Patents Examined by Wayland Stallard
  • Patent number: 4863527
    Abstract: A process is disclosed for producing doped tungsten wire having a combination of relatively low strength and high ductility. The process involves swaging recrystallized rod to a diameter of from about 80 to about 125 mil, drawing this rod into wire having a diameter of from about 52 to about 62 mil, and stress-relief annealing the wire to impart the combination of low strength and high ductility to the wire when it is drawn to about 35 to about 37 mils.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: September 5, 1989
    Assignee: GTE Products Corporation
    Inventors: Gene T. Schaeffer, Thomas J. Patrician, Paul L. Bloss
  • Patent number: 4830681
    Abstract: An oxygen cutting device comprising two cutting oxygen jets conducted through passageways with a passageway therebetween for a carburizing flame ensuring a reheating at depth of the rough-cut kerf which is effected by the first cutting oxygen jet and is finished by the second cutting oxygen jet.
    Type: Grant
    Filed: March 24, 1988
    Date of Patent: May 16, 1989
    Assignee: L'Air Liquide
    Inventors: Michel Arnout, Eric Dufour, Roger Le Goff
  • Patent number: 4830683
    Abstract: The invention relates to apparatus and accompanying methods for use therein for forming a material (504), which has high strength and good workability, by rapidly deforming a suitable base metal (501) having a banded structure, such as illustratively a previously cold worked plain low carbon steel alloy, in order to generate a high rate of change in its internal energy which depresses the transformation temperatures of the base metal and thereby induces an allotropic phase transformation to occur therein. This rapid deformation can be produced through rolling, extrusion or forging and causes an extremely high heating rate to occur at each surface of the base metal. Prior to being deformed, the base metal is maintained at a fairly low temperature, e.g. at or near room temperature. The tooling, preferably rolls, that is used to provide the deformation is maintained at a modestly elevated temperature.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: May 16, 1989
    Assignee: MRE Corporation
    Inventor: Hugo S. Ferguson
  • Patent number: 4824478
    Abstract: A method and apparatus for producing fine metal powder. The method includes the steps of forming a centrifugally maintained annulus of a liquified gas quench medium, forming molten metal drops within the eye of the annulus, urging the drops into the quench medium to solidify the drops, and boiling away the quench medium to leave behind clean, unentrained metal powder. The apparatus includes a drum for containing a liquified gas quench medium, means for adding liquified gas to the inside of the drum, and means for rotating the drum to form an annulus of quench medium. The apparatus further includes means for forming molten metal to be made into powder, and means disposed along the longitudinal axis of the drum and within the eye of the annulus for creating molten metal drops. The molten metal drops are then urged into the quench medium to solidify them into a powder, and the quench medium is boiled away to leave behind clean, unentrained metal powder.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: April 25, 1989
    Assignee: Nuclear Metals, Inc.
