Patents Examined by Robert L. McDowell
  • Blast pipe for refining nozzle
    Patent number: 4730814
    Abstract: A blast pipe for delivering refining oxygen to the space above a metal bath in a refining operation is presented. The blast pipe is positioned in a gas supply duct and is provided with a pressure regulating valve. The blast pipe comprises a fixed straight wall portion along which the gas flows in a linear path. The straight wall portion terminates at a sharp edge, constituting a portion of the blast pipe exit orifice. A bent wall segment is located adjacent to and downstream of the straight wall portion and connects the remainder of the straight wall portion to the exit orifice. The bent wall segment preferably has a convergent configuration, upstream of the sharp edge, and a divergent configuration downstream thereof. The exit orifice, in cross section, has the shape of a rectangle, one of the long sides of which constitutes the sharp edge.
    Type: Grant
    Filed: February 20, 1987
    Date of Patent: March 15, 1988
    Assignee: Arbed S.A.
    Inventors: Andre Bock, Roamin Henrion, Jean Liesch, Carlo Heintz, Henri Klein, Jean-Francois Liesch
  • Incinerating and melting apparatus
    Patent number: 4728081
    Abstract: Disclosed is an incinerating and melting apparatus for processing materials such as organic matters, inorganic matters and metals, which apparatus has a cylindrical or polygonal horizontal furnace body provided with a material charging port and a melt discharge port formed in the wall thereof, wherein a burner is mounted in the inner surface of the furnace body, the furnace body is oscillatorily rotatable in one and the other directions about its axis, and a melt receiver is detachably secured to the melt discharge port, or wherein the furnace body is fitted in a hood into which the melt discharge port opens and the melt receiver is detachably secured to the hood.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: March 1, 1988
    Assignee: Chiyoda Chemical Engineering & Construction Co., Ltd.
    Inventors: Haruo Nishino, Yoshiharu Tanaka, Yoshiharu Matsui, Madoka Kawakami
  • Aluminum brazing sheet
    Patent number: 4727001
    Abstract: An aluminum brazing sheet for use in brazing comprises;a core material composed of an aluminum alloy containing:0.2-1.0 wt % Cu,0.2-0.8 wt % Mg andat least one of the elements selected from:0.05-0.5 wt % Mn,0.05-0.5 wt % Zr,0.05-0.5 wt % Cr, andthe balance of Al and impurities, anda filler material composed of an Al-Si based alloy brazing material coated on one surface of said core material and a skin material composed of a sacrificial aluminum anode material at a purity higher than 99.0 wt % coated on the other surface of the core material. The aluminum brazing sheet according to this invention is satisfactory in the brazing property and also excellent in the corrosion resistance and the strength, which is suitable as the material for use in aluminum heat exchangers.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: February 23, 1988
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Masao Takemoto, Jun Takigawa, Tomohiro Nishimura, Kikuo Toyose
  • Device for introducing gas into molten metal
    Patent number: 4725047
    Abstract: A device for introducing gas into a mass of molten metal in a container, by way of an opening in the container and a pocket block having a passageway extending vertically therethrough, the pocket block forming a portion of a refractory lining in said container, a refractory plug and an open ended shell thereabout in spaced relation positioned in said passageway in said pocket block to form a gas passageway with said shell and refractory plug extending outwardly of and above said pocket block in protecting relation to said refractory plug with respect to molten metal introduced into said container and so as to form a hot metal dam protecting said gas passageway around said refractory plug. A ceramic plate larger than the refractory plug and pocket block is attached to the plug and pocket block to stop molten metal leaks.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: February 16, 1988
    Inventor: Micheal D. LaBate
  • Lead calcium alloy and process of making same
    Patent number: 4725404
    Abstract: The invention is directed to a lead calcium alloy for electrode grids, the alloy being substantially antimony-free. Copper and/or sulphur in small amounts are added to said alloy in order to significantly improve the casting properties, the mechanical and the corrosion properties.
    Type: Grant
    Filed: June 11, 1986
    Date of Patent: February 16, 1988
    Assignee: Accumulatorenfabrik Sonnenschein GmbH
    Inventors: Winfried Reif, Magdy Abdel-Reihim, Andreas Schuler
  • Zinc-aluminum alloy coatings for steel
    Patent number: 4722871
    Abstract: A zinc-aluminum alloy coating having desirable ductile properties and a uniform fine grain structure having excellent wettability for a ferrous metal substrate comprises greater than about 25 percent by weight aluminum and zinc, wherein the alloy further includes from about 0.1 to about 1.0 percent by weight of a rare earth alloy for enhancing the wettability of the alloy to the ferrous metal and the balance comprises additional additives and impurities. With alloys having increased concentration of aluminum, the solubility of the rare earth alloy is increased, thereby increasing wettability.
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: February 2, 1988
    Assignee: Cosmos Engineering, Inc.
