Filaments Or Fibers Patents (Class 419/24)
  • Patent number: 9788951
    Abstract: Shapeable porous metal implants and methods for use in various procedures are disclosed. The implants can comprise a shell according to some examples. According to one example, the method can include providing a sheet of highly porous metal material having a porosity of between 55% and 90%, and wrapping the sheet of highly porous metal material around at least a first bone of the patient. Further examples can form the sheet intra-operatively to a desired shape. In an example, the porous metal sheet can be formed of tantalum or tantalum alloys.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: October 17, 2017
    Assignee: Zimmer, Inc.
    Inventors: Bradford J. Coale, Steven Seelman
  • Patent number: 9724198
    Abstract: Embodiments of the invention described herein thus provide systems and methods for providing improved surgical implants. Embodiments of the implants may include a thin porous sheet formed on a mandrel. The porous sheet that is formed has an interconnected pore structure that may be compressed by a heat compression mold without losing porosity. Additional membrane materials or other layer materials may be applied to one of the face surfaces of the porous sheet or to one of the edges of the porous sheet. For example, a solid membrane surface may be compressed, bonded, welded, or secured a surface face or an edge of the porous sheet. The solid membrane may be compressed or laminated to the upper surface, lower surface, or both. The solid membrane may be welded to at least one edge of the porous sheet (by, for example, being butt welded, thermally bonded, or heat compressed to the at least one edge).
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: August 8, 2017
    Assignee: Poriferous, LLC
    Inventor: Aaron Noble
  • Patent number: 9572668
    Abstract: The invention relates to an implant and a set for producing an implant and their uses. Furthermore, the invention describes a method of making an implant as per the invention. An implant for producing bone implants with improved mechanical characteristics, especially with adjustable mechanical characteristics, is provided via the invention. The implant as per the invention made up of a fiber composite material contains resorbable mineral bone cement as the matrix material, to which reinforcing, long metal fibers and/or endless metallic fibers with an aspect ratio of at least 100:1 are added in the form of at least one fiber structure that provides a framework and that preforms the contour of the implant.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: February 21, 2017
    Assignee: Innotere GmbH
    Inventors: Berthold Nies, Sophie Rössler, Sandra Storch, Chokri Cherif, Ezzeddine Laourine
  • Patent number: 8834597
    Abstract: A method of fabricating metallic Cu nanowires with lengths up to about 25 ?m and diameters in a range 20-100 nm, or greater if desired. Vertically oriented or laterally oriented copper oxide structures (CuO and/or Cu2O) are grown on a Cu substrate. The copper oxide structures are reduced with 99+ percent H or H2, and in this reduction process the lengths decrease (to no more than about 25 ?m), the density of surviving nanostructures on a substrate decreases, and the diameters of the surviving nanostructures have a range, of about 20-100 nm. The resulting nanowires are substantially pure Cu and can be oriented laterally (for local or global interconnects) or can be oriented vertically (for standard vertical interconnects).
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: September 16, 2014
    Assignee: The United Stated of America as Represented by the Administrator of the National Aeronautics & Space Administration (NASA)
    Inventors: Jin-Woo Han, Meyya Meyyappan
  • Patent number: 8709125
    Abstract: A method of forming monodispersed metal nanowires comprising: forming a reaction mixture including a metal salt, a capping agent and a quaternary ammonium chloride in a reducing solvent at a first temperature; and forming metal nanowires by reducing the metal salt in the reaction mixture.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: April 29, 2014
    Assignee: Cambrios Technologies Corporation
    Inventor: Pierre-Marc Allemand
  • Patent number: 8557175
    Abstract: The invention relates to a method for making a metal part that comprises a reinforcement (15) made of ceramic fibers. The method comprises the following steps: forming at least one annular-shaped insert (15) by assembling a bundle of metal-coated fibers; placing the insert into a hollow metal mold (10) such that the insert is spaced between the walls (10a, 10b) of the mold; filling the mold with a metal powder; generating vacuum in the mold and closing the same; hot isostatic compressing the assembly at a temperature and under a pressure sufficient for binding the powder particles between them and for binding the insert fibers between them; removing the mold and optionally machining to the desired shape.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: October 15, 2013
    Assignee: Messier-Bugatti-Dowty
    Inventor: Richard Masson
  • Patent number: 8454721
    Abstract: A method of forming monodispersed metal nanowires comprising: forming a reaction mixture including a metal salt, a capping agent and a quaternary ammonium chloride in a reducing solvent at a first temperature; and forming metal nanowires by reducing the metal salt in the reaction mixture.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: June 4, 2013
    Assignee: Cambrios Technologies Corporation
    Inventor: Pierre-Marc Allemand
  • Publication number: 20070271784
    Abstract: Fabricating an IBR, in particular a two-part IBR. A metal container is defined, made up of a plurality of parts that define between them at least one annular cavity, an insert made of composite material is positioned in the or each cavity, the assembly is subjected to hot isostatic compacting, and a rotor disk is machined.
