Patents Examined by Robert L. McDowell
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Patent number: 4808243Abstract: A zinc cast alloy is disclosed which contains, by weight, 15-60% Al, 0.05-3% Cu, 0.5-7% Si, 0.01-0.8% Mn, optionally 0.005-0.12% P and/or Na, balance Zn and incidental impurities. The alloy has a high damping characteristic, concurrently with good intergranular corrosion resistance and high resistance to both room and elevated temperatures. To achieve values of more than 1.times.10.sup.-3 (internal friction of Q.sup.-1), 20 .mu.m (corrosion depth) or less, 10 kg/mm.sup.2 or more (0.2% yield strength) at room temperature, and 20 kg/mm.sup.2 or more at elevated temperature of 100.degree. C., the alloy has to be subjected to a solution-heat treatment in the range of 300.degree.-400.degree. C., followed by a rapid cooling, preferably a water quench.Type: GrantFiled: September 16, 1987Date of Patent: February 28, 1989Assignee: Mitsubishi Metal CorporationInventors: Yoshiharu Mae, Akihiko Sakonooka
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Patent number: 4808498Abstract: An aluminum alloy contains at least about 0.01 to 0.2 weight percent gallium, at least about 0.01 to 0.2 weight percent tin, and at least about 0.01 to 0.2 weight percent lead. In another embodiment, the alloy may contain at least about 0.01 to 0.2 weight percent indium in lieu of the tin. The balance of both alloys is aluminum, tolerable levels of trace metals, and impurities. Preferably, the aluminum is present in 99.9% purity. The alloy can be used advantageously as an anode in an aluminum-air battery. The gallium-tin-lead aluminum alloy when used as an anode, is preferably used with a salt water electrolyte. The gallium-indium-lead alloy, when used as an anode is preferably used with a caustic electrolyte. The aluminum base alloy may be used as an anode in a battery assembly, a housing, an anode of the present invention, a cathode, and a support means within the housing to secure the anode and cathode in a relative spaced relationship.Type: GrantFiled: December 21, 1987Date of Patent: February 28, 1989Assignee: Aluminum Company of AmericaInventors: Gary P. Tarcy, Robert M. Mazgaj
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Patent number: 4808372Abstract: An in situ process is provided for producing a composite comprising a refractory material dispersed in a solid matrix. A molten composition comprising a matrix liquid, and at least one refractory carbide-forming component are provided, and a gas is introduced into the molten composition. A reactive component is also provided for reaction with the refractory material-forming component. The refractory material-forming component and reactive component react to form a refractory material dispersed in the matrix liquid, and the liquid composite is cooled to form a solid composite material. In one embodiment, the reactive component is a carbonaceous component in the form of a component of the gas, a solid in the gas or the molten composition, or both. The carbonaceous component is provided for reaction with a refractory carbide-forming component to yield a refractory carbide. In a preferred embodiment, the matrix liquid is molten aluminum and the refractory carbide-forming component is tantalum.Type: GrantFiled: January 23, 1986Date of Patent: February 28, 1989Assignee: Drexel UniversityInventors: Michael J. Koczak, K. Sharvan Kumar
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Patent number: 4808373Abstract: A multiple-substance alloy used as a target in a cathode sputtering apparatus, and having a gold content most preferably in the range of 94-98 percent by weight, is disclosed. The alloy further contains non-gold alloys of aluminum, copper and preferably an element of the group of Co, Ni, Ga, Ti, In, Cd, Sn, Fe and Pd.Type: GrantFiled: October 20, 1986Date of Patent: February 28, 1989Assignee: Leybold-Heraeus GmbHInventors: Dieter Hoffman, Wolf-Dieter Munz, G. A. Hoist Siewert, Horst Dietrich
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Patent number: 4806306Abstract: Noble metal alloys are used to produce attachments that can be cast-on, particularly in dental technology, having a melting range above 1500.degree. C. The alloys comprise about 40-70% platinum, about 10-40% palladium, about 5-20% iridium, about 0.5-10% gold, about 0-13 3% silver and about 0-1% each of ruthenium and rhodium.Type: GrantFiled: March 9, 1988Date of Patent: February 21, 1989Assignee: Degussa AktiengesellschaftInventors: Werner Groll, Rudi Steinke, Harry Schiwiora
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Patent number: 4806308Abstract: An aluminum bearing alloy to which is added 3-20% by weight of tin, 0.2-2% of copper and either 0.2-1.2% of manganese or 0.1-1% of zirconium. Additionally 0.1-5% of lead and/or 1.5-8% of silicon may be added.Type: GrantFiled: October 8, 1987Date of Patent: February 21, 1989Assignee: Taiho Kogyo Co., Ltd.Inventors: Soji Kamiya, Yuji Yokota, Tatsuhiko Fukuoka, Yoshio Kumada
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Patent number: 4806309Abstract: A lead-free solder composition of approximately 90% to 95% by weight tin, approximately 3% to 5% by weight antimony, approximately 1% to 4.5% by weight bismuth, and approximately 0.1% to 0.5% by weight silver.Type: GrantFiled: January 5, 1988Date of Patent: February 21, 1989Assignee: Willard Industries, Inc.Inventor: Stanley Tulman
