Patents by Inventor Keisuke Koyama
Keisuke Koyama 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: 20230253869Abstract: Provided is a magnetic gear which has a large transmission torque, stability, and a simple structure. A magnetic gear (30) includes: a first magnetic pole array (34) that includes first N poles (35) and first S poles (36) alternately arranged on an outer peripheral inclined surface (32) of a rotary disc (31); a second magnetic pole array (37) that includes second N poles (38) and second S poles (39) alternately arranged on the outer peripheral inclined surface (32), one of the second N poles (38) is positioned at a location corresponding to an intermediate position between a corresponding one of the first N poles (35) and a corresponding one of the second S poles (36) that are adjacent to each other.Type: ApplicationFiled: July 6, 2021Publication date: August 10, 2023Inventor: Keisuke KOYAMA
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Publication number: 20230211512Abstract: An actuator unit (1) includes a direct drive motor (2), a first magnetic gear (3) connected to a rotating shaft (6) of the direct drive motor (2), a second magnetic gear (4) configured to be magnetically engaged with the first magnetic gear (3), and a planetary reducer (5) connected to a rotating shaft of the second magnetic gear (4).Type: ApplicationFiled: June 4, 2020Publication date: July 6, 2023Inventor: Keisuke KOYAMA
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Publication number: 20220404199Abstract: Provided is a resin panel enabling an infrared sensor to fully function when the resin panel is applied as a protective cover to the infrared sensor. The resin panel comprises at least a core layer and has a light transmittance at a wavelength of 905 nm of 85% or more and a visible light transmittance of 20% or less.Type: ApplicationFiled: November 19, 2020Publication date: December 22, 2022Inventors: Keisuke KOYAMA, Kentaro AKIYAMA, Naoki SASOU, Masahiro TADA, Tomonori NISHIDA
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Patent number: 11529798Abstract: The purpose of the present invention is to provide a transfer sheet capable of providing hard coat properties and excellent weather resistance to a resin molded article such as organic glass. The transfer sheet has, in order, a base material film for mold release, a hard coat layer, a primer layer, and an adhesive layer. The weather resistance and adhesiveness of the hard coat layer and the primer layer are improved and hard coat properties and excellent weather resistance can be provided to a resin molded article being the transfer object, as a result of: the hard coat layer being formed from a cured product of a resin composition including a curable resin; and the primer layer being formed from a binder resin including a polyurethane having a mass-average molecular weight of 40,000-100,000 and including 1-30% by mass of an acrylic component.Type: GrantFiled: August 24, 2020Date of Patent: December 20, 2022Assignee: Dai Nippon Printing Co., Ltd.Inventors: Shunji Fukuda, Junichi Tamuki, Keisuke Koyama
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Patent number: 11318715Abstract: The present disclosure provides a hard coat film comprising: a hard coat layer and a primer layer; wherein the primer layer includes a first layer of which transmittance with respect to light having a wavelength of 380 nm is 30% or below, and a second layer of which transmittance with respect to light having a wavelength of 340 nm is 10% or below; the first layer and the second layer are layered, in no particular order, in the position of one surface of the hard coat layer; and a substrate layer is included in the position of the surface of the hard coat layer which is opposite side surface to the primer layer side surface, or in the position of the surface of the primer layer which is opposite side surface to the hard coat layer side surface.Type: GrantFiled: September 27, 2018Date of Patent: May 3, 2022Assignee: Dai Nippon Printing Co., Ltd.Inventor: Keisuke Koyama
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Publication number: 20200384747Abstract: The purpose of the present invention is to provide a transfer sheet capable of providing hard coat properties and excellent weather resistance to a resin molded article such as organic glass. The transfer sheet has, in order, a base material film for mold release, a hard coat layer, a primer layer, and an adhesive layer. The weather resistance and adhesiveness of the hard coat layer and the primer layer are improved and hard coat properties and excellent weather resistance can be provided to a resin molded article being the transfer object, as a result of: the hard coat layer being formed from a cured product of a resin composition including a curable resin; and the primer layer being formed from a binder resin including a polyurethane having a mass-average molecular weight of 40,000-100,000 and including 1-30% by mass of an acrylic component.Type: ApplicationFiled: August 24, 2020Publication date: December 10, 2020Applicant: Dai Nippon Printing Co., Ltd.Inventors: Shunji Fukuda, Junichi Tamuki, Keisuke Koyama
