Patents by Inventor Takahiro Fukuyama
Takahiro Fukuyama 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: 11246382Abstract: Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a ? phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a ? phase at a ratio of 10% or less.Type: GrantFiled: October 30, 2020Date of Patent: February 15, 2022Assignee: YKK CorporationInventors: Takanori Kumei, Atsushi Ogihara, Chikako Hiromi, Yoshio Taira, Muneyoshi Yokota, Takahiro Fukuyama, Kouta Kido
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Publication number: 20210045502Abstract: Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a ? phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a ? phase at a ratio of 10% or less.Type: ApplicationFiled: October 30, 2020Publication date: February 18, 2021Inventors: Takanori Kumei, Atsushi Ogihara, Chikako Hiromi, Yoshio Taira, Muneyoshi Yokota, Takahiro Fukuyama, Kouta Kido
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Patent number: 10918171Abstract: Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a ? phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a ? phase at a ratio of 10% or less.Type: GrantFiled: July 26, 2016Date of Patent: February 16, 2021Inventors: Takanori Kumei, Atsushi Ogihara, Chikako Hiromi, Yoshio Taira, Muneyoshi Yokota, Takahiro Fukuyama, Kouta Kido
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Patent number: 10786051Abstract: Elements for a slide fastener are provided, which have high strength and improved abrasion resistance. More particularly, an element for a slide fastener includes as a base material, an aluminum alloy having a composition represented by a general formula: AlaSibCucMgd in which a, b, c and d are expressed in percentage by mass, a denotes a balance, 0.4?b?0.9, 0.15?c?0.8, 0.8?d?2.0, and unavoidable impurity elements may be contained; and the aluminum alloy containing a precipitate containing Mg and Si.Type: GrantFiled: March 27, 2015Date of Patent: September 29, 2020Assignee: YKK CorporationInventors: Takahiro Fukuyama, Koichi Mikado, Yasuharu Yoshimura, Tetsuya Katsumi, Tatewaki Ido
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Patent number: 10760146Abstract: A copper alloy for fastening wherein the alloy has a structure of a mixture of ?-phase and a ?-phase; and wherein the alloy has a composition represented by the general formula: Cubal.ZnaMnb, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34?a?40.5, 0.1?b?6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b?(?8a+300)/7, where 34?a<37.5 and equation (2): b?(?5.5a+225.25)/5, where 35.5?a?40.5.Type: GrantFiled: August 9, 2012Date of Patent: September 1, 2020Assignee: YKK CorporationInventors: Kouta Kido, Takuya Koizumi, Yasuharu Yoshimura, Takahiro Fukuyama, Atsushi Ogihara, Kouichi Mikado, Jun Kiyohara, Yoshio Taira
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Publication number: 20190269207Abstract: Provided is a copper alloy fastener element which improves season cracking resistance by a means different from that of increasing a ratio of a ? phase. The copper alloy fastener element includes a copper-zinc alloy as a base material, the base material having: an apparent zinc content of from 34 to 38%; a dendrite structure; and a ? phase at a ratio of 10% or less.Type: ApplicationFiled: July 26, 2016Publication date: September 5, 2019Inventors: Takanori Kumei, Atsushi Ogihara, Chikako Hiromi, Yoshio Taira, Muneyoshi Yokota, Takahiro Fukuyama, Kouta Kido
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Patent number: 10161019Abstract: A metallic fastener member has a specific color of light gold and also has high strength, discoloration resistance and high workability to withstand practical use. A metallic fastener member including a base material of a copper alloy having composition containing 1 to 30% by mass of Zn and 1 to 11% by mass of Ni, the balance being Cu and inevitable impurities, wherein the metallic fastener member has a Vickers hardness of Hv 120 or more and less than Hv 220.Type: GrantFiled: December 26, 2014Date of Patent: December 25, 2018Assignee: YKK CorporationInventors: Yasuharu Yoshimura, Takahiro Fukuyama, Kousuke Seki, Atsushi Ogihara, Chikako Hiromi, Takuya Koizumi, Itaru Hasegawa, Kazuya Akitsu, Takanori Kumei, Kouta Kido
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Publication number: 20180049520Abstract: Elements for a slide fastener are provided, which have high strength and improved abrasion resistance. More particularly, an element for a slide fastener includes as a base material, an aluminum alloy having a composition represented by a general formula: AlaSibCucMgd in which a, b, c and d are expressed in percentage by mass, a denotes a balance, 0.4?b?0.9, 0.15?c?0.8, 0.8?d?2.0, and unavoidable impurity elements may be contained; and the aluminum alloy containing a precipitate containing Mg and Si.Type: ApplicationFiled: March 27, 2015Publication date: February 22, 2018Inventors: Takahiro Fukuyama, Koichi Mikado, Yasuharu Yoshimura, Tetsuya Katsumi, Tatewaki Ido
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Publication number: 20170349976Abstract: Provided is a metallic fastener member which has a specific color, i.e., a light gold color, and has all of practical strength, unsusceptibility to discoloration, and processability. The metallic fastener member comprises, as the base material, a copper alloy having a composition which contains 1-30 mass % Zn and 1-11 mass % Ni, with the remainder comprising Cu and unavoidable impurities, and has a Vickers hardness of 120 Hv or greater but less than 220 Hv.Type: ApplicationFiled: December 26, 2014Publication date: December 7, 2017Inventors: Yasuharu Yoshimura, Takahiro Fukuyama, Kousuke Seki, Atsushi Ogihara, Chikako Hiromi, Takuya Koizumi, Itaru Hasegawa, Kazuya Akitsu, Takanori Kumei, Kouta Kido
