Patents by Inventor Toshiaki Morichika
Toshiaki Morichika has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5302181Abstract: An oxide-dispersion-strengthened sintered alloy improved in oxidation resistance and compressive strength for use at high temperatures of at least 1350.degree. C. The alloy includes a matrix of a metal consisting substantially or predominantly of Cr, and 0.2 to 2.0% by weight of Y.sub.2 O.sub.3 uniformly dispersed in the matrix. The Y.sub.2 O.sub.3 as uniformly dispersed is up to 0.1 .mu.m in mean particle size.Type: GrantFiled: April 14, 1992Date of Patent: April 12, 1994Assignee: Kubota CorporationInventors: Toshiaki Morichika, Takashi Onishi, Hiroshi Yamamoto, Koichi Yanai, Hiroyuki Araragi
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Patent number: 5082750Abstract: A magnetic recording medium having excellent noise characteristics and comprising a metal magnetic film formed on a nonmagnetic substrate and made of (1) a Co-Cr-Nb alloy, or (2) a Co-Cr-Ni-Nb alloy. The alloys (1) and (2) are represented respectively by the following formulae:Co.sub.1-x-z Cr.sub.x Nb.sub.z (1)Co.sub.1-x-y-z Cr.sub.x Ni.sub.y Nb.sub.z (2)wherein x, y and z each represent an atomic ratio, x is 0.08 to 0.15, y is 0.05 to 0.25 and z is 0.03 to 0.10.Type: GrantFiled: October 20, 1989Date of Patent: January 21, 1992Assignee: Kubota Ltd.Inventors: Toshiaki Morichika, Toshio Tani, Chiaki Sakai, Hideo Koshimoto, Tatsuhiko Kadowaki
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Patent number: 5013616Abstract: A magnetic recording medium having a low noise level and comprising a magnetic film made of a Co-Ni-Cr-P alloy. The Co-Ni-Cr-P alloy has a composition represented by the formula(Co.sub.100-a Ni.sub.a).sub.100-b-c Cr.sub.b P.sub.cwherein a, b and c each represent atomic percent, and 3.ltoreq.a.ltoreq.40, 2.ltoreq.b.ltoreq.10 and 2.ltoreq.c.ltoreq.7.Type: GrantFiled: September 12, 1990Date of Patent: May 7, 1991Assignee: Kubota Ltd.Inventors: Toshiaki Morichika, Toshio Tani, Nobuhiko Tanaka, Tatsuhiko Kadowaki
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Patent number: 4510988Abstract: A reactor tube for thermally cracking or reforming hydrocarbons comprising a tube member made of Fe-Cr-Ni heat resisting material and a covering layer of self-fluxing alloy fusing to the inner surface of the tube member, the covering layer made of heat resisting material free from Ni or with a low Ni content. The tube member is manufactured by centrifugal casting, and the covering layer is formed by applying the self-fluxing alloy powder by scattering with or without thermit agent or spraying the alloy to the inner surface of the tube member.Type: GrantFiled: August 17, 1982Date of Patent: April 16, 1985Assignees: Kubota Ltd., Toyo Engineering CorporationInventors: Keizo Konoki, Takanobu Shinohara, Ikuyoshi Kochi, Keiichi Shibata, Hisakatsu Nishihara, Toshiaki Morichika, Junichi Sugitani, Koji Tsuchida
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Patent number: 4477711Abstract: The invention relates to an apparatus to perform plasma welding, by providing a cooling water temperature detector at the inlet side of cooling water in the plasma welding torch, controlling the temperature at the inlet side of the cooling water running into the plasma welding torch at a set temperature of more than 4.degree. C. and less than 18.degree. C., starting a plasma arc when the temperature of the cooling water reaches a specified point after starting to pass the cooling water, and moving the base metals and the torch relatively upon lapse of a specified time allowed to form a keyhole after start of the plasma arc.Type: GrantFiled: October 29, 1981Date of Patent: October 16, 1984Assignee: Kubota Ltd.Inventors: Takao Mihara, Toshiaki Morichika, Shigenori Sone
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Patent number: 4444731Abstract: A reactor tube for thermally cracking or reforming hydrocarbons comprising an outer tube member made of Ni-containing heat resisting material and having enhanced mechanical strength with a large wall thickness, and an inner tube member of small wall thickness fitted in the outer tube member and made of heat resisting material free from Ni or with a low Ni content. The inner and outer tube members have been subjected to a diffusion treatment with a thin coating of Ni-P solid solution provided at the junction therebetween and thereby bonded together.Type: GrantFiled: February 25, 1982Date of Patent: April 24, 1984Assignees: Kubota Ltd., Toyo Engineering CorporationInventors: Keizo Konoki, Takanobu Shinohara, Ikuyoshi Kochi, Keiichi Shibata, Hisakatsu Nishihara, Toshiaki Morichika, Junichi Sugitani, Koji Tsuchida
