Patents Assigned to Nippon Kinzoku Co., Ltd.
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Patent number: 6444056Abstract: A process for producing a refined magnesium material which is flame retardant by adding an alkaline earth metal. In the process, the dross in a thin film is formed on the surface of the molten magnesium material by contacting it with a dross-formable atmosphere gas while the molten magnesium material is subjected to a vertical vortex flow. The dross encloses the impurity floating on the surface of molten magnesium material through the vortex flow in a vertical direction. The resultant dross is accumulated at the corner of the crucible to prevent the re-diffusion of the impurity. The continuous application of the vortex flow against the molten magnesium material causes the thin film of dross to be continuously formed on the molten magnesium material and adhered thereto so as to enclose the impurity each time it is formed. Accordingly, the molten magnesium material is improved in cleanliness or refined.Type: GrantFiled: September 23, 1996Date of Patent: September 3, 2002Assignee: Nippon Kinzoku Co., Ltd.Inventors: Tadayoshi Nakamura, Kazumi Tanaka
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Patent number: 5613999Abstract: A process for producing a refined magnesium material which is flame resistant by adding an alkaline earth metal. In the process, the dross in a thin film is formed on the surface of the molten magnesium material by contacting it with a dross-formable atmosphere gas while the molten magnesium material is subjected to a vertical vortex flow. The dross encloses or wraps the impurity floating on the surface of molten magnesium material through the vortex flow in a vertical direction. The resultant dross is accumulated at the corner of the crucible to prevent the re-diffusion of the impurity. The continuous application of the vortex flow to the molten magnesium material causes the thin film of dross to be continuously formed on the molten magnesium material and adhered thereto so as to enclose or wraps the impurity each time it is formed. Accordingly, the molten magnesium material is improved in purity.Type: GrantFiled: July 11, 1994Date of Patent: March 25, 1997Assignee: Nippon Kinzoku Co., Ltd.Inventors: Tadayoshi Nakamura, Kazumi Tanaka
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Patent number: 5403558Abstract: A metallic carrier composed of an end face portion formed in at least one of the axial end portions of a honeycomb body and an outer circumferential reinforcing layer in which foils in a range from the outermost layer to a quarter of the total number of layers are joined together in the axial intermediate portion. Thus, the metallic carrier is flexible in expansion and shrinkage. Further, the honeycomb body and a jacket are joined to each other mainly at the outer circumference of the outer circumferential reinforcing layer of the honeycomb body, to reduce thermal stress developed between the honeycomb body and jacket while maintaining the strength against a high temperature, to thereby prevent the metallic carrier from being ruptured.Type: GrantFiled: July 6, 1993Date of Patent: April 4, 1995Assignees: Nippon Steel Corporation, Toyota Jidosha Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.Inventors: Takuo Kono, Mikio Yamanaka, Takashi Tanaka, Yasushi Ishikawa, Yutaka Sadano, Masao Yashiro, Tatuo Sugiura, Tadanobu Komai, Shinichi Matsumoto, Toshihiro Takada, Shinji Shibata, Hikaru Aoyagi, Masaaki Ohashi, Yoshio Nishizawa, Akihiko Kasahara
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Patent number: 5082167Abstract: When soldering a honeycomb body formed by alternately piling flat foils (plates) and corrugated foils (plates), a binder liquid is sucked up from the end face of the honeycomb body to form a binder streak in a space defined by contacting portions of the flat foil (plate) and corrugated foil (plate), a solder is scattered and applied onto the binder streak, and the honeycomb body is then dried and heated to effect a soldering of the honeycomb body. According to this method, soldering can be accomplished only in the vicinity of the contacting portions of the flat foil (plate) and corrugated foil (plate), with a desired soldering structure.Type: GrantFiled: September 17, 1990Date of Patent: January 21, 1992Assignees: Nippon Steel Corporation, Toyota Jidosha Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.Inventors: Yutaka Sadano, Yuuji Nakashima, Takashi Tanaka, Takatoshi Kawasaki, Shinji Shibata, Hikaru Aoyagi, Yoshio Nishizawa, Akihiko Kasahara
