Patents by Inventor Yoshito Oki
Yoshito Oki 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: 8784582Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, erosion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.Type: GrantFiled: June 25, 2012Date of Patent: July 22, 2014Assignee: Nippon Light Metal Company, Ltd.Inventors: Hideki Suzuki, Yoshito Oki, Tomohiro Sasaki, Masae Nagasawa
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Publication number: 20120261037Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, erosion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.Type: ApplicationFiled: June 25, 2012Publication date: October 18, 2012Applicant: Nippon Light Metal Company, Ltd.Inventors: Hideki Suzuki, Yoshito Oki, Tomohiro Sasaki, Masae Nagasawa
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Patent number: 8226781Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, elusion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.Type: GrantFiled: August 11, 2011Date of Patent: July 24, 2012Assignee: Nippon Light Metal Company, Ltd.Inventors: Hideki Suzuki, Yoshito Oki, Tomohiro Sasaki, Masae Nagasawa
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Patent number: 8142575Abstract: [PROBLEMS] To provide an aluminum alloy fin material for a heat exchanger, which has high strength and high heat conductivity after brazing, and is excellent in the resistance to sagging, erosion and self-corrosion and the in the sacrificial anode effect. [MEANS FOR SOLVING PROBLEMS] A method for producing an aluminum alloy fin material for a heat exchanger which comprises providing a molten aluminum alloy having a chemical composition, in wt %, that Si: 0.5 to 1.5%, Fe: 0.15 to 1.00%, Mn: 0.8 to 3.0%, Zn: 0.5 to 2.5%, with the proviso that the content of Mg as an impurity is limited to 0.05 wt % or less, and the balance: Al and inevitable impurities, casting the molten alloy continuously into a thin slab having a thickness of 5 to 10 mm by the use of a twin belt casting machine, winding up the slab into a roll, cold-rolling the slab into a sheet having a thickness of 0.05 to 2.0 mm, subjecting the sheet to an inter annealing at 350 to 500° C.Type: GrantFiled: January 28, 2005Date of Patent: March 27, 2012Assignee: Nippon Light Metal Company, Ltd.Inventors: Yoshito Oki, Hideki Suzuki, Haruo Sugiyama, Toshiya Anami, Tomohiro Sasaki
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Patent number: 8110051Abstract: [PROBLEMS] To provide an aluminum alloy fin material for a heat exchanger, which has high strength and high heat conductivity after brazing, and is excellent in the resistance to sagging, erosion and self-corrosion and the in the sacrificial anode effect. [MEANS FOR SOLVING PROBLEMS] A method for producing an aluminum alloy fin material for a heat exchanger which comprises providing a molten aluminum alloy having a chemical composition, in wt %, that Si: 0.5 to 1.5%, Fe: 0.15 to 1.0%, Mn: 0.8 to 3.0%, Zn: 0.5 to 2.5%, with the proviso that the content of Mg as an impurity is limited to 0.05 wt % or less, and the balance: Al and inevitable impurities, casting the molten alloy continuously into a thin slab having a thickness of 5 to 10 mm by the use of a twin belt casting machine, winding up the slab into a roll, cold-rolling the slab into a sheet having a thickness of 0.05 to 2.0 mm, subjecting the sheet to an inter annealing at 350 to 500° C.Type: GrantFiled: June 19, 2009Date of Patent: February 7, 2012Assignee: Nippon Light Metal Company, Ltd.Inventors: Yoshito Oki, Hideki Suzuki, Haruo Sugiyama, Toshiya Anami, Tomohiro Sasaki
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Publication number: 20110293468Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, elusion resistance, sag resistance, sacrificial anodivation effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.Type: ApplicationFiled: August 11, 2011Publication date: December 1, 2011Inventors: Hideki Suzuki, Yoshito Oki, Tomohiro Sasaki, Masae Nagasawa
