composition of cerium—50%, lanthanum—26%, magnesium—10%, praseodymium—3%, neodymium—1%, and iron—10%.Type: GrantFiled: February 25, 2009Date of Patent: May 29, 2012Inventor: Andrew C. Putrello, Jr.
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Patent number: 8052813Abstract: An ignition composition and its applications, the ignition composition including at least (a) an explosive fraction that includes at least one primary explosive, (b) an oxidation-reduction system and (c) an agglomerate. In the ignition composition the explosive fraction represents 9 to 35% by weight of the composition, the primary explosive at least is tetrazene, and tetrazene represents at least 95% by weight of said explosive fraction.Type: GrantFiled: February 23, 2007Date of Patent: November 8, 2011Assignee: Cheddite FranceInventor: Alain Bass
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Publication number: 20110240186Abstract: A lead-free electric primer composition including a mixture of at least one metal having nanometer-sized particles with at least one oxidizer having nanometer-sized particles producing a metal(s)-oxidizer(s) nanocomposite, wherein the oxidizer(s) is present in an effective amount to substantially oxidize the metal(s), at least one gas generating material mixed with the metal(s)-oxidizer(s) nanocomposite producing a metal(s)-oxidizer(s)-gas generator(s) composition, at least one binder, the metal(s)-oxidizer(s)-gas generating composition is coated with the binder, and at least one conductive material.Type: ApplicationFiled: March 31, 2008Publication date: October 6, 2011Inventors: Kelvin T. Higa, Steve Son, Tom Doris, Stephen Fallis
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Publication number: 20110240185Abstract: A lead-free electric primer composition including a mixture of at least one metal having nanometer-sized particles with at least one oxidizer having nanometer-sized particles producing a metal(s)-oxidizer(s) nanocomposite, wherein the oxidizer(s) is present in an effective amount to substantially oxidize the metal(s), at least one gas generating material mixed with the metal(s)-oxidizer(s) nanocomposite producing a metal(s)-oxidizer(s)-gas generator(s) composition, at least one binder, the metal(s)-oxidizer(s)-gas generating composition is coated with the binder, and at least one conductive material.Type: ApplicationFiled: May 19, 2008Publication date: October 6, 2011Inventors: Kelvin T. Higa, Steve Son, Tom Doris, Stephen Fallis
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Publication number: 20110168047Abstract: A missile includes a pyrotechnic charge. The missile is constructed in such a way that the pyrotechnic charge is made to burn deflagratively when the missile is used correctly. The pyrotechnic charge includes a mixture containing at least one metal or a metal alloy as a fuel and at least one metal oxide as an oxidizing agent. The fuel and the oxidizing agent are selected in such a manner that they can react with one another by burning. The mixture is compressed to a density of at least 85% of a theoretical density of the mixture, and the fuel, the oxidizing agent and a quantitative ratio between the fuel and the oxidizing agent are selected in such a manner that a density of the mixture is at least 6 g/cm3.Type: ApplicationFiled: September 10, 2010Publication date: July 14, 2011Applicant: DIEHL BGT DEFENCE GMBH & CO. KGInventor: ARNO HAHMA
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Patent number: 7784403Abstract: The invention relates to an energetic igniter charge consisting of a mixture of at least one secondary explosive and an optical doping material in powder form. In accordance with the invention, the optical doping material is a metal. The energetic igniter charge can be used in a detonator as well as in an igniter.Type: GrantFiled: July 5, 2006Date of Patent: August 31, 2010Assignee: Deutsch-Franzosisches ForschungsinstitutInventors: Henry Moulard, Auguste Ritter, Jean-Marie Brodbeck
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Patent number: 7754036Abstract: A pressable explosive composition is provided. The composition includes at least 40 weight percent of substantially uncoated fuel particles, a nitramine mechanically blended with the substantially uncoated fuel particles, and a binder coating the nitramine. The binder constitutes about 1 to about 6 weight percent of the pressable explosive composition. Also provided are a pressed thermobaric explosive, weapons containing the pressed thermobaric explosive, and methods for making the composition and thermobaric explosive.Type: GrantFiled: December 3, 2003Date of Patent: July 13, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Kirk E. Newman, Virgil Riffe, Steven L. Jones, Mark D. Lowell