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Patent number: 5045404Abstract: A heat-resistant stainless steel foil for a catalyst-carrier of combustion exhaust gas purifiers, consisting essentially in weight percentage of:more than 0.06 up to 0.15 of Ln, the Ln being a mixture of La, Ce, Pr and Nd;from 8x(%Ln+0.015) /45 to 0.1 of P;from 4.5 to 6.5 of Al;from 13 to 25 of Cr;not more than 0.025 of C;not more than 0.02 of N;not more than 0.03 of C+N; andthe balance consisting of Fe and unavoidable impurities.Type: GrantFiled: September 26, 1990Date of Patent: September 3, 1991Assignees: Nippon Steel Corporation, Toyota Jidosha Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.Inventors: Keiichi Ohmura, Miko Yamanaka, Fumio Fudanoki, Masayuki Tendoh, Kenji Hirashima, Masaaki Kobayashi, Shinji Shibata, Tomoyuki Sugino, Toshihiro Takada, Yoshio Nishizawa, Akihiko Kasahara
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Patent number: 4918042Abstract: An exhaust gas purifying catalyst of this invention comprises a heat resistance stainless steel catalyst support, an oxide film containing zirconium oxide formed on the heat resistance stainless steel catalyst support, an activated alumina catalyst carrier layer formed on the oxide film, and at least one metal catalyst loaded in the activated alumina catalyst carrier layer. Thus, the activated alumina catalyst carrier layer's come-off from the catalyst support and the oxidation of the catalyst support are suppressed at the same time, and the conversions of the hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NOx) are also improved.Type: GrantFiled: July 8, 1988Date of Patent: April 17, 1990Assignees: Toyota Jidosha Kabushiki Kaisha, Nippon Steel Corporation, Nippon Kinzoku Co., Ltd.Inventors: Toshihiro Takada, Shinichi Matsumoto, Hikaru Aoyagi, Mikio Yamanaka, Keiichi Ohmura, Toshiyuki Yashiro
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Patent number: 4870046Abstract: A rolled high Al stainless steel foil for use as a substrate for a catalyst carrier, which comprises more than 12 wt % up to 20 wt % of Al, from 5 to 25 wt % of Cr, from 0.05 to 2 wt %, in total, of at least one element selected from the group consisting of Ti, Nb, Zr, and Hf, and the remainder substantially consisting of Fe and unavoidable elements. The stainless steel foil has an excellent resistance to oxidation in an engine exhaust gas at a temperature of 1150.degree. C. or higher, can be obtained by foil-rolling, and enables a reduction of the exhaust back-pressure and weight of automobile catalyst converters.Type: GrantFiled: April 21, 1988Date of Patent: September 26, 1989Assignees: Nippon Steel Corporation, Toyota Jidosha Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.Inventors: Mikio Yamanaka, Keiichi Ohmura, Shinichi Matsumoto, Shinji Shibata, Toshiyuki Yashiro, Akihiko Kasahara
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Patent number: 4867811Abstract: A process for producing a metallic catalyst-carrier, comprising the steps of: preparing a steel sheet containing 9.0 to 25.0 wt % Cr and 0.01 to 6.0 wt % Al, plating the steel sheet with Ni at an amount of from 0.3 to 10.0 g/m.sup.2, then plating with Al or Al-alloy at a plated amount defined by the formula; ##EQU1## and with a provision that the thickness of an Al-Fe alloyed layer is controlled to a thickness of 10 .mu.m or less, cold rolling to a rolled thickness of 0.1 mm or less, working to a body of a required form, and heat-treating the body.Type: GrantFiled: July 27, 1988Date of Patent: September 19, 1989Assignees: Nippon Steel Corporation, Toyota Jidosha Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.Inventors: Hiroo Wakiyama, Hisashi Baba, Mikio Yamanaka, Keiichi Ohmura, Shinichi Matsumoto, Toshihiro Takada, Shigetoshi Sugimoto, Shinzi Shibata, Toshiyuki Yashiro, Akihiko Kasahara
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Patent number: 4752599Abstract: In a carrier for a catalyst for purifying exhaust gas, a honeycomb is formed by coiling a corrugated sheet and a flat sheet together, and is mounted in an outer cylinder. An Al (alloy)-clad foil or hot-dip Al (alloy) galvanized foil is used to form the honeycomb, which is heat treated in a vacuum or a reducing atmosphere to simultaneously bond the corrugated sheet and flat sheet together and also bond the honeycomb to the outer cylinder, and to diffuse Al into the foil.Type: GrantFiled: March 27, 1987Date of Patent: June 21, 1988Assignees: Nippon Steel Corporation, Nippon Kinzoku Co., Ltd.Inventors: Yasushi Nakamura, Mikio Yamanaka, Keiichi Ohmura, Motohiko Arakawa, Toshiyuki Yashiro, Masaki Izumi