    Type: Application
    Filed: May 18, 2007
    Publication date: November 29, 2007
    Applicant: SNECMA
    Inventor: Adrien Fabre
  • Patent number: 6899160
    Abstract: The present invention discloses a conductive injection molding composition. The thermally conductive composition includes a metallic base matrix of, by volume, between 30 and 60 percent. A first thermally conductive filler, by volume, between 25 and 60 percent is provided in the composition that has a relatively high aspect ratio of at least 10:1. In addition, an alternative embodiment of the composition mixture includes a second thermally conductive filler, by volume, between 10 and 25 percent that has a relatively low aspect ratio of 5:1 or less.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: May 31, 2005
    Assignee: Cool Options, Inc.
    Inventor: Kevin A. McCullough
  • Patent number: 6899777
    Abstract: A process for continuous composite coextrusion comprising: (a) forming first a material-laden composition comprising a thermoplastic polymer and at least about 40 volume % of a ceramic or metallic particulate in a manner such that the composition has a substantially cylindrical geometry and thus can be used as a substantially cylindrical feed rod; (b) forming a hole down the symmetrical axis of the feed rod; (c) inserting the start of a continuous spool of ceramic fiber, metal fiber or carbon fiber through the hole in the feed rod; (d) extruding the feed rod and spool simultaneously to form a continuous filament consisting of a green matrix material completely surrounding a dense fiber reinforcement and said filament having an average diameter that is less than the average diameter of the feed rod; and (e) depositing the continuous filament into a desired architecture which preferably is determined from specific loading conditions of the desired object and CAD design of the object to provide a green fiber rei
    Type: Grant
    Filed: January 2, 2002
    Date of Patent: May 31, 2005
    Assignee: Advanced Ceramics Research, Inc.
    Inventors: K. Ranji Vaidyanathan, Joseph Walish, Mark Fox, John W. Gillespie, Jr., Shridhar Yarlagadda, Michael R. Effinger, Anthony C. Mulligan, Mark J. Rigali
  • Patent number: 6843821
    Abstract: The aim of the invention is to provide filtering candles (1) comprising a sintered filtering tube (2) and a collar (3) which is connected thereto, and having an increased shelf life and improved resistance values. To this end, the collar (3) comprises an annular collar wall (4) which oriented towards the filtering tube (2) from the neck. Said wall comprises at least one recess (8) which is arranged in a perpendicular manner and at an angle in relation to a plane which is perpendicular to the axis of the filtering tube.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: January 18, 2005
    Assignee: GKN Sinter Metals GmbH
    Inventor: Simon Steigert
  • Publication number: 20020096428
    Abstract: The invention includes the use of a high-modulus fiber metal matrix composite material as a backing plate for physical vapor deposition targets, as a lid for microelectronics packages, as a heat spreader, and as a heat sink. In one implementation, copper-coated carbon fibers are mixed with copper powder. In another implementation, the mixture is consolidated to a carbon fiber metal matrix composite by using a vacuum hot press. The resultant backing plate has a coefficient of thermal expansion of 4.9×10−6/C, thermal conductivity of at least 300 W/mK, density of greater than 99% of theoretical, and the composite material of the backing plate is 30% lighter than Cu while also having higher stiffness than Cu. The high-modulus fiber metal matrix composite backing plate can be used for high power W, Ta, and ceramic PVD targets.
    Type: Application
    Filed: January 19, 2001
    Publication date: July 25, 2002
    Inventors: Tim Scott, Tamara White, Jianxing Li
  • Patent number: 6402804
    Abstract: Disclosed is a process for preparing metallic fibers. It comprises pre-treating metal powder of a predetermined size such that finally obtained metallic fibers can be separated with ease; elongating the pre-treated metal powder at a predetermined draw ratio by use of compression molding; and separating metallic fibers from the drawn metallic material. The metallic fibers can find various applications in the electrically conducing material industries, including fillers for conducting paints, pastes and plastics, metal catalysts, electrode materials, sound-absorbing plates, and filters.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: June 11, 2002
    Assignee: Future Metal Co., Ltd.
    Inventors: Dong Yik Kim, Sung Kyun Kim
  • Publication number: 20020039663
    Abstract: Provided by the present invention is a process for making a wet-layed metal fiber nonwoven sheet. The process comprises first dispersing metal fibers into an aqueous dispensing fluid which contains a non-carboxy containing water soluble polymer in an amount such that the viscosity of the dispensing fluid with dispersed metal fibers is suitable for wet-laying techniques. Generally, the amount of the water soluble polymer comprises from about 1 to about 5 weight percent of the aqueous dispensing fluid. In a preferred embodiment, starch is used as the water soluble polymer.