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Patent number: 7727347Abstract: A pressable explosive composition is provided. The composition includes at least 40 weight percent of substantially uncoated fuel particles, a nitramine mechanically blended with the substantially uncoated fuel particles, and a binder coating the nitramine. The binder constitutes about 1 to about 6 weight percent of the pressable explosive composition. Also provided are a pressed thermobaric explosive, weapons containing the pressed thermobaric explosive, and methods for making the composition and thermobaric explosive.Type: GrantFiled: January 18, 2006Date of Patent: June 1, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Kirk E. Newman, Virgil Riffe, Steven L. Jones, Mark D. Lowell
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Publication number: 20080229963Abstract: A reactive material that includes at least one of a fuel, an oxidizer, and a class 1.1 explosive and is formulated for use in a reactive material projectile. The reactive material is formulated to provide at least one of an overpressure of greater than approximately 9 pounds per square inch at a radial measurement of 12 inches from a point of impact on a target, a hole greater than approximately 2 square inches at an optimum penetration level in a target, and pressure, damage, and a flame when the reactive material bullet impacts a target. The fuel may be a metal, a fusible metal alloy, an organic fuel, or mixtures thereof. The oxidizer may be an inorganic oxidizer, sulfur, a fluoropolymer, or mixtures thereof. A reactive material projectile having the reactive material disposed therein is also disclosed.Type: ApplicationFiled: May 27, 2008Publication date: September 25, 2008Applicant: ALLIANT TECHSYSTEMS INC.Inventors: Daniel B. Nielson, Benjamin N. Ashcroft, Daniel W. Doll
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Patent number: 7393423Abstract: A chemical reaction between molten aluminum and an oxygen carrier such as water to do useful work is disclosed, and in particular two chemical methods to obtain aluminum in its molten state. One is to detonate a HE/Al mixture with surplus Al in stoichiometry, and the other is to use an oxidizer/Al mixture with surplus Al in stoichiometry. Additionally, there is a physical method of shocking and heating Al using high temperature reaction products. The produced Al in its liquid form is forced to react with an oxygen carrying liquid (e.g. water), giving off heat and releasing hydrogen gas or other gaseous material. A water solution of some oxygen-rich chemicals (e.g. ammonium nitrate) can be advantageously used in place of water. A shaped charge is also disclosed having a liner that contains aluminum, propelled by a high explosive such as RDX or its mixture with aluminum powder.Type: GrantFiled: August 8, 2001Date of Patent: July 1, 2008Assignee: Geodynamics, Inc.Inventor: Liqing Liu
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Patent number: 6997998Abstract: The subject of the present invention is lead- and barium-free propellant charges with primary explosives mixed with oxygen-supplying substances, characterized in that the primary explosives are selected from alkali metal and/or alkaline earth metal salts of dinitrobenzofuroxanes and the oxygen-supplying substances are chosen from metal peroxides, nitrates of ammonium, guanidine, aminoguanidine, triaminoguanidine, dicyanodiamidine, and the elements sodium, potassium, magnesium, calcium, cerium, and/or multivalent metal oxides. The propellant charges according to the invention exhibit increased stability with respect to known propellant charges that are free of harmful substances.Type: GrantFiled: January 8, 2004Date of Patent: February 14, 2006Assignee: Dynamit Nobel GmbH Explosivstoff-und SystemtechnikInventors: Rainer Hagel, Klaus Redecker
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Patent number: 6786986Abstract: This disclosure considers the use of specifically-sized Nitrocellulose particles of 75 ml fineness, free of other chemicals, as a flame enhancer in a Diazodinitrophenol primer mixture that is free of heavy metal constituents.Type: GrantFiled: April 14, 2003Date of Patent: September 7, 2004Assignee: Companhia Brasileira de CartuchosInventor: Laudemiro Martini Filho
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Patent number: 6749702Abstract: The present invention relates to a low temperature autoignition composition for safely initiating combustion of a main pyrotechnic charge in a gas generator or pyrotechnic device exposed to flame or a high temperature environment.Type: GrantFiled: January 22, 1998Date of Patent: June 15, 2004Assignee: Talley Defense Systems, Inc.Inventors: Gregory D. Knowlton, Christopher P. Ludwig
