Patents by Inventor Masahisa Inagaki
Masahisa Inagaki 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: 8989339Abstract: Disclosed is a zirconium alloy material having high corrosion resistance regardless of thermal history during its manufacturing process. The zirconium alloy material is obtained by providing a zirconium alloy containing on the mass basis: 0.001% to 1.9% of Sn, 0.01% to 0.3% of Fe, 0.01% to 0.3% of Cr, 0.001% to 0.3% of Ni, 0.001% to 3.0% of Nb, 0.027% or less of C, 0.025% or less of N, 4.5% or less of Hf and 0.16% or less of O with the remainder being inevitable impurities and zirconium, being formed of a bulk alloy and a surface layer, in which the surface layer has a plastic strain of 3 or more or a Vickers hardness of 260 HV or more and an arithmetic mean surface roughness Ra of 0.2 ?m or less.Type: GrantFiled: November 8, 2011Date of Patent: March 24, 2015Assignee: Hitachi, Ltd.Inventors: Ryo Ishibashi, Masahisa Inagaki, Hideo Soneda, Naoya Okizaki, Tomomi Nakamura, Yoshikazu Todaka, Hiroaki Azuma, Nozomu Adachi, Minoru Umemoto
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Publication number: 20120114091Abstract: Disclosed is a zirconium alloy material having high corrosion resistance regardless of thermal history during its manufacturing process. The zirconium alloy material is obtained by providing a zirconium alloy containing on the mass basis: 0.001% to 1.9% of Sn, 0.01% to 0.3% of Fe, 0.01% to 0.3% of Cr, 0.001% to 0.3% of Ni, 0.001% to 3.0% of Nb, 0.027% or less of C, 0.025% or less of N, 4.5% or less of Hf and 0.16% or less of O with the remainder being inevitable impurities and zirconium, being formed of a bulk alloy and a surface layer, in which the surface layer has a plastic strain of 3 or more or a Vickers hardness of 260 HV or more and an arithmetic mean surface roughness Ra of 0.2 ?m or less.Type: ApplicationFiled: November 8, 2011Publication date: May 10, 2012Inventors: Ryo ISHIBASHI, Masahisa Inagaki, Hideo Soneda, Naoya Okizaki, Tomomi Nakamura, Yoshikazu Todaka, Hiroaki Azuma, Nozomu Adachi, Minoru Umemoto
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Patent number: 7661575Abstract: A friction stirring-welding method capable of increasing the welding strength of a lap joint. A welding tool (1) comprises a small diameter projected part (2) at the tip of a shoulder (3). The welding tool is press-fitted to the upper plate (4) of the lap joint while being rotated. By a friction stirring action, an upper plate side welding boundary surface (6) plastically flows, a surface oxidation film on a lapped surface is peeled off, and the boundary surface is activated to provide an excellent welding part. Also, since the welding tool is formed in a shape having the small diameter semispherical projected part (2) at the tip thereof, the thickness (12) of an upper plate welding part is increased, and a lap joint part with high welding strength can be provided.Type: GrantFiled: May 11, 2009Date of Patent: February 16, 2010Assignee: Hitachi, Ltd.Inventors: Kinya Aota, Masahisa Inagaki, Satoshi Hirano, Kazutaka Okamoto
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Patent number: 7635075Abstract: A problem of FSW spot-welding is that a bonding strength tends to be low, since an area of metallic bonding is limited to the neighborhood of a pin portion of the welding tool. In order to solve the problem, after a tool (1) is inserted into a member (4) to be welded, a rotation shaft of the welding tool is tilted around a predetermined point (13) as a fulcrum, and the tip portion of the welding tool (1) is swung to enlarge a plastic flow area caused by rotation of the tool. As a result, the welding strength can be increased.Type: GrantFiled: March 16, 2005Date of Patent: December 22, 2009Assignee: Hitachi, Ltd.Inventors: Satoshi Hirano, Kinya Aota, Masahisa Inagaki, Kazutaka Okamoto, Tomio Odakura
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Publication number: 20090218033Abstract: A friction stirring-welding method capable of increasing the welding strength of a lap joint. A welding tool (1) comprises a small diameter projected part (2) at the tip of a shoulder (3). The welding tool is press-fitted to the upper plate (4) of the lap joint while being rotated. By a friction stirring action, an upper plate side welding boundary surface (6) plastically flows, a surface oxidation film on a lapped surface is peeled off, and the boundary surface is activated to provide an excellent welding part. Also, since the welding tool is formed in a shape having the small diameter semispherical projected part (2) at the tip thereof, the thickness (12) of an upper plate welding part is increased, and a lap joint part with high welding strength can be provided.Type: ApplicationFiled: May 11, 2009Publication date: September 3, 2009Inventors: Kinya Aota, Masahisa Inagaki, Satoshi Hirano, Kazutaka Okamoto