    Type: Application
    Filed: September 13, 2001
    Publication date: April 4, 2002
    Inventor: Homan B. Kinsley
  • Patent number: 6197251
    Abstract: A porous metal material (22) is manufactured by a method comprising a step of utilizing a magnetic field to orient numerous metal staple fibers (3), and holding these metal staple fibers (3) on the metal substrate sheet (9) in a state of being more or less perpendicular thereto by means of an adhesive (19) supplied to the metal substrate sheet (9), and a step of removing the adhesive (19) by pyrolysis, and integrally joining the metal staple fibers (3) and metal substrate sheet (9) by sintering.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: March 6, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akira Hashimoto, Junjirou Awano, Katsuhiro Okamoto, Tsumoru Ohata, Yoriko Takai, Masaki Hirokoh
  • Patent number: 6143051
    Abstract: A friction material comprising a sintered mass of iron in which graphite particles are dispersed, which sintered mass is formed from between 13 and 22 vol. % of iron fibers, between 13 and 22 vol. % of iron particles having a particle size of 10-400 .mu.m, between 40 and 70 vol. % of graphite particles having a particle size of 25-3000 .mu.m, and between 10 and 15 vol. % of a metallic binder having a melting point of 800-1140.degree. C., and a method of preparing such a friction material, wherein a mixture of these components is compressed at a pressure of at least 100 MPa so as to form a compact having a desired form and size, and where the compact thus formed is sintered at a temperature between 800 and 1140.degree. C. for a period of time which is sufficiently long for achieving concretion of iron fibers, iron particles and metallic binder.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: November 7, 2000
    Assignees: A/S Roulunds Fabriker, Volvo Truck Corporation
    Inventors: Ole Kr.ae butted.mer, Niels Brams.o slashed., Erik Simonsen, Noel De Leon, Knud Strande, Rolf Tornberg, Claes Kuylenstierna
  • Patent number: 6110417
    Abstract: Metallic powders are extruded from a spinning nozzle to form metallic fibers each having a diameter of 1.0 .mu.m-100 .mu.m. Then, the resultant metallic fibers are formed into a sheet having a porous structure such as a nonwoven sheet, or the like. Thereafter, the sheet is sintered. An active substance is applied to pores of a resultant porous metallic sheet to be used as an electrode substrate of a battery. The metallic fibers are three-dimensionally intertwined with each other by using fluid at a high pressure and a high speed and then, surfaces of the metallic fibers intertwined with each other is fused under pressure at a temperature lower than the melting point of the metal to directly connect intersections of the intertwined metallic fibers so as to form a porous metallic sheet.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: August 29, 2000
    Assignee: Katayama Special Industries Ltd.
    Inventor: Hirofumi Sugikawa
  • Patent number: 5841041
    Abstract: A porous mold material is provided that contains pores for ventilation in a metal casting, which pores range from 20 to 50 microns, and wherein the porosity value of the porous mold material ranges from 25 to 35% by volume. A method is further provided of producing a porous mold material that contains pores ranging from 20 to 50 microns for ventilation in casting, which method is characterized in that the mixing ratio of stainless steel particles to stainless steel short fibers is from 40 wt %:60 wt % to 65 wt %:35 wt %. The porous mold material of this invention does not have defects such as the inferior fluidity of a molten metal in the mold, or the shrinkage and blowholes in cast products.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: November 24, 1998
    Assignee: Sintokogio, Ltd.
    Inventors: Norihiro Asano, Tatsuhiko Kato
  • Patent number: 5752156
    Abstract: High-temperature-stable, fiber-reinforced beryllium metal matrix composite materials are fabricated using coating, infiltration and hot-pressing procedures. High-temperature-stable fibers of metal oxides, carbon or silicon carbide are coated with reaction barrier coatings which prevent chemical reactions from occurring at the interface with the surrounding metallic beryllium matrix at temperatures up to close to the melting point of beryllium. Coatings such as yttria, YAG and mixtures of yttria and YAG or of yttria and beryllia are employed exterior of metal oxide fibers, such as alumina or alumina-silica fibers. Suitable reaction barrier coatings are also employed over carbon fibers (or silicon carbide fibers) which preferably include an interior coating of elemental silicon upon the exterior surface of the carbon fibers. Oxide coatings are preferably applied by immersion in a liquid bath containing a suitable coating solution, preferably an alcohol solvent alkoxide sol-gel.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: May 12, 1998
    Assignee: General Atomics
    Inventors: Kuo-Chun Chen, Paul W. Trester, Khodabakhsh S. Mazdiyasni
  • Patent number: 5594932
    Abstract: In a method for the manufacture of an encased high critical temperature superconducting wire by the "powder in tube" method, prior to the introduction of a compressed rod of superconducting material into a silver tube, the rod is heat treated so that grains of unwanted phase are reabsorbed. The tube can be drawn more easily, and strands can be produced with a regular geometry and no defects. The wire is constituted by 15 .mu.m to 20 .mu.m thick filaments (30) with a form factor of more than 60.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: January 14, 1997
    Assignee: Alcatel Alsthom Compagnie General d'Electricite
    Inventors: Gerard Duperray, Denis Legat
  • Patent number: 5589652
    Abstract: In the metallic member of the invention, ceramic super fine particles, and solid lubricant particles or short size fibers are dispersed, and the grain size of the ceramic particles is smaller than the solid lubricant particle size or fiber diameter.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: December 31, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Toshiaki Arato, Yasuhisa Aono, Shigeo Tsuruoka, Katsuhiro Komuro
