Patents by Inventor Raita WADA
Raita WADA 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: 11635120Abstract: A sintered friction material for brake having a high friction coefficient, with which reduction of the friction coefficient is prevented at high temperature and stable brake performance is maintained. It comprises: a metal matrix of Ni or Ni+Fe (small amount); a solid lubricant (a); and a friction adjusting material (b) including: metal or alloy particles (b1) having an average particle size of 50 ?m or more and containing at least one selected from W, Mo, Cr, and FeW; and inorganic particles (b2) containing at least one selected from oxides, nitrides, carbides, and intermetallic compounds. An average particle size db1 of b1 and an average particle size db2 of b2 satisfy db1<db2. Dispersing, in the metal matrix, b1 and b2 satisfying particular conditions as the friction adjusting material can produce a geometrical structure (particle structure with a high filling density) suitable for preventing plastic deformation of the sintered friction material.Type: GrantFiled: March 14, 2018Date of Patent: April 25, 2023Assignee: Sunstar Engineering Inc.Inventors: Hoshiaki Terao, Raita Wada, Tsuyoshi Nakatsuji, Yoshinori Shinagawa
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Publication number: 20220299278Abstract: Provided is a heat sink having a clad structure of Co—Mo composite materials and Cu materials, satisfying high heat-sink properties required of the heat sink for use in a semiconductor package with a frame on which a high-output and small-sized semiconductor is mounted, and preventing, when applied to the semiconductor package with a frame, crack of the frame due to local stress concentration. The heat sink has three or more Cu layers and two or more Cu—Mo composite layers alternately stacked in a thickness direction so that the Cu layers are outermost layers on both sides thereof, the Cu layers as the outermost layers each having a thickness t1 of 40 ?m or more, the heat sink satisfying 0.06?t1/T?0.27 (where T: heat sink thickness) and t2/T?0.36/[(total number of layers?1)/2] (where t2: Cu—Mo composite layer thickness, the total number of layers: sum of numbers of Cu layers and Cu—Mo composite layers).Type: ApplicationFiled: August 28, 2020Publication date: September 22, 2022Applicants: JFE PRECISION CORPORATION, JFE STEEL CORPORATIONInventors: Hoshiaki TERAO, Kouichi HASHIMOTO, Raita WADA
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Publication number: 20210031268Abstract: Provided is a method of manufacturing a soft magnetic dust core. The method includes: preparing coated powder including amorphous powder made of an Fe-B-Si-P-C-Cu-based alloy, an Fe-B-P-C-Cu-based alloy, an Fe-B-Si-P-Cu-based alloy, or an Fe-B-P-Cu-based alloy, with a first initial crystallization temperature Tx1 and a second initial crystallization temperature Tx2; and a coating formed on a surface of particles of the amorphous powder; applying a compacting pressure to the coated powder or a mixture of the coated powder and the amorphous powder at a temperature equal to or lower than Tx1?100 K; and heating to a maximum end-point temperature equal to or higher than Tx1?50 K and lower than Tx2 with the compacting pressure being applied.Type: ApplicationFiled: October 21, 2020Publication date: February 4, 2021Applicants: JFE STEEL CORPORATION, JFE PRECISION CORPORATION, TOKIN CORPORATION, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Naomichi NAKAMURA, Makoto NAKASEKO, Takuya TAKASHITA, Mineo MURAKI, Hoshiaki TERAO, Raita WADA, Akiri URATA, Yu KANAMORI, Makoto YAMAKI, Koichi OKAMOTO, Toshinori TSUDA, Shoichi SATO, Kimihiro OZAKI
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Publication number: 20200263750Abstract: A sintered friction material for brake having a high friction coefficient, with which reduction of the friction coefficient is prevented at high temperature and stable brake performance is maintained. It comprises: a metal matrix of Ni or Ni+Fe (small amount); a solid lubricant (a); and a friction adjusting material (b) including: metal or alloy particles (b1) having an average particle size of 50 ?m or more and containing at least one selected from W, Mo, Cr, and FeW; and inorganic particles (b2) containing at least one selected from oxides, nitrides, carbides, and intermetallic compounds. An average particle size db1 of b1 and an average particle size db2 of b2 satisfy db1<db2. Dispersing, in the metal matrix, b1 and b2 satisfying particular conditions as the friction adjusting material can produce a geometrical structure (particle structure with a high filling density) suitable for preventing plastic deformation of the sintered friction material.Type: ApplicationFiled: March 14, 2018Publication date: August 20, 2020Applicants: JFE PRECISION CORPORATION, Sunstar Engineering Inc.Inventors: Hoshiaki TERAO, Raita WADA, Tsuyoshi NAKATSUJI, Yoshinori SHINAGAWA
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Publication number: 20180361474Abstract: Provided is a soft magnetic dust core having high density and favorable properties. A method of manufacturing a soft magnetic dust core includes: preparing coated powder including amorphous powder made of an Fe—B—Si—P—C—Cu-based alloy, an Fe—B—P—C—Cu-based alloy, an Fe—B—Si—P—Cu-based alloy, or an Fe—B—P—Cu-based alloy, with a first initial crystallization temperature Tx1 and a second initial crystallization temperature Tx2; and a coating formed on a surface of particles of the amorphous powder; applying a compacting pressure to the coated powder or a mixture of the coated powder and the amorphous powder at a temperature equal to or lower than Tx1?100 K; and heating to a maximum end-point temperature equal to or higher than Tx1?50 K and lower than Tx2 with the compacting pressure being applied.Type: ApplicationFiled: July 28, 2016Publication date: December 20, 2018Applicants: JFE STEEL CORPORATION, JFE PRECISION CORPORATION, TOKIN CORPORATION, National Institute of Advanced Industrial Science and TechnologyInventors: Naomichi NAKAMURA, Makoto NAKASEKO, Takuya TAKASHITA, Mineo MURAKI, Hoshiaki TERAO, Raita WADA, Akiri URATA, Yu KANAMORI, Makoto YAMAKI, Koichi OKAMOTO, Toshinori TSUDA, Shoichi SATO, Kimihiro OZAKI
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Publication number: 20180169759Abstract: Provided is a soft magnetic dust core having high density and favorable properties. A method of manufacturing a soft magnetic dust core includes: preparing coated powder including amorphous powder made of an Fe—B—Si—P—C—Cu-based alloy, an Fe—B—P—C—Cu-based alloy, an Fe—B—Si—P—Cu-based alloy, or an Fe—B—P—Cu-based alloy, with a first initial crystallization temperature Tx1 and a second initial crystallization temperature Tx2; and a coating formed on a surface of particles of the amorphous powder; applying a compacting pressure to the coated powder or a mixture of the coated powder and the amorphous powder at a temperature equal to or lower than Tx1?100 K; and heating to a maximum end-point temperature equal to or higher than Tx1?50 K and lower than Tx2 with the compacting pressure being applied.Type: ApplicationFiled: July 28, 2016Publication date: June 21, 2018Applicants: JFE STEEL CORPORATION, JFE PRECISION CORPORATION, TOKIN CORPORATION, National Institute of Advanced Industrial Science and TechnologyInventors: Naomichi NAKAMURA, Makoto NAKASEKO, Takuya TAKASHITA, Mineo MURAKI, Hoshiaki TERAO, Raita WADA, Akiri URATA, Yu KANAMORI, Makoto YAMAKI, Koichi OKAMOTO, Toshinori TSUDA, Shoichi SATO, Kimihiro OZAKI