Patents Examined by Robert McDowell
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Patent number: 4899992Abstract: For injecting gas into a liquid, more particularly a molten metal, a nozzle body (24) is installed in the wall of a liquid containment vessel, the body (24) having a nozzle passage (25) therethrough. Liquid and gas tightly fitted in a downstream end of the passage is solid, gas porous plug (18) having capillary gas passage (20). Upstream of the plug (18) the passage has a gas-porous and liquid-impermeable cartridge (10) closely fitted therein which prevents liquid which may conceivably pass through the plug (18) from leaking out of the passage (25). The cartridge (10) has a gas impermeable metal sleeve (11) containing a particulate material (16) such as sand which is retained in the sleeve (11) by wads (14, 15) of fibrous material at the ends of the sleeve.Type: GrantFiled: September 20, 1988Date of Patent: February 13, 1990Assignee: Injectall LimitedInventors: Anthony Thrower, John R. Gelsthorpe
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Patent number: 4898369Abstract: Apparatus for introducing stirring and refining agents into molten metal in a vessel using a lance having a refractory body and a tube extending inwardly of a first end of the refractory body and terminating inwardly of a second end thereof. A plurality of relatively smaller tubes positioned within the refractory body and communicating with said tube and extending therefrom to the exterior of said refractory body, at least a portion of each of said smaller tubes being formed in a narrow slot-like passageway whereby gas, such as argon, introduced through the tubes and delivered to the exterior of the refractory body will bubble upwardly through the molten metal in a stirring and mixing action including an annular column around the refractory body acting to protect the same from rapid erosion.Type: GrantFiled: April 26, 1989Date of Patent: February 6, 1990Assignee: Insul Company, Inc.Inventor: Joseph A. Perri
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Patent number: 4898791Abstract: In a solderable layer system in which a conductor layer which is partially covered with a layer of solder is applied to a support, the solder layer consists of an alloy in which a reducing agent is contained. The alloy is preferably brass.Type: GrantFiled: February 5, 1988Date of Patent: February 6, 1990Assignee: VDO Adolf Schindling AGInventor: Dieter Schurig
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Patent number: 4898368Abstract: A tuyere having improved wear resistance at the tip, and a refractory walled metallurgical vessel incorporating the tuyere, characterized by an oxide thermal barrier coating on the outer surface of the outermost conduit of the tuyere having a thermal conductivity less than that of the refractory.Type: GrantFiled: August 26, 1988Date of Patent: February 6, 1990Assignee: Union Carbide CorporationInventors: Paul J. Schaffer, Robert C. Tucker, Jr.
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Patent number: 4897317Abstract: A plated steel strip having an enhanced corrosion and rust resistance and an improved paint-coating property comprises a principal plating layer formed on a steel strip substrate and comprising a co-deposited zinc-chromium based alloy which comprises more than 5% by weight but not more than 40% by weight of chromium and the balance of zinc.Type: GrantFiled: March 29, 1988Date of Patent: January 30, 1990Assignee: Nippon Steel CorporationInventors: Tatsuya Kanamaru, Motohiro Nakayama, Katutoshi Arai, Shinichi Suzuki, Ryoichi Naka
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Patent number: 4893791Abstract: An automatic lance changeover device is presented wherein a radially guided ring is axially vertically displaceable by two lifting spindle systems provided on each side of the ring and bears pivotable hooks for receiving the lance and for pressing the latter axially against a sealing surface on the coupling head. The hooks are connected to the stationary coupling head via pivotable connecting rods whose length is alterable, these connecting rods being eccentrically articulated on the support pin of the hooks with the bearing bore at the coupling head end of the connecting rods having a larger diameter than the associated wrist pin. When the ring is axially displaced, the hooks, which have swung out, in a first phase, initially surround the supporting pins on the upper part of the lance as the ring is displaced further, the hooks, without executing any further pivoting movement, pull the lance head into sealing contact with the coupling head.Type: GrantFiled: September 7, 1988Date of Patent: January 16, 1990Assignee: Paul Wurth S.A.Inventors: Hubert Stomp, Carlo Heintz, Andre Kremer, Jean Monai, Daniel Fries, Serge Devillet