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Publication number: 20070181637Abstract: A problem of FSW spot-welding is that a bonding strength tends to be low, since an area of metallic bonding is limited to the neighborhood of a pin portion of the welding tool. In order to solve the problem, after a tool (1) is inserted into a member (4) to be welded, a rotation shaft of the welding tool is tilted around a predetermined point (13) as a fulcrum, and the tip portion of the welding tool (1) is swung to enlarge a plastic flow area caused by rotation of the tool. As a result, the welding strength can be increased.Type: ApplicationFiled: March 16, 2005Publication date: August 9, 2007Applicant: HITACHI, LTD.Inventors: Satoshi Hirano, Kinya Aota, Masahisa Inagaki, Kazutaka Okamoto, Tomio Odakura
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Publication number: 20060138197Abstract: A friction stirring-welding method capable of increasing the welding strength of a lap joint. A welding tool (1) comprises a small diameter projected part (2) at the tip of a shoulder (3). The welding tool is press-fitted to the upper plate (4) of the lap joint while being rotated. By a friction stirring action, an upper plate side welding boundary surface (6) plastically flows, a surface oxidation film on a lapped surface is peeled off, and the boundary surface is activated to provide an excellent welding part. Also, since the welding tool is formed in a shape having the small diameter semispherical projected part (2) at the tip thereof, the thickness (12) of an upper plate welding part is increased, and a lap joint part with high welding strength can be provided.Type: ApplicationFiled: June 11, 2004Publication date: June 29, 2006Inventors: Kinya Aota, Masahisa Inagaki, Satoshi Hirano, Kazutaka Okamoto
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Patent number: 6909185Abstract: A composite material is provided, which has a low thermal expansivity, a high thermal conductivity, and a good plastic workability, which composite material may be applied to semiconductor devices and many other uses. The composite material is composed of metal and inorganic particles having a smaller coefficient of thermal expansion than the metal. It is characterized in that the inorganic particles are dispersed in such a way that 95% or more of them (in terms of their area in cross-section) form aggregates of complex configuration joined together. The composite material contains 20-80 vol % of copper oxide, with the remainder being copper. It has a coefficient of thermal expansion of 5×10?6 to 14×10?6/° C. and thermal conductivity of 30-325 W/m·K in the range of room temperature to 300° C. It is suitable for the radiator plate of semiconductor devices and the dielectric plate of electrostatic attractors.Type: GrantFiled: December 7, 1998Date of Patent: June 21, 2005Assignee: Hitachi, Ltd.Inventors: Yasuo Kondo, Junya Kaneda, Tasuhisa Aono, Teruyoshi Abe, Masahisa Inagaki, Ryuichi Saito, Yoshihiko Koike, Hideo Arakawa
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Publication number: 20050129564Abstract: A magnesium alloy consisting essentially of 10 to 15% by weight of Al, 0.5 to 10% by weight of Sn, 0.1 to 3% by weight of Y, and 0.1 to 1% by weight of Mn, the balance being Mg and inevitable impurities.Type: ApplicationFiled: November 24, 2004Publication date: June 16, 2005Inventors: Kiyomi Nakamura, Mitsuo Hayashibara, Masahisa Inagaki, Yasuhisa Aono, Shigeyuki Kemma
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Patent number: 6874672Abstract: In a frictional stirring weld apparatus for bonding elements with a rotary tool, a head is movable with respect to the elements to position and orient the rotary tool so that a pin of the rotary tool is aligned along a boundary between first surfaces and a shoulder of the rotary tool faces to second surfaces extending radially outward from the first surfaces, and to generate a relative movement between the rotary tool and the elements along the second surfaces, and a compensating member is capable of holding thereon the rotary tool, at least partially rotatable on the rotational axis with respect to the head to rotate the rotary tool, and supported on the head movably along the rotational axis with respect to the head so that a positional relationship between the rotary tool and a combination of the elements is adjustable in a direction parallel to the rotational axis.Type: GrantFiled: February 25, 2003Date of Patent: April 5, 2005Assignee: Hitachi, Ltd.Inventors: Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki, Tomio Odakura