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Patent number: 4647305Abstract: A process for manufacturing amorphous alloy powders is provided, wherein, a high-speed fluid jet is blown against a flowing melt of an alloy which can be formed into amorphous powders, thereby powerizing the melt and rapidly cooling and solidifying the melt. Use is made of an action tube in which pressure is reduced and turbulent flow is caused so as to increase the cooling rate of the powderized alloy and to form particles of irregular shape. Further, the powderized alloy particles are forced to forcibly collide against a block to increase the cooling rate of the alloy and to form particles of irregular shape.Type: GrantFiled: July 12, 1984Date of Patent: March 3, 1987Assignee: Nippon Kinzoku Co., Ltd.Inventors: Ko Kumai, Tatsuhiko Noda, Tadashi Ichiyama, Takashi Satoh
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Patent number: 4555832Abstract: Disclosed herein is a buckle assembly suitable for use in a vehicle seat belt. The buckle assembly includes a clinched anchor block fixed on a wire and having an interlocking portion projecting downwardly therefrom, a buckle base having a bottom wall defining a matching interlocking portion, which is in engagement with the interlocking portion of the anchor block, and a pair of side walls extending downwardly from the bottom wall. The anchor block is connected directly to both of the side walls of the buckle base. The interlocking portion of the anchor block is press-fit in the matching interlocking portion in the bottom wall of the buckle base. The clinch force of the anchor block against the wire is thus not reduced by the fixing work of the anchor block to the buckle base.Type: GrantFiled: June 2, 1983Date of Patent: December 3, 1985Assignees: NSK-Warner K.K., Nippon Kinzoku Co., Ltd.Inventors: Yasumasa Sano, Tetsuya Ohwada
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Patent number: 4520538Abstract: A buckle assembly which comprises a clinched anchor block fixedly connected to a wire and provided with a first interlocking portion at an upper part and a second interlocking portion at a lower part, a buckle base having at least one bottom wall provided with an interlocking portion which is staked with the second interlocking portion, and a support member held on the buckle base and engageable with the first interlocking portion. Owing to the adoption of the above structure, the buckle assembly according to this invention is generally flat and can withstand relatively great loads.Type: GrantFiled: June 2, 1983Date of Patent: June 4, 1985Assignees: NSK-Warner K.K., Nippon Kinzoku Co., Ltd.Inventors: Yasumasa Sano, Tetsuya Ohwada
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Patent number: 4450604Abstract: A seat belt buckle, in which a locking member is mounted in a channel-shaped base member and a tongue can be inserted between the base member and locking member and locked in engagement with a tongue engaging surface of the locking member, comprising first and second symmetrical guide holes formed in said base member, a slider movably disposed in the base member, a first guide member being movable in said first guide holes and urging said locking member, a second guide member penetrating said second guide holes and movable together with said slider through said second guide holes, a tensile coil spring coupling together said first and second guide members, and a button member for releasing said first guide member from its locking state.Type: GrantFiled: September 22, 1982Date of Patent: May 29, 1984Assignees: Nippon Kinzoku Co., Ltd., NSK Warner Kabushiki KaishaInventor: Tetsuya Oowada
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Patent number: 4427499Abstract: A process for surface treatment of stainless steel sheets for excellent corrosion resistance and gloss is provided according to which a BA film or a passive film is formed on the stainless steel sheet; the sheet is dipped in a treatment solution containing 0.1 to 50% by weight of phosphoric acid, 0.1 to 10.0% by weight of a molybdate, chromic acid or a mixture thereof, and 0.1 to 2.0% by weight of magnesium oxide, sodium silicate or a mixture thereof; and cathodic treatment is carried out under the conditions of 1 to 600 A.sec/dm.sup.2 integrated electric current density and 0.degree. to 90.degree. C. solution temperature.Type: GrantFiled: July 29, 1981Date of Patent: January 24, 1984Assignee: Nippon Kinzoku Co., Ltd.Inventors: Tomoge Hitomi, Takehisa Konishi, Tetsutaro Ogushi, Kazuaki Hatakeyama