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Patent number: 4421558Abstract: An iron-based heat-resistant cast alloy for high-temperature, high-pressure pipe, consisting essentially of, by weight %,______________________________________ C 0.10 to 0.16 1.0 .gtoreq. Si > 0 1.5 .gtoreq. Mn > 0 Cr 17 to 23 Ni 28 to 35 Nb 0.3 to 2.0 0.1 .gtoreq. Mo .gtoreq. 0 0.08 .gtoreq. N .gtoreq. 0 ______________________________________One or two or more kinds of: ______________________________________ B 0.001 to 0.080 Ti 0.011 to 0.02 Ca 0.001 to 0.01 Ce and/or La 0.001 to 0.01 Zr 0.01 to 0.10 Fe balance.Type: GrantFiled: January 5, 1981Date of Patent: December 20, 1983Assignee: Kubota Ltd.Inventors: Toshiaki Morichika, Junichi Sugitani, Takao Kobayashi
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Patent number: 4391635Abstract: Ferrite-austenitic two-phased stainless steel with high corrosion resistance and toughness containing the following, which may be manufactured easily by furnace melting in the atmosphere composition (by weight %)______________________________________ C less than 0.10% Si less than 1.5% Mn less than 1.5% P less than 0.04% S less than 0.04% Cr 22-30% Ni 3-6% Mo 0.5-1.5% Cu 0.4-1.0% N less than 0.1% Nb 0.1-0.24% Fe Balance and Creq/Nieq is 3-4.Type: GrantFiled: July 6, 1981Date of Patent: July 5, 1983Assignee: Kubota, Ltd.Inventors: Shinichi Murakami, Toshiaki Morichika, Hisashi Hiraishi, Hiroyuki Shiokawa
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Patent number: 4371775Abstract: The invention relates to a method and an apparatus to perform plasma welding, by providing a cooling water temperature detector at the inlet side of cooling water in the plasma welding torch, controlling the temperature at the inlet side of the cooling water running into the plasma welding torch at a set temperature of more than 4.degree. C. and less than 18.degree. C., starting a plasma arc when the temperature of the cooling water reaches a specified point after starting to pass the cooling water, and moving the base metals and the torch relatively upon lapse of a specified time allowed to form a keyhole after start of the plasma arc.Type: GrantFiled: April 6, 1981Date of Patent: February 1, 1983Assignee: Kubota, Ltd.Inventors: Takao Mihara, Toshiaki Morichika, Shigenori Sone
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Patent number: 4345941Abstract: A heat resistant alloy useful for floor rails, rollers and like structures for use in furnaces and having low amenability to the pick-up of scales formed on the surface of steel materials during heat treatment. The alloy has the composition, in proportions by weight, of 0.1-0.5% C, 1.0-1.8% Si, up to 2.0% Mn, 26-30% Cr, 34-40% Ni, 3.ltoreq.Co.ltoreq.9%, 37.ltoreq.Ni+Co.ltoreq.43%, 0.5-3.0% Mo, 0.5 to 5.0% Nb, 0.5-10% W, up to 0.04% P, up to 0.04% S, and balance Fe.Type: GrantFiled: December 11, 1979Date of Patent: August 24, 1982Assignee: Kubota Ltd.Inventors: Hisashi Hiraishi, Toshiaki Morichika, Shinichi Murakami
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Patent number: 4224061Abstract: A high corrosion resistant and high strength medium Cr and low Ni stainless cast steel which is produced from material including predetermined amounts of elements at predetermined weight percentage and remaining portion substantially of Fe. When the above material is further subjected to heat treatments under predetermined conditions, stainless steels superior in yield strength and having stable corrosion resistance against circumstances influenced by strong acids are presented.Type: GrantFiled: July 28, 1978Date of Patent: September 23, 1980Assignee: Kubota Ltd.Inventors: Hisashi Hiraishi, Toshiaki Morichika, Shinichi Murakami, Katsutaro Akamatsu
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Patent number: 4218268Abstract: A high corrosion resistant and high strength medium Cr and low Ni stainless cast steel which is produced from material including predetermined amounts of elements at predetermined weight percentage and remaining portion substantially of Fe. When the above material is further subjected to heat treatments under predetermined conditions, stainless steels superior in yield strength and having stable corrosion resistance against circumstances influenced by strong acids are presented.Type: GrantFiled: July 28, 1978Date of Patent: August 19, 1980Assignee: Kubota Ltd.Inventors: Hisashi Hiraishi, Toshiaki Morichika, Shinichi Murakami, Katsutaro Akamatsu
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Patent number: 4050929Abstract: A heat resisting alloyed steel having a highly improved compressive strength at the elevated temperature within the range of 1,250.degree. to 1,300.degree. C. contains carbon, silicon, chromium, nickel, manganese, cobalt, molybdenum, phosphorus, sulfur, niobium and iron. Tungsten may be added as desired.Type: GrantFiled: December 1, 1975Date of Patent: September 27, 1977Assignee: Kubota, Ltd.Inventors: Shinichi Murakami, Katsutaro Akamatsu, Toshiaki Morichika, Hisashi Hiraishi