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Publication number: 20040025991Abstract: Gas generants in an inflator have nitroguanidine as a fuel and mica as a slagging agent. A gas generant with nitroguanidine has many desirable properties such as little hygroscopicity, a high conversion efficiency, and a suitable burn rate.Type: ApplicationFiled: August 7, 2002Publication date: February 12, 2004Inventors: JB Canterberry, Edward O. Hosey
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Publication number: 20040000362Abstract: The present invention provides a gas generant composition comprising a nitrogen-containing organic compound, an oxidizing agent and an additive, wherein a calorific value per mol of gas generated by the combustion of the gas generant is not more than 125KJ. Also, the present invention provides a gas generator using the said gas generant composition of the present invention.Type: ApplicationFiled: April 9, 2003Publication date: January 1, 2004Inventors: Eishi Sato, Dairi Kubo, Kenjiro Ikeda
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Patent number: 6599379Abstract: A low-smoke pyrotechnic composition comprising nitrocellulose; nitroguanidine; an oxidizing agent; and, at least one of a flame coloring agent and metal powder, and a method of processing the same is disclosed.Type: GrantFiled: April 12, 2001Date of Patent: July 29, 2003Assignee: DMD Systems, LLCInventors: Michael A. Hiskey, Darren L. Naud
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Patent number: 6599380Abstract: The invention relates to an igniter composition for use in a gas generator for a safety means in vehicles. The igniter composition consists of a gas-generating composition in an amount of 15 to 70 wt-% and of a thermite composition in an amount of 30 to 85 wt-%. The gas-generating composition consists essentially of a guanidine compound as fuel and an inorganic oxidizer. The thermite composition consisting essentially of a metal and a metal oxide. The igniter composition or the gas-generating composition and the thermite composition, each for itself, have an oxygen balance of between 0 and −20%.Type: GrantFiled: June 6, 2001Date of Patent: July 29, 2003Assignee: TRW Airbag Systems GmbH & Co. KGInventors: Siegfried Zeuner, Achim Hofmann, Roland Schropp, Karl-Heinz Rödig
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Patent number: 6592778Abstract: The invention relates to a method for producing propellant compacts for use in gas generators for safety devices in motor vehicles by extrusion, comprising the following steps: mixing the constituents of the propellant and stirring the mixture into a paste with a solvent so as to form a plasticizable mass, extruding the plasticizable mass in order to form propellant compacts, and drying the propellant compacts in order to remove the solvent, a thickening agent which increases the viscosity being added to the solvent prior to pasting in a proportion of from 0.1 to 10% by weight, relative to the solvent, and the dried propellant compacts having a density of at least 70% of the theoretical density. The invention further relates to propellant compacts obtainable in accordance with this method.Type: GrantFiled: March 2, 2001Date of Patent: July 15, 2003Assignee: TRW Airbag Systems GmbH & Co. KGInventors: Siegfried Zeuner, Achim Hofmann, Roland Schropp, Karl-Heinz Rödig
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Patent number: 6562160Abstract: The present invention is a propellant used to inflate an airbag in vehicle safety systems comprising from about 70 weight percent to about 82 weight percent Cyclotrimethylenetrinitramine (RDX), from about 10 weight percent to about 15 weight percent of a polymer binder, from about 6 weight percent to about 9 weight percent of an inert plasticizer, from about 2 weight percent to about 4 weight percent of Hydroxypropyl Cellulose, from about 0.5 weight percent to about 1 weight percent of a polymeric processing aid; and, from about 0.3 weight percent to about 0.5 weight percent of a material that acts as a stabilizer and anti-oxidant. The present invention is designed to have a long shelf life, high resistance to performance degradation after thermal aging testing and excellent physical properties such as excellent strength, insensitivity, and safety.Type: GrantFiled: April 10, 2001Date of Patent: May 13, 2003Assignee: The United States of America as represented by the Secretary of the NavyInventor: Christine M. Walsh
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Patent number: 6544363Abstract: A non-toxic heavy-metal-free priming mix and a method of forming same, designed especially for industrial shotshells and other shotshells having abnormally heavy charges of propellant in an effort to qualify for heavy duty assignments such as the need to break up cement which has set up within a cement kiln and impedes the operation of the kiln. The mix is characterized by the inclusion of a secondary highly shock-sensitive explosive, PETN, in unusually large amounts such as 13-17% by weight of the mix as well as equally large amounts of powdered aluminum, as a fuel. This combination, supported by potassium nitrate and ferric oxide as primary and secondary oxidizers, respectively, proves to be highly effective. Each of the components, namely DDNP, PETN, tetracene, glass, powdered aluminum, potassium nitrate, ferric oxide, and gum tragacanth is non-toxic and heavy-metal-free.Type: GrantFiled: October 30, 2000Date of Patent: April 8, 2003Assignee: Federal Cartridge CompanyInventor: Jack A. Erickson