    Inventor: Schrade F. Radtke
  • Sleeve for blowing solid materials into a molten metal bath and method for use thereof
    Patent number: 4721287
    Abstract: The invention relates to a sleeve for blowing solid materials into molten metal baths, specifically molten steel baths, through the wall of a ladle containing the molten metal bath. To improve the characteristics of such a sleeve, the invention proposes that a forward sleeve section, facing the molten metal bath, be made of an insulating material with lower thermal conductivity than that of the material of the middle and rear sleeve section.
    Type: Grant
    Filed: February 19, 1986
    Date of Patent: January 26, 1988
    Assignee: Didier-Werke AG
    Inventor: Manfred Winkelmann
  • Ladle furnace
    Patent number: 4720837
    Abstract: The specification discloses a ladle furnace apparatus for refining molten steel tapped from a steelmaking furnace therein. There are introduced molten steel and a slag making material into the ladle. The outer and inner lids of the ladle furnace are put on the respective receiving surfaces of the ladle to close the opening thereof. In the interior of the ladle, the slag making material is slagged by arc heating thereby to refine molten steel introduced therein by means of the slag. During the refining process, the suction of gas is carried out from a space formed between the outer lid and the inner lid. Therefore, a dust containing gas generated by reaction of the molten steel and slag enters the space between the outer lid and the inner lid passing through a gap formed between the inner lid and the ladle or electrode holes disposed in the inner lid to be sucked therefrom.
    Type: Grant
    Filed: February 12, 1986
    Date of Patent: January 19, 1988
    Assignee: Daidotokushuko Kabushikikaisha
    Inventor: Kenji Kanada
  • Method and apparatus for rapid high temperature ladle preheating
    Patent number: 4718643
    Abstract: This invention relates to ladle heating methods and apparatus. More particularly, this invention pertains to rapid high temperature ladle preheating utilizing an optimized heating cycle by involving oxygen and combustion air preheated by recuperation in the fuel burning process. Controlled oxygen flow directed into the process is used to increase the heat input during the initial preheating phase and to insure maximum efficiency of the system during the soaking phase of ladle preheating. The disclosed ladle preheating station comprises a refractory lined lid including a partially open refractory ring for docking a portion of a ladle rim having a significant protrusion caused by a local accumulation of solidified metal or slag, said refractory lid opening shaped to receive said protrusion within the opening while providing a gap between said metal deposition and the refractory lid.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: January 12, 1988
    Assignee: American Combustion, Inc.
    Inventor: Grigory M. Gitman
  • Palladium alloy for joining ceramics and method of use
    Patent number: 4719081
    Abstract: An alloy for joining ceramics has the following composition, by weight: 65 to 98% palladium; 1 to 20% nickel; 0.5 to 20% chromium; 0.5 to 10% titanium or zirconium; 0 to 10% molybdenum.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: January 12, 1988
    Assignee: GTE Products Corporation
    Inventor: Howard Mizuhara
  • Method of manufacturing zirconium alloy plates
    Patent number: 4717427
    Abstract: For manufacturing zirconium alloy plates, more particularly for forming grids for holding nuclear fuel elements, a strip is obtained by hot rolling, then cold rolling, with a high cold hammering rate, then the strip is subjected to reheating for removing the tension at a temperature lower than the recrystallization temperature. Plates are cut out in the transverse direction of the strip.
    Type: Grant
    Filed: January 8, 1986
    Date of Patent: January 5, 1988
    Assignee: "FRAGEMA"
    Inventors: Michel Morel, Jean-Paul Mardon
  • Zirconium alloy products
    Patent number: 4717434
    Abstract: It has been found that modifying standard Zircaloy alloy processing techniques by limiting the working and annealing temperatures utilized after conventional beta treatment results in Zircaloy alloy product having superior high temperature steam corrosion resistance.
    Type: Grant
    Filed: March 12, 1986
    Date of Patent: January 5, 1988
    Assignee: Westinghouse Electric Corp.
    Inventors: Samuel G. McDonald, George P. Sabol
  • Weld bead electrode for producing same and method of use
    Patent number: 4717536
    Abstract: Weld bead analysis and electrode capable of producing same, which in multiple pass welding of thick steel plates, results in fine grain structure and high impact strength. The analysis includes as necessary ingredients, titanium, nitrogen and chromiumwith a maximum limitation on auminum, if present. The electrode contains titanium and chromium. The welding is in air and the titanium picks up nitrogen from the air and carries it into the weld bead as micro particulates of titanium nitride, which forms nucleation points for commencing fine grain growth.
