Patents by Inventor Shinji Yoshihara

Shinji Yoshihara 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).

  • Patent number: 10487383
    Abstract: The stress corrosion cracking resistance of an aluminum alloy member consisting of 7000-series aluminum alloy extruded shape is improved. At least one region of a quenched aluminum alloy extruded shape is subjected to a restoring treatment of heating at a temperature-raising rate of 0.4° C./second or more, holding at a temperature ranging 300 to 590° C. for a time longer than zero second and cooling at a cooling rate of 0.5° C./second or more. A plastic working is applied to the region within 72 hours. The region is subjected to a heat treatment of heating at a temperature-raising rate of 0.4° C./second or more, holding at a temperature ranging 300 to 590° C. for a time longer than zero second and not longer than 300 seconds and cooling at a cooling rate of 2000° C./minute or less. The whole of the aluminum alloy extruded shape is subjected to an artificial aging treatment.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: November 26, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Takahiro Shikama, Shinji Yoshihara
  • Publication number: 20190353149
    Abstract: A swash-plate-type variable displacement compressor is provided with a rotationally-driven drive shaft, a lug plate integrally fixed to the drive shaft, a swash plate fixed in a manner capable of being variably inclined to the drive shaft, a link mechanism for coupling the lug plate and the swash plate while permitting the variable inclination; and an actuator which is arranged between the lug plate and the swash plate and which uses pressure to change an inclination angle of the swash plate. The actuator has a cylindrical member which extends from a surface of the lug plate toward the swash plate, a bottomed cylindrical member fitted capable of being relatively displaceable to an outer peripheral surface of the cylindrical member, and a coil spring which is arranged in an inner space of the actuator, and which biases the bottomed cylindrical member in a direction which is away from the lug plate.
    Type: Application
    Filed: November 13, 2017
    Publication date: November 21, 2019
    Inventors: Shinji NAKAMURA, Toru YOSHIHARA
  • Publication number: 20190078180
    Abstract: To obtain an Al—Mg—Si based aluminum alloy extruded material with a smooth surface and no burning without inhibiting the productivity. An aluminum alloy billet includes: Si: 2.0 to 6.0% by mass; Mg: 0.3 to 1.2% by mass; and Ti: 0.01 to 0.2% by mass, a Fe content being restricted to 0.2% or less by mass, with the balance being Al and inevitable impurities. The aluminum alloy billet is subjected to a homogenization treatment by keeping at 500 to 550° C. for 4 to 15 hours. The billet is forcibly cooled to 250° C. or lower at an average cooling rate of 50° C./hr or higher. Then, the billet is subjected to hot-extruding at an extrusion rate of 3 to 10 m/min by being heating at 450 to 500° C. The extruded material is forcibly cooled at an average cooling rate of 50° C./sec or higher and then subjected to an aging treatment. The extruded material can be manufactured that has its surface having a ten-point average roughness Rz of 80 ?m or less.
    Type: Application
    Filed: November 13, 2018
    Publication date: March 14, 2019
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yukimasa Miyata, Shinji Yoshihara, Takahiro Shikama
  • Publication number: 20180347022
    Abstract: The stress corrosion cracking resistance of an aluminum alloy member consisting of 7000-series aluminum alloy extruded shape is improved. At least one region of a quenched aluminum alloy extruded shape is subjected to a restoring treatment of heating at a temperature-raising rate of 0.4° C./second or more, holding at a temperature ranging 300 to 590° C. for a time longer than zero second and cooling at a cooling rate of 0.5° C./second or more. A plastic working is applied to the region within 72 hours. The region is subjected to a heat treatment of heating at a temperature-raising rate of 0.4° C./second or more, holding at a temperature ranging 300 to 590° C. for a time longer than zero second and not longer than 300 seconds and cooling at a cooling rate of 2000° C./minute or less. The whole of the aluminum alloy extruded shape is subjected to an artificial aging treatment.