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Patent number: 4805881Abstract: An internal gas generator in combination with a standard heat treat furnace is provided for producing either an endothermic product gas or a purge gas. The generator includes a reaction tube containing alternating packed beds of a highly active catalyst and inert heat transfer particulates. The reaction tube is surrounded by an elongated tubular heating element which heats the reaction tube, the combination producing an acceptable product gas in a small arrangement suitable for retrofit applications to existing furnaces. A flanged mounting permits the reaction tube to be easily removed for standard replacement in the event of catalyst poisoning and the like.Type: GrantFiled: May 28, 1987Date of Patent: February 21, 1989Assignee: Gas Research InstituteInventors: Thomas J. Schultz, Deane A. Horne, Stephen J. Sikirica, James W. Bender
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Patent number: 4804517Abstract: A yellow dental alloy containing a colored intermetallic compound of palladium and indium as 15-85% by weight of the alloy and at least 10% by weight of silver and as desired gold 0-30%, copper 0-45% and silver 10-50%. This alloy exhibits a pale yellow gold color which it derives from the interaction of two white colored metals--palladium and indium. Various alloying additions are specified to improve castability, ductility, strength, hardness, tarnish and corrosion resistance.Type: GrantFiled: April 22, 1987Date of Patent: February 14, 1989Assignee: Williams Dental Company, Inc.Inventors: Stephen P. Schaffer, Clyde E. Ingersoll
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Patent number: 4804168Abstract: An apparatus for treating a molten metal comprises a vertical post, a treating container disposed at one side of the post and having an opening at its upper end for containing the molten metal, a horizontal suspending arm mounted at its base end on the post upwardly and downwardly movably and rotatable in a horizontal plane, a vertical rotary shaft suspended from the arm and having a treating gas channel internally extending therethrough longitudinally, a bubble releasing-dispersing rotor provided at the lower end of the rotary shaft and having in its bottom surface a treating gas outlet in communication with the gas channel, the rotor being movable into and out of the container through the opening, and at least one baffle suspended from the arm and movable into and out of the container through the opening for preventing eddying and waving.Type: GrantFiled: March 4, 1987Date of Patent: February 14, 1989Assignee: Showa Aluminum CorporationInventors: Ryotatsu Otsuka, Shigemi Tanimoto, Kazuo Toyoda
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Patent number: 4802933Abstract: A nickel-palladium-based brazing alloy is disclosed having a composition consisting essentially of about 38 to about 55 atom percent palladium, about 19 to about 34.5 atom percent iron, about 11 to about 20 atom percent silicon, the balance being essentially nickel and incidential impurities. These alloys are especially suited for use as brazing filler metals in joining stainless steels and/or superalloys at temperatures above about 1000.degree. C. A process for brazing honeycomb structures formed at least in part from stainless steels and/or superalloys is also disclosed.Type: GrantFiled: April 21, 1988Date of Patent: February 7, 1989Assignee: Allied-Signal Inc.Inventor: Anatol Rabinkin
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Patent number: 4802655Abstract: For injecting substances into a liquid e.g. molten metal, a nozzle block is mounted in the wall of a vessel containing the liquid. Initially, an injection passage extending through the block is closed by a plug to prevent ingress of liquid, and only when injection is to commence is the plug thrust aside by a delivery pipe movable in the passage, the pipe forming part of an injection lance assembly. The positions of the lance assembly before and after injection are determined by a safety stop arrangement for example comprising a detent in the form of a spring-loaded plunger housed in a fixed part of the apparatus; the plunger coacts with front and rear ramps of an abutment which is fast with part of the lance assembly, to govern the positions of the lance assembly before and after injection.Type: GrantFiled: February 15, 1988Date of Patent: February 7, 1989Assignee: Injectall LimitedInventor: Kenneth W. Bates
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Patent number: 4799973Abstract: The present invention relates to a process for maintaining the fine grain size of and providing excellent bend formability, hot ductility and strength properties to a copper-nickel-manganese alloy to be exposed to elevated temperatures. The process of the present invention includes a final cold working step during which the material to be fabricated into a desired article and/or exposed to the elevated temperatures has its thickness reduced by about 4% to about 30%, preferably from about 5% to about 25%. The alloys described herein have particular utility in brazed articles or assemblies.Type: GrantFiled: April 2, 1984Date of Patent: January 24, 1989Assignee: Olin CorporationInventors: Deepak Mahulikar, Eugene Shapiro
