Patents by Inventor Yasuhiro Maehara
Yasuhiro Maehara 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: 11967223Abstract: The purpose of the present invention is to provide a hazard prediction method that can perform hazard prediction activities so as to prevent accidents, regardless of skills and personalities of workers.Type: GrantFiled: April 2, 2020Date of Patent: April 23, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Sachi Tsujimura, Jun Onishi, Yasuhiro Maehara, Hidenobu Hirota, Naotsugu Ambe
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Publication number: 20220231489Abstract: It is intended to provide a cable pulling machine that can avoid, even when installed at a high place, a stop of pulling and a cable installation method. A cable pulling machine according to the present invention includes two roller portions c having outer peripheries between which a cable a is to be held and a guide f that introduces the cable a between the roller portions c. The guide f adjusts an angle ? formed between a straight line connecting respective centers o of the roller portions c and the cable a introduced between the roller portions c to a value of not less than 45° and not more than 90°.Type: ApplicationFiled: May 10, 2019Publication date: July 21, 2022Inventors: Jun ONISHI, Yasuhiro MAEHARA, Hidenobu HIROTA, Naotsugu AMBE
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Publication number: 20220215743Abstract: The purpose of the present invention is to provide a hazard prediction method that can perform hazard prediction activities so as to prevent accidents, regardless of skills and personalities of workers.Type: ApplicationFiled: April 2, 2020Publication date: July 7, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Sachi TSUJIMURA, Jun ONISHI, Yasuhiro MAEHARA, Hidenobu HIROTA, Naotsugu AMBE
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Patent number: 10106870Abstract: A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are desirably performed a plurality of times. log N?0.4742+17.629×exp(?0.Type: GrantFiled: March 20, 2017Date of Patent: October 23, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yasuhiro Maehara, Mitsuharu Yonemura, Takashi Maeda, Keiji Nakajima, Tsuneaki Nagamichi
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Patent number: 10023940Abstract: A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are most desirably performed for a plurality of times. log N?0.4742+17.629×exp(?0.Type: GrantFiled: March 20, 2006Date of Patent: July 17, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yasuhiro Maehara, Mitsuharu Yonemura, Takashi Maeda, Keiji Nakajima, Tsuneaki Nagamichi
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Publication number: 20170247779Abstract: A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are desirably performed a plurality of times. log N?0.4742+17.629×exp(?0.Type: ApplicationFiled: March 20, 2017Publication date: August 31, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yasuhiro MAEHARA, Mitsuharu Yonemura, Takashi Maeda, Keiji Nakajima, Tsuneaki Nagamichi
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Publication number: 20100189593Abstract: A copper alloy material consists of, by mass % Ti: 0.01-2.5%, Cr: 0.01-0.5%, Fe: 0.01% or more and less than 1%, and the balance Cu and impurities. The copper alloy possesses excellent strength, electrical conductivity, and workability without containing any environmentally harmful elements. These properties are attained by control of the total number and the diameter of precipitates and inclusions having a diameter of 1 ?m, and control of the relationship between tensile strength TS (MPa) and electrical conductivity, IACS (%). The copper alloy material is a sheet and the relationship between tensile strength and the bending workability in a bad way B90 of the copper alloy material as well as the relationship between elongation and tensile strength are also controlled with respect to each other for property improvement.Type: ApplicationFiled: January 26, 2010Publication date: July 29, 2010Inventors: Yasuhiro MAEHARA, Mitsuharu YONEMURA, Keiji NAKAJIMA, Tsuneaki NAGAMICHI
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Publication number: 20070062619Abstract: A copper alloy that has a specific chemical composition, the balance being Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). This copper alloy is obtained by cooling a bloom, a slab, a billet or an ingot in at least a temperature range from the temperature of the bloom, the slab, the billet or the ingot just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are most desirably performed for a plurality of times. log N<0.4742+17.629×exp(?0.Type: ApplicationFiled: September 11, 2006Publication date: March 22, 2007Inventors: Yasuhiro Maehara, Mitsuharu Yonemura, Keiji Nakajima, Tsuneaki Nagamichi