    Type: Application
    Filed: August 13, 2018
    Publication date: December 6, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takahiro SHIKAMA, Shinji YOSHIHARA
  • Patent number: 9657374
    Abstract: To obtain an Al—Mg—Si based aluminum alloy extruded material with a smooth surface and no burning without inhibiting the productivity. An aluminum alloy billet includes: Si: 2.0 to 6.0% by mass; Mg: 0.3 to 1.2% by mass; and Ti: 0.01 to 0.2% by mass, a Fe content being restricted to 0.2% or less by mass, with the balance being Al and inevitable impurities. The aluminum alloy billet is subjected to a homogenization treatment by keeping at 500 to 550° C. for 4 to 15 hours. The billet is forcibly cooled to 250° C. or lower at an average cooling rate of 50° C./hr or higher. Then, the billet is subjected to hot-extruding at an extrusion rate of 3 to 10 m/min by being heating at 450 to 500° C. The extruded material is forcibly cooled at an average cooling rate of 50° C./sec or higher and then subjected to an aging treatment. The extruded material can be manufactured that has its surface having a ten-point average roughness Rz of 80 ?m or less.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: May 23, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Yukimasa Miyata, Shinji Yoshihara, Takahiro Shikama
  • Patent number: 9551054
    Abstract: An aluminum alloy member resistant to cracking and having high strengths and excellent stress corrosion cracking resistance is manufactured by expanding a 7xxx aluminum alloy hollow extrusion at a rate of 5% or more. Specifically, a 7xxx aluminum alloy hollow extrusion containing Zn of 3.0-9.5%, Mg of 0.4-2.5%, Cu of 0.05-2.0%, and Ti of 0.005-0.2%, in mass percent, and prepared through press quenching is subjected to a reversion treatment, to pipe expansion within 72 hours after the reversion treatment, and to temper aging. The reversion treatment includes heating at a temperature rise rate of 0.4° C./second or more, holding in a temperature range of 200-550° C. for longer than 0 second, and cooling at a rate of 0.5° C./second or more. The ratio Y (?rs/?0.2) of the tensile residual stress ?rs to the 0.2% yield stress ?0.2 after temper aging and the total content X of Mg and Zn satisfy Expression (1): Y??0.1X+1.4 ??(1).
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: January 24, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Takahiro Shikama, Shinji Yoshihara
  • Publication number: 20160333445
    Abstract: To obtain an Al—Mg—Si based aluminum alloy extruded material with a smooth surface and no burning without inhibiting the productivity. An aluminum alloy billet includes: Si: 2.0 to 6.0% by mass; Mg: 0.3 to 1.2% by mass; and Ti: 0.01 to 0.2% by mass, a Fe content being restricted to 0.2% or less by mass, with the balance being Al and inevitable impurities. The aluminum alloy billet is subjected to a homogenization treatment by keeping at 500 to 550° C. for 4 to 15 hours. The billet is forcibly cooled to 250° C. or lower at an average cooling rate of 50° C./hr or higher. Then, the billet is subjected to hot-extruding at an extrusion rate of 3 to 10 m/min by being heating at 450 to 500° C. The extruded material is forcibly cooled at an average cooling rate of 50° C./sec or higher and then subjected to an aging treatment. The extruded material can be manufactured that has its surface having a ten-point average roughness Rz of 80 ?m or less.
    Type: Application
    Filed: July 28, 2016
    Publication date: November 17, 2016
    Applicant: Kabushiki Kaisha Kobe Siko Sho (Kobe Steel, Ltd.)
