Spiral Type Patents (Class 102/284)
  • Patent number: 10093592
    Abstract: A combustible element includes regions of fuel material interspersed with regions of oxidizer material. The element may be made by additive manufacturing processes, such as three-dimensional printing, with the fuel material regions and the oxidizer material regions placed in appropriate locations in layer of the combustible element. For example, different extruders may be used to extrude and deposit portions of a fuel filament and an oxidizer filament at different locations in each layer of the combustible element. The combustible element may define a combustion chamber within the element, where combustion occurs when the combustible element is ignited. The fuel material and the oxidizer material may be selected, and their relative amounts may be controlled, such that desired relative amounts of fuel and oxidizer are present for combustion with desired characteristics, such as combustion rate.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: October 9, 2018
    Assignee: Raytheon Company
    Inventors: Jeremy C. Danforth, Mark T. Langhenry, Matt H. Summers, Teresa Perdue
  • Patent number: 6820558
    Abstract: A disk-shaped propellant module (6) for a propellant charge (2), which can be composed of several modules of this type. To ensure a uniform and symmetrical ignition of the propellant charge (2) for a cartridge with increased charge density (>1.2 g/cm3), the propellant module (6) is provided with at least three axially extending ignition channels (9), uniformly distributed over a partial circle, and at least three radial ignition channels (10) that extend from the inside or interior of the propellant module (6) to its outer edge surface (11). The center of the circle for the axial ignition channels (9) is positioned on the central axis (100) for the propellant module (6) and each of the radial ignition channels (10) intersects with at least one of the axial ignition channels (9).
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: November 23, 2004
    Assignee: Rheinmetall W & M GmbH
    Inventors: Hans-Karl Haak, Alexei Voronov
  • Patent number: 6431072
    Abstract: A propellant grain for a cylindrical casing has a cavity including an axially central opening with a combustion product exit port at one end. The grain bears a plurality of surfaces extending circumferentially about and disposed normally or helically to this opening so as to define, between these surfaces and axially of the casing, alternating sections of propellant and sections of a groove or grooves in the propellant. The groove sections extend radially from the opening to a distance selectable to provide the grain with a large initial surface area while providing a high propellant volume.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: August 13, 2002
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Harry L. Archer, Jr.
  • Patent number: 5872325
    Abstract: The invention is directed to an ammunition casing made of a composite fiber material, which comprises fiber material and a bonding agent, is at least partially flammable and has a high strength. The ammunition casing is particularly useful when surrounding a smoke screen unit, and the combustion reaction products of the composite fiber material form soot particles, preferably of hydrocarbon C.sub.X H.sub.Y, which will contribute to the smoke screen effect of the smoke screen unit during combustion.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: February 16, 1999
    Assignee: Buck Werke GmbH & Co.
    Inventors: Herwig Feldmeier, Klaus Hieke
  • Patent number: 5721392
    Abstract: The pyrotechnic ignition device of this invention comprises a hollow tubular coiled charge of pyrotechnic sheet material defining an ignition initiation position, the internal diameter of the charge decreasing and the wall thickness increasing over at least a portion of the charge extending from the initiation position in the direction of burning. This configuration enhances the reliability of ignition and the rate of flame development.Preferably the adjacent plies of the coiled charge are spaced apart. The preferred coiled charge also has a portion downstream from the initiation position in the direction of burning which decreases in external diameter and wall thickness in a direction extending away from the initiation position, the configuration of this portion being effective to enhance the speed and violence of burning of a main gas-generating propellant charge ignited by the coiled charge.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: February 24, 1998
    Assignees: Imperial Chemical Industries PLC, ICI Canada Inc.