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Patent number: 7998288Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, erosion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.Type: GrantFiled: July 18, 2006Date of Patent: August 16, 2011Assignee: Nippon Light Metal Company, Ltd.Inventors: Hideki Suzuki, Yoshito Oki, Tomohiro Sasaki, Masae Nagasawa
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Publication number: 20100139899Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, erosion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.Type: ApplicationFiled: July 18, 2006Publication date: June 10, 2010Applicant: NPPON LIGHT METAL COMPANY, LTD.Inventors: Hideki Suzuki, Yoshito Oki, Tomohiro Sasaki, Masae Nagasawa
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Publication number: 20090260726Abstract: [PROBLEMS] To provide an aluminum alloy fin material for a heat exchanger, which has high strength and high heat conductivity after brazing, and is excellent in the resistance to sagging, erosion and self-corrosion and the in the sacrificial anode effect. [MEANS FOR SOLVING PROBLEMS] A method for producing an aluminum alloy fin material for a heat exchanger which comprises providing a molten aluminum alloy having a chemical composition, in wt %, that Si: 0.5 to 1.5%, Fe: 0.15 to 1.0%, Mn: 0.8 to 3.0%, Zn: 0.5 to 2.5%, with the proviso that the content of Mg as an impurity is limited to 0.05 wt % or less, and the balance: Al and inevitable impurities, casting the molten alloy continuously into a thin slab having a thickness of 5 to 10 mm by the use of a twin belt casting machine, winding up the slab into a roll, cold-rolling the slab into a sheet having a thickness of 0.05 to 2.0 mm, subjecting the sheet to an inter annealing at 350 to 500° C.Type: ApplicationFiled: June 19, 2009Publication date: October 22, 2009Applicant: NIPPON LIGHT METAL COMPANY, LTD.Inventors: Yoshito OKI, Hideki SUZUKI, Haruo SUGIYAMA, Toshiya ANAMI, Tomohiro SASAKI
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Publication number: 20070113936Abstract: [PROBLEMS] To provide an aluminum alloy fin material for a heat exchanger, which has high strength and high heat conductivity after brazing, and is excellent in the resistance to sagging, erosion and self-corrosion and the in the sacrificial anode effect. [MEANS FOR SOLVING PROBLEMS] A method for producing an aluminum alloy fin material for a heat exchanger which comprises providing a molten aluminum alloy having a chemical composition, in wt %, that Si: 0.5 to 1.5%, Fe: 0.15 to 1.00%, Mn: 0.8 to 3.0%, Zn: 0.5 to 2.5%, with the proviso that the content of Mg as an impurity is limited to 0.05 wt % or less, and the balance: Al and inevitable impurities, casting the molten alloy continuously into a thin slab having a thickness of 5 to 10 mm by the use of a twin belt casting machine, winding up the slab into a roll, cold-rolling the slab into a sheet having a thickness of 0.05 to 2.0 mm, subjecting the sheet to an inter annealing at 350 to 500® C.Type: ApplicationFiled: January 28, 2005Publication date: May 24, 2007Applicant: Nippon Light Metal Company,LtdInventors: Yoshito Oki, Hideki Suzuki, Haruo Sugiyama, Toshiya Anami, Tomohiro Sasaki
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Patent number: 6592688Abstract: An improved aluminum alloy fin stock is described having both a high strength and a high thermal conductivity. The fin stock contains 1.2-1.8% Fe, 0.7-0.95% Si, 0.3-0.5% Mn, 0.3-1.2% Zn and the balance Al, and is produced by continuously strip casting the alloy at a cooling rate greater than 10° C./sec. but less than 200° C./sec., hot rolling the strip to a re-roll sheet without homogenization, cold rolling the re-roll sheet to an intermediate gauge, annealing the sheet and cold rolling the sheet to final gauge. This fin stock has a conductivity after brazing of greater than 49.8% IACS.Type: GrantFiled: July 23, 1998Date of Patent: July 15, 2003Assignee: Alcan International LimitedInventors: Iljoon Jin, Jean-Pierre Martin, Willard Mark Truman Gallerneault, Toshiya Anami, Kevin Michael Gatenby, Ichiro Okamoto, Yoshito Oki