  • Patent number: 5518383
    Abstract: To manufacture a reflector formed by a reflective metallic layer on a metallic matrix composite support, a metallic layer having a reflective surface whose shape is at least approximately identical to the required geometrical shape is disposed on a mold surface having a geometrical shape complementary to the required geometrical shape of the reflector. Fibers to constitute the composite support are draped on the metallic layer. They are metallized by the metallic or intermetallic material to form the metallic matrix. This layer and the metallized fibers are subjected to temperature and pressure conditions adapted to press the reflective surface strongly against the mold surface and to cause diffusion welding of the layer with the metallized fibers and of the metallized fibers with themselves so as to integrate the layer to the composite support during consolidation of the latter.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: May 21, 1996
    Assignee: Aerospatiale Societe Nationale Industrielle
    Inventor: Henri Abiven
  • Patent number: 5506061
    Abstract: A method for preparing deagglomerated fibres and/or particles and for providing the fibres and/or particles with a substantially uniform protective coating, the fibres and/or particles being of a material selected from the group consisting of carbides oxides, nitrides, silicides, borides, metals and graphite, including SiC, TiC, ZrC, WC, NbC, AlN, TiN, BN, Si.sub.3 N.sub.4, MgO, Al.sub.2 O.sub.3, SiO.sub.2, ZrO.sub.2, Fe.sub.2 O.sub.3, Y.sub.2 O.sub.3, steel, tungsten, molybdenum and carbon, the method comprising (a) preparing an inorganic colloid sol, and (b) mixing the fibres and/or particles are deagglomerated and substantially homogeneously distributed. The fibres and/or particles, e.g. SiC whiskers provided with an aluminum oxide coating by treatment with an aluminum hydroxide-based sol, are used for the preparation of metal matrix composite materials, e.g. based on aluminum or an aluminum alloy.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: April 9, 1996
    Assignee: Forskningscenter Riso
    Inventors: Bruno Kindl, Yi-Lin Liu, Niels Hansen
  • Patent number: 5494634
    Abstract: Graphite or carbon particles with a graphitic skin are intercalated with a compound including an oxidized form of a metal and then reduced in a hydrogen atmosphere. This process reduces the driving force for the galvanic reaction between the particles and active metals in aqueous environments. The particles may be present as a reinforcement for a metal matrix (e.g., graphite/aluminum metal matrix composites) or as a reinforcement for a non-metallic material (e.g., graphite/polyimide, graphite/polyester or graphite/cyanate composites). In the latter case, the composite is adjacent to a metal in a structure.By way of example, the graphite or carbon particle may be a fiber, the metal subject to attack may be aluminum or magnesium, and the intercalation compound may be NiCl.sub.2.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: February 27, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Alan S. Edelstein, Richard K. Everett, Patricia P. Trzaskoma, Benji Maruyama
  • Patent number: 5492768
    Abstract: A porous living body repairing member obtained by compression-molding a metal fiber material into a desired shape, sintering the fiber mesh body or thereafter, and imparting a compressive stress of not more than 4.00 to 40.0 MPa to provide a porous living body repairing member having a compressive elasticity of not more than 2000 MPa and a permanent deformation of not more than 1% under a stress below a compressive yield stress.The compressive yield stress becomes approximately equal to the above compressive stress, and almost complete elasticity of a permanent deformation rate of not more than 0.1% is shown with respect to a compressive stress below this compressive yield stress. Accordingly, even when the porous living body repairing member is used at a high compressive load site such as man's lumbar body, permanent deformation hardly occurs.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: February 20, 1996
    Assignee: Kyocera Corporation
    Inventors: Hideaki Okimatsu, Yasunori Tamura
  • Patent number: 5487771
    Abstract: A high-porosity metallic membrane element comprising a sintered element having at least about 55% porosity, the sintered element comprising a matrix of substantially interconnected pores, each of the pores being defined by a plurality of dendtritic metallic particles. A preferred form is made from pure nickel, preferably filamentous nickel powder. The high-porosity metallic membrane element, comprising the aforementioned sintered element having at least about 55% porosity, can be sealed within a filter housing to produce a highly porous filter device with a filtered fluid flow path through the metal membrane element. Also disclosed is a method of making the high-porosity metallic membrane element which includes depositing by air-laying techniques a substantially uniform low-density bed of a sinterable dendritic material into a mold suitable for applying compressive force thereto, compressing the low-density bed of sinterable dendritic material to form a green form, and sintering the green form.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: January 30, 1996
    Assignee: Millipore Corporation
    Inventor: Robert S. Zeller
  • Patent number: 5466311
    Abstract: A method of manufacturing an Ni--Al intermetallic compound matrix composite comprising steps of a) providing an aluminum powder, b) providing a reinforced material, c) providing a reducing solution containing a reducing agent and nickel ions to be reduced, d) adding the aluminum powder and the reinforced material into the reducing solution, and e) permitting the reducing agent to reduce the nickel ions to be respectively deposited on the aluminum powder and the reinforced material. Such method permits the Ni--Al, Ni--Al+B intermetallic compound matrix composite to be produced inexpensively/efficiently/fastly.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: November 14, 1995