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Publication number: 20200376803Abstract: The present disclosure provides a hard coat film comprising: a hard coat layer and a primer layer; wherein the primer layer includes a first layer of which transmittance with respect to light having a wavelength of 380 nm is 30% or below, and a second layer of which transmittance with respect to light having a wavelength of 340 nm is 10% or below; the first layer and the second layer are layered, in no particular order, in the position of one surface of the hard coat layer; and a substrate layer is included in the position of the surface of the hard coat layer which is opposite side surface to the primer layer side surface, or in the position of the surface of the primer layer which is opposite side surface to the hard coat layer side surface.Type: ApplicationFiled: September 27, 2018Publication date: December 3, 2020Inventor: Keisuke Koyama
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Patent number: 10792903Abstract: The purpose of the present invention is to provide a transfer sheet capable of providing hard coat properties and excellent weather resistance to a resin molded article such as organic glass. The transfer sheet has, in order, a base material film for mold release, a hard coat layer, a primer layer, and an adhesive layer. The weather resistance and adhesiveness of the hard coat layer and the primer layer are improved and hard coat properties and excellent weather resistance can be provided to a resin molded article being the transfer object, as a result of: the hard coat layer being formed from a cured product of a resin composition including a curable resin; and the primer layer being formed from a binder resin including a polyurethane having a mass-average molecular weight of 40,000-100,000 and including 1-30% by mass of an acrylic component.Type: GrantFiled: November 5, 2015Date of Patent: October 6, 2020Assignee: Dai Nippon Printing Co., Ltd.Inventors: Shunji Fukuda, Junichi Tamuki, Keisuke Koyama
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Patent number: 10434752Abstract: An objective of the present invention is to provide an organic glass laminate that exhibits excellent weathering resistance and abrasion resistance, and that can be used as an exterior member. This organic glass laminate comprises at least the following, in order: an organic glass base, a cured layer formed from the cured product of a resin composition, which comprises a curable resin and a UV absorber agent; and an inorganic oxide film. The glass transition temperature of the cured product which constitutes the cured layer is adjusted to 80-160° C., and the thickness of the inorganic oxide film is set to at least 0.01 ?m and less than 0.5 ?m, whereby weathering resistance and abrasion resistance are significantly improved, and the organic glass laminate is made suitable for use as an exterior member.Type: GrantFiled: December 2, 2015Date of Patent: October 8, 2019Assignee: Dai Nippon Printing Co., Ltd.Inventors: Shunji Fukuda, Junichi Tamuki, Wataru Saitou, Kazuyuki Takasawa, Taro Morimoto, Keisuke Koyama, Misato Kamei, Masanao Matsuoka
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Publication number: 20170320295Abstract: An objective of the present invention is to provide an organic glass laminate that exhibits excellent weathering resistance and abrasion resistance, and that can be used as an exterior member. This organic glass laminate comprises at least the following, in order: an organic glass base, a cured layer formed from the cured product of a resin composition, which comprises a curable resin and a UV absorber agent; and an inorganic oxide film. The glass transition temperature of the cured product which constitutes the cured layer is adjusted to 80-160° C., and the thickness of the inorganic oxide film is set to at least 0.01 ?m and less than 0.5 ?m, whereby weathering resistance and abrasion resistance are significantly improved, and the organic glass laminate is made suitable for use as an exterior member.Type: ApplicationFiled: December 2, 2015Publication date: November 9, 2017Inventors: Shunji Fukuda, Junichi Tamuki, Wataru Saitou, Kazuyuki Takasawa, Taro Morimoto, Keisuke Koyama, Misato Kamei, Masanao Matsuoka