    Inventors: Sek Kwan Chan, Steven John Graham, Graeme Allan Leiper, Moira Logan
  • Patent number: 5616884
    Abstract: A propellant system is disclosed which includes a propellant applied to at least one surface of a substrate which is in the form of a strip. The propellant strip is adhesively attached to itself in a configuration which conceals propellant within the configuration and which allows the attached strip to peel away from itself under applied forces thereby resulting in smooth and continuous exposure of propellant for burning. The system is directed to use with ejectable projectiles which are slidably disposed within a canister or casing. The propellant system is interconnected between the projectile and the cannister which houses the projectile. The propellant is urged to peel, and thus expose propellant for burning, as the projectile is ejected from the canister. Alternatively, the propellant is telescoped and covered with a sleeve which peels away as the projectile is ejected.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: April 1, 1997
    Assignee: Thiokol Corporation
    Inventors: Mark A. Solberg, James A. Hartwell
  • Patent number: 5596166
    Abstract: A penetrating vehicle having a rocket motor includes an elongated projectile body with a forward section for holding a payload and a rearward section for housing the rocket motor. The vehicle contains a fuse that ignites the propellent of the rocket motor during impact of the projectile body with a surface barrier. The propellent provides high thrust in a rapid burn time and thereby counteracts undesirable deceleration forces acting on the body during impact. The high thrust also promotes a maximum penetration of the projectile body within the surface barrier.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: January 21, 1997
    Assignee: Logicon RDA
    Inventor: Robert L. Gould
  • Patent number: 5467714
    Abstract: High reaction temperature explosive compositions which provide enhanced air blast and extended reaction times are disclosed. The explosive compositions include a separate acceptor phase and a separate explosive phase. The acceptor phase contains a halogenated polymer and a reactive metal which are capable of reacting at high temperature and pressure. The explosive phase includes a nonmetallized explosive. Suitable explosives produce a detonation pressure in excess of 200 kilobars at the Chapman-Jouget (C-J) condition.In the explosive compositions disclosed herein, at least a portion of the explosive phase surrounds the acceptor phase. In this configuration, detonation of the explosive phase exposes the acceptor phase to high temperatures and pressures which permit the metal and halogenated polymer to efficiently react and produce even greater temperatures and pressures.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: November 21, 1995
    Assignee: Thiokol Corporation
    Inventors: Gary K. Lund, Paul C. Braithwaite
  • Patent number: 5322018
    Abstract: An igniter (18) provides rapid longitudinal and radial propagation of the ignition reaction. The igniter may comprise a pyrotechnic material and an inorganic binder, such as silica, carried on a carrier web (10) which may be fiber-glass. One or more layers of coated web (10) are disposed to provide an igniter (18) of cylindrical configuration and having a hollow core. The coated layers are permeable to the ignition reaction to facilitate radial propagation of ignition. The hollow core and the continuous nature of the pyrotechnic layers promotes longitudinal propagation of ignition. The igniter may consist mostly or entirely of inorganic materials to reduce or eliminate the formation of carbon monoxide upon ignition, and may be contained within a radially perforated sheath (20) to form a radial ignition device (25).
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: June 21, 1994
    Assignee: The Ensign-Bickford Company
    Inventors: William C. Hadden, Kenneth C. Puls
  • Patent number: 5211224
    Abstract: An annular shaped gas generating power charge is shown of the type which can be used in a downhole tool in a well. The charge is provided in the form of a longitudinal strip of solid propellant having a length and a width, a leading end which defines a burn area, a trailing end and opposing side edges. The strip is helically wrapped in at least one spiral turn about a central axis so that the opposing edges of the strip abut one another to form an annular shape. The annular shape provides a controlled gas generation rate and can be installed in the setting chamber of a downhole tool to provide a controlled setting action of the elastomeric components of the downhole tool.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: May 18, 1993
    Assignee: Baker Hughes Incorporated
    Inventor: Brett W. Bouldin
  • Patent number: 4706567
    Abstract: The disclosure relates to a method for producing charges for explosive jointing of large-diameter pipes such as pipelines. According to the invention, such charges are formed in that a strip-shaped flat explosive is wound and joined together to form a circular ring of even thickness consisting of a plurality of closely abutting layers.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: November 17, 1987
    Assignee: Nobel Kemi AB
    Inventors: Hermann Schmid, Per Sjoberg, Leif Svensson
  • Patent number: 4660475
    Abstract: A propellant charge is manufactured by spooling a strand of propellant onto a form member. In accordance with one embodiment of the invention, the form member is a spool composed of propellant, and the spooled propellant, including the spool, is loaded into a charge housing.
    Type: Grant
    Filed: July 31, 1985
    Date of Patent: April 28, 1987
    Assignee: Morton Thiokol, Inc.
    Inventors: Gerald W. Rogowski, Frank H. Bell
  • Patent number: 4311005
    Abstract: An improved rocket motor using a solid propellant is shown to include a perforate shield disposed between a combustion chamber and a nozzle to prevent any portion of the solid propellant from entering the nozzle during operation.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: January 19, 1982
    Assignee: Raytheon Company
    Inventors: Wallace A. Hurd, Jr., Fred R. Youngren
  • Patent number: 4275657
    Abstract: A pyrotechnic charge for generating gases, for example for the propulsion of an engine, comprising elongate strands of propellant fixed, such as by adhesive or mechanical fastening devices, to at least one band of flexible material which is wound into a spiral having several turns so that each strand of propellant is positioned radially between adjacent turns of the band and lies in an axial plane. The flexible band has an inhibiting effect on the combustion characteristics of the strands of propellant.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: June 30, 1981
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventor: Francis A. Dallet