Patents by Inventor Narikazu Hashimoto
Narikazu Hashimoto 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: 20140209223Abstract: An aluminum alloy member resistant to cracking and having high strengths and excellent stress corrosion cracking resistance is manufactured by crushing a 7xxx aluminum alloy extrudate. Specifically, a 7xxx aluminum alloy extrudate containing Zn of 3.0-8.0%, 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 crushing within 72 hours after the reversion treatment, and then to aging. The reversion treatment includes heating at a temperature use 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 of the tensile residual stress ?rs to the 0.2% yield stress ?0.2 after aging and the total content X of Mg and Zn satisfy a condition specified by Expression (1): Y??0.1 X+1.Type: ApplicationFiled: December 18, 2013Publication date: July 31, 2014Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Narikazu HASHIMOTO, Takahiro SHIKAMA, Tsunetake TSUYOSHI
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Patent number: 8739909Abstract: A battery frame includes an outer frame (1) which has a generally rectangular shape in planar view and a lower plate (2) which is joined to the lower surface of the outer frame and made from an aluminum alloy. The outer frame (1) has a pair of frame members (3, 4) which have an identical shape and are respectively made of aluminum alloy hollow extruded material bent at 90° at two portions in the longitudinal direction and joined to each other so that the ends (3a) of one frame member (3) face the ends (4a) of the other frame member (4).Type: GrantFiled: March 20, 2012Date of Patent: June 3, 2014Assignee: Kobe Steel, Ltd.Inventors: Narikazu Hashimoto, Tsunetake Tsuyoshi
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Publication number: 20120247850Abstract: A buttery frame having an outer frame with a reduced component count and an eliminated or reduced welding distortion comprises an outer frame (1) which has a generally rectangular shape in planar view and a lower plate (2) which is jointed to the lower surface of the outer frame and made from an aluminum alloy, the outer frame (1) consisting a pair of frame members (3, 4) which have an identical shape, and the frame members (3, 4) are respectively made of the aluminum alloy hollow extruded material bended 90° at two portions in the longitudinal direction and jointed to each other so that the ends (3a) of one frame member (3) face to the ends (4a) of the other frame member (4).Type: ApplicationFiled: March 20, 2012Publication date: October 4, 2012Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)Inventors: Narikazu HASHIMOTO, Tsunetake TSUYOSHI
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Patent number: 7980615Abstract: A target tubular member with flange, such as a bumper stay, has a flange having an outer diameter larger than the diameter of an axial section and is formed by electromagnetic forming without excessive expansion. The tubular member with flange includes an axial member made of a tubular aluminum alloy extrudate and a flange member joined to an end of the axial member. The axial member has an end flange being integrated at its end and having an area smaller than that of the flange member. The flange member has a hole, and a cylindrical hole flange at the edge of the hole. The axial member fits in the hole of the flange member, the end flange is in intimate contact with the flange member, and the outer periphery of a small-diameter portion of the axial member is in intimate contact with the inner periphery of the hole flange. The hole flange is held between the end flange and a protrusion.Type: GrantFiled: December 30, 2009Date of Patent: July 19, 2011Assignee: Kobe Steel, Ltd.Inventors: Narikazu Hashimoto, Masatoshi Yoshida, Hiroyuki Yamashita, Satoshi Nimura, Toru Hashimura, Yoshihaya Imamura, Kazumori Horiguchi
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Patent number: 7896408Abstract: The bumper stay includes a cylindrical shaft member fit in to a hole of a bumper reinforce, a cylindrical reinforcing member fit in to the outer periphery of the shaft member in the rear side of the bumper reinforce, and a mounting flange member fit in to the outer periphery of the shaft member in its rear end. The shaft member is enlarged by electromagnetic forming and is tightly adhered to the inner peripheral surface of the hole formed in the bumper reinforce, the inner peripheral surface of the reinforcing member, and the inner peripheral surface of the hole flange formed in the mounting flange member, thereby these are joined with each other. Thin aluminum alloy extruded material can be used for the shaft member.Type: GrantFiled: March 11, 2009Date of Patent: March 1, 2011Assignee: Kobe Steel, Ltd.Inventors: Narikazu Hashimoto, Tsunetake Tsuyoshi, Hideki Ishitobi, Satoshi Nimura, Toru Hashimura