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Publication number: 20170313911Abstract: The purpose of the present invention is to provide a transfer sheet capable of providing hard coat properties and excellent weather resistance to a resin molded article such as organic glass. The transfer sheet has, in order, a base material film for mold release, a hard coat layer, a primer layer, and an adhesive layer. The weather resistance and adhesiveness of the hard coat layer and the primer layer are improved and hard coat properties and excellent weather resistance can be provided to a resin molded article being the transfer object, as a result of: the hard coat layer being formed from a cured product of a resin composition including a curable resin; and the primer layer being formed from a binder resin including a polyurethane having a mass-average molecular weight of 40,000-100,000 and including 1-30% by mass of an acrylic component.Type: ApplicationFiled: November 5, 2015Publication date: November 2, 2017Inventors: Shunji Fukuda, Junichi Tamuki, Keisuke Koyama
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Patent number: 8914200Abstract: A control device for a belt type continuously variable transmission device includes primary And secondary pulleys and a belt and controls gear ratio based on a running radius of the belt on a pulley by controlling primary and secondary oil pressures. The transmission includes a belt slip control unit and a belt slip control permission determining unit. The belt slip control unit performs such control as to oscillate the secondary oil pressure, estimates a belt slip condition by monitoring the phase difference between an oscillation component included in an actual secondary oil pressure and an oscillation component included in an actual gear ration, and then reduces the actual secondary oil pressure to maintain a predetermined belt slip condition. The belt slip control permission determining unit permits belt slip control when a transmission rate as a change rate of the gear ratio is less than a predetermined value.Type: GrantFiled: April 30, 2009Date of Patent: December 16, 2014Assignees: Nissan Motor Co., Ltd., Jatco LtdInventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Kenta Nakamura, Kiyotaka Sawano, Masahiro Nishi, Hidemasa Kawaguchi, Keisuke Koyama
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Patent number: 8914201Abstract: A control device controls a belt type continuously variable transmission including a belt slip controller and a belt slip control permission determining unit. The device decreases belt friction when an estimated accuracy of a belt slip condition is high and prevents a belt from greatly slipping when an estimated accuracy is low. The device includes primary and secondary pulleys and the belt, and controls a gear ratio based on a running radius of the belt on a pulley by controlling primary and secondary oil pressures. The controller oscillates a secondary oil pressure, estimates the belt slip condition by monitoring a phase difference between oscillation components, and reduces an actual secondary oil pressure to maintain a predetermined belt slip condition. The determining unit permits belt slip control when a torque change speed input to the transmission mechanism is less than a predetermined value.Type: GrantFiled: April 30, 2009Date of Patent: December 16, 2014Assignees: Nissan Motor Co., Ltd., Jatco LtdInventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Kenta Nakamura, Tomoyuki Mizuochi, Kiyotaka Sawano, Masahiro Nishi, Hidemasa Kawaguchi, Keisuke Koyama
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Patent number: 8892318Abstract: A control device controls a belt type continuously variable transmission including a primary pulley, a secondary pulley, and a belt, and controls a gear ratio based on a primary oil pressure and a secondary oil pressure. The control device includes a belt slip controller which oscillates the secondary oil pressure and monitors a phase difference between an oscillation component included in an actual secondary oil pressure and an oscillation component included in an actual gear ratio to estimate a belt slip state. The controller controls the actual secondary oil pressure to decrease based on the estimation to maintain a predetermined belt slip state. An oscillation amplitude setter sets an oscillation amplitude of the secondary hydraulic pressure small when the gear ratio is high compared with when the gear ratio is low, in a case of oscillating the secondary hydraulic pressure in the belt slip control.Type: GrantFiled: April 30, 2009Date of Patent: November 18, 2014Assignees: Jatco Ltd, Nissan Motor Co., Ltd.Inventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Masahiro Nishi, Keisuke Koyama, Kenta Nakamura, Kiyotaka Sawano, Hidemasa Kawaguchi
