Patents by Inventor Yoshikazu Seki
Yoshikazu Seki 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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Publication number: 20050109982Abstract: An agent for removing organic chlorine compounds which is composed of (A) an iron powder having a BET specific surface area of from 0.010 to 3 m2/g, and (B1) a powder of at least one species of metal selected from the group VIII elements (excluding Fe) in the periodic table, and/or (B2) a porous substance in powder form supporting said metal. If the agent is composed of (A) and (B1), the amount of (B1) is 0.01 to 10 parts by mass for 100 parts by mass of (A). If the agent is composed of (A) and (B2), the amount of (B2) is 0.0001 to 10 parts by mass for 100 parts by mass of (A). This agent is capable of removing organic chlorine compounds efficiently.Type: ApplicationFiled: October 25, 2004Publication date: May 26, 2005Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Keita Yura, Masaaki Matsubara, Yasuko Yakou, Hitoshi Sakuma, Yoshikazu Seki, Satoshi Furuta, Koji Yamamoto
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Patent number: 6812197Abstract: The invention provides an iron-based cleaning powder capable of efficiently decomposing organic halides. The iron-based cleaning powder is made of iron alloy powder or iron powder produced with an atomization process. The iron alloy powder passes a 300 &mgr;m-mesh sieve at a proportion of not less than 90% and has an H2-reduction mass loss of 0.1 to 0.8% when it contains 0.3 to 1.1% of Mn. When the iron alloy powder contains 0.2 to 12% of Ni, it has an H2-reduction mass loss of 0.1 to 1.0%. The iron powder is used as mixed powder or partially alloyed powder together with Ni-containing powder. The iron powder passes a 300 &mgr;m-mesh sieve at a proportion of not less than 90% and has an H2-reduction mass loss of 0.1 to 1.0%. The Ni-containing powder has a Ni content of not less than 40% and passes a 45 &mgr;m-mesh sieve at a proportion of not less than 90%. The iron alloy powder and the iron powder have a martensite structure or a tempered martensite structure.Type: GrantFiled: June 26, 2003Date of Patent: November 2, 2004Assignee: Kobe Steel, Ltd.Inventors: Hitoshi Sakuma, Kenji Kawai, Yoshikazu Seki, Masaaki Matsubara, Yasuko Yakou, Koji Yamamoto
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Patent number: 6808089Abstract: Disclosed is a powder filling method in which powder is filled in a powder box having a discharging port at its bottom segment, the powder box is moved over a cavity to be targeted while being slid on a die plate, thereafter the powder in the powder box is dropped into the cavity by its own gravitational force and filled there, wherein the powder in the powder box is applied with a mechanical agitation when the powder in the powder box is at least dropped into the cavity in the powder filling method for filling the powder in the powder box while being dropped at least into the cavity.Type: GrantFiled: July 30, 2002Date of Patent: October 26, 2004Assignee: Kobe Steel, Ltd.Inventors: Yasuhiro Hashimoto, Yoshikazu Seki, Masahiro Murakami
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Patent number: 6749767Abstract: A mixed powder useful as a starting material for dust core comprises a uniform mixture of a soft magnetic powder and a binder resin so that the resultant dust core has an electric resistance capable of suppressing an eddy current between the soft magnetic powdery particles and high mechanical strength at room temperatures and also at high temperatures. In the mixed powder, the binder resin is made of a phenolic resin powder which has a methylol groups in the molecule and preferably has an average particle size of 30 &mgr;m or below and wherein when the phenolic resin powder is dissolved in boiling methanol in large excess, a content of an undissolved matter is at least 4 wt % based on the total of the phenolic resin. A dust core obtained from the mixed powder and its fabrication method are also described.Type: GrantFiled: March 19, 2002Date of Patent: June 15, 2004Inventors: Hiroyuki Mitani, Tsukasa Yuri, Kazuhisa Fujisawa, Yoshikazu Seki, Masahiro Murakami, Hirofumi Houjou
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Publication number: 20040009887Abstract: The invention provides an iron-based cleaning powder capable of efficiently decomposing organic halides. The iron-based cleaning powder is made of iron alloy powder or iron powder produced with an atomization process. The iron alloy powder passes a 300 &mgr;m-mesh sieve at a proportion of not less than 90% and has an H2-reduction mass loss of 0.1 to 0.8% when it contains 0.3 to 1.1% of Mn. When the iron alloy powder contains 0.2 to 12% of Ni, it has an H2-reduction mass loss of 0.1 to 1.0%. The iron powder is used as mixed powder or partially alloyed powder together with Ni-containing powder. The iron powder passes a 300 &mgr;m-mesh sieve at a proportion of not less than 90% and has an H2-reduction mass loss of 0.1 to 1.0%. The Ni-containing powder has a Ni content of not less than 40% and passes a 45 &mgr;m-mesh sieve at a proportion of not less than 90%. The iron alloy powder and the iron powder have a martensite structure or a tempered martensite structure.Type: ApplicationFiled: June 26, 2003Publication date: January 15, 2004Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hitoshi Sakuma, Kenji Kawai, Yoshikazu Seki, Masaaki Matsubara, Yasuko Yakou, Koji Yamamoto
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Patent number: 6544352Abstract: Disclosed is a method for the compaction of a soft magnetic powder capable of manufacturing a green compact which has attained high density and high strength, is excellent in mechanical properties and magnetic properties, and does not cause a reduction in electrical resistance. Soft magnetic powder particles individually surface-coated with an insulating vitreous layer containing P, Mg, B, and Fe as essential components are used, and a lubricant is applied to the inner wall surface of a compaction die. The soft magnetic powder is subjected to compaction at from not less than room temperature to less than 50° C. without mixing the lubricant with the soft magnetic powder, followed by annealing at from 50 to 300° C.Type: GrantFiled: June 1, 2001Date of Patent: April 8, 2003Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiroyuki Mitani, Takehiro Tsuchida, Yuichi Seki, Akihiko Kagawa, Tetsuya Sawayama, Yoshikazu Seki, Masaaki Sato
