Patents by Inventor Takafumi Hatakeda
Takafumi Hatakeda 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: 11878363Abstract: It is an object of the present invention to provide a roll-bonded laminate controlled in warping and a method for producing the same. The method produces the roll-bonded laminate having a two-layer structure of a first metal layer and a second metal layer, by roll-bonding a first metal plate and a second metal plate, wherein the surface hardness Hv of the first metal plate is lower than the surface hardness Hv of the second metal plate; and the method comprises roll-bonding so as to satisfy the following expression (1): 0<(?L1/?L2)/T?38??(1) wherein ?L1 (mm) represents an elongation amount of the first metal layer with respect to the first metal plate; ?L2 (mm) represents an elongation amount of the second metal layer with respect to the second metal plate; and T (mm) represents the total thickness of the roll-bonded laminate.Type: GrantFiled: April 1, 2019Date of Patent: January 23, 2024Assignee: Toyo Kohan Co., Ltd.Inventors: Takafumi Hatakeda, Yusuke Hashimoto, Teppei Kurokawa
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Patent number: 11840045Abstract: This invention provides a relatively thick roll-bonded laminate that exhibits a high Erichsen value and excellent molding workability. Such roll-bonded laminate is composed of a stainless steel layer and a non-stainless steel metal layer, and it is characterized in that thickness T is 0.2 mm to 3 mm and a correlation between a proportion PSUS of thickness TSUS of the stainless steel layer relative to thickness T and a half width FWHM200 of a peak exhibiting a crystal plane orientation (200) determined by X-ray diffraction analysis of the stainless steel layer side satisfies the correlation represented by the formula: FWHM200?0.0057PSUS+0.4.Type: GrantFiled: March 29, 2018Date of Patent: December 12, 2023Assignee: Toyo Kohan Co., Ltd.Inventors: Yusuke Hashimoto, Kota Sadaki, Teppei Kurokawa, Takashi Koshiro, Takafumi Hatakeda
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Patent number: 11691386Abstract: This invention provides a roll-bonded laminate that is excellent in press workability and/or a roll-bonded laminate with improved performance and ease of handling at the time of production. More specifically, this invention relates to a roll-bonded laminate composed of a stainless steel layer and an aluminum alloy layer with the peel strength of 60 N/20 mm or higher, a roll-bonded laminate composed of a stainless steel layer and a pure aluminum layer with the peel strength of 160 N/20 mm or higher, and a roll-bonded laminate composed of a pure titanium or titanium alloy layer and an aluminum alloy layer with the peel strength of 40 N/20 mm or higher.Type: GrantFiled: March 1, 2022Date of Patent: July 4, 2023Assignee: TOYO KOHAN CO., LTD.Inventors: Kota Sadaki, Takashi Koshiro, Takafumi Hatakeda
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Patent number: 11453203Abstract: This invention provides a metal laminate that maintains functionality such as radiation performance and is excellent in dimensional accuracy after press work. Such metal laminate is a roll-bonded laminate composed of 2 or more metal layers, which exhibits a ratio ?/T of the standard deviation ? of thickness T1 of the outermost layer to thickness T of the roll-bonded laminate of 0% of 4.0%, the thickness T of 2 mm or less, and the deviation of the thickness T of 4.0% or less.Type: GrantFiled: February 7, 2018Date of Patent: September 27, 2022Inventors: Kota Sadaki, Teppei Kurokawa, Yusuke Hashimoto, Takafumi Hatakeda
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Publication number: 20220184923Abstract: This invention provides a roll-bonded laminate that is excellent in press workability and/or a roll-bonded laminate with improved performance and ease of handling at the time of production. More specifically, this invention relates to a roll-bonded laminate composed of a stainless steel layer and an aluminum alloy layer with the peel strength of 60 N/20 mm or higher, a roll-bonded laminate composed of a stainless steel layer and a pure aluminum layer with the peel strength of 160 N/20 mm or higher, and a roll-bonded laminate composed of a pure titanium or titanium alloy layer and an aluminum alloy layer with the peel strength of 40 N/20 mm or higher.Type: ApplicationFiled: March 1, 2022Publication date: June 16, 2022Applicant: Toyo Kohan Co., Ltd.Inventors: Kota Sadaki, Takashi Koshiro, Takafumi Hatakeda
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Patent number: 11305512Abstract: This invention provides a roll-bonded laminate that is excellent in press workability and/or a roll-bonded laminate with improved performance and ease of handling at the time of production. More specifically, this invention relates to a roll-bonded laminate composed of a stainless steel layer and an aluminum alloy layer with the peel strength of 60 N/20 mm or higher, a roll-bonded laminate composed of a stainless steel layer and a pure aluminum layer with the peel strength of 160 N/20 mm or higher, and a roll-bonded laminate composed of a pure titanium or titanium alloy layer and an aluminum alloy layer with the peel strength of 40 N/20 mm or higher.Type: GrantFiled: March 29, 2018Date of Patent: April 19, 2022Assignee: Toyo Kohan Co., Ltd.Inventors: Kota Sadaki, Takashi Koshiro, Takafumi Hatakeda