    Assignee: National Science Council
    Inventors: Chen-Ti Hu, Wen-Chih Chiou
  • Patent number: 5460640
    Abstract: A fully dense ceramic-metal body including 40-88 v/o of an oxide hard phase of, in v/o of the body, 4-88 v/o M-aluminum binary oxides, where the binary oxide has a C-type rare earth, garnet, .beta.-MAl.sub.11 O.sub.18, or perovskite crystal structure, and M is a lanthanide or indium, and 0-79 v/o .alpha.-alumina; about 10-50 v/o of a hard refractory carbide, nitride, or boride as a reinforcing phase; and about 2-10 v/o of a dispersed metal phase combining Ni and Al mostly segregated at triple points of the microstructure. The preferred metal phase contains a substantial amount of the Ni.sub.3 Al ordered crystal structure. In the preferred body, the reinforcing phase is silicon carbide partially incorporated into the oxide grains, and bridges the grain boundaries. The body including a segregated metal phase is produced by densifying a mixture of the hard phase components and the metal component, with the metal component being present in the starting formulation as Ni powder and Al powder.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: October 24, 1995
    Assignee: Valenite Inc.
    Inventor: Sergej-Tomislav Buljan
  • Patent number: 5456740
    Abstract: A getter-filter composite membrane element, comprising a sinterable getter material and a sinterable metal filter material, the composite element defining a matrix of substantially interconnected pores. Membrane elements may be comprised of at least three alternating layers of a first sinterable getter material layer and a second sinterable metal filter material layer, the first getter layer being located between the second filter layers, the second layers acting to hold the getter layer, and to retain the getter particles. Also disclosed is a method of making the getter-filter element.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: October 10, 1995
    Assignee: Millipore Corporation
    Inventors: James T. Snow, Walter Plante, Robert S. Zeller
  • Patent number: 5437834
    Abstract: A porous living body repairing member obtained by compression-molding a metal fiber material into a desired shape, sintering the fiber mesh body or thereafter, and imparting a compressive stress of not more than 4.00 to 40.0 MPa to provide a porous living body repairing member having a compressive elasticity of not more than 2000 MPa and a permanent deformation of not more than 1% under a stress below a compressive yield stress.The compressive yield stress becomes approximately equal to the above compressive stress, and almost complete elasticity of a permanent deformation rate of not more than 0.1% is shown with respect to a compressive stress below this compressive yield stress. Accordingly, even when the porous living body repairing member is used at a high compressive load site such as man's lumbar body, permanent deformation hardly occurs.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: August 1, 1995
    Assignee: Kyocera Corporation
    Inventors: Hideaki Okimatsu, Yasunori Tamura
  • Patent number: 5405654
    Abstract: A self-cleaning chemical vapor deposition (CVD) apparatus and method allow CVD reactors to operate long periods of time without manual removal of extraneous materials such as soot and fuzz. The apparatus is made self-cleaning by superposing a scraping member having a surface, such as a glass rod, over an inner surface of a reactor, and effecting relative movement between the inner surface and scraping member surface. Preferably the reactor is tilted at an angle to horizontal to enhance removal of extraneous material.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: April 11, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Thomas Gabor, James M. O'Kelly, Joseph H. Eaton
  • Patent number: 5383062
    Abstract: The present invention provides a CFRP-made optical cylinder comprising, as the main CFRP layers, (a) CFRP layers containing a carbon fiber arranged in a direction substantially parallel to the cylinder axial direction and (b) CFRP layers containing a carbon fiber arranged in a direction making an angle of substantially.+-.(40.about.50) degree to the cylinder axial direction, in which cylinder at least 50% by weight of the carbon fiber arranged in a direction substantially parallel to the cylinder axial direction has a linear expansion coefficient of -1.times.10.sup.-6 /.degree.C. or less and at least 50% by weight of the carbon fiber arranged in a direction making all angle of substantially.+-.(40.about.50) degree to the cylinder axial direction has a linear expansion coefficient of -1.times.10.sup.-6 /.degree.C. or less, and which cylinder has a linear expansion coefficient of -0.5.times.10.sup.-6 /.degree.C. to 0.5.times.10.sup.-6 /.degree.C. in the axial direction.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: January 17, 1995
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Kunihiko Sato, Kazuo Morohashi, Hidetoshi Takahashi
  • Patent number: 5378426
    Abstract: Metal particulates and porous metal media, which have enhanced resistance to undesirable oxidation, and methods of producing the same are provided. The porous metal media comprise sintered metal particulates each typically having a core and a surface and a diameter in the range of 0.25 to 50 micrometers, the particulates comprising at least about 60 wt. % of a base metal including at least one of iron and nickel, at least about 11 wt. % chromium and no more than about 0.03 wt. % carbon. The surfaces of the particulates are enriched with at least one treatment element in an amount and depth sufficient to enhance the resistance of the particulates to undesirable oxidation. The invention also includes a fine metal filter medium formed from sintered metal fibers, which has enhanced resistance to corrosion and/or to high temperature oxidation.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: January 3, 1995