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Patent number: 6843405Abstract: Different metallic materials are joined in such a manner that friction heat generated by friction between a rotating probe made of a hard material and one of the metallic materials having a lower mechanical strength or a lower melting point than the other to effect plastic flow of the one material and the probe is inserted into a pit formed in a joint zone of the other material to fill the pit with the plastic flow material.Type: GrantFiled: February 5, 2003Date of Patent: January 18, 2005Assignee: Hitachi, Ltd.Inventors: Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki, Yasuhisa Aono
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Patent number: 6833617Abstract: It is an object of the present invention to provide a composite material having low thermal expansivity, high thermal conductivity, and good plastic workability, which is applied to semiconductor devices and many other uses. The composite material is composed of metal and inorganic particles having a smaller coefficient of thermal expansion than said metal. It is characterized in that said inorganic particles disperse in such a way that 95% or more of them (in terms of their area in cross-section) form aggregates of complex configuration joining together. The composite material contains 20-80 vol % of copper oxide, with the remainder being copper. It has a coefficient of thermal expansion of 5×10−6 to 14×10−6/° C. and thermal conductivity of 30-325 W/m·K in the range of room temperature to 300° C. It is suitable for the radiator plate of semiconductor devices and the dielectric plate of electrostatic attractors.Type: GrantFiled: February 12, 2003Date of Patent: December 21, 2004Assignee: Hitachi, Ltd.Inventors: Yasuo Kondo, Junya Kaneda, Tasuhisa Aono, Teruyoshi Abe, Masahisa Inagaki, Ryuichi Saito, Yoshihiko Koike, Hideo Arakawa
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Patent number: 6814544Abstract: In a joining method for manufacturing a rotor blade by joining a plurality of members, the members are pressed so as to exert a predetermined pressure on the bonding interface. A pulse voltage is applied to the members to pass electric current therethrough, and the joint portion is heated by resistance heating generated at the bonding interface and in the bulk of the members to cause diffusion bonding and thereby to join the members to each other. With this method, good joining can be achieved without substantially changing the crystal structure and mechanical properties of the base metals.Type: GrantFiled: August 27, 2002Date of Patent: November 9, 2004Assignee: Hitachi, Ltd.Inventors: Takeshi Tsukamoto, Kunio Miyazaki, Masahisa Inagaki
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Publication number: 20040173663Abstract: The invention provides a friction stir welding apparatus and method and a processing apparatus and method, which are not easily affected by deformations of a work being processed. The friction stir welding apparatus inserts a rotating tool into the work and moves the rotating tool relative to the work to join members of the work. The friction stir welding apparatus and method and the processing apparatus and method of the invention, the latter cutting or grinding the work with a rotating cutter or grindstone, comprises controlling a relative distance between the tool, cutter or grindstone and the work under the joining or processing operation or an insertion depth so that the load factor or electric current of a spindle motor for rotating the tool, cutter or grindstone is within a predetermined range, and a controller therefor.Type: ApplicationFiled: March 15, 2004Publication date: September 9, 2004Inventors: Kazutaka Okamoto, Satoshi Hirano, Masayuki Doi, Hisanori Okamura, Masahisa Inagaki, Tomio Odakura, Masaru Tomobe
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Publication number: 20040155094Abstract: Different metallic materials are joined in such a manner that friction heat generated by fiction between a rotating probe made of a hard material and one of the metallic materials having a lower mechanical strength or a lower melting point than the other to effect plastic flow of the one material and the probe is inserted into a pit formed in a joint zone of the other material to fill the pit with the plastic flow material.Type: ApplicationFiled: February 3, 2004Publication date: August 12, 2004Inventors: Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki, Yasuhisa Aono