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Patent number: 6238497Abstract: A method of producing an aluminum alloy fin stock material, comprising the steps of continuously strip casting an aluminum finstock alloy to form an as-cast strip, rolling the as-cast strip to form a sheet article of intermediate gauge, annealing the sheet article of intermediate gauge, and cold rolling the annealed sheet article of intermediate gauge to produce an aluminum finstock material of final gauge. The steps are carried out on a finstock alloy which comprises the following elements in weight percent: Fe 1.6 to 2.4; Si 0.7 to 1.1; Mn 0.3 to 0.6; Zn 0.3 to 2.0; Ti 0.005 to 0.040; incidental elements less than 0.05 each, total no more than 0.15; and the balance aluminum. The invention also relates to the finstock material so-produced which has good thermal conductivity, and is suitable for use in thin gauge (e.g. less than 100 &mgr;m, and preferably 60±10 &mgr;m).Type: GrantFiled: January 21, 2000Date of Patent: May 29, 2001Assignee: Alcan International LimitedInventors: Iljoon Jin, Kevin Gatenby, Willard Mark Truman Gallerneault, Toshiya Anami, Yoshito Oki, Ichiro Okamoto
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Publication number: 20010001402Abstract: An improved aluminum alloy fin stock is described having both a high strength and a high thermal conductivity. The fin stock contains 1.2-1.8% Fe, 0.7-0.95% Si, 0.3-0.5% Mn, 0.3-1.2% Zn and the balance Al, and is produced by continuously strip casting the alloy at a cooling rate greater than 10° C./sec. but less than 200° C./sec., hot rolling the strip to a re-roll sheet without homogenization, cold rolling the re-roll sheet to an intermediate gauge, annealing the sheet and cold rolling the sheet to final gauge. This fin stock has a conductivity after brazing of greater than 49.8% IACS.Type: ApplicationFiled: July 23, 1998Publication date: May 24, 2001Applicant: Iljoon Jin Et AlInventors: IIJOON JIN, JEAN-PIERRE MARTIN, WILLARD MARK TRUMAN GALLERNEAULT, TOSHIYA ANAMI, KEVIN MICHAEL GATENBY, ICHIRO OKAMOTO, YOSHITO OKI
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Patent number: 6193140Abstract: By the use of a heat exchanger tube not required for adhesion of Zn in advance and a fin not clad with a brazing composition, a heat exchanger core is provided which has corrosion resistance and brazing capability comparable to or higher than those of the conventional counterpart. Applied onto an outer surface of an extruded flattened tube as a heat exchanger tube is a brazing composition derived from a mixture of silicon and fluorine type flux, and a fin formed of an aluminum-based zinc-containing material is prepared. The extruded flattened tube and the fin are then heated at a given temperature so that the same are brought into brazed relation to each other, and a mixed diffusion layer of silicon and zinc is then on the outer surface of the extruded flattened tube.Type: GrantFiled: July 13, 1999Date of Patent: February 27, 2001Assignee: Alcan International LimitedInventors: Toshihiro Suzuki, Tsunehiko Tanaka, Meitoku Ogasawara, Yoshito Oki
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Patent number: 6165291Abstract: An aluminum alloy fin stock of lower (more negative) corrosion potential and higher thermal conductivity is produced by a process, which comprises continuously strip casting the alloy to form a strip, cold rolling the strip to an intermediate gauge sheet, annealing the sheet and cold rolling the sheet to final gauge. Lower corrosion potential and higher thermal conductivity are imparted by carrying out the continuous strip casting while cooling the alloy at a rate of at least 300.degree. C./second, e.g. by conducting the casting step in a twin-roll caster.Type: GrantFiled: January 21, 2000Date of Patent: December 26, 2000Assignee: Alcan International LimitedInventors: Iljoon Jin, Kevin Gatenby, Toshiya Anami, Yoshito Oki