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Patent number: 6478903Abstract: A non-toxic primer mix including both bismuth sulfide and potassium nitrate as the pyrotechnic portion of the primer is disclosed. In a further embodiment, a non-toxic primer mix comprising zinc sulfide and aluminum nitrate as the pyrotechnic portion of the primer mix is disposed. Bismuth and zinc sulfide act as fuels for the oxidizers of potassium and aluminum nitrate in providing an ignition flame for the primer. The non-toxic primer mix further contains a lead-free explosive material, and additionally can include added fuels, sensitizers, explosives and binders.Type: GrantFiled: October 6, 2000Date of Patent: November 12, 2002Assignee: RA Brands, LLCInventors: Henry J. John, Jr., Carolyn Yeager, Don Pile, Tim Webb
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Publication number: 20020148542Abstract: Gas generant compositions and methods of gas generation are provided whereby desired gas generation can be realized without requiring the presence and use a charge or coating of an associated igniter composition.Type: ApplicationFiled: April 7, 2000Publication date: October 17, 2002Inventors: Robert D. Taylor, Ivan V. Mendenhall, David W. Parkinson
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Patent number: 6453816Abstract: A temperature fuse for gas-generating mixtures consists of substances or mixtures of substances that have lower detonation points or decomposition points than the gas-generating mixture. In particular, the temperature fuse contains substances or mixtures of substances that thermally decompose exothermically in a narrowly restricted temperature range. The evolution of heat that results ignites the gas-generating mixture.Type: GrantFiled: April 17, 2001Date of Patent: September 24, 2002Assignee: Dynamit Nobel GmbH Explosivstoff-und SystemtechnikInventors: Klaus Redecker, Waldemar Weuter, Ulrich Bley, Dagmar Schmittner
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Patent number: 6302979Abstract: A gas generant is provided which decreases toxic components, in particular carbon monoxide and nitrogen oxides, in generated gas to a concentration practical as an air bag system for automobile. A nitrogen-containing organic compound such as a compound containing amino group or amido group or a tetrazole derivative and a oxygen-containing inorganic oxidizer such as KNO3, Sr(NO3)2 or KClO4 are essential components. Therewith one or more metal oxides are contained in the mixed catalyst of the gas generant composition. The oxide is selected from manganese dioxide having a specific surface area not less than 50 m2/g; copper oxide having a specific surface area not less than 1 m2/g; molybdenum oxides such as molybdenum dioxide, molybdenum trioxide, molybdic acid and ammonium molybdate: and copper oxides, cobalt oxides, iron oxides and silver oxides.Type: GrantFiled: November 23, 1999Date of Patent: October 16, 2001Assignee: Daicel Chemical Industries, Ltd.Inventors: Kazuyuki Matsuoka, Shogo Tomiyama
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Patent number: 6221187Abstract: The present invention relates to a low temperature autoignition composition for safely initiating combustion of a main pyrotechnic charge in a gas generator or pyrotechnic device exposed to flame or a high temperature environment.Type: GrantFiled: January 21, 1999Date of Patent: April 24, 2001Assignee: Talley Defense Systems, Inc.Inventors: Gregory D. Knowlton, Christopher P. Ludwig
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Patent number: 6136224Abstract: A gas generant for an air, which is improved in the defects of gas generants using sodium azide in a practical use and has stable combustion capability. And a molecular compound comprising (a) a gas generant component, (b) an oxidant component and (c) a reaction accelerator component, preferably represented by the composition formula (I).M.mX.nY (I)[wherein, M is Al Mg, Ca, Cr, Cu, Zn, Mn, Fe, Co, Sr, Ni and another metal components; X is a nitrogen-containing compound having 0 or 1 carbon atom; Y is an anion such as NO.sub.3 and ClO; m is a number of 1 to 3; and n is a number 2 to 3].Type: GrantFiled: August 28, 1996Date of Patent: October 24, 2000Assignee: Daicel Chemical Industries, Ltd.Inventors: Jianzhou Wu, Norimasa Hirata, Takushi Yokoyama