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Patent number: 9781981Abstract: There is provided a stop for a slide fastener. A top plate and a bottom plate are linked with one another at a transversely intermediate position by an integral connecting post. The lower side of the top plate is substantially flat. The bottom plate slopes away from the connecting post to form two leg members provided with a respective end flange pointing towards the top plate, the leg members being adapted to cooperate in use with the top plate to retain fastener tapes therebetween.Type: GrantFiled: July 20, 2012Date of Patent: October 10, 2017Assignee: YKK CorporationInventors: Takahiro Fukuyama, Yusuke Meiwa, Hayato Ishii, Futoshi Kozato, Takuro Hayashi, Massimiliano Di Girolami, Masamichi Yamagata
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Publication number: 20150218674Abstract: A copper alloy for fastening wherein the alloy has a structure of a mixture of ?-phase and a ?-phase; and wherein the alloy has a composition represented by the general formula: Cubal.ZnaMnb, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34?a?40.5, 0.1?b?6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b?(?8a+300)/7, where 34?a<37.5 and equation (2): b?(?5.5a+225.25)/5, where 35.5?a?40.5.Type: ApplicationFiled: August 9, 2012Publication date: August 6, 2015Applicant: YKK CorporationInventors: Kouta Kido, Takuya Koizumi, Yasuharu Yoshimura, Takahiro Fukuyama, Atsushi Ogihara, Kouichi Mikado, Jun Kiyohara, Yoshio Taira
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Patent number: 9023272Abstract: A copper-zinc alloy product of the invention contains zinc in an amount of higher than 35% by weight and 43% by weight or less and has a two-phase structure of an ?-phase and a ?-phase. Further, the ratio of the ?-phase in the copper-zinc alloy is controlled to be higher than 10% and less than 40% and the crystal grains of the ?-phase and the ?-phase are crushed into a flat shape and arranged in a layer shape through cold working. According to the copper-zinc alloy product, it is possible to decrease the copper content and to appropriately secure the strength and cold workability by appropriately controlling the ratio of the ?-phase.Type: GrantFiled: July 5, 2010Date of Patent: May 5, 2015Assignee: YKK CorporationInventors: Yasuharu Yoshimura, Takuya Koizumi, Koichi Mikado, Takahiro Fukuyama, Atsushi Ogihara
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Publication number: 20140150216Abstract: There is provided a stop for a slide fastener. A top plate and a bottom plate are linked with one another at a transversely intermediate position by an integral connecting post. The lower side of the top plate is substantially flat. The bottom plate slopes away from the connecting post to form two leg members provided with a respective end flange pointing towards the top plate, the leg members being adapted to cooperate in use with the top plate to retain fastener tapes therebetween.Type: ApplicationFiled: July 20, 2012Publication date: June 5, 2014Applicant: YKK CorporationInventors: Takahiro Fukuyama, Yusuke Meiwa, Hayato Ishii, Futoshi Kozato, Takuro Hayashi, Massimiliano Di Girolami, Masamichi Yamagata
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Publication number: 20130104349Abstract: A copper-zinc alloy product of the invention contains zinc in an amount of higher than 35% by weight and 43% by weight or less and has a two-phase structure of an ?-phase and a ?-phase. Further, the ratio of the ?-phase in the copper-zinc alloy is controlled to be higher than 10% and less than 40% and the crystal grains of the ?-phase and the ?-phase are crushed into a flat shape and arranged in a layer shape through cold working. According to the copper-zinc alloy product, it is possible to decrease the copper content and to appropriately secure the strength and cold workability by appropriately controlling the ratio of the ?-phase.Type: ApplicationFiled: July 5, 2010Publication date: May 2, 2013Inventors: Yasuharu Yoshimura, Takuya Koizumi, Koichi Mikado, Takahiro Fukuyama, Atsushi Ogihara
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Publication number: 20030110600Abstract: An object of the present invention is to provide, through plating, a slide fastener which has high decorativeness, and which does not have problems in terms of functionality or product quality such as corrosion resistance. Another object is to provide a method of manufacturing an attachment having constituent members.Type: ApplicationFiled: October 30, 2002Publication date: June 19, 2003Applicant: YKK CorporationInventors: Norio Kikukawa, Yasuhiko Sugimoto, Takahiro Fukuyama
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Publication number: 20030110601Abstract: The object of the present invention is to provide a copper alloy for slide fasteners which has excellent whiteness, does not contain nickel and hence does not have the problem of nickel allergy, and has excellent continuous castability and casting quality.Type: ApplicationFiled: October 30, 2002Publication date: June 19, 2003Applicant: YKK CORPORATIONInventors: Yasuhiko Sugimoto, Takahiro Fukuyama
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Patent number: 6340446Abstract: A nickel-free white copper alloy represented by the general formula: CuaZnbMncAld or CuaZnbMncAldXe, wherein X is at least one element selected from the group consisting of Si, Ti and Cr; b, c, d and e are 0.5≦b<5, 7≦c≦17, 0.5≦d≦4 and 0<e≦0.3 in terms of % by weight; a is the balance, the alloy incidentally including unavoidable elements. The alloy is free from allergic problems, which may be caused by nickel, and has excellent strength, hardness, ductility, workability and corrosion resistance, suitable for use in elements, sliders, stoppers or the like for slide fasteners, or accessories such as metallic buttons, fasteners or the like for clothes.Type: GrantFiled: April 14, 2000Date of Patent: January 22, 2002Assignee: YKK CorporationInventors: Kazuhiko Kita, Yasuhiko Sugimoto, Yasuharu Yoshimura, Takahiro Fukuyama