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Patent number: 4370210Abstract: In continuously forming color display layer on the surface of the stainless steel strip, potential difference between the strip immersed in the oxidizing solution and a reference electrode is utilized for controlling the thickness, or color tone, of the color display layer, namely, the relationship between the thickness of the color display layer and the potential difference mentioned above is measured first, followed by continuously immersing a strip of the same kind in the oxidizing solution for forming a color display layer on the surface of the strip. The difference in thickness between the actually formed color display layer and a desired color display layer is converted into the difference in potential difference based on the above-noted relationship and the immersion time of the strip in the oxidizing solution is controlled on the basis of said difference in potential difference.Type: GrantFiled: March 10, 1981Date of Patent: January 25, 1983Assignee: Nippon Kinzoku Co., Ltd.Inventors: Tsuyoshi Yoshihara, Nobuaki Ohashi
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Patent number: 4272749Abstract: A reactor formed by winding a conductor on a core which is formed by using mutually insulated particles of iron powder to provide a closed magnetic path. The reactor is less in leakage flux and has its inductance value accurately held over a wide frequency range.Type: GrantFiled: August 30, 1979Date of Patent: June 9, 1981Assignee: Nippon Kinzoku Co., Ltd.Inventor: Toshihiko Tuji
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Patent number: 4265679Abstract: Stainless steels for springs having a high strength and an excellent fatigue resistance are produced by heat treating austenitic stainless steels having such a composition that austenite stability index, Md.sub.30. is 0.degree. C. to +80.degree. C. at a final annealing temperature of 750.degree.-1,150.degree. C., subjecting the thus treated steels to a primary working at a temperature from Md.sub.30 to 500.degree. C. at a reduction rate of not less than 20% and then subjecting said steels to a secondary working at a temperature lower than Md.sub.30 at a reduction rate of not less than 30%.Type: GrantFiled: August 23, 1979Date of Patent: May 5, 1981Assignees: Kawasaki Steel Corporation, Nippon Kinzoku Co., Ltd.Inventors: Nobuo Ohashi, Yutaka Ono, Kiyohiko Nohara, Junichi Shimomura, Tetsuo Miyawaki
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Patent number: 4253620Abstract: There is provided a winding spring for a seat belt winding apparatus which comprises an output drum and a take-up drum. The winding spring is stretched in the S-shaped form between the output drum and take-up drum. In the normal use region of the entire length of the winding spring, the natural radius of curvature of the spring is gradually increased. In the surplus use region of the spring, the natural radius of curvature of the spring is divided into a part where it is gradually decreased and a part where it is kept constant. The natural radius of curvature in the free end portion of the winding spring is increased.Type: GrantFiled: September 26, 1979Date of Patent: March 3, 1981Assignees: Nippon Kinzoku Co., Ltd., NSK Warner Kabushiki KaishaInventors: Mitsuo Takei, Toshiyuki Yashiro, Noboru Owatari, Kazuo Takagi
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Patent number: 4236200Abstract: A semiconductor circuit comprising a reactor including a closed magnetic path core of a compression molding which is formed of a mixture of an insulating material and particles of magnetic substance and a conductor magnetically interlinking to the core, and a semiconductor element connected in series with the reactor.Type: GrantFiled: August 30, 1978Date of Patent: November 25, 1980Assignees: Tokyo Shibaura Denki Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.Inventors: Koji Imai, Sumio Kobayashi, Ko Kumai, Toshihiko Tsuji
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Patent number: RE35063Abstract: When soldering a honeycomb body formed by alternately piling flat foils (plates) and corrugated foils (plates), a binder liquid is sucked up from the end face of tile honeycomb body to form a binder streak in a space defined by contacting portions of the flat foil (plate) and corrugated foil (plate), a solder is scattered and applied onto the binder streak, and the honeycomb body is then dried and heated to effect a soldering of the honeycomb body. According to this method, soldering can be accomplished only in the vicinity of the contacting portions of the flat foil (plate) and corrugated foil (plate), with a desired soldering structure.Type: GrantFiled: January 21, 1994Date of Patent: October 17, 1995Assignees: Nippon Steel Corporation, Toyota Jidosha Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.Inventors: Yutaka Sadano, Yuuji Nakashima, Takashi Tanaka, Takatoshi Kawasaki, Shinji Shibata, Hikaru Aoyagi, Yoshio Nishizawa, Akihiko Kasahara