Patents by Inventor Ryohei Yuasa
Ryohei Yuasa 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: 20220332041Abstract: A granular material for a fused deposition three-dimensional printer that enables a flexible molded object to be manufactured with high precision. A granular material for a fused deposition three-dimensional printer is provided. The granular material is formed of a thermoplastic elastomer, and the thermoplastic elastomer has, at at least one of the measurement temperature of 120 to 270° C., a loss tangent tan ? of 0.40 or more and a loss modulus G? of 11000 Pa or less, which are measured with a rotary rheometer having a pair of parallel plates with a diameter of 20 mm and a measurement gap of 1.3 mm at a frequency of 1 Hz.Type: ApplicationFiled: September 25, 2020Publication date: October 20, 2022Applicant: KYORAKU CO., LTD.Inventors: Ryohei YUASA, Takashi NOMURA
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Patent number: 11338473Abstract: A filament can enable an arbitrary material to exhibit shape memory characteristics. A filament includes a linear core; and a covering layer covering the core; wherein: the core is formed with a shape memory material; and the covering layer is formed with a material different from the material of the core.Type: GrantFiled: November 2, 2018Date of Patent: May 24, 2022Assignee: KYORAKU CO., LTD.Inventors: Ryohei Yuasa, Takashi Nomura
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Patent number: 11332627Abstract: Provided is a filament resin molded article capable of reliably maintaining a shape of a 3D model when a shape memory resin is three-dimensionally formed. With the filament resin molded article, it is possible to form 3D models of various shapes, and to improve a curing speed. The filament resin molded article contains a shape memory resin and an inorganic filler. The inorganic filler is, for example, a glass fiber or a carbon fiber. The filament resin molded article is used for a hot melt lamination type 3D printer. A deformed shape is fixed by deforming a 3D shaped object formed using the filament resin molded article containing the shape memory resin, at a temperature which is equal to or higher than a glass transition temperature (Tg) of the shape memory resin and lower than a melting temperature or a decomposition temperature, and cooling the 3D shaped object to the glass transition temperature or lower while maintaining its shape.Type: GrantFiled: January 30, 2018Date of Patent: May 17, 2022Assignee: KYORAKU CO., LTD.Inventors: Ryohei Yuasa, Takashi Nomura
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Publication number: 20220105675Abstract: The present invention provides a granular material for a fused deposition three-dimensional printer that enables a flexible molded object to be manufactured with high precision. According to the present invention, provided is a granular material for a fused deposition three-dimensional printer. The granular material is formed of a thermoplastic elastomer, and thermoplastic elastomer has a Shore A hardness of 0 to 10 and a melt flow rate of 10 to 200 g/10 min at least one of measurement temperatures of 120 to 230° C.Type: ApplicationFiled: February 4, 2020Publication date: April 7, 2022Applicant: KYORAKU CO., LTD.Inventors: Ryohei YUASA, Takashi NOMURA
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Patent number: 11141901Abstract: A molded resin strand includes a first layer containing thermoplastic resin, and a second layer covering the first layer and containing thermoplastic resin exhibiting physical properties different from those of the first layer. For example, the second layer is melt-extruded with the second layer covering the first layer. A three-dimensional object is modeled by lamination deposition by fusion between adjacent second layers. In a molded resin strand manufacturing method, a melt-kneaded resin material is continuously extruded from a ferrule of an extruder. The extruded molded resin strand is vacuum-sucked while passing through a sizing device. Subsequently, the molded resin strand is wound up after cooling solidification. The sizing device is provided with a space having a circular cross section, and a surface of the sizing device facing the space is provided with a plurality of vacuum suction grooves.Type: GrantFiled: March 31, 2016Date of Patent: October 12, 2021Assignee: Kyoraku Co., Ltd.Inventors: Ryohei Yuasa, Takashi Nomura, Naoki Ueda
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Patent number: 11072238Abstract: A four-wheel drive vehicle in which, when a switching request is made for switching from a non-meshing state to a meshing state, the control device calculates a first rotation speed difference between the drive-power-source-side meshing teeth and the sub-drive-wheel-side meshing teeth, and a second rotation speed difference between the drive-power-source-side meshing teeth and the sub-drive-wheel-side meshing teeth. If at least one of the calculated first and second rotation speed differences is within a predetermined range set in advance, the control device couples the sub-drive wheel corresponding to the rotation speed difference within the predetermined range, to the central axle by the control coupling to switch the dog clutch from the non-meshing state to the meshing state. And, if neither the calculated first nor second rotation speed difference is within the predetermined range, the control device prohibits switching of the dog clutch from the non-meshing state to the meshing state.Type: GrantFiled: April 23, 2019Date of Patent: July 27, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryohei Yuasa, Satoshi Ishida, Shota Murai, Taito Goto