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Patent number: 6132480Abstract: An igniter composition for a gas generant and related methods of gas generation are provided in which, in addition to a boron fuel component and an oxidizer component, the igniter composition additionally includes a gas-producing fuel component.Type: GrantFiled: April 22, 1999Date of Patent: October 17, 2000Assignee: Autoliv ASP, Inc.Inventors: Michael W. Barnes, Kristy Woodward Swanson, Christopher Hock
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Patent number: 6103029Abstract: Polyethers containing pendant azide groups are cured without a catalyst by yclo-addition with diacetylenes to form triazole cross-linked, energetic binders having improved mechanical properties and stability. The polyethers typically have three hydroxy-terminated chains each of about 5000 to about 50,000 daltons. Ideally, only one azide group per chain reacts by cyclo-addition since the diacetylene is added in a proportion of about one molecule to each two polyether chains. Repeating units of glycidal azide, azidomethylmethyloxetane, bis-azidomethyloxetane/nitratomethylmethyloxetane, and bis-azidomethyloxetane/azidomethylmethyloxetane are believed effective as polyethers when used with the diethynlbenzenes 1,4-bis(ethynl)benzene, 1,4-bis(ethynlcarbonyl)benzene, and 1,3-bis(cyanoethynl)benzene. The polyethers may be further cross-liked at the hydroxyl terminations by urethane bonds.Type: GrantFiled: June 23, 1997Date of Patent: August 15, 2000Assignee: The United States of America as represented by the Secretary of the NavyInventor: Russell Reed, Jr.
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Patent number: 6073962Abstract: The present invention is directed to an airbag system that includes a gas generant, which is improved in the defects of gas generants using sodium azide in a practical use and has stable combustion capability. A molecular compound comprising (a) a gas generant component, (b) an oxidant component and (c) a reaction accelerator component, preferably represented by the composition formula (I).M.mX.Type: GrantFiled: October 20, 1997Date of Patent: June 13, 2000Assignee: Daicel Chemical Industries, Ltd.Inventors: Jianzhou Wu, Norimasa Hirata, Takushi Yokoyama
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Patent number: 5962808Abstract: Nonazide gas generant compositions, useful for inflating passenger restraint gas inflator bags, comprise a multimetallic coordination complex oxidizer selected from coordination complexes comprised of anionic nitro and nitrito ligands coordinated with a transitional metal template, and a cationic component comprised of two or more different metals. The gas generant compositions generate relatively more gas and are significantly less toxic than known azide gas generant compositions, and furthermore, generate solids that are readily filterable.Type: GrantFiled: March 5, 1997Date of Patent: October 5, 1999Assignee: Automotive Systems Laboratory, Inc.Inventor: Norman H. Lundstrom
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Patent number: 5959242Abstract: The present invention relates to an autoignition composition for safely initiating combustion of a main pyrotechnic charge in a gas generator or pyrotechnic device exposed to flame or a high temperature environment. The autoignition compositions of the invention include a mixture of an oxidizer composition and a powdered metal, wherein the oxidizer composition includes at least one of an alkali metal or an alkaline earth metal nitrate, a complex salt nitrate, such as Ce(NH.sub.4).sub.2 (NO.sub.3).sub.6 or ZrO(NO.sub.3).sub.2, a dried, hydrated nitrate, such as Ca(NO.sub.3).sub.2.4H.sub.2 O or Cu(NO.sub.3).sub.2.2.5 H.sub.2 O, silver nitrate, an alkali or alkaline earth chlorate, an alkali or alkaline earth metal perchlorate, ammonium perchlorate, a nitrite of sodium, potassium, or silver, or a solid organic nitrate, nitrite, or amine, such as guanidine nitrate, nitroguanidine and 5-aminotetrazole, respectively.Type: GrantFiled: May 14, 1996Date of Patent: September 28, 1999Assignee: Talley Defense Systems, Inc.Inventors: Gregory D. Knowlton, Christopher P. Ludwig
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Patent number: 5684268Abstract: A lead-free primer mix based on diazodinitrophenol, tetrazene, nitrocellulose, barium nitrate and at least one of PETN, aluminum and antimony sulfide exhibits performance characteristics comparable to lead styphnate compositions.Type: GrantFiled: September 29, 1995Date of Patent: November 4, 1997Assignee: Remington Arms Company, Inc.Inventor: Frances G. Lopata