    Inventors: Yukimasa MIYATA, Shinji YOSHIHARA, Takahiro SHIKAMA
  • Publication number: 20160237540
    Abstract: The stress corrosion cracking resistance of an aluminum alloy member consisting of 7000-series aluminum alloy extruded shape is improved. At least one region of a quenched aluminum alloy extruded shape is subjected to a restoring treatment of heating at a temperature-raising rate of 0.4° C./second or more, holding at a temperature ranging 300 to 590° C. for a time longer than zero second and cooling at a cooling rate of 0.5° C./second or more. A plastic working is applied to the region within 72 hours. The region is subjected to a heat treatment of heating at a temperature-raising rate of 0.4° C./second or more, holding at a temperature ranging 300 to 590° C. for a time longer than zero second and not longer than 300 seconds and cooling at a cooling rate of 2000° C./minute or less. The whole of the aluminum alloy extruded shape is subjected to an artificial aging treatment.
    Type: Application
    Filed: December 28, 2015
    Publication date: August 18, 2016
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takahiro SHIKAMA, Shinji YOSHIHARA
  • Publication number: 20160208368
    Abstract: To obtain an Al—Mg—Si based aluminum alloy extruded material with a smooth surface and no burning without inhibiting the productivity. An aluminum alloy billet includes: Si: 2.0 to 6.0% by mass; Mg: 0.3 to 1.2% by mass; and Ti: 0.01 to 0.2% by mass, a Fe content being restricted to 0.2% or less by mass, with the balance being Al and inevitable impurities. The aluminum alloy billet is subjected to a homogenization treatment by keeping at 500 to 550° C. for 4 to 15 hours. The billet is forcibly cooled to 250° C. or lower at an average cooling rate of 50° C./hr or higher. Then, the billet is subjected to hot-extruding at an extrusion rate of 3 to 10 m/min by being heating at 450 to 500° C. The extruded material is forcibly cooled at an average cooling rate of 50° C./sec or higher and then subjected to an aging treatment. The extruded material can be manufactured that has its surface having a ten-point average roughness Rz of 80 ?m or less.
    Type: Application
    Filed: August 28, 2014
    Publication date: July 21, 2016
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yukimasa MIYATA, Shinji YOSHIHARA, Takahiro SHIKAMA
  • Patent number: 9206496
    Abstract: A 7000-series aluminum alloy hollow extruded material formed by porthole extrusion contains Zn: 3.0 to 8.0 mass %, Mg: 0.4 to 2.0 mass %, Cu: 0.05 to 2.0 mass %, Si: 0.3 mass % or less, Fe: 0.35 mass % or less, and one or more of Mn, Cr, and Zr: 0.10 mass % or less in total, with the balance being Al and unavoidable impurities. The aluminum alloy hollow extruded material has a recrystallized structure throughout the cross-section. In the case of pipe expansion by electro-magnetic forming, excellent pipe expansion formability is obtained.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: December 8, 2015
    Assignee: KOBE STEEL, LTD.
    Inventors: Takahiro Shikama, Shinji Yoshihara
  • Patent number: 8876993
    Abstract: A casted ingot of a heat treatment type Al—Zn—Mg series aluminum alloy comprising Zn: 4.0-8.0% by mass, Mg: 0.5-2.0% by mass, Cu: 0.05-0.5% by mass, Ti: 0.01-0.1% by mass, and any one or more of Mn: 0.1-0.7% by mass, Cr: 0.1-0.5% by mass and Zr: 0.05-0.3% by mass, and the balance being aluminum and incidental impurities is extruded at a homogenization treatment temperature after a homogenization treatment without cooled, and a resulted extruded material is die quenched at a cooling rate equal to or more than 100° C./min and then subjected to an artificial aging treatment, wherein the homogenization treatment is carried out by heating to the homogenization treatment temperature as 430-500° C. at a heating rate less than 750° C./hr or by heating to the homogenization treatment temperature and held the homogenization treatment temperature for 3 hours.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: November 4, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Yukimasa Miyata, Shinji Yoshihara, Minwoo Kang
  • Publication number: 20140209222
    Abstract: An aluminum alloy member resistant to cracking and having high strengths and excellent stress corrosion cracking resistance is manufactured by expanding a 7xxx aluminum alloy hollow extrusion at a rate of 5% or more. Specifically, a 7xxx aluminum alloy hollow extrusion containing Zn of 3.0-9.5%, Mg of 0.4-2.5%, Cu of 0.05-2.0%, and Ti of 0.005-0.2%, in mass percent, and prepared through press quenching is subjected to a reversion treatment, to pipe expansion within 72 hours after the reversion treatment, and to temper aging. The reversion treatment includes heating at a temperature rise rate of 0.4° C./second or more, holding in a temperature range of 200-550° C. for longer than 0 second, and cooling at a rate of 0.5° C./second or more. The ratio Y (?rs/?0.2) of the tensile residual stress ?rs to the 0.2% yield stress ?0.2 after temper aging and the total content X of Mg and Zn satisfy Expression (1): Y??0.1X+1.