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Patent number: 6729526Abstract: The invention provides a friction stir welding apparatus and method and a processing apparatus and method, which are not easily affected by deformations of a work being processed. The friction stir welding apparatus inserts a rotating tool into the work and moves the rotating tool relative to the work to join members of the work. The friction stir welding apparatus and method and the processing apparatus and method of the invention, the latter cutting or grinding the work with a rotating cutter or grindstone, comprises controlling a relative distance between the tool, cutter or grindstone and the work under the joining or processing operation or an insertion depth so that the load factor or electric current of a spindle motor for rotating the tool, cutter or grindstone is within a predetermined range, and a controller therefor.Type: GrantFiled: March 19, 2002Date of Patent: May 4, 2004Assignee: Hitachi, Ltd.Inventors: Kazutaka Okamoto, Satoshi Hirano, Masayuki Doi, Hisanori Okamura, Masahisa Inagaki, Tomio Odakura, Masaru Tomobe
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Publication number: 20040079787Abstract: The invention provides a discontinuous friction stir welding apparatus and welding method having a compact machine head capable of corresponding to a wide usage. In a friction stir welding apparatus provided with a tool (1) having a shoulder portion (1a) with a large diameter and a pin portion (1b) with a small diameter protruding in an axial direction, and welding by inserting the tool to a material to be welded while rotating the tool, the tool, a moving mechanism of the tool and a backing member (5) for the welded material are received in one frame (10). The tool moving mechanism has a main axis motor (2) for rotating the tool, an axial moving apparatus (4, 13a, 13b, 14) for moving the tool in a direction of a rotation axis, and a welding direction moving apparatus (9, 17) for moving the tool along a weld line of the welded material.Type: ApplicationFiled: August 18, 2003Publication date: April 29, 2004Inventors: Kazutaka Okamoto, Satoshi Hirano, Masayuki Doi, Masahisa Inagaki
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Publication number: 20040074944Abstract: In a frictional stirring weld apparatus for bonding elements with a rotary tool, a head is movable with respect to the elements to position and orient the rotary tool so that a pin of the rotary tool is aligned along a boundary between first surfaces and a shoulder of the rotary tool faces to second surfaces extending radially outward from the first surfaces, and to generate a relative movement between the rotary tool and the elements along the second surfaces, and a compensating member is capable of holding thereon the rotary tool, at least partially rotatable on the rotational axis with respect to the head to rotate the rotary tool, and supported on the head movably along the rotational axis with respect to the head so that a positional relationship between the rotary tool and a combination of the elements is adjustable in a direction parallel to the rotational axis.Type: ApplicationFiled: February 25, 2003Publication date: April 22, 2004Inventors: Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki, Tomio Odakura
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Publication number: 20040057782Abstract: Different metallic materials are joined in such a manner that friction heat generated by friction between a rotating probe made of a hard material and one of the metallic materials having a lower mechanical strength or a lower melting point than the other to effect plastic flow of the one material and the probe is inserted into a pit formed in a joint zone of the other material to fill the pit with the plastic flow material.Type: ApplicationFiled: February 5, 2003Publication date: March 25, 2004Inventors: Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki, Yasuhisa Aono
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Publication number: 20030146499Abstract: It is an object of the present invention to provide a composite material having low thermal expansivity, high thermal conductivity, and good plastic workability, which is applied to semiconductor devices and many other uses.Type: ApplicationFiled: February 12, 2003Publication date: August 7, 2003Inventors: Yasuo Kondo, Junya Kaneda, Tasuhisa Aono, Teruyoshi Abe, Masahisa Inagaki, Ryuichi Saito, Yoshihiko Koike, Hideo Arakawa