Patents Examined by David Schumaker
-
Patent number: 4973369Abstract: The specification discloses an alloy catalyst for oxidation of hydrogen which is prepared by heat treating a material comprising an amorphous alloy represented by the formula: Zr.sub.x Co.sub.(100-x) (wherein 10 atomic %.ltoreq..times..ltoreq.80 atomic %), according to the following three-steps in an oxidizing atomsphere: first heat-treatment step at a temperature at which the foregoing alloy stably exists as an amorphous single phase; second heat-treatment step at a temperature at which the alloy exists as a mixed phase of a metastable phase and an amorphous phase; and third-heat treatment step at a temperature at which the alloy is entirely transformed into a crystalline phase. The alloy catalyst of the present invention is a highly active catalyst for oxidation of hydrogen and exhibits a superior catalytic efficiency especially in catalytic combustion of hydrogen and in deoxidation and dehydrogenation of a gas mixture of hydrogen and oxygen.Type: GrantFiled: May 4, 1990Date of Patent: November 27, 1990Assignees: Yoshida Kogyo K.K., Tsuyoshi MasumotoInventors: Tsuyoshi Masumoto, Akihisa Inoue, Hisamichi Kimura, Hatsuo Hirono, Koichi Moriyama, Hideo Fukui
-
Patent number: 4973522Abstract: A metal matrix composite may be produced by atomizing a stream of molten aluminum-lithium alloy to form a spray of hot metal particles by subjecting the stream to relatively cold gas directed at the stream, applying to the stream or spray fine solid particles of reinforcement e.g. silicon carbide, and depositing the metal having the fine particles incorporated therein. The resulting composite has the following properties in an extruded and age hardened state:0.2% Proof strength - at least 400 MPaTensile strength - at least 440 MPaElongation - at least 2.0%Modulus of elasticity - at least 85 GPaDensity - maximum 2.75 Mg/m.sup.3.Type: GrantFiled: June 2, 1988Date of Patent: November 27, 1990Assignee: Alcan International LimitedInventors: Richard M. Jordan, John White, Treve C. Willis
-
Patent number: 4963439Abstract: A fiber-reinforced metal composite consisting essentially of continuous reinforcing fibers disposed in an aluminum alloy matrix containing about 0.005 wt % of cobalt.Type: GrantFiled: April 17, 1989Date of Patent: October 16, 1990Assignee: Ube Industries, Ltd.Inventors: Tadashi Yamamoto, Michiyuki Suzuki, Yoshiharu Waku, Masahiro Tokuse
-
Patent number: 4950554Abstract: Directed to the production of composite copper-molybdenum sheet by assembling at least one plate of molybdenum with at least one plate of copper to form a composite billet, heating the billet in a protective atmosphere to a temperature within the hot working range for copper, working the billet in a protective atmosphere to effect a reduction in thickness of at least about 40% to bond said copper and said molybdenum together and thereafter further working the resulting bonded billet.Type: GrantFiled: May 30, 1989Date of Patent: August 21, 1990Assignee: AMAX Inc.Inventor: Ronald S. Fusco
-
Patent number: 4948559Abstract: An alloy for building up a valve according to the present invention comprises: with respect to the total weight of the alloy taken as 100%, 30 to 40% by weight of chromium; 15 to 31% by weight of nickel; 7 to 20% by weight of molybdenum; 0.7 to 2.2% by weight of carbon; 1.5% or less by weight of silicon; and balance of iron and inevitable impurities. The alloy is superior in hardness at high temperatures, PbO resistance and PbO+PbSO.sub.4 resistance. In addition, the alloy is suitable for powder buildup welding.Type: GrantFiled: July 26, 1989Date of Patent: August 14, 1990Assignees: Toyota Jidosha Kabushiki Kaisha, Fukuda Metal Foil & Powder Co., Ltd.Inventors: Shinji Oishi, Masahiro Nakagawa, Mototsugu Koyama, Kanichi Tanaka, Syozo Nagai, Kensuke Hidaka
-