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Patent number: 4892235Abstract: A shroud or submerged pour tube which has a sealing cup of an essentially frustoconical configuration at its upper end is disclosed. The sealing cup matingly engages a bullet-shaped nose on the lower portion of the collector nozzle extending downwardly from the valve. The combination of the collector nozzle and the shroud and the joint are held in compressive and oriented relationship by a shroud support assembly. The shroud support assembly has adjustable length arms to permit tilting the shroud axis for alignment at the lower end of the shroud. This urges a line contact at the joint at the upper end of the shroud where it engages the bullet nose of the collector nozzle. The support assembly also may be mounted with flexibility for moving on the XY axis where the Z axis is the axis of the pour tube or shroud in those two plate situations where the collector nozzle shifts laterally during the on and off condition and also during throttling.Type: GrantFiled: June 23, 1988Date of Patent: January 9, 1990Assignee: Flo-Con Systems, Inc.Inventor: Patrick D. King
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Patent number: 4891274Abstract: A hot-dip aluminium coated steel sheet having excellent corrosion resistance and heat resistance, comprising a steel substrate containing 3 to 18% chromium, not more than 0.02% carbon, 0.1 to 1.5% manganese, 0.005 to 0.08% aluminium, not more than 0.1% silicon, with the balance being iron and unavoidable impurities, and aluminium coating on said sheet substrate. The coated sheet may further comprises a coating layer of nickel or nickel-iron alloy (Ni: 1 to 99%) beneath the aluminium coating, or an Al-Fe-Si-Ni-Cr alloy coating layer of 1 to 10.mu. in thickness and containing 0.05 to 5% nickel, 0.2 to 10% chromium, beneath the aluminium coating.Type: GrantFiled: November 7, 1986Date of Patent: January 2, 1990Assignee: Nippon Steel CorporationInventors: Seijun Higuchi, Kenichi Asakawa, Takayuki Ohmori, Koji Umeno, Nobuyoshi Okada, Minoru Fujinaga, Fumio Yamamoto, Katsuhiko Yabe
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Patent number: 4891184Abstract: Low density, high temperature and aluminum-rich intermetallic alloys displaying excellent elevated temperature properties, including oxidation resistance, are disclosed. Based on the aluminum/titanium system, specifically modifications of Al.sub.3 Ti compositions, useful alloys are derived from changes in crystal structure and properties effected by selected-site substitution alloying with manganese, or chromium, and, where used, vanadium, or equivalent alloying elements.Type: GrantFiled: December 23, 1988Date of Patent: January 2, 1990Inventor: Donald E. Mikkola
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Patent number: 4890820Abstract: A method for heating a metallic strand 16 such as a wire or strip comprises passing the strand 16 along a metallic tube 4 which is filled with molten metal 13, the tube wall being heated by a furnace chamber 3 through which the tube 4 extends.Type: GrantFiled: May 15, 1989Date of Patent: January 2, 1990Assignee: British Gas plcInventor: Robert J. Tucker
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Patent number: 4891276Abstract: An article of jewelry of platinum and fine gold of the type wherein the two metals are connected to one another by applying the fine gold in the solid state on the platinum and heating the fine gold to its melting temperature. The article of jewelry includes area portions of thin sheets of fine gold and reinforcements of platinum bordering the area portions of fine gold.Type: GrantFiled: October 24, 1984Date of Patent: January 2, 1990Inventor: Ursula Exner
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Patent number: 4889775Abstract: The present invention relates to a highly corrosion resistant surface-treated steel plate. The steel plate of the invention comprises a zinc deposition or zinc alloy deposition film as the undercoat deposition layer, a chromate film formed on the undercoat deposition layer and a film of a resin composition formed on the chromate film. This resin composition comprises a substrate resin formed by adding at least one basic nitogen atom and at least two primary hydrogen groups to terminal of an epoxy resin, silica and sparingly water soluble Cr compound. The resin composition may comprise a polyisocyanate compound as the curing agent. Moreover, the resin composition may comprise a silane compound as the crosslinking agent for the substrate resin and silica.Type: GrantFiled: February 25, 1988Date of Patent: December 26, 1989Assignees: Nippon Kokan Kabushiki Kaisha, Kansai Paint Co., Ltd.Inventors: Takeshi Adaniya, Masaaki Yamashita, Takahiro Kubota, Akira Enatsu, Norio Nikaido, Yoshiaki Miyosawa, Tadashi Nishimoto
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Patent number: 4889170Abstract: Herein disclosed are a high-strength Ti alloy material having improved workability which contains 2-5% Al, 5-12% V and 0.5-8% Mo (the percents being on a weight basis) and which satisfies the relation: 14%.ltoreq.1.5.times.(V content)+(Mo content).ltoreq.21%, with the balance being Ti and incidental impurities, and a process for producing such high -strength Ti alloy material.The process comprises: preparing a Ti alloy ingot having the above specified composition; hot working the ingot at a temperature wihtin the range of 600.degree.-950.degree. C.; subjecting the work to solid solution treatment at a temperature in the range of 700.degree.-800.degree. C.; and age-hardening the work at a temperatrue between 300.degree. and 600.degree. C. The reesulting Ti alloy material is suitable for use in the fabrication of parts of aircraft where high specific strength and heat resistance are required.Type: GrantFiled: June 13, 1986Date of Patent: December 26, 1989Assignee: Mitsubishi Kinzoku Kabushiki KaishaInventors: Yoshiharu Mae, Tsutomu Oka, Atsushi Hirano