    Inventors: Peter R. Roberts, James J. Airey, James E. Blout, Joseph J. Airey
  • Patent number: 4822409
    Abstract: The thermostable amorphous ferromagnetic powder containing iron, cobalt, or nickel, also comprises xylene for 0.2 to 25% by volume of the powder particles, up to 20% chrome and boron by weight, and lithium or magnesium in amounts from 0.1 to 2.0% by weight. The powder is resistant to oxidizing up to temperatures of 250.degree. C. and has a specific surface up to 160m.sup.2 /g.The method for its manufacture comprises reduction of a solution containing salts of iron, cobalt, chrome, a complexing agent, and metal salts or polyvalent alcohols by means of a reductant sodium borohydride in the presence of sodium hydroxide. The solution is protected by an organic hydrophobic substance - xylene during a period from 5 seconds to 10 minutes in the presence of a magnetic field.The device for manufacture of the thermostable amorphous ferromagnetic powder comprises a vertical reactor with a stirrer and electromagnet generating a magnetic field.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: April 18, 1989
    Assignee: VMEI Lenin, Quartal Darvenitza
    Inventors: Dimiter T. Butchkov, Yovka D. Dragieva, Zvetan K. Nikolov, Georgi G. Georgiev, Mina S. Slavtcheva-Staikova, Ivanka S. Grozdanova
  • Patent number: 4819917
    Abstract: An apparatus for deburring workpieces by gas detonation comprises a bed (1) having mounted thereon a casing (2) open at one end (4), and an indexing table (6) with bottoms (7) arranged alternately in front of the open end (4) of the casing (2). There is also provided a drive (9) for moving the bottom (7) toward the open end (4) of the casing (2) to form during their connection a gas detonation chamber (10), and a system (13) for feeding gases thereto for forming an explosive mixture with a spark plug (15). Connection of the casing (2) to the bottom (7) is done by a bayonet joint (16) one element of which is kinematically linked with a drive (17) for turning it relative to the other element.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: April 11, 1989
    Assignee: Spetsialnoe Konstruktorskoe Bjuro Gidroimpulsnoi Techniki Sibirskogo Otdeleniva Akademii Nauk SSSR
    Inventors: Alexandr F. Cherendin, Oleg I. Stoyanovsky, Lev N. Shepelev, Vladislav V. Mitrofanov, Viktor I. Manzhalei, Abram D. Tsemakhovich, Georgy P. Moskvitin, Valery G. Galutsky
  • Patent number: 4818279
    Abstract: Granulation device comprising means for heating a material to be granulated in order to cause its melting and means for supplying the molten material to a container (1) terminated by an orifice (9) for spraying the material in the form of droplets at the entrance of a cooling housing wherein the droplets solidify into granules. Said container comprises on at least one portion of its inner wall raised helical elements imposing a helical blade-type circulation to the molten material, said helical elements (5,6,7) being comprised of grooves provided in a generally cylindrical part (4) which is housed without any clearance into a cylindrical portion of said container (1).
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: April 4, 1989
    Assignee: Extramet Industrie S.A.
    Inventors: Bernard Chaleat, Philippe Vaxelaire
  • Patent number: 4818280
    Abstract: Nonferrous metal powder or nonferrous metal powder mixtures are made by reacting a metal compound in an aqueous medium with an aqueous sugar or starch solution with stirring and optionally at an elevated temperature and the precipitated metal powder is separated. The nonferrous metal oxide or hydroxide in a concentration between 20 and 400 g/l (calculated as metal) is treated in the aqueous medium at a pH-value above 3.2 and at a temperature between 20.degree. and 160.degree. C. and the virtually oxide free nonferrous metal powder which is precipitated is separated. Oxides or hydroxides of the metals Cu, Ag, Ni, Co, Sn, Pb, Sb, As, or Bi are used.
    Type: Grant
    Filed: April 7, 1988
    Date of Patent: April 4, 1989
    Assignee: Norddeutsche Affinerie Aktiengesellschaft
    Inventors: Bernd Langner, Artur May, Rene-Holger Wilde
  • Patent number: 4816069
    Abstract: A method for converting cobalt to cobalt powder is disclosed which comprises heating a starting mixture of cobalt and zinc in a non-reacting atomosphere at a first temperature of below the boiling point of zinc up to about 900.degree. C. in a non-reacting atmosphere for a length of time sufficient to cause the alloying of a portion of the zinc and cobalt, with the weight ratio of zinc to cobalt being less than about 10. The temperature of the resulting partially alloyed mixture is slowly raised to a second temperature of from about 900.degree. C. to about 960.degree. and is maintained for a time sufficient only to form a reaction product in which essentially all of the cobalt is alloyed with zinc and to keep the evaporation of zinc to a minimum. The reaction product is then heated at a pressure below atmospheric pressure at a third temperature of no greater than about 950.degree. C.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: March 28, 1989