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Publication number: 20210186154Abstract: A structure in which complexity of the moving path of the nozzle during forming is suppressed even if the structure has regions with different elasticity and a manufacturing method for a structure that can suppress complexity of the moving path of the nozzle when forming the structure with regions with different elasticity. The structure includes a formed body with a linear structure formed of a linear resin. The formed body includes first and second elastic regions, and the linear resin forming the first elastic region is thinner than the linear resin forming the second elastic region.Type: ApplicationFiled: June 28, 2019Publication date: June 24, 2021Applicant: KYORAKU CO., LTD.Inventor: Ryohei YUASA
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Publication number: 20210170633Abstract: A filament can enable an arbitrary material to exhibit shape memory characteristics. A filament includes a linear core; and a covering layer covering the core; wherein: the core is formed with a shape memory material; and the covering layer is formed with a material different from the material of the core.Type: ApplicationFiled: November 2, 2018Publication date: June 10, 2021Applicant: KYORAKU CO., LTD.Inventors: Ryohei YUASA, Takashi NOMURA
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Patent number: 10988603Abstract: Provided is a molded resin strand configured so that interlayer fusion of a shaped object can be improved and mechanical aptitude (specifically, stiffness) in a 3D printer can be more improved even in a case where an inorganic filler such as carbon fibers is mixed. The molded resin strand contains thermoplastic resin, an inorganic filler, and ?-olefin elastomer. The thermoplastic resin is polypropylene, for example. The inorganic filler is carbon fibers, for example. The ?-olefin elastomer is ethylene-?-olefin copolymer, for example. The molded resin strand of the present invention is used for a 3D printer employing a fused deposition modeling method.Type: GrantFiled: September 28, 2016Date of Patent: April 27, 2021Assignee: KYORAKU CO., LTD.Inventors: Ryohei Yuasa, Takashi Nomura
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Patent number: 10518638Abstract: A control device of a four-wheel-drive vehicle having an electronic control coupling changing a transmission torque, and a connecting/disconnecting mechanism connecting/disconnecting an input to the input-side rotating member of the coupling, comprising: a storage portion storing a relationship between the drive current to the coupling and the transmission torque of the coupling; a control portion controlling the drive current based on the relationship; and a learning portion performing correction for the relationship through learning by applying a braking torque to the input-side rotating member by an electromagnetic actuator.Type: GrantFiled: March 28, 2018Date of Patent: December 31, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Ryohei Yuasa
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Publication number: 20190390071Abstract: Provided is a filament resin molded article capable of reliably maintaining a shape of a 3D model when a shape memory resin is three-dimensionally formed. With the filament resin molded article, it is possible to form 3D models of various shapes, and to improve a curing speed. The filament resin molded article contains a shape memory resin and an inorganic filler. The inorganic filler is, for example, a glass fiber or a carbon fiber. The filament resin molded article is used for a hot melt lamination type 3D printer. A deformed shape is fixed by deforming a 3D shaped object formed using the filament resin molded article containing the shape memory resin, at a temperature which is equal to or higher than a glass transition temperature (Tg) of the shape memory resin and lower than a melting temperature or a decomposition temperature, and cooling the 3D shaped object to the glass transition temperature or lower while maintaining its shape.Type: ApplicationFiled: January 30, 2018Publication date: December 26, 2019Inventors: Ryohei YUASA, Takashi NOMURA
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Publication number: 20190322171Abstract: A four-wheel drive vehicle in which, when a switching request is made for switching from a non-meshing state to a meshing state, the control device calculates a first rotation speed difference between the drive-power-source-side meshing teeth and the sub-drive-wheel-side meshing teeth, and a second rotation speed difference between the drive-power-source-side meshing teeth and the sub-drive-wheel-side meshing teeth. If at least one of the calculated first and second rotation speed differences is within a predetermined range set in advance, the control device couples the sub-drive wheel corresponding to the rotation speed difference within the predetermined range, to the central axle by the control coupling to switch the dog clutch from the non-meshing state to the meshing state. And, if neither the calculated first nor second rotation speed difference is within the predetermined range, the control device prohibits switching of the dog clutch from the non-meshing state to the meshing state.Type: ApplicationFiled: April 23, 2019Publication date: October 24, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryohei YUASA, Satoshi ISHIDA, Shota MURAI, Taito GOTO
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Publication number: 20180281593Abstract: A control device of a four-wheel-drive vehicle having an electronic control coupling changing a transmission torque, and a connecting/disconnecting mechanism connecting/disconnecting an input to the input-side rotating member of the coupling, comprising: a storage portion storing a relationship between the drive current to the coupling and the transmission torque of the coupling; a control portion controlling the drive current based on the relationship; and a learning portion performing correction for the relationship through learning by applying a braking torque to the input-side rotating member by an electromagnetic actuator.Type: ApplicationFiled: March 28, 2018Publication date: October 4, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Ryohei YUASA