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Publication number: 20030047706Abstract: A mixed powder useful as a starting material for dust core comprises a uniform mixture of a soft magnetic powder and a binder resin so that the resultant dust core has an electric resistance capable of suppressing an eddy current between the soft magnetic powdery particles and high mechanical strength at room temperatures and also at high temperatures. In the mixed powder, the binder resin is made of a phenolic resin powder which has a methylol groups in the molecule and preferably has an average particle size of 30 &mgr;m or below and wherein when the phenolic resin powder is dissolved in boiling methanol in large excess, a content of an undissolved matter is at least 4 wt % based on the total of the phenolic resin. A dust core obtained from the mixed powder and its fabrication method are also described.Type: ApplicationFiled: March 19, 2002Publication date: March 13, 2003Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)Inventors: Hiroyuki Mitani, Tsukasa Yuri, Kazuhisa Fujisawa, Yoshikazu Seki, Masahiro Murakami, Hirofumi Houjou
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Publication number: 20030037833Abstract: Disclosed is a powder filling method in which powder is filled in a powder box having a discharging port at its bottom segment, the powder box is moved over a cavity to be targeted while being slid on a die plate, thereafter the powder in the powder box is dropped into the cavity by its own gravitational force and filled there, wherein the powder in the powder box is applied with a mechanical agitation when the powder in the powder box is at least dropped into the cavity in the powder filling method for filling the powder in the powder box while being dropped at least into the cavity.Type: ApplicationFiled: July 30, 2002Publication date: February 27, 2003Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yasuhiro Hashimoto, Yoshikazu Seki, Masahiro Murakami
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Publication number: 20020189714Abstract: Disclosed is a method for the compaction of a soft magnetic powder capable of manufacturing a green compact which has attained high density and high strength, is excellent in mechanical properties and magnetic properties and does not cause a reduction in electrical resistance. Soft magnetic powder particles individually surface-coated with an insulating vitreous layer containing P, Mg, B, and Fe as essential components are used, and a lubricant is applied to the inner wall surface of a compaction die. The soft magnetic powder is subjected to compaction at from not less than room temperature to less than 50° C. without mixing the lubricant with the soft magnetic powder, followed by annealing at from 50 to 300° C..Type: ApplicationFiled: June 1, 2001Publication date: December 19, 2002Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiroyuki Mitani, Takehiro Tsuchida, Yuichi Seki, Akihiko Kagawa, Tetsuya Sawayama, Yoshikazu Seki, Masaaki Sato
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Patent number: 6391083Abstract: A mixture for a powder metallurgy product, including iron powder, graphite powder and copper (Cu) of about 3.0 to about 5.0 weight percent. Iron powder includes iron grains which contain MnS therein. The mixture contains the MnS of about 0.65 to about 1.40 weight percent. The graphite powder is contained in the mixture such that an amount of carbon (C) in the powder metallurgy product is about 0.3 to about 0.7 weight percent. An amount (wt % C) of the carbon and an amount (wt % Cu) of the copper is determined to obtain a target fatigue strength FS (MPa) and a target hardness HR (HRB) based on a relation FS=66.63×(wt % C)+22.61×(wt % Cu)+280.84 HR=22.96×(wt % C)+2.99×(wt % Cu)+78.91.Type: GrantFiled: November 9, 2000Date of Patent: May 21, 2002Assignees: Kobeico Metal Powder of America, Inc., Kobe Steel, Ltd., Honda Giken Kogyo Kabushiki KaishaInventors: Nobuaki Akagi, Shinya Kawai, Masaaki Satoh, Yoshikazu Seki, Masaki Amano, Hideaki Ushio, Russell T. Scott
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Patent number: 6344169Abstract: A method for compacting powders for powder metallurgy comprises packing powders for powder metallurgy formulated with a lubricant in a compacting die applied with a lubricant on inner wall surfaces thereof, and subjecting the powders to warm or hot compaction. The powders contain the lubricant in an amount up to 0.2 wt %, non-inclusive of 0%, based on the total of the powders and the lubricant.Type: GrantFiled: November 3, 1999Date of Patent: February 5, 2002Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Takehiro Tsuchida, Hiroshi Yaguchi, Tetsuya Sawayama, Masaaki Sato, Yoshikazu Seki, Nobuaki Akagi
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Patent number: 5799533Abstract: A distributed pressure sensor is constructed such that a wire-like electrode member is arranged in the vertical (row) direction so that electrode surfaces alternately appear on the surface and the rear surface of a sheet-shaped pressure sensitive electrically conductive material, and moreover, a wire-like electrode is arranged also in the lateral (line) direction at right angles to the vertical (row) direction, and intersections defined by the electrode members arranged in the vertical direction and the lateral direction are located such that the pressure sensitive electrically conductive material is sandwiched from both the surfaces. The distributed pressure sensor has high flexibility and exhibits improved durability to repeated bending.Type: GrantFiled: March 27, 1996Date of Patent: September 1, 1998Assignee: Director-General of Agency of Industrial Science and TechnologyInventors: Yoshikazu Seki, Makoto Shimojo, Sigeru Sato