    Type: Application
    Filed: January 14, 2014
    Publication date: July 31, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takahiro SHIKAMA, Shinji Yoshihara
  • Patent number: 8610246
    Abstract: In a manufacturing method for a semiconductor device having a coil layer part on a substrate, two support substrates each having a flat surface are prepared, and a component member is formed on the flat surface of each of the support substrates. The component member includes a wiring portion having a predetermined pattern and an insulation film surrounding the wiring portion. The wiring portion is provided with a connecting portion exposing from the insulation film. A coil layer part is formed by opposing and bonding the component members formed on the support substrates to each other while applying pressure in a condition where the flat surfaces of the support substrates are parallel to each other. A coil is formed in the coil layer part by connecting the wiring portions through the connecting portions.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: December 17, 2013
    Assignee: DENSO CORPORATION
    Inventors: Shinji Yoshihara, Kazushi Asami, Yasuhiro Kitamura, Junji Oohara
  • Publication number: 20130146183
    Abstract: An aluminum alloy extruded material in relation with the present invention is with high strength by die quench air cooling and excellent in SCC resistance. The aluminum alloy extruded material is an Al—Zn—Mg-based aluminum alloy extruded material for structural member for automobiles such as a bumper reinforce, a door guard bar and the like which satisfies three expressions of 5.0?[Zn]7.0, [Zn]/5.38<[Mg]?[Zn]/5.38+0.7, and [Zn]+4.7[Mg]?14, where [Mg] represents mass % of Mg and [Zn] represents mass % of Zn, and contains at least either one element of Cu: 0.1-0.6 mass % and Ag: 0.01-0.15 mass %, Ti: 0.005-0.05 mass %, and at least one element out of Mn: 0.1-0.3 mass %, Cr: 0.05-0.2 mass %, Zr: 0.05-0.2 mass %.
    Type: Application
    Filed: December 12, 2011
    Publication date: June 13, 2013
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yukimasa MIYATA, Shinji Yoshihara
  • Publication number: 20120234440
    Abstract: A casted ingot of a heat treatment type Al—Zn—Mg series aluminum alloy comprising Zn: 4.0-8.0% by mass, Mg: 0.5-2.0% by mass, Cu: 0.05-0.5% by mass, Ti: 0.01-0.1% by mass, and any one or more of Mn: 0.1-0.7% by mass, Cr: 0.1-0.5% by mass and Zr: 0.05-0.3% by mass, and the balance being aluminum and incidental impurities is extruded at a homogenization treatment temperature after a homogenization treatment without cooled, and a resulted extruded material is die quenched at a cooling rate equal to or more than 100° C./min and then subjected to an artificial aging treatment, wherein the homogenization treatment is carried out by heating to the homogenization treatment temperature as 430-500° C. at a heating rate less than 750° C./hr or by heating to the homogenization treatment temperature and held the homogenization treatment temperature for 3 hours.