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Patent number: 8843287Abstract: A belt type continuously variable transmission mechanism has a primary pulley, a secondary pulley, and a belt, and a secondary hydraulic pressure controller to determine command secondary hydraulic pressure by feedback control based on the deviation between target secondary hydraulic pressure and actual hydraulic pressure, and control the secondary hydraulic pressure to the secondary pulley. The belt type continuously variable transmission mechanism further includes a belt slip control device to estimate a belt slip condition by monitoring the phase difference between an oscillation component included in the actual secondary hydraulic pressure and an oscillation component included in the actual transmission gear ratio and control the actual secondary hydraulic pressure to decrease based on the estimation so that a predetermined belt slip condition is maintained.Type: GrantFiled: April 30, 2009Date of Patent: September 23, 2014Assignees: Jatco Ltd, Nissan Motor Co., Ltd.Inventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Masahiro Nishi, Keisuke Koyama, Kenta Nakamura, Kiyotaka Sawano, Hidemasa Kawaguchi
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Publication number: 20120135829Abstract: Provided is control device and method for a belt type continuously variable transmission which can reduce drive energy consumption by a decrease in belt friction when the estimated accuracy of belt slip condition is high and which can prevent the belt from greatly slipping during belt slip control when the estimated accuracy of belt slip condition is low. The device includes a primary pulley (42), a secondary pulley (43), and a belt (44) and controls gear ratio based on the running radius of the belt (44) on the pulley by controlling the primary oil pressure and the secondary oil pressure. A belt type continuously variable transmission (4) comprises a belt slip control means (FIG.Type: ApplicationFiled: April 30, 2009Publication date: May 31, 2012Inventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Masahiro Nishi, Keisuke Koyama, Kenta Nakamura, Kiyotaka Sawano, Hedemasa Kawaguchi
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Publication number: 20120115678Abstract: Provided is control device and method for a belt type continuously variable transmission which can reduce drive energy consumption by a decrease in belt friction when the estimated accuracy of belt slip condition is high and which can prevent the belt from greatly slipping during belt slip control when the estimated accuracy of belt slip condition is low. The device includes a primary pulley (42), a secondary pulley (43), and a belt (44) and controls gear ratio based on the running radius of the belt (44) on the pulley by controlling the primary oil pressure and the secondary oil pressure.Type: ApplicationFiled: April 30, 2009Publication date: May 10, 2012Inventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Kenta Nakamura, Kiyotaka Sawano, Masahiro Nishi, Hidemasa Kawaguchi, Keisuke Koyama
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Publication number: 20120108374Abstract: Provided are control device and method for a belt type continuously variable transmission which can improve control stability of secondary hydraulic pressure with the estimated accuracy of a belt slip condition during belt slip control ensured. The device has a primary pulley (42), a secondary pulley (43), and a belt (44), and a secondary hydraulic pressure controller (92) to determine command secondary hydraulic pressure by feedback control based on the deviation (?) between target secondary hydraulic pressure and actual hydraulic pressure, and control the secondary hydraulic pressure to the secondary pulley (43). A belt type continuously variable transmission mechanism (4) includes a belt slip control means (FIG.Type: ApplicationFiled: April 30, 2009Publication date: May 3, 2012Applicants: NISSAN MOTOR CO., LTD., JATCO LTD.Inventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Masahiro Nishi, Keisuke Koyama, Kenta Nakamura, Kiyotaka Sawano, Hidemasa Kawaguchi
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Publication number: 20120108373Abstract: Provided is control device and method for a belt type continuously variable transmission which can reduce drive energy consumption by a decrease in belt friction when the estimated accuracy of belt slip condition is high and which can prevent the belt from greatly slipping during belt slip control when the estimated accuracy of belt slip condition is low. The device includes a primary pulley (42), a secondary pulley (43), and a belt (44) and controls gear ratio based on the running radius of the belt (44) on the pulley by controlling the primary oil pressure and the secondary oil pressure.Type: ApplicationFiled: April 30, 2009Publication date: May 3, 2012Applicants: JATCO LTD., NISSAN MOTOR CO., LTD.Inventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Kenta Nakamura, Tomoyuki Mizuochi, Kiyotaka Sawano, Masahiro Nishi, Hidemasa Kawaguchi, Keisuke Koyama