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Publication number: 20100102582Abstract: A target tubular member with flange, such as a bumper stay, has a flange having an outer diameter larger than the diameter of an axial section and is formed by electromagnetic forming without excessive expansion. The tubular member with flange includes an axial member made of a tubular aluminum alloy extrudate and a flange member joined to an end of the axial member. The axial member has an end flange being integrated at its end and having an area smaller than that of the flange member. The flange member has a hole, and a cylindrical hole flange at the edge of the hole. The axial member fits in the hole of the flange member, the end flange is in intimate contact with the flange member, and the outer periphery of a small-diameter portion of the axial member is in intimate contact with the inner periphery of the hole flange. The hole flange is held between the end flange and a protrusion.Type: ApplicationFiled: December 30, 2009Publication date: April 29, 2010Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Narikazu Hashimoto, Masatoshi Yoshida, Hiroyuki Yamashita, Satoshi Nimura, Toru Hashimura, Yoshihaya Imamura, Kazumori Horiguchi
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Patent number: 7658421Abstract: A target tubular member with flange, such as a bumper stay, has a flange having an outer diameter larger than the diameter of an axial section and is formed by electromagnetic forming without excessive expansion. The tubular member with flange includes an axial member made of a tubular aluminum alloy extrudate and a flange member joined to an end of the axial member. The axial member has an end flange being integrated at its end and having an area smaller than that of the flange member. The flange member has a hole, and a cylindrical hole flange at the edge of the hole. The axial member fits in the hole of the flange member, the end flange is in intimate contact with the flange member, and the outer periphery of a small-diameter portion of the axial member is in intimate contact with the inner periphery of the hole flange. The hole flange is held between the end flange and a protrusion.Type: GrantFiled: April 27, 2005Date of Patent: February 9, 2010Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Narikazu Hashimoto, Masatoshi Yoshida, Hiroyuki Yamashita, Satoshi Nimura, Toru Hashimura, Yoshihaya Imamura, Kazumori Horiguchi
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Publication number: 20090243314Abstract: The bumper stay includes a cylindrical shaft member fit in to a hole of a bumper reinforce, a cylindrical reinforcing member fit in to the outer periphery of the shaft member in the rear side of the bumper reinforce, and a mounting flange member fit in to the outer periphery of the shaft member in its rear end. The shaft member is enlarged by electromagnetic forming and is tightly adhered to the inner peripheral surface of the hole formed in the bumper reinforce, the inner peripheral surface of the reinforcing member, and the inner peripheral surface of the hole flange formed in the mounting flange member, thereby these are joined with each other. Thin aluminum alloy extruded material can be used for the shaft member.Type: ApplicationFiled: March 11, 2009Publication date: October 1, 2009Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd)Inventors: Narikazu Hashimoto, Tsunetake Tsuyoshi, Hideki Ishitobi, Satoshi Nimura, Toru Hashimura
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Publication number: 20060284432Abstract: A target tubular member with flange, such as a bumper stay, has a flange having an outer diameter larger than the diameter of an axial section and is formed by electromagnetic forming without excessive expansion. The tubular member with flange includes an axial member made of a tubular aluminum alloy extrudate and a flange member joined to an end of the axial member. The axial member has an end flange being integrated at its end and having an area smaller than that of the flange member. The flange member has a hole, and a cylindrical hole flange at the edge of the hole. The axial member fits in the hole of the flange member, the end flange is in intimate contact with the flange member, and the outer periphery of a small-diameter portion of the axial member is in intimate contact with the inner periphery of the hole flange. The hole flange is held between the end flange and a protrusion.Type: ApplicationFiled: April 27, 2005Publication date: December 21, 2006Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Narikazu Hashimoto, Masatoshi Yoshida, Hiroyuki Yamashita, Satoshi Nimura, Toru Hashimura, Yoshihaya Imamura, Kazumori Horiguchi
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Patent number: 6708626Abstract: A double-walled damping structure includes two parallel face plates 1 and 2, a plurality of ribs 3 and 4 extending in the same direction to connect the two parallel face plates 1 and 2, wherein in a section taken perpendicularly to the direction of extension of the ribs 3 and 4, all or most of the holes defined by the adjacent two ribs and the face plates are trapezoidal. The structure less transmits vibration, and is capable of further increasing a damping effect when a damping material is attached.Type: GrantFiled: June 4, 2002Date of Patent: March 23, 2004Assignee: Kobe Steel, Ltd.Inventors: Hiroki Ueda, Ichiro Yamagiwa, Akio Sugimoto, Toshimitsu Tanaka, Narikazu Hashimoto, Takashi Oka