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Publication number: 20060239853Abstract: A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are most desirably performed for a plurality of times. log N?0.4742+17.629×exp(?0.Type: ApplicationFiled: March 20, 2006Publication date: October 26, 2006Applicant: SUMITOMO METAL INDUSTRIES, LTD.Inventors: Yasuhiro Maehara, Mitsuharu Yonemura, Takashi Maeda, Keiji Nakajima, Tsuneaki Nagamichi
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Publication number: 20060180293Abstract: A continuous casting mold for a Cu alloy, using any one member selected from a glassy carbon, a metal-based self-lubricating composite or a graphite with a bulk density exceeding 1.92, at least for the mold member including the solidification starting position of the Cu alloy melt. A continuous casting mold for a Cu alloy, composed of any one member selected from a graphite, a ceramic and a metal member or of a combination of two or more parts of members thereof, in which at least the inner wall in the solidification starting position of the Cu alloy melt is coated with a self-lubricant or a metal-based self-lubricating composite material.Type: ApplicationFiled: March 23, 2006Publication date: August 17, 2006Applicant: SUMITOMO METAL INDUSTRIES, LTD.Inventors: Yasuhiro Maehara, Mitsuharu Yonemura, Keiji Nakajima, Naotsugu Yoshida, Masahiro Aoki
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Patent number: 6730240Abstract: A colored, transparent film-forming composition, which is made up of (a) a reaction product of an epoxy group-containing alkoxysilane (a-1) and an amino group-containing alkoxysilane (a-2) having active hydrogen therein, (b) an acid catalyst, (c) an alkali-soluble UV absorber, (d) at least one solvent selected from organic solvents having a boiling point of 100 to 250° C., and (e) a dye and/or a pigment, has a good coating performance and room temperature curing characteristic and can provide a film having good film strength and film removability after use. The coating method of the composition and the removing method of the film obtained from the composition are also described.Type: GrantFiled: January 16, 2001Date of Patent: May 4, 2004Assignees: Ishihara Chemical Co., Ltd., Sunshine Inc.Inventors: Kunio Arimoto, Chihito Tago, Hideo Nishida, Yasuhiro Maehara, Tatsuya Ohta, Kazutoshi Yoshihara, Satoshi Sawamura
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Publication number: 20010031812Abstract: A colored, transparent film-forming composition, which comprises (a) a reaction product of an epoxy group-containing alkoxysilane (a-1) and an amino group-containing alkoxysilane (a-2) having active hydrogen therein, (b) an acid catalyst, (c) an alkali-soluble UV absorber, (d) at least one solvent selected from organic solvents having a boiling point of 100 to 250° C., and (e) a dye and/or a pigment, has a good coating performance, a good room temperature curing characteristic and can provide a film having good film strength and good film removability after use. The coating method of the composition and the removing method of the film obtained from the composition are also described.Type: ApplicationFiled: January 16, 2001Publication date: October 18, 2001Inventors: Kunio Arimoto, Chihito Tago, Hideo Nishida, Yasuhiro Maehara, Tatsuya Ohta, Kazutoshi Yoshihara, Satoshi Sawamura
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Patent number: 4812177Abstract: A superplastic hot working method for a duplex-phase, nitrogen-containing ferrous alloy and stainless steel, and a superplastic duplex-phase ferrous alloy are disclosed. The ferrous alloy comprises: at least one of Si and Mn in an amount of not less than 0.5 % and not less than 1.7%, respectively; and N: at least 0.01% in solid solution, wherein Si eq and Mn eq which are defined as: Si eq=Si+(2/3) (Cr+Mo), and Mn eq=Mn+2Ni+60C+50N, satisfy the formula:(5/6) (Si eq)-15/2.ltoreq.Mn eq.ltoreq.(11/5)(Si eq)-77/5,and its superplastic hot working is carried out by deforming the alloy heated to 700.degree.-1200.degree. C. at a strain rate of 1.times.10.sup.-6 S.sup.-1 to 1.times.10.sup.0 S.sup.-1. In another aspect, superplastic hot working of a duplex-phase stainless steel comprising Cr: 10.0-35.0%, Ni: 2.0-18.0%; Mo: 0-6.0%, and N: 0.005-0.3% and having the values of Si eq and Mn eq as above is carried out by deforming the steel at a strain rate of from 1.times.10.sup.-6 S.sup.-1 to 1.times.10.sup.1 S.sup.Type: GrantFiled: January 25, 1988Date of Patent: March 14, 1989Assignee: Sumitomo Metal Industries, Ltd.Inventors: Yasuhiro Maehara, Yoshio Tarutani