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Publication number: 20180265685Abstract: Provided is a molded resin strand configured so that interlayer fusion of a shaped object can be improved and mechanical aptitude (specifically, stiffness) in a 3D printer can be more improved even in a case where an inorganic filler such as carbon fibers is mixed. The molded resin strand contains thermoplastic resin, an inorganic filler, and ?-olefin elastomer. The thermoplastic resin is polypropylene, for example. The inorganic filler is carbon fibers, for example. The ?-olefin elastomer is ethylene-?-olefin copolymer, for example. The molded resin strand of the present invention is used for a 3D printer employing a fused deposition modeling method.Type: ApplicationFiled: September 28, 2016Publication date: September 20, 2018Inventors: Ryohei YUASA, Takashi NOMURA
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Publication number: 20180093413Abstract: A molded resin strand includes a first layer containing thermoplastic resin, and a second layer covering the first layer and containing thermoplastic resin exhibiting physical properties different from those of the first layer. For example, the second layer is melt-extruded with the second layer covering the first layer. A three-dimensional object is modeled by lamination deposition by fusion between adjacent second layers. In a molded resin strand manufacturing method, a melt-kneaded resin material is continuously extruded from a ferrule of an extruder. The extruded molded resin strand is vacuum-sucked while passing through a sizing device. Subsequently, the molded resin strand is wound up after cooling solidification. The sizing device is provided with a space having a circular cross section, and a surface of the sizing device facing the space is provided with a plurality of vacuum suction grooves.Type: ApplicationFiled: March 31, 2016Publication date: April 5, 2018Applicant: Kyoraku Co., Ltd.Inventors: Ryohei YUASA, Takashi NOMURA, Naoki UEDA
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Patent number: 9834091Abstract: A control device for a vehicle. The vehicle includes a drive power source, a first drive wheel, a second drive wheel, and a drive power distribution device. One of the first drive wheel and the second drive wheel is provided on the left side with respect to the traveling direction of the vehicle, and the other drive wheel is provided on the right side with respect to the traveling direction of the vehicle. The drive power distribution device distributes power from the drive power source to the first drive wheel and the second drive wheel. The control device includes an electronic control unit. The electronic control unit is configured to perform drive power distribution control. The drive power distribution control is control for distributing drive power to the first drive wheel and the second drive wheel by the drive power distribution device. The electronic control unit is configured to make a first variation of a control command value be smaller than a second variation of the control command value.Type: GrantFiled: May 12, 2015Date of Patent: December 5, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Ryohei Yuasa
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Publication number: 20170182886Abstract: A synchromesh mechanism is activated when cancelling a disconnection state, and, when an electronic control unit determines that a rotation speed of an input shaft has been synchronized with a rotation speed of a first ring gear, a second intermeshing clutch is engaged, and then a first intermeshing clutch is engaged. For this reason, in the first intermeshing clutch, a decrease in the rotation speed of the first ring gear is suppressed as a result of engagement of the second intermeshing clutch. This suppresses out of synchronization between the rotation speed of the first ring gear and the rotation speed of the input shaft at the time when the first intermeshing clutch is engaged.Type: ApplicationFiled: December 22, 2016Publication date: June 29, 2017Inventors: Ryota Horie, Takahiro Yoshimura, Ryohei Yuasa, Shunro Fukada
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Publication number: 20170144543Abstract: A control device for a vehicle. The vehicle includes a drive power source, a first drive wheel, a second drive wheel, and a drive power distribution device. One of the first drive wheel and the second drive wheel is provided on the left side with respect to the traveling direction of the vehicle, and the other drive wheel is provided on the right side with respect to the traveling direction of the vehicle. The drive power distribution device distributes power from the drive power source to the first drive wheel and the second drive wheel. The control device includes an electronic control unit. The electronic control unit is configured to perform drive power distribution control. The drive power distribution control is control for distributing drive power to the first drive wheel and the second drive wheel by the drive power distribution device. The electronic control unit is configured to make a first variation of a control command value be smaller than a second variation of the control command value.Type: ApplicationFiled: May 12, 2015Publication date: May 25, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Ryohei YUASA
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Patent number: D750520Type: GrantFiled: September 19, 2014Date of Patent: March 1, 2016Assignee: THE YOKOHAMA RUBBER CO., LTD.Inventors: Ryohei Yuasa, Hiroshi Saegusa, Masahiko Nagahama