Patents by Inventor Takahiko Nagaya
Takahiko Nagaya 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: 8474518Abstract: A tank body 125 comprising header tanks 120 of a radiator is composed with a polyamide composition containing polyamide 6,10, glass fiber, copper and nucleating agent. At this time, the polyamide composition contains, based on the total weight of the polyamide 6,10, the glass fiber, the copper and the nucleating agent, (a) 48.9 to 79.988 percent by weight of the polyamide 6,10, (b) 20 to 50 percent by weight of the glass fiber, (c) 0.002 to 0.1 percent by weight of the copper, and (d) 0.01 to 1.5 percent by weight of the nucleating agent, and the result of measuring half-crystallization time of the polyamide composition is 5 minutes or less. In addition, the polyamide 6,10 used has a relative viscosity, as measured in 98 percent sulfuric acid, of 2.3 to 2.9.Type: GrantFiled: March 19, 2008Date of Patent: July 2, 2013Assignee: Denso CorporationInventors: Shinya Goto, Takahiko Nagaya, Masahiro Nozaki
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Patent number: 8227091Abstract: Disclosed is an aluminum alloy brazing sheet for heat exchangers, which has high strength after brazing, high corrosion resistance and excellent brazability. Specifically disclosed is an aluminum alloy brazing sheet (1a) for heat exchangers comprising a core member (2), a sacrificial member (3) formed on one side of the core member (2), and a brazing filler metal (4) formed on the other side of the core member (2) and composed of an Al—Si alloy. The sacrificial member (3) contains 0.03-0.30% by mass of Fe, 0.01-0.40% by mass of Mn, 0.4-1.4% by mass of Si, 2.0-5.5% by mass of Zn, not more than 0.05% by mass of Mg and the balance of Al and unavoidable impurities. In addition, the sacrificial member (3) has a crystal grain size of 100-400 & mgr;m after 5-minute heat treatment at 600 & ring;C during the brazing.Type: GrantFiled: December 18, 2007Date of Patent: July 24, 2012Assignees: Kobe Steel, Ltd., Denso CorporationInventors: Toshiki Ueda, Akihiro Tsuruno, Fumihiro Koshigoe, Keiichi Okazaki, Takahiko Nagaya, Kenji Negura
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Publication number: 20100116482Abstract: A tank body 125 comprising header tanks 120 of a radiator is composed with a polyamide composition containing polyamide 6,10, glass fiber, copper and nucleating agent. At this time, the polyamide composition contains, based on the total weight of the polyamide 6,10, the glass fiber, the copper and the nucleating agent,(a) 48.9 to 79.988 percent by weight of the polyamide 6,10, (b) 20 to 50 percent by weight of the glass fiber, (c) 0.002 to 0.1 percent by weight of the copper, and (d) 0.01 to 1.5 percent by weight of the nucleating agent, and the result of measuring half-crystallization time of the polyamide composition is 5 minutes or less. In addition, the polyamide 6,10 used has a relative viscosity, as measured in 98 percent sulfuric acid, of 2.3 to 2.9.Type: ApplicationFiled: March 19, 2008Publication date: May 13, 2010Inventors: Shinya Goto, Takahiko Nagaya, Masahiro Nozaki
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Publication number: 20100112370Abstract: Disclosed is an aluminum alloy brazing sheet for heat exchangers, which has high strength after brazing, high corrosion resistance and excellent brazability. Specifically disclosed is an aluminum alloy brazing sheet (1a) for heat exchangers comprising a core member (2), a sacrificial member (3) formed on one side of the core member (2), and a brazing filler metal (4) formed on the other side of the core member (2) and composed of an Al—Si alloy. The sacrificial member (3) contains 0.03-0.30% by mass of Fe, 0.01-0.40% by mass of Mn, 0.4-1.4% by mass of Si, 2.0-5.5% by mass of Zn, not more than 0.05% by mass of Mg and the balance of Al and unavoidable impurities. In addition, the sacrificial member (3) has a crystal grain size of 100-400 & mgr;m after 5-minute heat treatment at 600 & ring;C during the brazing.Type: ApplicationFiled: December 18, 2007Publication date: May 6, 2010Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), DENSO CORPORATIONInventors: Toshiki Ueda, Akihiro Tsuruno, Fumihiro Koshigoe, Keiichi Okazaki, Takahiko Nagaya, Kenji Negura
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Patent number: 6620274Abstract: A partly damaged aluminum heat exchanger such as an aluminum radiator is repaired by closing a hole in the damaged portion with an acrylic resin adhesive material. A certain area around the damaged portion is pressed down to form a cup-shaped depressed portion. The adhesive material is supplied to the depressed portion so that it is retained therein. Then, the adhesive material is hardened by curing it under the room temperature. The hardened adhesive material completely closes the hole with a sufficient thickness and strength because it is retained in the depressed portion. The adhesive material is cured in a relatively short time because the acrylic resin is used as the adhesive material.Type: GrantFiled: August 16, 2000Date of Patent: September 16, 2003Assignee: Denso CorporationInventors: Takahiko Nagaya, Sunao Fukuda, Yoshifumi Suzuki
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Patent number: 6403232Abstract: A core material of an aluminum brazing sheet restricts Mg to less than 0.3 wt % and Fe to not more than 0.2 wt %, and contains more than 0.2 wt % and not more than 1.0 wt % of Cu, 0.3 to 1.3 wt % of Si, 0.3 to 1.5 wt % of Mn and the balance of Al and inevitable impurities. A brazing filler material is formed on one surface of the core material by Al—Si based aluminum alloy. Also, a cladding material is formed on the other surface of the core material, and contains less than 0.2 wt % of Si, 2.0 to 3.5 wt % of Mg, not less than 0.5 wt % and less than 2.0 wt % of Zn and the balance of Al and inevitable impurities. Further, the value (cladding material hardness)/(the core material hardness) that is a ratio of the hardness of the cladding material to the hardness of the core material is not more than 1.5.Type: GrantFiled: July 25, 2001Date of Patent: June 11, 2002Assignees: Kobe Alcoa Transportation Products Ltd., Denso CorporationInventors: Tadashi Okamoto, Osamu Takezoe, Takahiko Nagaya, Yasuaki Isobe, Taketoshi Toyama, Sunao Fukuda
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Publication number: 20020034653Abstract: A core material of an aluminum brazing sheet restricts Mg to less than 0.3 wt. % and Fe to not more than 0.2 wt. %, and contains more than 0.2 wt. % and not more than 1.0 wt. % of Cu, 0.3 to 1.3 wt. % of Si, 0.3 to 1.5 wt. % of Mn and the balance of Al and inevitable impurities. A brazing filler material is formed on one surface of the core material by Al-Si based aluminum alloy. Also, a cladding material is formed on the other surface of the core material, and contains less than 0.2 wt. % of Si, 2.0 to 3.5 wt. % of Mg, not less than 0.5 wt. % and less than 2.0 wt. % of Zn and the balance of Al and inevitable impurities. Further, the value (cladding material hardness)/(the core material hardness) that is a ratio of the hardness of the cladding material to the hardness of the core material is not more than 1.5.Type: ApplicationFiled: July 25, 2001Publication date: March 21, 2002Applicant: KOBE ALCOA TRANSPORTATION PRODUCTS LTD.Inventors: Tadashi Okamoto, Osamu Takezoe, Takahiko Nagaya, Yasuaki Isobe, Taketoshi Toyama, Sunao Fukuda