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Publication number: 20030000417Abstract: A double-walled damping structure includes two parallel face plates 1 and 2, a plurality of ribs 3 and 4 extending in the same direction to connect the two parallel face plates 1 and 2, wherein in a section taken perpendicularly to the direction of extension of the ribs 3 and 4, all or most of the holes defined by the adjacent two ribs and the face plates are trapezoidal. The structure less transmits vibration, and is capable of further increasing a damping effect when a damping material is attached.Type: ApplicationFiled: June 4, 2002Publication date: January 2, 2003Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiroki Ueda, Ichiro Yamagiwa, Akio Sugimoto, Toshimitsu Tanaka, Narikazu Hashimoto, Takashi Oka
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Patent number: 6342112Abstract: An Al—Mg based alloy sheet product in which the crystallographic texture exhibits a ratio of the volume fraction of grains in the S orientation {123}<634> to the volume fraction of grains in the CUBE orientation {100}<001> (S/Cube) being 1 or more, and is comprised of grains with a volume fraction of about 10% or less in the GOSS orientation {110}<001>, wherein the grain size is in a range of about 20 to 100 &mgr;m demonstrates good formability.Type: GrantFiled: July 19, 2000Date of Patent: January 29, 2002Assignees: Alcoa Inc., Kobe Steel Ltd.Inventors: Frederic Barlat, John C. Brem, Shigeo Hattori, Yasuhiro Havashida, Daniel J. Lege, Kwansoo Chung, Yasushi Maeda, Kuniaki Matsui, Shawn J. Murtha, Masahiro Yanagawa, Narikazu Hashimoto
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Patent number: 6221182Abstract: By careful control of composition and processing, Al—Mg based alloy sheets with preferred grain sizes and crystallographic textures that result in good press formability are disclosed. The Al—Mg alloy preferably contains 2-6 wt % Mg, and at least 0.03 wt % of at least one element selected from Fe, Mn, Cr, Zr, and Cu. The crystallographic texture is comprised of grains with a volume fraction in a range of about 30-50% in the CUBE orientation {100}<001>, and a volume fraction in a range of about 10 to 20% in the BRASS orientation {110}<112>, wherein the grain size is within a range of about 50 to 100 &mgr;m.Type: GrantFiled: July 19, 2000Date of Patent: April 24, 2001Assignees: Alcoa Inc., Kobe Steel Ltd.Inventors: Frederic Barlat, John C. Brem, Shigeo Hattori, Yasuhiro Hayashida, Daniel J. Lege, Yasushi Maeda, Kuniaki Matsui, Shawn J. Murtha, Masahiro Yanagawa, Kwansoo Chung, Narikazu Hashimoto
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Patent number: 6117252Abstract: By careful control of composition and processing, Al--Mg based alloy sheets with preferred grain sizes and crystallographic textures that result in good press formability are disclosed. The Al--Mg alloy preferably contains 2-6 wt % Mg, and at least 0.03 wt % of at least one element selected from Fe, Mn, Cr, Zr, and Cu. The crystallographic texture is comprised of grains with a volume fraction in a range of about 5% to 20% in the CUBE orientation {100} <001>, a volume fraction in a range of about 1% to 5% in the GOSS orientation {110} <001>, a volume fraction in a range of about 1% to 10% in each of the BRASS orientation {110} <112>, S orientation {123} <634>, and COPPER orientation {112} <111>, wherein the grain size is in a range of about 20 to 70 .mu.m.Type: GrantFiled: August 26, 1999Date of Patent: September 12, 2000Assignee: Alcoa Inc.Inventors: Frederic Barlat, John C. Brem, Shigeo Hattori, Yasuhiro Hayashida, Daniel J. Lege, Yasushi Maeda, Kuniaki Matsui, Shawn J. Murtha, Masahiro Yanagawa, Kwansoo Chung, Narikazu Hashimoto
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Patent number: 6112851Abstract: In a partition wall panel of the present invention, a panel is formed by arranging a plurality of plates at an interval in the direction of the thickness of the plates and by joining the plates along at least part of the peripheries of the plates or/and at part of the surfaces of the plates using a joint member, and a plurality of such panels are integrated while arranged side by side through a plurality of air layers, and connected along at least part of the peripheries thereof or/and at part of the surfaces thereof using a connecting member. As a result of this construction, a thin, light-weight, and highly sound-insulating multi-layered panel structure can be provided.Type: GrantFiled: October 13, 1999Date of Patent: September 5, 2000Assignee: Kobe Steel, Ltd.Inventors: Akio Sugimoto, Narikazu Hashimoto, Shusei Arakane, Kenji Iwai, Tadayuki Minoura