Patent number: 4917359Abstract: An easy method and apparatus to eliminate casting defects from composite materials of hypereutectic Al-Si alloys and improve their properties. The product composite materials with primary silicon crystals of several microns have fine honogeneous microstructures and mechanical properties comparable to similar materials produced by the conventional powder metallurgy technology. Highly wear-resistant composite materials, in which the hypereutectic Al-Si alloy and strengthening material are homogeneously mixed, can be obtained with ease. The hypereutectic Al-Si alloy and strengthening material are homogeneously mixed by stirring blades rotated at low speed. The obtained molten composite alloy rotated at high speed about a horizontal shaft in a heat-resistant vessel. The rotor rotating and stirring at high speed spatters the molten composite alloy material to break up the crystallizing out primary silicon crystals.Type: GrantFiled: May 17, 1989Date of Patent: April 17, 1990Assignees: Agency of Industrial Science & Technology, Suzuki Motor Co., Ltd.Inventors: Kiyoshi Ichikawa, Satoshi Ishizuka, Shinji Yamamoto
-
Patent number: 4909985Abstract: Economical, tarnish-resistant precious-metal alloys for dentistry consisting essentially of 36 to 39% silver, 28 to 32.5% gold, 17 to 19.5% palladium, 0 to 0.1% iridium, 9.5 to 10.5% copper, 0.5 to 3% indium and 0.5 to 2.5% zinc, whereby the sum of the indium and zinc contents does not exceed a maximum of 4%.Type: GrantFiled: June 2, 1989Date of Patent: March 20, 1990Assignee: Degussa AktiengesellschaftInventors: Rudolf Kropp, Wolfgang Kuerten
-
Patent number: 4900639Abstract: Leakproof, adhesive, non-lamellar and pore-free antifriction coatings can be produced from essentially oxidation-sensitive dispersion alloys, with at least two metallic alloy components forming a miscibility gap in the solid state, by means of vacuum plasma-spraying with a practically homogeneous material distribution. Precipitation crystallites of alloy components are significantly below 5 .mu.m and fringe-crystal growth is definitely inhibited. By adding hard particles during the coating process further dispersion consolidation can be achieved. Such antifriction coatings improve longevity, corrosion resistance and emergency lubrication of sliding surfaces without reducing their running-in characteristics and their ability to bed in foreign matter. They can be deposited individually on to sliding bearing components or continuously on to supporting strips.Type: GrantFiled: April 22, 1988Date of Patent: February 13, 1990Assignees: 501 Glyco-Metall-Werke Daelen, Loos GmbHInventors: Erich Hodes, Ulrich Engel, Heiko Gruner
-
Patent number: 4897111Abstract: For a process for the manufacture of powders from molten materials by atomizing the melt to particles by means of fluid media and cooling the particles as they fall, a melting chamber (3) is provided which has a melting system (4) disposed in the melting chamber (3) and an atomizing tower (8) is provided which is associated with the atomizing system (9) and attached to the melting chamber (3). For the production of powders of finest particle size with high purity and uniformity, a plurality of nozzles (11, 12, . . .) which can be aimed in their holders at the molten stream, are used for projecting a low-boiling liquefied gas under a pressure of 50 to 700 bar against the molten stream (23) entering the atomizing tower (8).Type: GrantFiled: June 15, 1988Date of Patent: January 30, 1990Assignee: Leybold AktiengesellschaftInventors: Sigurd Jonsson, Michael Hohmann, Gerhard Gross, Hans W. Bergmann
-
Patent number: 4895701Abstract: A gold colored, tarnish and corrosion resistant gold free alloy is disclosed, usable for jewelry, dental purposes and the like. The alloy consists essentially of 24 to 27 percent palladium, 19 to 22 percent indium, 5 to 30 percent copper, and the balance is essentially silver.Type: GrantFiled: January 9, 1989Date of Patent: January 23, 1990Inventor: Daniel Davitz