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Patent number: 5677510Abstract: A gas generating mixture comprises a high nitrogen and low carbon fuel from he group nitroguanidine (NIGU), tiraminoguanidine nitrate (TAGN), diguanidinium-5,5'-azotetrazolate (GZT) or 3-nitro-l,2,3-triazol-5-one (NTO), as well as copper diammine dinitrate Cu(NH.sub.3).sub.2 (NO.sub.3).sub.2 as the oxidizer and a pyrophoric metal or such a metal alloy on a carrier catalyst.Type: GrantFiled: November 24, 1995Date of Patent: October 14, 1997Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.v.Inventors: Klaus Martin Bucerius, Norbert Eisenreich, Helmut Schmid, Walter Engel
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Patent number: 5675119Abstract: A granular explosive is obtained by mixing porous prill ammonium nitrate having an average particle size of 0.5 to 3.0 mm with a liquid aromatic dinitro compound and optionally a metal powder. Explosives having high sensitivity and power can be obtained by a simple and easy process.Type: GrantFiled: August 1, 1995Date of Patent: October 7, 1997Assignees: Mitsubishi Chemical Corporation, Nippon Kayaku Kabushiki KaishaInventors: Koichi Otani, Seiichi Yoshida, Yoshiyuki Ikeda, Hiroyuki Taniguchi
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Patent number: 5652408Abstract: An explosive projectile has a splinter-generating body inside which is placed an explosive and/or incendiary load ignited by a primer. The projectile also contains an intermediate charge placed between the primer and the explosive load. The charge is composed of a mixture of an explosive and a first pyrotechnic composition including at least one oxidizing agent and at least one reducing agent. The explosive projectile may be utilized as a medium caliber projectile ignited upon impact by a pyrotechnic fuse.Type: GrantFiled: July 14, 1995Date of Patent: July 29, 1997Assignee: Manurhin DefenseInventor: Jacques Nicolas
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Patent number: 5587552Abstract: Infrared illuminant compositions are disclosed which produce significant quantities of infrared radiation when burned but which produce very little visible light. The infrared illuminant compositions provide specific illumination in the spectral range visible with night vision devices. The disclosed infrared illuminant compositions include ammonium nitrate as the main oxidizer, an infrared generator such as cesium nitrate, rubidium nitrate, or mixtures thereof, and a fuel. By eliminating potassium and its direct and indirect visible light contributions, from the illuminant compositions, improved concealment indexes are obtained. Other additives, including conventional binders and burn rate modifiers may be used as to tailor the performance and physical characteristics of the infrared illuminant composition.Type: GrantFiled: November 9, 1993Date of Patent: December 24, 1996Assignee: Thiokol CorporationInventors: David R. Dillehay, David W. Turner
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Patent number: 5565710Abstract: There is provided a process for manufacturing a granular igniter, which facilitates control of the igniter preparation, handling of the granule igniter and improvement in manufacturized yield. The present invention also provides a process for manufacturing a granular igniter which is free from toxic gas generation when burned and which has excellent fluidity. The present invention moreover reduces the number of manufacturing process facilitating the production process, and reducing production costs.An igniter containing boron and potassium nitrate are mixed together with water in a homogenizer to form a homogeneous slurry. The mixing ratio of the igniter to the water is set in the range of 1.0:0.6 to 1.0:1.6 in terms of weight ratio. The slurry is sprayed in a spray dryer where it is dried and granulated. Micropowder, which failed to be collected as the granule, is recovered through a cyclone, and recirculated as the raw material.Type: GrantFiled: January 23, 1995Date of Patent: October 15, 1996Assignee: NOF CorporationInventors: Koji Ochi, Nobukazu Asano, Yoshio Sawada
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Patent number: 5431756Abstract: The invention relates to melt cast explosives, propellants or pyrotechnics which contain a nitrated energetic material such as trinitrotoluene, a desensitizer such as wax or petroleum oil and an alkylated polyvinylpyrrolidone emulsifying agent.Type: GrantFiled: February 25, 1993Date of Patent: July 11, 1995Assignee: Mach I, Inc.Inventors: Bernard M. Kosowski, Robert C. Taylor
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Patent number: 5404813Abstract: The present invention relates to metal filaments for use as fuel additives for rocket propellants, explosives, and other pyrotechnic devices. Preferred filaments are those such as zirconium, niobium and titanium (and alloys thereof) which have very high heat of combustion.Type: GrantFiled: October 23, 1989Date of Patent: April 11, 1995Assignee: Composite Materials Technology, Inc.Inventor: James Wong