    Assignee: GTE Products Corporation
    Inventors: Alan D. Douglas, Martin B. MacInnis, Clarence D. Vanderpool
  • Patent number: 4816067
    Abstract: A process is disclosed for producing fine spherical particles from a fine powder feed material which comprises entraining the powder feed material in a carrier gas, introducing the feed material and carrier gas through a powder port into a high temperature zone and maintaining the powder feed material in the high temperature zone for a sufficient time to melt at least about 50% by weight of the particles of the powder and to form droplets therefrom while at the same time allowing one or more streams of gas to come into contact intermittently with any powder which has accumulated in the vicinity of the powder port to keep the vicinity clear of powder to allow the powder feed to pass unobstructively through the powder port into the high temperature zone. The droplets are then cooled to form spherical particles.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: March 28, 1989
    Assignee: GTE Products Corporation
    Inventors: Nelson E. Kopatz, Jack E. Vanderpool
  • Patent number: 4812166
    Abstract: Ultrafine particles of metals, metallic compounds, and ceramics can be produced by heating a starting material supplied hermetically with a plurality of direct current plasma currents combined at a central axis of a work coil for generating high frequency induction plasma positioned under the direct current plasma generated zone. Apparatuses used therefor are also disclosed.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: March 14, 1989
    Assignee: Nippon Steel Corporation
    Inventors: Goro Saiki, Jiro Kondo, Koichi Takeda, Mutsuo Maki, Tutomu Ooki
  • Patent number: 4810288
    Abstract: An apparatus and method for forming essentially contaminant free metal powders of varying particle diameter by utilizing a separate gas percolation chamber for admitting a separate clean variable pressure percolating gas into a molten metal passing through a transfer tube, forming a metal froth which is sprayed into a reduced pressure collection chamber. The metal froth then disintegrates providing a finely divided powder which is cooled in the suspension state and collected. By utilizing a separate percolation chamber for independently pressurizing the metal froth, impurities are reduced and froth characteristics and controllably modifiable thereby providing essentially contaminant free metal powder of varying particle diameter. In addition, pressure equalization means are disclosed for overcoming pressure imbalances on start-up.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: March 7, 1989
    Assignee: United Technologies Corporation
    Inventors: Christopher M. Baszczuk, Bruce A. Quimby
  • Patent number: 4809956
    Abstract: A gas torch comprises a body with at a first end adjuster valves for connection to fluid supplies and at a second end a torch tip. At the first end there is a support from which the body extends to the tip. The body is made up of sections of rigid tube articulated and connected to each other by articulation and fluid passage connection devices. These ensure continuity of fluid circulation between the sections of tube. The sections of tube near the support are articulated to the support by articulation and fluid passage connection devices enabling them to be connected to the valves. Maneuvering means are articulated to the supports and to at least the sections of tube near the support so as to enable remote displacement of the tip. The tip is supplied with fluid by some at least of the articulated sections of tube constituting the body.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: March 7, 1989
    Inventor: Michel Donze
  • Patent number: 4810285
    Abstract: In a process for preparing a spherical copper fine powder having an average grain size ranging from 0.1 .mu.m to a few .mu.m, by use of chemical vapor deposition of cuprous chloride vapor with a reducing gas, the vapor deposition zone is maintained at a temperature ranging 900.degree. C. to less than 1,150.degree. C. and the generated particles are quenched subsequently. The generated powder is utilized as a conductive powder which is the main component of a conductive paste.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: March 7, 1989
    Assignee: Kawasaki Steel Corporation
    Inventors: Kenichi Otsuka, Minoru Nitta
  • Patent number: 4810284
    Abstract: A method for producing metal powder comprising steps of feeding a molten metal into a closed vessel, atomizing of the metal by inert gas and finally cooling of particles in an atmosphere of inert gas and atomized water is provided.An apparatus for producing metal powder comprises a closed vessel (1) provided with atomizing nozzles (2) and means for providing inert gas, and another set of nozzles (4) for supply of atomized cooling medium located on one or several vertically displaced levels along the internal perimeter of the vessel (1).
