Patents Examined by Robert L. McDowell
  • Patent number: 4770848
    Abstract: A rapidly-solidified aluminum alloy powder having a nominal composition of 7% Zn, 2.5% Mg, 2% Cu, 0.3% Zr, and 0.3% Cr is used to make a high forming-rate, superplastic, high-strength aluminum alloy. The powder is outgassed, consolidated, and extruded, thereby developing a wide range of particle size distribution of dispersoids in the process, containing respectively zirconium and chromium dispersoids, as well as age hardening precipitates. The consolidated powder is then rolled to 85% reduction to provide a sheet material which is superplastically formed at a temperature in the range of 450.degree. C. to 490.degree. C. and at a rate between 5.times.10.sup.-3 to 5.times.10.sup.-2 per second.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: September 13, 1988
    Assignee: Rockwell International Corporation
    Inventors: Amit K. Ghosh, Chimata Gandhi
  • Patent number: 4768756
    Abstract: A converter for preparing steel having a refractory lining including a wear lining is provided at its bottom with a plurality of gas supply devices for supply of stirring gas to the molten bath in the converter. Each gas supply device has a generally vertical flat panel which comprises at least two flat metal plates joined together to provide a plurality of gas passages between them. The plates are mounted between bricks of the wear lining. To prevent the plates bulging apart, which causes the gas passages to be blocked by steel the plates are connected to each other between their edges at a plurality of locations distributed over the whole of the plate faces in a manner so as to resist the pressure of the gas in the passages. The bricks of the wear lining adjacent the gas supply device are modified in dimensions to accommodate the gas supply device and/or modified in quality compared with the neighboring bricks.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: September 6, 1988
    Assignee: Hoogovens Groep B.V.
    Inventors: Johannes A. M. Butter, Jan S. De Vries
  • Patent number: 4767598
    Abstract: An injection apparatus for introducing fluid material, such as a reactive element to a molten metal bath while resisting undesired oxidation. The injection apparatus consists of a body assembly having a chamber defined therein, and inlet and outlet passageways communicating with the chamber which cooperate to define a passageway therethrough. The lower end of the outlet extends below the surface of the molten metal bath. Purging gas is introduced through a gas inlet and provide a substantially purged atmosphere throughout the molten metal passageway. The atmosphere in the passageway is purged in order that the fluid material can be safely introduced into the molten bath. The injection apparatus is readily assembled and disassembled by means of a unique clamping device employed with the body assembly.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: August 30, 1988
    Assignee: Aluminum Company of America
    Inventors: Michael J. Kinosz, Alan P. Mitchell
  • Patent number: 4767103
    Abstract: A converter pressure control device for use in a converter waste gas disposing device wherein a calculator determines the difference between the pressure in a converter and atmospheric pressure and sets an operating parameter according to the detected difference. A pressure controller generates a control signal in accordance with the operating parameter and the difference in converter pressure and a predetermined value. The control signal is used to operate a damper to control the flow of waste gas through the converter.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: August 30, 1988
    Assignees: Nippon Steel Corporation, Fuji Electric Co., Ltd.
    Inventors: Nobuhiro Sakanashi, Toru Yoshida, Yujiro Ueda, Katsumi Hachiga, Shigeharu Kawai
  • Patent number: 4765954
    Abstract: A rapidly solidified magnesium based alloy contains finely dispersed magnesium intermetallic phases. The alloy has the form of a filament or a powder and is especially suited for consolidation into bulk shapes having superior combination of strength, ductility and corrosion resistance.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: August 23, 1988
    Assignee: Allied Corporation
    Inventors: Santosh K. Das, Chin-Fong Chang
  • Patent number: 4764435
    Abstract: A metal composition usable as a brazing material for bonding a metal to a non-oxide ceramic. The brazing material contains, at least, one or more metals selected from a first group of transition metals consisting of Pt, Pd, Rh, Ir, Ru and Os, and one or more metals selected from a second group of transition metals consisting of Cr, Mn, Fe, Co, Ni and Cu. The material may further contain one or more elements selected from a third group of elements consisting of B, C, Si and P.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: August 16, 1988
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroki Hosizaki, Hirofumi Suzuki, Terutaka Kageyama
  • Patent number: 4759906
    Abstract: A method of producing functional alloys by adding not more than 20 atomic percent Cr to a TiPd alloy with 40-60 atomic percent Ti which develops thermoelastic martensitic transformation, for adjusting the transformation point of the alloy. Such a functional alloy may comprise in addition to the Ti, 0.001-20 atomic percent Cr, the balance being Pd.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: July 26, 1988
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Soji Nenno, Kazuyuki Enami, Kazuhiko Hayashi