    Type: Application
    Filed: March 14, 2012
    Publication date: September 20, 2012
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Yukimasa MIYATA, Shinji Yoshihara, Minwoo Kang
  • Publication number: 20110247736
    Abstract: An extruded member of Al—M13 Si aluminum alloy specially composed of Mg, Si, Fe, Cu, Zn, Ti, etc. which has the equiaxed re-crystallized grain structure in which intergranular precipitates 1 ?m or larger are separate from one another at large average intervals and there are many cube orientations over the entire thickness region thereof so that it excels in both flexural crushing performance and corrosion resistance. The extruded member is suitable for use as automotive body reinforcement members which need outstanding lateral crushing performance under severe collision conditions as well as good corrosion resistance.
    Type: Application
    Filed: June 3, 2011
    Publication date: October 13, 2011
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO
    Inventors: Keiji MORITA, Shinji Yoshihara, Manabu Nakai, Shigenobu Yasunaga
  • Publication number: 20110248380
    Abstract: In a manufacturing method for a semiconductor device having a coil layer part on a substrate, two support substrates each having a flat surface are prepared, and a component member is formed on the flat surface of each of the support substrates. The component member includes a wiring portion having a predetermined pattern and an insulation film surrounding the wiring portion. The wiring portion is provided with a connecting portion exposing from the insulation film. A coil layer part is formed by opposing and bonding the component members formed on the support substrates to each other while applying pressure in a condition where the flat surfaces of the support substrates are parallel to each other. A coil is formed in the coil layer part by connecting the wiring portions through the connecting portions.
    Type: Application
    Filed: April 11, 2011
    Publication date: October 13, 2011
    Applicant: DENSO CORPORATION
    Inventors: Shinji YOSHIHARA, Kazushi Asami, Yasuhiro Kitamura, Junji Oohara
  • Publication number: 20090242087
    Abstract: An extruded member of Al—Mg—Si aluminum alloy specially composed of Mg, Si, Fe, Cu, Zn, Ti, etc. which has the equiaxed re-crystallized grain structure in which intergranular precipitates 1 ?m or lager are separate from one another at large average intervals and there are many cube orientations over the entire thickness region thereof so that it excels in both flexural crushing performance and corrosion resistance. The extruded member is suitable for use as automotive body reinforcement members which need outstanding lateral crushing performance under severe collision conditions as well as good corrosion resistance.
    Type: Application
    Filed: March 3, 2009
    Publication date: October 1, 2009
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.)
    Inventors: Keiji Morita, Shinji Yoshihara, Manabu Nakai, Shigenobu Yasunaga
  • Patent number: 7174072
    Abstract: An optical device includes: a silicon substrate; a plurality of silicon oxide columns having a rectangular plan shape; and a cavity disposed between the columns. Each column has a lower portion disposed on the substrate. Each column has a width defined as W1. The cavity has a width defined as W2. A ratio of W1/W2 becomes smaller as it goes to the lower portion of the column. A core layer provided by the columns and the cavity can have the thickness equal to or larger than a few dozen ?m easily. Therefore, connection loss between a light source and the device is reduced.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: February 6, 2007
    Assignee: Denso Corporation
    Inventors: Junji Oohara, Shinji Yoshihara, Yukihiro Takeuchi
  • Patent number: 7091109
    Abstract: A protective sheet is fixed to a jig, and regions of the protective sheet corresponding to regions where dicing-cut is to be performed are removed to form grooves. Then, a semiconductor wafer is bonded to the protective sheet at an opposite side of the jig, and the jig is detached from the protective sheet and the semiconductor wafer bonded together. After that, the semiconductor wafer is cut into semiconductor chips by dicing along the grooves of the protective sheet. Because the protective sheet is not cut by dicing, no scraps of the protective sheet is produced, thereby preventing contamination to the chips.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: August 15, 2006
    Assignee: Denso Corporation
    Inventors: Tetsuo Fujii, Hiroshi Muto, Shinji Yoshihara, Sumitomo Inomata