Patents Examined by Robert McDowell
  • Patent number: 4946747
    Abstract: Machine elements formed which overcome the problems associated with rolling bearings or rolling drive units, which, apart from load under rolling are simultaneously exposed to frictional load, which leads in particular zones to frictional wear. In order to keep this to a minimum the invention teaches to apply on the effected surfaces of such structural parts a coating of a friction bearing material, which, however, according to the findings of the invention must be applied with the PVD method and must have a thickness of the order of magnitude of the surface roughness of the base body; known thicker friction bearing coatings are not suitable. The invention is especially for forming gear wheels, rolling bearings, shafts, compressor screws, and rolling pistons.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: August 7, 1990
    Assignee: Balzers AG
    Inventors: Erich Bergmann, Manfred Berger
  • Patent number: 4943492
    Abstract: Welded structures composed of aluminium alloy components are protected from white zone and exfoliation corrosion by means of a surface layer applied over the weld bead and consisting of an aluminium alloy containing 0.02 to 0.4% by weight of indium. Other elements which may be present include zinc 0.1 to 1.5%; manganese, 0.02 to 0.5%; tin, 0.12 to 0.50%; gallium, 0 to 0.2%; and magnesium, 0.01 to 6%. The surface coating may be applied by arc or flame spraying or by welding.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: July 24, 1990
    Assignee: Alcan International Limited
    Inventors: Nigel J. H. Holroyd, Geoffrey M. Scamans
  • Patent number: 4941646
    Abstract: An air cooled refractory covered injection lance for introducing reactive gases below the surface of a molten metal bath where the lance is provided with means to surround the reactive gas conduit with a high velocity cooling fluid to prevent thermal decomposition of the reactive gas prior to its injection into the molten metal bath.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: July 17, 1990
    Assignees: Bethlehem Steel Corporation, Air Products & Chemicals, Inc.
    Inventors: Philip D. Stelts, David W. Kern, Kenneth J. Fioravanti
  • Patent number: 4940638
    Abstract: Plated steel sheet for a can comprises: a steel sheet; an Al or Al alloy plated film of 0.005 to 5 .mu.m in thickness on one surface of the steel sheet; and a plated film of 0.005 to 5 .mu.m in thickness on the other surface of the steel sheet, the plated film comprising a metal selected from the group consisting of Ti, Zn, Ni, Co, Cr, Mo and Sn; and furthermore, Plated steel sheet for a can comprises: a steel sheet; a Ti or Ti alloy plated film of 0.005 to 5 .mu.m in thickness on one surface of the steel sheet; and a plated film of 0.005 to 5 .mu.m in thickness on the other surface of the steel sheet, the plated film comprising a metal selected from the group consisting of Al, Zn, Co, Mo and Sn.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: July 10, 1990
    Assignee: NKK Corporation
    Inventors: Takeshi Adaniya, Yoshinori Yomura, Naoyuki Ooniwa, Yoshihiko Yasue, Hiroshi Kagechika, Tadahiko Mishima, Hiroshi Ishikawa
  • Patent number: 4940213
    Abstract: An exhaust processing apparatus comprises a cracking furnace for cracking and solidifying exhaust discharged from a reactor for forming crystals on a semiconductor substrate, a first collecting device for collecting relatively large components solidified in the cracking furnace, a second collecting device for collecting relatively small solidified components passed through the first collecting device, and a chemical or a physical adsorbing member for chemically or physically adsorbing the exhaust passed through the first and second collecting devices.The apparatus may be provided with bypass piping for bypassing a particular section of the apparatus, a shutoff member for opening and closing the bypass piping and a control device for controlling the shutoff member.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: July 10, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshimitsu Ohmine, Takaaki Honda, Keiiti Akagawa
  • Patent number: 4940639
    Abstract: A Zn-Ni alloy electroplated steel sheet exhibiting improved corrosion resistance as well as improved adhesion upon impact and resistance to powdering and a manufacturing process therefor are disclosed. The electroplated steel sheet comprises a steel sheet; a thin Zn-Ni alloy electroplated underlayer on at least one side of the steel sheet in which microcracks having a width of 0.01-0.5 .mu.m and covering 10-60% of the surface area of the electrolplated layer are randomly oriented; and a Zn-Ni alloy electroplated toplayer. The underlayer is prepared by dipping the initially electroplated sheet into an acidic solution containing 20 g/l or more of Ni.sup.2+ and 20 g/l or more of Zn.sup.2+ with a ratio of Ni.sup.2+ /Zn.sup.2+ of 1.0.about.4.0 at a bath temperature of C. for a period of time (T, seconds) of (5.about.20) .times.W (W: weight of electroplated layer in g/m.sup.2) without applying an electric current to form an Ni-rich pretreated underlayer.