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Patent number: 4888067Abstract: A flux for brazing is prepared from 31.5% to 56.2% of KF and 68.5% to 43.8% of at least one of .UPSILON.-AlF.sub.3 and finely divided .beta.-AlF.sub.3. The KF is dissolved in water, and the AlF.sub.3 is then placed into the resulting KF aqueous solution to react the KF with the AlF.sub.3. The reaction product is dried.Type: GrantFiled: June 7, 1988Date of Patent: December 19, 1989Assignee: Showa Aluminum CorporationInventors: Shoichi Sato, Yasuhiro Osame, Seiji Tazaki
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Patent number: 4887800Abstract: A tuyere for a blast furnace comprises water-cooled tuyere; and a burner removably mounted inside the water-cooled tuyere to burning pulverize coal. The burner comprises an inner pipe, an intermediate pipe and an outer pipe which are concentrically arranged. The inside of the inner pipe is used for a pulverized coal path, an oxygen feed path being in between the inner pipe and the intermediate pipe and a flame temperature control gas feed path in between the intermediate pipe and the outer pipe. The burner is equipped with a water-cooled jacket outside of the top end of the burner.Type: GrantFiled: December 28, 1987Date of Patent: December 19, 1989Assignee: Nippon Kokan Kabushiki KaishaInventors: Hirohisa Hotta, Yotaro Ono, Masahiro Matsuura
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Patent number: 4886557Abstract: The invention relates to a magnesium alloy particularly useful for squeeze casting containing 10 to 25% zinc, 0.5 to 5% copper and 0.25 to 4% silicon, the balance being magnesium and aluminum being substantially absent from the alloy. Additions may include up to 1% calcium with a preferred 0.3% calcium, and 0.002 to 0.005% beryllium. The preferred composition is 12% zinc, 1% copper, 1% silicon, balance magnesium, although 0.3% calcium is a preferred addition to this alloy.The alloy is particularly useful for squeeze casting of automotive and aerospace components.Type: GrantFiled: May 10, 1988Date of Patent: December 12, 1989Inventor: Geoffrey A. Chadwick
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Patent number: 4884787Abstract: A refractory, ceramic, shaped member or nozzle. The shaped member is provided with a passage, preferably in the center. To prevent molten material that might penetrate the passage from penetrating therethrough and solidifying at such a later point, a cooling device may be provided in the passage.Type: GrantFiled: May 24, 1988Date of Patent: December 5, 1989Assignee: Radex Deutschland Aktiengesellschaft fur feuerfeste ErzeugnisseInventors: Dotsch Lorenz, Karl-Heinz Hofer, Jean-Louis Retrayt, Bernd Kull
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Patent number: 4885215Abstract: An exterior stainless steel sheet is provided comprising a stainless steel substrate and a coating layer formed on one surface of the steel substrate from Al, Al alloy, Zn or Zn alloy to a thickness of 0.1 to 70 .mu.m, preferably 1 to 70 .mu.m. A Zn or Zn-Ni alloy plated stainless steel strip is prepared by degreasing a stainless steel strip, substantially activating the surface of the strip, and electroplating the strip in a zinc or zinc-nickel alloy plating bath at pH 3.5 or lower. During electroplating of one side, the other side of the strip not to be plated is covered with a protective film. A stainless steel sheet comprising a stainless steel substrate and a coating layer formed on one surface of the steel substrate from Zn or Zn alloy to a thickness of 0.1 to 50 .mu.m, preferably 1 to 50 .mu.m is useful in preparing welded pipes.Type: GrantFiled: September 29, 1987Date of Patent: December 5, 1989Assignee: Kawasaki Steel Corp.Inventors: Keiichi Yoshioka, Kenji Watanabe, Yasushi Kato
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Patent number: 4883259Abstract: An apparatus for coupling a metallurgical ladle to a gas supply is presented wherein gas is used for the treatment of molten metal contained in the ladle. The gas is injected through the bottom of the ladle into the liquid metal. The ladle rests on a support located at a treatment station. The apparatus comprises a base mounted on the bottom of the ladle support in a manner as to be slidable in two directions at right angles to one another against the action of springs. The apparatus is provided with a male connection head which has an axial through passage that communicates with the gas supply. This apparatus also includes a foot fixed on the ladle which is provided with a female connection member for engagement on the connection head when the ladle is placed in its support.Type: GrantFiled: December 15, 1988Date of Patent: November 28, 1989Assignee: Paul Wurth S.A.Inventors: Hubert Stomp, Jean-Pierre Barthel, Albert Feitler, Fred Parasch
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Patent number: 4883745Abstract: A silver-copper-titanium brazing alloy contains a small amount of tin, indium, silicon, aluminum or manganese as a crust inhibiting element.Type: GrantFiled: November 7, 1988Date of Patent: November 28, 1989Assignee: GTE Products CorporationInventor: Howard Mizuhara