    Assignee: Pall Corporation
    Inventors: Stephen A. Geibel, John L. Hurley, Sandra L. Brosious
  • Patent number: 5364442
    Abstract: A composite electrode for electrochemical processing having improved high temperature properties, and a process for making the electrode by combustion synthesis. A composition from which the electrode is made by combustion synthesis comprises from about 4% to about 90% by weight of a particulate or fibrous combustible mixture which, when ignited, is capable of forming an interconnected network of a ceramic or metal-ceramic composite, and from about 10% to about 60% by weight of a particulate or fibrous filler material capable of providing the electrode with improved oxidation resistance and maintenance of adequate electrical conductivity at temperatures above 1000.degree. C. The filler material is molybdenum silicide, silicon carbide, titanium carbide, boron carbide, boron nitride, zirconium boride, cerium oxide, cerium oxyfluoride, or mixtures thereof.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: November 15, 1994
    Assignee: Moltech Invent S.A.
    Inventor: Jainagesh A. Sekhar
  • Patent number: 5340531
    Abstract: A method for producing a substantially silica-free composition of matter comprising a matrix of MoSi.sub.2 having SiC dispersed therein, the matrix being reinforced with a particulate ductile refractory metal, the method comprising providing a composite of the particulate ductile refractory metal and a substantially silica-free composite mechanical alloy powder comprising MoSi.sub.2 and SiC having a composition in that segment of the ternary diagram of FIG. 1 designated A, and consolidating the composite of particulate ductile refractory metal and mechanical alloy powder; the coefficient of thermal expansion of the MoSi.sub.2 matrix having SiC dispersed therein being substantially equivalent to that of the particulate ductile refractory metal. The composition of matter formed by the method and an article of manufacture comprising the same are also disclosed.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: August 23, 1994
    Assignee: University of Florida
    Inventors: S. Jayashankar, Michael J. Kaufman
  • Patent number: 5316718
    Abstract: A composite electrode for electrochemical processing having improved high temperature properties, and a process for making the electrode by combustion synthesis. A composition from which the electrode is made by combustion synthesis comprises from about 40% to about 90% by weight of a particulate or fibrous combustible mixture which, when ignited, is capable of forming an interconnected network of a ceramic or metal-ceramic composite, and from about 10% to about 60% by weight of a particulate or fibrous filler material capable of providing the electrode with improved oxidation resistance and maintenance of adequate electrical conductivity at temperatures above 1000.degree. C. The filler material is molybdenum silicide, silicon carbide, titanium carbide, boron carbide, boron nitride, zirconium boride, cerium oxide, cerium oxyfluoride, or mixtures thereof.
    Type: Grant
    Filed: June 14, 1991
    Date of Patent: May 31, 1994
    Assignee: Moltech Invent S.A.
    Inventor: Jainagesh A. Sekhar
  • Patent number: 5306462
    Abstract: A method of making a tantalum capacitor of improved specific capacitance (and volumetric efficiency) is described. Short tantalum fibers are precipitated out of a carrier liquid to form a felt, or tumbled to form fiber containing particles, and in either case subsequently bonded so as to form a felt or particles containing the fibers in random orientation in substantially non-aligned array. These particles or felt are heated to bond the fibers together, purify and (optionally) cylindricalize them. The felt or particles can be processed in conventional fashion thereafter to form the capacitor. Cylindricalized fibers and pellets of increased surface area are also described.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: April 26, 1994
    Assignee: Cabot Corporation
    Inventor: James A. Fife
  • Patent number: 5284531
    Abstract: A method of making a tantalum capacitor of improved specific capacitance (and volumetric efficiency) is described. Short tantalum fibers are precipitated out of a carrier liquid to form a felt, or tumbled to form fiber containing particles, and in either case subsequently bonded so as to form a felt or particles containing the fibers in random orientation in substantially non-aligned array. These particles or felt are heated to bond the fibers together, purify and (optionally) cylindricalize them. The felt or particles can be processed in conventional fashion thereafter to form the capacitor. Cylindricalized fibers and pellets of increased surface area are also described.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: February 8, 1994
    Assignee: Cabot Corporation
    Inventor: James A. Fife
  • Patent number: 5198187
    Abstract: An improved method of forming a composite body of a metal, intermetallic or ceramic matrix reinforced with niobium filaments, particles, platelets or mixtures thereof, the method comprising admixing the niobium reinforcing material with powders of the matrix component elements, forming the admixture into a desired shape and converting the powders to a matrix reinforced with the niobium material, the improvement wherein the reinforcing material has a surface coating thereon of a compound Nb.sub.2 O.sub.5, wherein the compound NbO reacts during formation of the matrix with a portion of at least one of the powdered elements to form a barrier layer at the reinforcer-matrix interface to prevent further reaction between the reinforcer and the matrix component elements. Also disclosed is a method of treating niobium particles, filaments, platelets or mixtures thereof by exposing the surface thereof to molecular O.sub.2 at temperatures and pressure conditions such that the niobium and molecular O.sub.