  • Patent number: 4758407
    Abstract: A lead free, cadmium free tin and tin/antimony based solder alloy having a wide melting range for joining copper tubes and brass pipe and fittings. The non-toxic tin based solder composition has a range of 92.5-96.9% tin, 3.0-5.0% copper, 0.1-2.0% nickel and 0.0-5.0% silver. The non-toxic tin/antimony based solder composition has a range of 87.0-92.9% tin, 4.0-6.0% antimony, 3.0-5.0% copper, 0.0-2.0% nickel and 0.0-0.5% silver and is especially suited for plumbing applications having tight loose fitting solder joints which are exposed to potable water.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: July 19, 1988
    Assignee: J.W. Harris Company
    Inventors: Richard E. Ballentine, Joseph W. Harris
  • Patent number: 4756452
    Abstract: Disclosed herein is a porous nozzle which is made up of an upper porous brick, a dense brick, and a lower porous brick arranged vertically in layer and a casing surrounding them. The casing is provided with an inert gas supply pipe which leads to the peripheral space of the upper porous brick. The casing is also provided with another inert gas supply pipe which leads to the peripheral space of the lower porous brick.Disclosed also herein is another porous nozzle which is made up of an upper porous brick, a dense brick, and a lower porous brick arranged vertically in layer and a casing surrounding them. The casing is provided with an inert gas supply pipe which leads to the peripheral space of the lower porous brick which communicates with the peripheral space of the upper porous brick.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: July 12, 1988
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Noboru Tsukamoto, Masaru Terao, Hiroyasu Uiji
  • Patent number: 4754954
    Abstract: A device for bubbling gases through molten metal and specially adapted to be used in ladles or metallurgical vessels where it is necessary to stop the flow of gas without risk of penetration of liquid metal through the device. The device includes a metal casing holding a number of refractory plates or concentric cylinders that have opposed, specially roughened surfaces and that have their roughened surfaces juxtaposed without inserts or slots between them. The plates or cylinders can be roughened by controlled shot blasting to provide a plurality of randomly arranged surface discontinuities that define a plurality of unoriented flow passages when the plates or cylinders are placed in contacting, face-to-face relationship. Gas flow rates substantially greater than 5 liters per second can be obtained, and the device prevents molten metal flow therethrough when the gas flow has been cut off.
    Type: Grant
    Filed: February 20, 1987
    Date of Patent: July 5, 1988
    Inventors: Arturo Lazcano-Navarro, Gregorio Vargas Gutierrez
  • Patent number: 4754900
    Abstract: A controlled volume of a liquid metal is dispensed from a ceramic capillary tube. A wetted film of the liquid metal is applied to the tip of the tube and the liquid metal is inserted into the interior of the tube. The tube contacts a receiving surface with the wetted film and ultrasonic energy is applied to the tube to dispense a small control volume with extreme precision.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: July 5, 1988
    Assignee: Microelectronics and Computer Technology Corporation
    Inventor: Colin A. MacKay
  • Patent number: 4754951
    Abstract: A tuyere assembly and positioning method comprising mechanically separate or separable inner and outer tubes, the inner tube(s) being removeable and replaceable and the outer tube being extendable into a vessel and held in place by a flared end abutting the wall of a cavity through the vessel wall.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: July 5, 1988
    Assignee: Union Carbide Corporation
    Inventors: Ian F. Masterson, Roger Bridgeman, Steven Bailey
  • Patent number: 4753688
    Abstract: A process is provided for increasing the strength of antimony-lead alloys by specially treating an alloy which contains an effective amount of arsenic in the alloy, the process comprising working the alloy, rapidly heat treating the alloy, which includes quenching, for a period of time sufficient to activate a strengthening mechanism in the alloy. The process is especially useful for the manufacture of battery grids on a continuous production line.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: June 28, 1988
    Assignee: Asarco Incorporated
    Inventor: Michael Myers
  • Patent number: 4752442
    Abstract: A bonding wire for use in semiconductor devices which consists essentially of 0.0003 to 0.01 wt. % of barium and the balance gold, the gold purity of said bonding wire being at least 99.99%. The bonding wire may further contain at least one element selected from the group consisting of 0.0005 to 0.005 wt. % of aluminum, 0.0001 to 0.003 wt. % of calcium, 0.0005 to 0.005 wt. % of silver and 0.0005 to 0.005 wt. % of palladium. The total content of the elements and barium in the bonding wire should not exceed 0.01 wt. % based on the weight of the bonding wire so that the gold purity of the bonding wire is at least 99.99%. The use of the additive elements improve the mechanical strength and wire-bondability, making the bonding wire highly suitable for use in wire bonding of semiconductor elements, especially for high-speed bonding.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: June 21, 1988
    Assignee: Shoei Chemical Inc.