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: March 7, 1989
    Assignee: Norsk Hydro a.s.
    Inventors: Lars Auran, Ivar O. Rod, Ole Tangen, Alf E. Gravem
  • Patent number: 4808216
    Abstract: In a process for producing an ultrafine powder of a metal by subjecting a transition metal carbonyl compound to gas phase pyrolysis reaction, the improvement which comprises diluting said carbonyl compound with an inert gas or hydrogen to a concentration of 3 vol. % or less with optional addition of an oxygen-containing organic compound and/or a sulfur-containing organic compound in an amount of 0.0001 to 0.1 mol per mol of said carbonyl compound to prepare a gas mixture, and then carrying out gas phase pyrolysis reaction at 300.degree. C. or higher by allowing said gas mixture to reside for 5 seconds or less in a reaction system to which a magnetic field of 100 gauss or higher is being applied, thereby obtaining the ultrafine powder of said metal having a length of 1 micron or less, a coercive force of 800 oersted or higher and a saturation magnetization of 120 emu/g or higher.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: February 28, 1989
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Yoshiteru Kageyama, Yoshiaki Sawada
  • Patent number: 4808486
    Abstract: A machine part such as a cylinder or a feeding screw of an injection molding machine and the like is produced such that a separating metallic plate is inserted in a mold adapted to mold the cylinder or the feeding screw, thereby providing two molding cavities on both sides of the separating plate, and melted metals adapted to form a main portion and a corrosion and wear resistant portion of the cylinder or feeding screw are poured into the two cavities. In this manner the two kinds of metals poured into the two cavities are metallurgically fused together with the separating plate interposed therebetween.
    Type: Grant
    Filed: July 6, 1987
    Date of Patent: February 28, 1989
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Harutoshi Yamamoto, Zenichi Mochizuki, Sadasue Sakomoto
  • Patent number: 4808217
    Abstract: A process is disclosed for producing fine spherical particles from a starting fine powder material which comprises entraining the powder material in a carrier gas, passing the powder material and the carrier gas through a high temperature zone, and maintaining the powder in the high temperature zone for a sufficient time to melt at least about 50% by weight of the particles of the powder and to form spherical particles of the melted portion, allowing the high temperature treated material to come in contact with a reducing atmosphere created by a stream of hydrogen gas, and thereafter rapidly solidifying the resulting high temperature treated material to form spherical particles wherein the oxygen content of the spherical particles is reduced by greater than about 10% by weight from the starting powder.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: February 28, 1989
    Assignee: GTE Products Corporation
    Inventors: Nelson E. Kopatz, Lori S. Pruyne
  • Patent number: 4806155
    Abstract: A method for producing a dysprosium-iron alloy for use in the manufacture of rare-earth element containing, iron-boron permanent magnets. A particle mixture of dysprosium oxide, iron, boron and calcium is compacted, the compact is heated to form a metallic compound comprising dysprosium, boron and iron and to form calcium oxide. There is no need for additives such as calcium chloride that aid in particle disintegration during washing.A particle mass of -35 mesh is produced from the compact. The particle mass is washed with cold water, and the water is reacted with the calcium oxide and calcium to form calcium hydroxide, while preventing oxidation of the particle mass. The calcium hydroxide is removed from the particle mass as by repeated water washing.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: February 21, 1989
    Assignee: Crucible Materials Corporation
    Inventors: Floyd E. Camp, Stanley A. Wooden
  • Patent number: 4806150
    Abstract: An apparatus and method for continuously analyzing liquids by creating a supersonic spray which is shaped and sized prior to delivery of the spray to a analysis apparatus. The gas and liquid are mixed in a converging-diverging nozzle where the liquid is sheared into small particles which are of a size and uniformly to form a spray which can be controlled through adjustment of pressures and gas velocity. The spray is shaped by a concentric supplemental flow of gas.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: February 21, 1989
    Assignee: The United States Department of Energy
    Inventors: Joseph L. Alvarez, Lloyd D. Watson