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Patent number: 4799651Abstract: A mechanism and flow conduits for introducing and transporting a set of separated fluids and a stream of solid fines through passageway in a rotating metallurgical converter for introducing such fluids and solid fines into a liquid metal contained in the converter.Stationary conduits from flow sources connect to a non rotative sleeve which forms the external portion of a rotary joint able to introduce a set of separated fluids into the rotating converter passageways. Each separated stationary fluid conduit connects to port holes in the fixed sleeve to lead the flow to the interior of the sleeve, and connects a circumferential channel formed in rotating rings located between a rotating shaft affixed to the converter vessel trunnion pin and the static sleeve with a seal between each adjacent ring and corresponding channel. A port hole is located in each rotating channel ring for leading the fluid through internal flow paths inside and along the axis of the shaft body.Type: GrantFiled: December 26, 1985Date of Patent: January 24, 1989Inventors: Arturo Lazcano-Navarro, Miguel A. Alcantara, Jose E. Hernandez-Ruiz
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Patent number: 4800134Abstract: A plated composite steel strip having a high corrosion resistance comprises a steel strip substrate, a base electroplating layer comprising a Zn or Zn alloy matrix, substantially water-insoluble chromate particles, and additional fine or colloidal particles of SiO.sub.2, TiO.sub.2, Cr.sub.2 O.sub.3, Al.sub.2 O.sub.3, ZrO.sub.2,SnO.sub.2 and/or Sb.sub.2 O.sub.5, and optionally, an additional electroplating layer formed on the base layer and consisting of Zn, Fe, Co, Ni, Mn and/or Cr and/or a surface coating layer containing at least an organic resinous surface layer and formed on the base, or an additional electroplating layer.Type: GrantFiled: December 22, 1987Date of Patent: January 24, 1989Inventors: Teruaki Izaki, Makoto Yoshida, Masami Osawa, Seijun Higuchi, Akinori Maruta
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Patent number: 4799649Abstract: An injection valve which is positioned on the underneath portion of a teeming vessel is disclosed. It may be positioned under a ladle, or under a tundish. The valve itself includes a mounting plate, and a well block nozzle which is in open communication with the metal being teemed in the vessel. Beneath the well block nozzle is a stationary plate, therebeneath a sliding plate which may be imperforate, perforate, or have an opening containing a porous plug or ceramic sieve depending upon the type of injection. Beneath the sliding injection plate a sliding plate carrier is positioned which is engaged by spring loaded rocker arms in order to maintain a compressive relationship between the sliding plate carrier, the sliding injection plate, and the stationary plate. Centrally of the sliding plate carrier is a coupler which, in turn, is connected to a further coupler, an injection hose, and an injection supply for delivering additives to the vessel through the injection valve.Type: GrantFiled: February 17, 1987Date of Patent: January 24, 1989Assignee: Flo-Con Systems, Inc.Inventor: Patrick D. King
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Patent number: 4797328Abstract: Soft-solder alloys for connecting ceramic parts without permetallization comprising 86 to 99% lead or tin, 0 to 13% silver and/or copper, 0 to 10% indium and 1 to 10% titanium and/or zirconium.Type: GrantFiled: February 17, 1987Date of Patent: January 10, 1989Assignee: Degussa AktiengesellschaftInventors: Wolfgang Boehm, Juergen Hausselt, Wolfgang Weise, Willi Malikowsik
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Patent number: 4795682Abstract: Alloys of the type known as overlays for bearings are described. An overlay for a bearing comprises between 0.5 and 15 wt % of cobalt the balance being tin apart from incidental impurities.Type: GrantFiled: July 13, 1987Date of Patent: January 3, 1989Assignee: AE PLCInventors: Michael Turner, John K. Dennis, David R. Eastham
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Patent number: 4795138Abstract: A tuyere is disclosed which is adapted for the injection of gases into a metallurgical vessel. The tuyere includes inner and outer concentric tubes having a radial separation therebetween which defines an annular gap. In use, one gas such as an oxygen mixture flows through the center of the inner tube, and a second normally inert gas flows through the annular gap between the two tubes. In order to provide a closely predetermined and predictable gas flow rate through the annular gap, annular groove is formed in the wall of the outer tube which forms an annular restriction in the gap, and the extent of the restriction may be calibrated so as to provide a closely predetermined gas flow rate therethrough when in use. An annular groove may also be formed in the wall of the inner tube to provide a predetermined restriction in the gas flowing through the inner tube.Type: GrantFiled: November 18, 1987Date of Patent: January 3, 1989Assignee: L-TEC CompanyInventors: Ronald E. Fuhrhop, Allan R. Wandelt
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Patent number: 4792126Abstract: A blow lance for treating molten metal comprising a concentric metal pipe structure enclosed within a ceramic covering with a space defined between the pipe structure and the covering. A layer of heat-resistant elastic fibrous material, excluding a binder, is positioned in the space. Ducting means forming coolant ducts are located between the concentric pipes.Type: GrantFiled: March 12, 1987Date of Patent: December 20, 1988Assignee: Vasipari Kutato es Fejleszto VallalatInventors: Gabor Nagy, Zoltan Szonyi, Lajos Mityok, Istvan Pragay, Jozsef Zambo