-
Patent number: 4892579Abstract: A process for preparing a substantially amorphous metal alloy body from substantially crystalline mixed elemental metal powders is disclosed. The process for producing the mixed elemental metal powders comprises the step of (1) entraining vapors of at least a first metal and a second metal, the two metals having a negative heat of mixing when combined, in separate heated inert gas streams; (2) cooling each inert gas stream adiabatically by passing it through a nozzle, to produce elemental metal powder aerosols; (3) mixing the inert gas streams to produce mixed elemental metal powder aerosols; and (4) collecting the mixed elemental metal powder aerosols to form mixed elemental powders. The powders can then be compacted to form a compacted body and the compacted body thermally reacted under reaction conditions sufficient to form the substantially amorphous metal alloy body.Type: GrantFiled: December 16, 1988Date of Patent: January 9, 1990Assignee: The Dow Chemical CompanyInventor: Lowell E. Hazelton
-
Patent number: 4891068Abstract: The present invention provides an additive powder for coating materials or plastics, comprising a particle of a metal or glass, comprised of a particle having a thickness of 0.5 to 5 .mu.m, a minor axis/major axis of from 5 to 500 .mu.m, an aspect ratio (ratio of the major axis to the thickness) of not less than 5, and a ratio of the minor axis to the major axis, of from 1 to 10, and having the shape of a leaf as a whole. This powder can be prepared by melting a metal or glass, bringing the resulting melt to flow out from a nozzle and jetting a gas to the melt to form droplets of the melt, and bringing said droplets, before they solidify, to collide against the surface of a rotating cooling member having the shape of an cone or horn and provided in the direction of the flow of said droplets, followed by cooling to effect solidification.Type: GrantFiled: October 24, 1988Date of Patent: January 2, 1990Assignees: Teikoku Piston Ring Co., Ltd., Tsuyoshi MasumotoInventors: Tsuyoshi Masumoto, Akihisa Inoue, Masahiro Oguchi, Yoshio Harakawa
-
Patent number: 4886547Abstract: The present invention provides a method of efficiently and stably manufacturing a high-purity metal powder of a desired particle size, which is used for powder metallurgy or the like, by generating arc 18 between electrodes 12 and 13 to melt the distal end portions of the electrodes, causing droplets 19 of the molten metal to drop onto rotating disk 14, scattering the dropped droplets by a centrifugal force, thereby cooling the droplets, and an apparatus for the same.Type: GrantFiled: May 16, 1988Date of Patent: December 12, 1989Assignee: Nippon Kokan Kabushiki KaishaInventors: Hideaki Mizukami, Kentaro Mori, Akichika Ozeki, Takaho Kawawa, Yuji Sugitani, Hirokazu Nomura, Tadashi Fujioka, Hirotaka Nakagawa
-
Patent number: 4885032Abstract: Disclosed is a metal particle having a maximum dimension of not more than 1 mm surface-treated with an aqueous solution containing phosphate ions, soluble ions of vanadium and oxygen. This particle can be a metallic pigment having excellent brightness retention and wetting properties to a binder resin.Type: GrantFiled: August 31, 1987Date of Patent: December 5, 1989Assignee: Nippon Paint Co., Ltd.Inventors: Toshihiro Okai, Yoshiaki Okumura, Mitsuyuki Oda, Takashi Yamamoto, Teruaki Kuwajima
-
Patent number: 4883640Abstract: A brazing alloy-filler metal for brazing parts made of TiAlNb alloys has a brazing temperature of about 1020.degree. to 1250.degree. C. and a composition of, in weight percent, 37-75 titanium, 5-43 niobium, 20-58 nickel.Type: GrantFiled: June 17, 1988Date of Patent: November 28, 1989Assignee: GTE Products CorporationInventor: Howard Mizuhara
-