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: March 30, 1993
    Assignee: University of Florida
    Inventors: Lixion Lu, Atul B. Gokhale, Reza Abbaschian
  • Patent number: 5191486
    Abstract: The present invention provides a CFRP-made optical cylinder comprising (a) CFRP layers containing a carbon fiber arranged in a direction substantially parallel to the cylinder axial direction and (b) CFRP layers containing a carbon fiber arranged in a direction nearly orthogonal to the cylinder axial direction, in which cylinder the carbon fiber arranged in a direction substantially parallel to the cylinder axial direction has a minus thermal expansion coefficient and the cylinder axial direction has a thermal expansion coefficient of -0.5.times.10.sup.-6 /.degree.C. to 0.5.times.10.sup.-6 /.degree.C. In the present optical cylinder, a sharp image can be maintained without making the correction of the optical axis even when the atmospheric temperature changes largely.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: March 2, 1993
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Kunihiko Sato, Kazuo Morohashi, Hidetoshi Takahashi
  • Patent number: 5152828
    Abstract: The present invention relates to a method of producing a mold material used for obtaining a mold for casting metals such as Zn, Al and the like or molding resins. In the method, the short fibers having an aspect ratio of 30 to 300 and obtained by cutting ferritic stainless steel long fibers having a width of 100 .mu.m or less, ferritic stainless steel powder and at least one of Cu powder and Cu alloy powder are used as raw materials. The raw materials are blended to obtain a material mixture which is then compressed under pressure in a Cold Isostatic Press process. The thus obtained compressed product is sintered in a vacuum atmosphere. The sintered material is held in an atmosphere of nitrogen gas or decomposed ammonia gas so that 0.3 to 1.2 wt % of nitrogen is added to the stainless steel in the sintered material. The thus obtained mold material has a hardness of HMV 250 to 500.
    Type: Grant
    Filed: October 8, 1991
    Date of Patent: October 6, 1992
    Assignee: Sintokogio Ltd.
    Inventor: Tatsuhiko Katoh
  • Patent number: 5106825
    Abstract: A method of fabricating a rugged, flexible, superconducting wire comprising: mixing a superconducting material, such as YBa.sub.2 Cu.sub.3 O.sub.x, with a metallic powder to form a metal/superconductor mixture; and loading a metal shell or tube with the metal/superconductor mixture to form a superconducting wire. The superconducting wire may also be cold drawn and annealed to form a very dense wire. The metallic powder is either copper, copper alloy, aluminum or other face centered cubic element. Additionally, a superconducting wire may be formed by encapsulating a superconducting filament within a metal shell.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: April 21, 1992
    Assignee: Olin Corporation
    Inventors: Frank N. Mandigo, Joseph Winter, Bruce M. Guenin, George J. Muench
  • Patent number: 5101560
    Abstract: A method for making an anisotropic or predominantly unidirectional wick primarily for use in heat pipes is disclosed unidirectional heat pipe wicks is made by supporting magnetically susceptible particles on a wire screen and moving the screen inside a magnetic field until the characteristic cone or point shapes assumed by the particles are aligned in a laid down orientation. The particles are then heat treated to yield a sintered wick. An example of a wick made with nickel powder demonstrates improved wicking in the direction pointed to by the laid down points. A wick is also made by the spinning pipe-slurry method for making heat pipe wicks. Magnetically susceptible powder is mixed into a viscous binder to make a slurry, then injected inside a rotating cylindrical heat pipe container. A magnetic field is created around the spinning container and varied to align the particles in a desired structure.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: April 7, 1992
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John F. Leonard, Brian G. Hager
  • Patent number: 5096663
    Abstract: Composites of a matrix of metal fibers and carbon fibers interlocked in and interwoven among a network of fused metal fibers are inherently capable of displaying a broad range of values of a particular physical property. Where the composite is made by sintering a preform of the fiber network dispersed in a matrix of an organic binder, the value of the physical property of the resulting composite is a function of several independent variabiles which can be controlled during composite fabrication. With particular regard to the capacitance of a stainless steel-carbon fiber electrode, there is described a method of optimizing capacitance during electrode fabrication.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: March 17, 1992
    Assignee: Auburn University
    Inventor: Bruce J. Tatarchuk
  • Patent number: 5051231