    Type: Grant
    Filed: July 6, 1989
    Date of Patent: July 10, 1990
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kazuhide Ohshima, Nobukazu Suzuki
  • Patent number: 4938461
    Abstract: An impervious refractory plug clad in a metal canister, adapted for insertable registration in an opening in a refractory block of a ladle, is provided with an array of narrow peripheral passages formed in the plug's lateral surface to distribute a flow of inert gas into molten metal within the ladle. The passages are defined by slots preformed in the plug's peripheral surface and the inner surface of the tightly fitted canister. An elongated metallic strip is preferably located in each passage to induce solidification of any molten metal which tends to flow against the output ends of the passages.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: July 3, 1990
    Assignee: Zedmark Refractories Corp.
    Inventor: Daniele Bertollo
  • Patent number: 4938922
    Abstract: A brazing alloy in accordance with this invention has the following composition, by weight: 91 to 99% gold, 0.5 to 7% nickel; 0.10 to 2% titanium. Alternatively, with palladium present, the composition is as follows, by weight: 83 to 96% gold; 3 to 10% palladium; 0.5 to 5% nickel; 0.10 to 2% titanium.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: July 3, 1990
    Assignee: GTE Products Corporation
    Inventor: Howard Mizuhara
  • Patent number: 4938923
    Abstract: The gold wire used for the wire bonding of a semiconductor device comprises at least three kinds of elements selected from rare earth elements such as La, Ce and Pr: Be, Ca, Mg, Ag, Fe: and platinum group elements; and the balance of Au at high purity.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: July 3, 1990
    Inventors: Takeshi Kujiraoka, Koichiro Mukoyama, Hiromi Yamamoto, Kenichi Kurihara
  • Patent number: 4938809
    Abstract: A complex part composed of rapidly solidified magnesium base metal alloy is produced by superplastic forming at a temperature ranging from C. to C. and at a rate ranging from 0.00021 m/sec. to 0.00001 m/sec., to improve the formability thereof and allow forming to be conducted at lower temperatures. The rapidly solidified magnesium based alloy has a composition consisting essentially of the formula Mg.sub.bal Al.sub.a Zn.sub.b X.sub.c, wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium and yttrium, "a" range from 0 to about 15 atom percent, "b" ranges from 0 to about 4 atom percent and "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to 15 atom percent. Such an alloy contains fine grain size and finely dispersed magnesium-, aluminum- rare earth intermetallic phases.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: July 3, 1990
    Assignee: Allied-Signal Inc.
    Inventors: Santosh K. Das, Chin-Fong Chang, Derek Raybould
  • Patent number: 4930757
    Abstract: A tuyere for a metallurgical vessel comprising a solid metal tuyere body with a central gas feed bore. The gas feed bore contains at least one gas feed pipe. The tuyere body also has at least one water-cooled bore between the outer wall of the tuyere body and the gas feed bore. A water-cooled bore has a water passage for circulating water therethrough. A water cooling header with separated water inlet and outlet is attached to the tuyere body external to the metallurgical vessel. A water passage is provided for a flow of water from the water inlet through the water passage in the water-cooled bore to the water outlet. The cooling capacity of the tuyere is sufficient to cause the formation of a protective encrustation on the end of the tuyere, and to effectively reduce erosion and chemical reaction of the tuyere material and the vessel wall.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: June 5, 1990
    Assignee: Cominco Ltd.
    Inventors: Robert E. Manwell, Charles A. Sutherland
  • Patent number: 4929420
    Abstract: The invention provides an alloy useful particularly in dentistry.The alloy of the invention in its broadest aspect contains from about 0.05 to about 8% by weight of indium and from about 8 to about 20% by weight of iridium, the balance essentially being platinum. Preferably, however, the allow consists essentially of platinum, iridium and indium, and contains from about 0.05 to about 8% by weight of indium, with the weight ratio of platinum to iridium being from about 84 to about 86:15.The alloy is useful in forming dental prostheses with aluminous porcelain or with a castable ceramic.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: May 29, 1990
    Assignee: The National Research Development Corporation
    Inventor: Peter Cook
  • Patent number: 4929423
    Abstract: A lead-free alloy for joining and sealing which is useful as a plumbing solder comprises from 0.08 to 20% by weight of bismuth, from 0.02 to 1.5% by weight of copper, from 0.01 to 1.5% by weight of silver, from 0 to 0.10 percent by weight of phosphorus, from 0 to 0.20% of a rare earth mixture and the balance tin, together with incidental impurities. The alloy has a similar pasty range (i.e. melting temperature and melting range) to the traditional tin-lead plumbing solders.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: May 29, 1990
    Assignee: Cookson Group plc
    Inventors: Kay L. Tucker, Ulysses Ma
  • Patent number: 4927467
    Abstract: A method for continuous production of thin plate ingot of phosphor bronze by quenching molten metal of bronze, wherein molten metal of phosphor bronze is quenched at a rate of from 10.sup.2 .degree. C./sec. to 10.sup.5 .degree. C./sec. to thereby solidify the same, and then the solidified metal is continuously cooled to a normal temperature to thereby obtain a microstructure having a crystal grain size of 50 .mu.m or below and in which appearance of the dendritic structure and the segregation layer is suppressed.