Patent number: 4877577Abstract: A copper alloy material for lead frames for semiconductor devices. The lead frame material consists essentially of:Ni: 0.5-2 percent by weight;Sn: 1.2-2.5 percent by weight;Si: 0.05-0.5 percent by weight;Zn: 0.1-1 percent by weight;Ca: 0.001-0.01 percent by weight;Mg: 0.001-0.05 percent by weight;Pb: 0.001-0.01 percent by weight; andCu and inevitable impurities: the balance.The lead frame material obtained possesses not only high strength, but also excellent thermal-exfoliation resistance of the solder, and also enhances the wear resistance of the stamping dies, while possessing excellent other properties, such as repeated-bending strength, thermal conductivity and electrical conductivity, platability, and solderability, which are required of lead frames.Type: GrantFiled: October 12, 1988Date of Patent: October 31, 1989Assignee: Mitsubishi Shindoh Co., Ltd.Inventors: Rensei Futatsuka, Synu-ichi Chiba, Tadao Sakakibara
-
Patent number: 4877692Abstract: Alumina is bonded to a metal by means of an active brazing filler alloy. When the metal to which the alumina is bonded is a high blushing metal, that is, a metal on which the active brazing filler alloy readily flows on the surface, a thin layer of a low blushing metal is disposed therebetween.Type: GrantFiled: September 12, 1988Date of Patent: October 31, 1989Assignee: GTE Products CorporationInventors: Howard Mizuhara, Eugene Huebel
-
Patent number: 4873149Abstract: The present invention relates to a vibration-damping metal sheet.Conventional vibration-damping metal sheets such as single metal sheets of Mn-Cu base alloys, etc., and sandwich steel sheets having an intermediate plastic material had individually some disadvantages in connection with critical temperatures for use, heat resistance, weldability, conductivity and other properties.In the present invention, metal plates (1) and (2) are joined together through minute inclusions (3) permitted to be substantially uniformly present therebetween and bit thereinto and, optionally, through the diffusion of a portion of the metal plates into which the minute inclusions are bit. At another portion, the metal plates (1) and (2) only come into contact with each other. Metal or ceramic powders, or wiry or network materials may be used as the minute inclusions (3).Type: GrantFiled: March 28, 1988Date of Patent: October 10, 1989Assignee: Nisshin Steel Co., Ltd.Inventors: Kenichi Shinoda, Tomoyoshi Iwao, Tomoaki Isayama, Yuichi Higo
-
Patent number: 4865808Abstract: An easy method and apparatus to eliminate casting defects from composite materials of hypereutectic Al-Si alloys and improve their properties. The product composite materials with primary silicon crystals of several microns have fine homogeneous microstructures and mechanical properties comparable to similar materials produced by the conventional powder metallurgy technology. Highly wear-resistant composite materials, in which the hypereutectic Al-Si alloy and strengthening material are homogeneously mixed, can be obtained with ease. The hypereutectic Al-Si alloy and strengthening material are homogeneously mixed by stirring blades rotated at low speed. The obtained molten composite alloy rotated at high speed about a horizontal shaft in a heat-resistant vessel. The rotor rotating and stirring at high speed spatters the molten composite alloy material to break up the crystallizing out primary silicon crystals.Type: GrantFiled: March 30, 1988Date of Patent: September 12, 1989Assignees: Agency of Industrial Science and Technology, Suzuki Motor Co., Ltd.Inventors: Kiyoshi Ichikawa, Satoshi Ishizuka, Shinji Yamamoto
-
Patent number: 4865809Abstract: A gold colored, tarnish and corrosion resistant copper free allow is disclosed usable for jewelry, dental purposes and the like. The alloy consists essentially of 8 to 20 percent Gold, 22 to 26 percent Indium, 22 to 28 percent Palladium, and the balance is essentially Silver.Type: GrantFiled: September 30, 1988Date of Patent: September 12, 1989Inventor: Daniel Davitz