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Publication number: 20210114347Abstract: This invention provides a roll-bonded laminate for an electronic device that exhibits high rigidity and a high elastic modulus and is suitable for housing applications. More specifically, this invention concerns a roll-bonded laminate for an electronic device composed of a stainless steel layer and an aluminum alloy layer, wherein thickness TAl (mm) and surface hardness HAl (HV) of the aluminum alloy layer and thickness TSUS (mm) and surface hardness HSUS (HV) of the stainless steel layer satisfy the correlation represented by Formula (1): HSUSTSUS2?(34.96+0.03×(HAlTAl2)2?3.57×HAlTAl2)/(?0.008×(HAlTAl2)2+0.061×HAlTAl2+1.354). This invention also concerns an electronic device housing.Type: ApplicationFiled: March 29, 2018Publication date: April 22, 2021Applicant: TOYO KOHAN CO., LTD.Inventors: Kota SADAKI, Teppei KUROKAWA, Yusuke HASHIMOTO, Takafumi HATAKEDA, Takashi KOSHIRO
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Publication number: 20210107254Abstract: This invention provides a roll-bonded laminate that is excellent in press workability and/or a roll-bonded laminate with improved performance and ease of handling at the time of production. More specifically, this invention relates to a roll-bonded laminate composed of a stainless steel layer and an aluminum alloy layer with the peel strength of 60 N/20 mm or higher, a roll-bonded laminate composed of a stainless steel layer and a pure aluminum layer with the peel strength of 160 N/20 mm or higher, and a roll-bonded laminate composed of a pure titanium or titanium alloy layer and an aluminum alloy layer with the peel strength of 40 N/20 mm or higher.Type: ApplicationFiled: March 29, 2018Publication date: April 15, 2021Applicant: Toyo Kohan Co., Ltd.Inventors: Kota Sadaki, Takashi Koshiro, Takafumi Hatakeda
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Publication number: 20210101364Abstract: This invention provides a relatively thick roll-bonded laminate that exhibits a high Erichsen value and excellent molding workability. Such roll-bonded laminate is composed of a stainless steel layer and a non-stainless steel metal layer, and it is characterized in that thickness T is 0.2 mm to 3 mm and a correlation between a proportion PSUS of thickness TSUS of the stainless steel layer relative to thickness T and a half width FWHM200 of a peak exhibiting a crystal plane orientation (200) determined by X-ray diffraction analysis of the stainless steel layer side satisfies the correlation represented by the formula: FWHM200?0.0057PSUS+0.4.Type: ApplicationFiled: March 29, 2018Publication date: April 8, 2021Applicant: TOYO KOHAN CO., LTDInventors: Yusuke HASHIMOTO, Kota SADAKI, Teppei KUROKAWA, Takashi KOSHIRO, Takafumi HATAKEDA
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Publication number: 20210023648Abstract: It is an object of the present invention to provide a roll-bonded laminate controlled in warping and a method for producing the same. The method produces the roll-bonded laminate having a two-layer structure of a first metal layer and a second metal layer, by roll-bonding a first metal plate and a second metal plate, wherein the surface hardness Hv of the first metal plate is lower than the surface hardness Hv of the second metal plate; and the method comprises roll-bonding so as to satisfy the following expression (1): 0<(?L1/?L2)/T?38??(1) wherein ?L1 (mm) represents an elongation amount of the first metal layer with respect to the first metal plate; ?L2 (mm) represents an elongation amount of the second metal layer with respect to the second metal plate; and T (mm) represents the total thickness of the roll-bonded laminate.Type: ApplicationFiled: April 1, 2019Publication date: January 28, 2021Applicant: TOYO KOHAN CO., LTDInventors: Takafumi HATAKEDA, Yusuke HASHIMOTO, Teppei KUROKAWA
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Publication number: 20200031096Abstract: This invention provides a metal laminate that maintains functionality such as radiation performance and is excellent in dimensional accuracy after press work. Such metal laminate is a roll-bonded laminate composed of 2 or more metal layers, which exhibits a ratio ?/T of the standard deviation ? of thickness T1 of the outermost layer to thickness T of the roll-bonded laminate of 0% of 4.0%, the thickness T of 2 mm or less, and the deviation of the thickness T of 4.0% or less.Type: ApplicationFiled: February 7, 2018Publication date: January 30, 2020Applicant: Toyo Kohan Co., Ltd.Inventors: Kota Sadaki, Teppei Kurokawa, Yusuke Hashimoto, Takafumi Hatakeda