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Patent number: 4802356Abstract: A method and apparatus of processing a continuously cast slab to prevent the formation of surface cracks by applying plastic strains to the surface layer of the slab in which a process of solidification is taking place. The method comprises pressing a projection against the slab surface under specified conditions prior to introducing the slab to a leveling stage.Type: GrantFiled: August 6, 1987Date of Patent: February 7, 1989Assignee: Sumitomo Metal Industries, Ltd.Inventors: Tsuneo Yamada, Tsutomu Sakashita, Hiroshi Tomono, Takashi Kimura, Yasuhiro Maehara, Kunio Yasumoto
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Patent number: 4722755Abstract: A duplex .alpha. (ferrite) and .gamma. (austenite) phase stainless steel exhibiting superplasticity at high strain rate is disclosed. The steel comprises Fe, Cr, and Ni as primary elements, and N in an amount of 0.05-0.25%, preferably 0.1-0.2% by weight. The amount of Cr+Mo+1.5xSi is preferred to be substantially three times as much as that of Ni+0.5.times.Mn+30.times.C+25.times.N. The disclosed steel shows good superplasticity in the temperature range of from 700.degree. C. to the point 100.degree. C. lower than the temperature at which the steel transforms into a single ferrite phase and at a strain rate of at least 1.times.10.sup.-6 s.sup.-1 and less than 1.times.10.sup.0 s.sup.-1, and can be elongated by more than 1000% at 900.degree. C. and at a strain rate of 1.5.times.10.sup.-2 s.sup.-1.Type: GrantFiled: November 29, 1985Date of Patent: February 2, 1988Assignee: Sumitomo Metal Industries, Ltd.Inventor: Yasuhiro Maehara
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Patent number: 4721600Abstract: A superplastic hot working method for a duplex-phase, nitrogen-containing ferrous alloy and stainless steel, and a superplastic duplex-phase ferrous alloy are disclosed. The ferrous alloy comprises: at least one of Si and Mn in an amount of not less than 0.5% and not less than 1.7%, respectively; and N: at least 0.01% in solid solution, wherein Si eq and Mn eq which are defined as:Si eq=Si+(2/3)(Cr+Mo), and Mn eq=Mn+2 Ni+60 C+50 N,satisfy the formula:(5/6)(Si eq)-15/2.ltoreq.Mn eq.ltoreq.(11/5)(Si eq)-77/5,and its superplastic hot working is carried out by deforming the alloy heated to 700.degree.-1200.degree. C. at a strain rate of 1.times.10.sup.-6 S.sup.-1 to 1.times.10.sup.0 S.sup.-1. In another aspect, superplastic hot working of a duplex-phase stainless steel comprising Cr: 10.0-35.0%, Ni: 2.0-18.0%, Mo: 0-6.0%, and N: 0.005-0.3% and having the values of Si eq and Mn eq as above is carried out by deforming the steel at a strain rate of from 1.times.10.sup.-6 S.sup.-1 to 1.times.10.sup.1 S.sup.Type: GrantFiled: March 27, 1986Date of Patent: January 26, 1988Assignee: Sumitomo Metal Industries, Ltd.Inventors: Yasuhiro Maehara, Yoshio Tarutani
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Patent number: 4709572Abstract: A continuously cast slab is processed to prevent the formation of surface cracks by applying plastic strains to the surface layer of the slab in which a process of solidification is taking place. The method comprises pressing a projection against the slab surface under specified conditions prior to introducing the slab to a leveling stage.Type: GrantFiled: July 30, 1985Date of Patent: December 1, 1987Assignee: Sumitomo Metal Industries, Ltd.Inventors: Tsuneo Yamada, Tsutomu Sakashita, Hiroshi Tomono, Takashi Kimura, Yasuhiro Maehara, Kunio Yasumoto
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Patent number: 4637841Abstract: A superplastic deforming process of a duplex stainless steel is disclosed. The process comprises the steps of:heating a ferrite + austenite duplex stainless steel to a temperature between the alpha-temperature and a temperature 200.degree. C. lower than the alpha-temperature, the heating temperature being 1000.degree. C. or higher;water quenching or force-cooling the duplex stainless steel to a temperature of 500.degree. C. or lower, alternatively working the duplex stainless steel at a temperature of 700.degree. C. or higher with a working ratio of 30% or more, or at a temperature lower than 700.degree. C. with a working ratio of 20% or more;reheating it to a temperature of between 700.degree. C. and a temperature 200.degree. C. lower than the alpha-temperature; andplastic deforming the thus-pretreated duplex stainless steel at a strain rate of 1.times.10.sup.-4 -5.times.10 S.sup.-1.Type: GrantFiled: June 21, 1985Date of Patent: January 20, 1987Assignee: Sumitomo Metal Industries, Ltd.Inventor: Yasuhiro Maehara