    Abstract: A method for the fabrication of a superplastic composite material having metallic aluminum reinforced with silicon nitride includes thoroughly mixing silicon nitride with metallic aluminum, pressure-sintering the resultant mixture, further heating and pressing the sintered mixture, hot extrusion-molding the resultant sintered article, subjecting the molded article, when necessary, to a heat treatment such as the T6 treatment thereby forming a superplastic composite material, and deforming the composite material in a temperature region in which the material exhibits superplasticity.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: September 24, 1991
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Tsunemichi Imai, Mamoru Mabuchi
  • Patent number: 5047205
    Abstract: A method for producing a compacted fully dense permanent magnet by providing a particle charge of a permanent magnet alloy composition from which the article is to be made and placing the charge in a cylindrical container having a generally axially positioned core with the charge surrounding the core within the container. The container and charge are heated to an elevated temperature and extruded to compact the charge to a substantially fully dense permanent magnet article.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: September 10, 1991
    Assignee: Crucible Materials Corporation
    Inventors: Vijay K. Chandhok, Robert F. Krause, Bao-Min Ma, John J. DuPlessis
  • Patent number: 5030277
    Abstract: A method for fabricating a titanium aluminide composite structure consisting of a filamentary material selected from the group consisting of silicon carbide, silicon carbide-coated boron, boron carbide-coated boron, titanium boride-coated silicon carbide and silicon-coated silicon carbide, embedded in an alpha-2 titanium aluminide metal matrix, which comprises the steps of providing a first beta-stabilized Ti.sub.3 Al powder containing a desired quantity of beta stabilizer, providing a second beta-stabilized Ti.sub.3 Al powder containing a sacrificial quantity of beta stabilizer in excess of the desired quantity of beta stabilizer, coating the filamentary material with the second powder, fabricating a preform consisting of the thus-coated filamentary materials surrounded by the first powder, and applying heat and pressure to consolidate the preform.The composite structure fabricated using the method of this invention is characterized by its lack of a denuded zone and absence of fabrication cracking.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: July 9, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Daniel Eylon, William C. Revelos, Paul R. Smith, Jr.
  • Patent number: 5022918
    Abstract: A heat-resistant aluminum alloy sinter comprises 5 to 12% by weight of Cr, less than 10% by weight of at least one selected from the group consisting of Co, Ni, Mn, Zr, V, Ce, Fe, Ti, Mo, La, Nb, Y and Hf, and the balance of Al containing unavoidable impurities. A silicon carbide fiber is included for reinforcing the sinter in a fiber volume fraction range of 2 to 30%.
    Type: Grant
    Filed: December 1, 1988
    Date of Patent: June 11, 1991
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Seiichi Koike, Hiroyuki Horimura, Masao Ichikawa, Noriaki Matsumoto
  • Patent number: 5015289
    Abstract: A manufacturing method for a metal body by means of injection molding that comprises the steps of mixing and kneading a metal powder with short fibers such as metallic fibers, carbon fibers and an organic binder, injection-molding the kneaded mixture to form a green body, removing the organic binder from the green body, and sintering the brown body. The short fibers are added in an amount ranging from about 0.1 to 20 wt. % against 100 wt. % of the metal powder and have a melting point of at least 350.degree. C., and at the time of sintering the fibers not less than 30 vol. % become fused and then integrated with the metal. The short fibers act as a reinforcement, strengthening the brown body as well as preventing deformation and cracking of the green body during debinding.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: May 14, 1991
    Assignee: King Invest Co., Ltd.
    Inventors: Takuo Toda, Masao Tsuda
  • Patent number: RE36249
    Abstract: A high-porosity metallic membrane element comprising a sintered element having at least about 55% porosity, the sintered element comprising a matrix of substantially interconnected pores, each of the pores being defined by a plurality of dendtritic metallic particles. A preferred form is made from pure nickel, preferably filamentous nickel powder. The high-porosity metallic membrane element, comprising the aforementioned sintered element having at least about 55% porosity, can be sealed within a filter housing to produce a highly porous filter device with a filtered fluid flow path through the metal membrane element. Also disclosed is a method of making the high-porosity metallic membrane element which includes depositing by air-laying techniques a substantially uniform low-density bed of a sinterable dendritic material into a mold suitable for applying compressive force thereto, compressing the low-density bed of sinterable dendritic material to form a green form, and sintering the green form.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: July 13, 1999
    Assignee: Millipore Investment Holdings, Inc.
    Inventor: Robert S. Zeller