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: May 22, 1990
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Takaji Kusakawa
    Inventors: Takaji Kusakawa, Katsuyoshi Wakamoto, Mitsuyuki Imaizumi
  • Patent number: 4927788
    Abstract: A monolithic female connector made of a copper-base alloy consisting essentially of 7-15 wt % Ni, 1.0-2.0 wt % Al, no more than 0.0050 wt % 0.sub.2, and the balance of Cu and incidental impurities is highly useful as an electrical connector element of low signal current used in automobiles, because it is made of the alloy having improved bendability while satisfying high electrical conductivity and spring limit.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: May 22, 1990
    Assignees: Dowa Mining Co., Ltd., Yazaki Corporation
    Inventors: Kazutaka Nakashima, Kazuya Saito
  • Patent number: 4925166
    Abstract: In a flushing brick for metallurgical vessels comprising a shaped brick having a gas distributor connected to a gas supply pipe and gas passages the gas passages lead out of a wind box and are surrounded in a gas-tight manner by a protective tube that keeps the outer part of the shaped brick free from the pressure of the flushing gas.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: May 15, 1990
    Assignee: PA-HA-GE Hutten und Giessereibedarf GmbH & Co. KG
    Inventor: Harry Zimmermann
  • Patent number: 4919397
    Abstract: A multiple orifice injection valve having a stationary block which communicates between the vessel and a sliding plate. The sliding plate is provided with at least one injection port and drive means for rotatably indexing the same in and out of register with the various orifices in the stationary block. Both the stationary block and sliding plate may have special wear features. The sliding plate is held by means of a carrier, and the same urged by a plurality of spring-loaded rockers into pressure face-to-face relationhip with the stationary block. The valve can be open by a toggle latch and toggle hinge assembly thereby permitting removal of the sliding plate and/or the stationary block. Injection is provided by a quick disconnect coupling having two injection ports. The one port receives wire or other metallic material in wire form, and the second port injects gas, powdered metals, or other fluid-like materials.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: April 24, 1990
    Assignee: Flo-Con Systems, Inc.
    Inventor: Patrick D. King
  • Patent number: 4920020
    Abstract: A zinc base powder for alkaline batteries consists of 0.05 to 3% of mercury, 0.003 to 0.2% of bismuth, 0.01 to 0.08% of lead, the rest being zinc. This powder has an excellent resistance to corrosion in alkaline medium.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: April 24, 1990
    Assignee: Metallurgie Hoboken-Overpelt
    Inventors: Ivan A. Strauven, Marcel L. Meeus
  • Patent number: 4917728
    Abstract: A method of removing unwanted inclusion particles from a body of liquid aluminium or aluminium alloy by deposition thereof comprising1.(a) adding to the liquid metal at least one alloying constituent in greater quantity than is eventually required and(b) raising the metal temperature higher than the desired casting temperature and above that liquidus of the alloy below which some intermetallic particles can form,2.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: April 17, 1990
    Assignee: Alcan International Limited
    Inventor: Philip G. Enright
  • Patent number: 4916027
    Abstract: A primary multi-layer structural component having insulation properties and the method of producing same is disclosed. The structure is comprised of opposing spaced apart face sheets, a plurality of internal core sheets, the core sheets being spaced apart from each other and from the face sheets. Truss means extend internally across the structure, the truss means being connected to and supporting the opposing face sheets, and being integrally connected to and supporting the core sheets. Such structure is produced by forming a stack of metal sheets in contact with each other, including a pair of outer face sheets and a plurality of core sheets positioned between the face sheets, and providing a predetermined stop-off pattern by placing stop-off material in certain preselected areas between the contacting surfaces of adjacent faces sheets and core sheets, and of adjacent core sheets.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: April 10, 1990
    Assignee: Rockwell International Corporation
    Inventor: Alfred R. DelMundo