    Type: Grant
    Filed: January 24, 1986
    Date of Patent: January 5, 1988
    Assignee: The Lincoln Electric Company
    Inventors: Chang-Shung Chai, Jon McCollister
  • Molybdenum-tungsten-titanium-zirconium-carbon alloy system
    Patent number: 4717538
    Abstract: A molybdenum-tungsten-titanium-zirconium-carbon alloy system is disclosed having a composition in percent by weight of from about 0.01 to about 0.15 carbon, from about 0.06 to about 0.20 zirconium, from about 0.40 to about 0.75 titanium, from about 10 to about 60 tungsten, and the balance molybdenum.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: January 5, 1988
    Assignee: GTE Products Corporation
    Inventors: Thomas J. Patrician, Gene T. Schaeffer, Harry D. Martin, III
  • Iron-nickel alloys having improved glass sealing properties
    Patent number: 4711826
    Abstract: The present invention relates to iron-nickel alloys having improved glass sealing properties. Alloys of the present invention contain from about 30% to about 60% nickel, from about 0.5% to about 3% silicon, from about 0.5% to about 3.5% aluminum and the balance essentially iron. Preferably, the alloys have a total aluminum plus silicon content of less than about 4%. The alloys of the present invention have particular utility in electronic and electrical applications. For example, they may be used as a lead frame or a similar component in a semiconductor package.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: December 8, 1987
    Assignee: Olin Corporation
    Inventors: Eugene Shapiro, Michael L. Santella
  • Side-injected metal refining vessel and method
    Patent number: 4711430
    Abstract: A side-injected metal refining vessel having improved lining life having a defined refractory lining orientation in the area above a tuyere.
    Type: Grant
    Filed: April 1, 1986
    Date of Patent: December 8, 1987
    Assignee: Union Carbide Corporation
    Inventor: Jonathan J. Feinstein
  • Copper converter
    Patent number: 4711433
    Abstract: A copper converter which includes: a converter body; a plurality of tuyeres disposed to the converter body, each tuyere having an outer end portion; a first concentrate blowing pipe assembly disposed at least one of said tuyeres, the concentrate blowing pipe assembly including an introducing pipe inserted into the at least one tuyere; a blowing unit, connected to the concentrate blowing pipe assembly, for blowing a material including a concentrate through the introducing pipe into the converter; an air supplying unit, disposed to the tuyeres, for supplying pressurized air to the tuyeres; and formations, disposed to said outer end of each tuyere and said concentrate blowing pipe assembly, for detachably interlocking the introducing pipe with the at least one tuyere.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: December 8, 1987
    Assignee: Mitsubishi Kinzoku Kabushiki Kaisha
    Inventors: Motoo Goto, Hiroshi Kono, Haruhiko Asao, Yukio Miyamoto, Toshihiko Igarashi
  • Thermoelectric Si-Ge alloy composition
    Patent number: 4711971
    Abstract: A thermoelectric alloy composition is described comprising from 5% to 95% silicon, from 95% to 5% Germanium, from 0.01% to 0.2% lead and from 0% to 0.2% tin, all percentages being atomic percentages. In a preferred composition at least 50% silicon and 50% Germanium is present with 0.03% to 0.1% lead and from 0 to 0.05% tin. Tin and lead in combination provide lower thermal conductivity and a greater figure of merit than with lead or tin alone. Other preferred compositions are provided and a thermoelectric material and a p-n coupling thermoelectric generator (10) incorporating the alloy is disclosed. The alloy composition provides high efficiency of power to heat loss and minimizes running costs.
    Type: Grant
    Filed: December 5, 1985
    Date of Patent: December 8, 1987
    Assignee: The University Court of the University of Glasgow
    Inventors: William Duncan, Arthur J. Barlow
  • Gas washing device
    Patent number: 4711432
    Abstract: A gas washing device includes a permeable gas sink, a gas inlet for supplying gas through the sink to a molten metal container, a gas flow meter positioned upstream of the gas inlet, and a further gas sink having a gas permeability greater than that of the first-mentioned gas sink and positioned between the gas inlet and the first-mentioned gas sink.
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: December 8, 1987
    Assignee: Didier-Werke AG
    Inventors: Michael Heinz, Joachim Lange, Udo Muschner, Herbert Naefe, Hans Rothfuss, Manfred Winkelmann, Hans-Joachim Winkler
  • Casing assembly for injecting material into a metallurgical vessel
    Patent number: 4709905
    Abstract: A casing assembly includes a nozzle brick to form part of a wall of a metallurgical vessel. The nozzle brick has therethrough a conical opening defined by a conical inner surface. A casing to be inserted into the conical opening has a truncated conical shape including a conical outer surface and an axially extending flow through opening. The conical opening and the casing have coaxial center axes, and the conical inner and outer surfaces extend at equal angles of inclination to such axes. The conical inner surface is jacketed with a thin metal shell having a conical shape with the same inclination as that of the conical inner and outer surfaces.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: December 1, 1987
    Assignee: Didier-Werke AG
    Inventors: Manfred Winkelmann, Udo Muschner, Pierre Gerber