    Inventors: Eiichi Asada, Kazuo Yokoyama, Masahiro Yata, Kenichi Hirano
  • Patent number: 4752288
    Abstract: A one-piece sealed disposable enema unit with a lubricated rectal tip is disclosed. The rectal tip of the unit is sealed with a break-off tab. Attached to the tab is a sleeve which covers the exterior of the rectal tip and prevents contamination of the lubricant. Before use, the break-off tab must be twisted off and the tab with the attached sleeve removed. Therefore, the unit is tamper proof and security of the contents is insured.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: June 21, 1988
    Assignee: Aid-Pack, Inc.
    Inventor: Richard P. Hussey
  • Patent number: 4750716
    Abstract: An injection lance is provided for introducing flux mixtures and the like into baths of molten metal, which lance has inner and outer spaced metal tubes with between them a tubular sheath of refractory material that is spaced from both the inner and outer tubes by air gaps. The outer tube may be of high temperature metal with a refractory coating. The tubes can be maintained in coaxial relationship by an end cap at the inlet end of the lance and by rammed ceramic fibre insulation introduced at both ends, the outer tube at the discharge end being chamfered and containing a body of rammed insulation in which the inner tube is buried, with the terminal portion of the flow passage through the lance at the discharge end being provided as a passage formed through the rammed insulation.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: June 14, 1988
    Assignee: Ashland Oil, Inc.
    Inventor: Michael C. Reeve-Parker
  • Patent number: 4751162
    Abstract: A photoengraving article is provided formed of an essentially zinc-free magnesium-based alloy which also contains an amount of calcium effective to control lateral etching and improvement the sharpness of the resultant etched pattern. A method of forming a photoengraved article is also provided. The method comprises the steps of forming a photoengraving article from a photoengraving alloy and etching a pattern on the article in an etching bath. The improvement that comprises forming the photoengraving article from essentially zinc-free magnesium-based alloys containing an amount of calcium effective to control the lateral etching and improve the clarity of the resultant pattern. The article and method do not release zinc into the etching bath. Ultimate release of zinc into the environment is also reduced.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: June 14, 1988
    Assignee: The Dow Chemical Company
    Inventor: Geoffrey S. Newhouse
  • Patent number: 4751050
    Abstract: In composition of an Al-base substrate for magnetic recording media, additional inclusion of at least one of specified amount of Cr, Mg and Zn greatly improves recording and reproducing function of the product.
    Type: Grant
    Filed: November 6, 1986
    Date of Patent: June 14, 1988
    Assignee: Nippon Gakki Seizo Kabushiki Kaisha
    Inventor: Atsushi Toyoda
  • Patent number: 4751049
    Abstract: Connectors which are essentially, by weight, 85% to 93% copper, with silicon in the amount of 1.5% to 2.5% is disclosed. The balance of the material is zinc, desirably in the range of 5% to 12%. Trace elements of tin, lead and aluminum can be tolerated but should be minimized to less than 0.05%. Ideally the material is 81% to 91% copper, 1.75% to 2.4% silicon and the balance zinc of 6% to 10%. The traces may be 0.05% tin, 0.01% lead, and 0.005% aluminum.
    Type: Grant
    Filed: May 6, 1987
    Date of Patent: June 14, 1988
    Inventor: John K. Shannon
  • Patent number: 4747582
    Abstract: Manipulator for guiding of devices for treatment of heats in furnaces, ladles and the like, e.g. lances for injection of oxygen through a door (3) of an electromelting furnace, consisting of a feed table (19), on which one or several devices (24,29) are arranged displaceable mechanically guided in its length direction by means of one or several feed devices, at which the feed table (19) is movable mechanically guided between an advanced position at a work point (14), where the feed table (19) is immediately in front of the furnace door (3) or the like, at which the devices (24,29) can be inserted into the furnace (2) and possibly lowered down into the heat, and a retracted position, where the feed table (19) is removed from the furnace door (3).
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: May 31, 1988
    Inventors: Sven E. Bergstrom, Peter Gossas