Patents by Inventor Hiroki Nagai
Hiroki Nagai 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: 20190323577Abstract: A four-bar linkage vibration absorbing device includes: crank members each coupled to a driven member of a damper device via a coupling shaft and each capable of swinging about the coupling shaft when the driven member is rotated; and a mass body that is coupled to the driven member via the crank members and that swings about the rotation center RC together with the crank members when the driven member is rotated. The driven member is coupled to a turbine runner of a hydraulic transmission device so as to rotate with the turbine runner.Type: ApplicationFiled: July 1, 2019Publication date: October 24, 2019Applicant: AISIN AW CO., LTD.Inventors: Yoshihiro Takikawa, Hiroki Nagai, Takao Sakamoto, Masaki Wajima
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Patent number: 10443679Abstract: A damper device that includes a first torque transmission path including a first elastic body that transmits torque between the input element and the output element; and a second torque transmission path disposed in parallel with the first torque transmission path and including first and second intermediate elements, a second elastic body that transmits the torque between the input element and the first intermediate element, a third elastic body that transmits the torque between the first intermediate element and the second intermediate element, and a fourth elastic body that transmits the torque between the second intermediate element and the output element.Type: GrantFiled: August 20, 2015Date of Patent: October 15, 2019Assignee: AISIN AW CO., LTD.Inventors: Yoshihiro Takikawa, Hiroki Nagai, Takao Sakamoto, Kazuhiro Itou
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Publication number: 20190301563Abstract: A rotary inertia mass damper of a damper device is configured to include a planetary gear that includes a driven member with outer teeth, first and second input plate member as a carrier which rotatably supports a plurality of pinion gears, and a ring gear that meshes with the plurality of pinion gears and works as the mass body. The outer teeth of the driven member are arranged to be disposed outside first and second springs in a radial direction of the damper device. The driven member, the plurality of pinion gears and the ring gear are arranged to at least partially overlap with the first and second springs as viewed in the radial direction. A motion of the ring gear in the axial direction is restricted by the plurality of pinion gears.Type: ApplicationFiled: June 17, 2019Publication date: October 3, 2019Applicants: AISIN AW INDUSTRIES CO., LTD, AISIN AW CO., LTD.Inventors: Takuya YOSHIKAWA, Aki OGAWA, Akiyoshi KATO, Ryosuke OTSUKA, Yoshihiro INOUE, Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Kazuhiro ITOU
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Publication number: 20190276090Abstract: A work vehicle including: a vehicle body frame; a prime mover part located on a front or rear part of the vehicle body frame; a bonnet configured to open and close by swinging, and covering the prime mover part; and an assist unit configured to assist the bonnet to operate to open. A lateral end portion of the vehicle body frame is provided with a first linkage part with which the assist unit is linked. A lateral end portion of a lower end part of the bonnet, which is located closer to an end cover than the first linkage part is, is provided with a second linkage part with which the assist unit is linked. The assist unit is provided with an expansion/contraction mechanism biased so as to expand, and is located laterally outside the prime mover part and spans the first linkage part and the second linkage part.Type: ApplicationFiled: May 29, 2019Publication date: September 12, 2019Inventors: Takeshi Komorida, Koichiro Matsumoto, Masaki Takaoka, Arisa Kimura, Tasuku Teraoka, Azusa Furihata, Tomohisa Yamamoto, Toshiki Kanai, Nobuyuki Yamashita, Masayuki Akita, Takashi Kumashiro, Ryo Matsumoto, Hiroki Nagai, Tatsuki Kago, Akihito Mihara
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Publication number: 20190257398Abstract: Provided is a vibration damping device including guide surfaces that are concave surfaces formed in a support member so as to curve toward the outer periphery of the support member; mass bodies that, as the support member rotates, roll on the guide surfaces while being pressed against the guide surfaces by a centrifugal force; and inertia rings that are rotatably coupled to the mass bodies and swing about the center of rotation of the support member. When the vibration damping device is in equilibrium, the center of gravity of each mass body is located radially outward of the joint position between the mass body and the inertia rings. As the support member rotates, the inertia rings swing relative to the support member about the center of rotation of the support member, and the mass bodies roll on the guide surfaces.Type: ApplicationFiled: September 8, 2017Publication date: August 22, 2019Applicant: AISIN AW CO., LTD.Inventors: Kazuyoshi ITO, Yoichi OI, Masaki WAJIMA, Hiroki NAGAI, Takao SAKAMOTO
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Patent number: 10377219Abstract: A tractor includes an engine that is mounted on a vehicle body frame, a hood that houses the engine and is configured to pivot about a front pivot in a top-bottom direction between a closed position at which the hood covers the engine, and an open position at which the hood exposes the engine, a mounting rubber that is provided between the engine and the vehicle body frame to support the engine in an anti-vibration manner, and a hood stay that supports the hood such that the hood is pivotable up/down about the front pivot. The hood stay includes an abutting-target portion against which the engine can abut from a rear side, to prevent the engine from swinging forward in a front-rear direction of the vehicle body.Type: GrantFiled: May 26, 2017Date of Patent: August 13, 2019Assignee: Kubota CorporationInventors: Tasuku Teraoka, Takeshi Komorida, Takashi Kumashiro, Shoichiro Nagaishi, Tomohisa Yamamoto, Akihito Mihara, Ryo Matsumoto, Hiroki Nagai, Yuto Akai, Yoshihisa Tonoya, Masaki Takaoka, Tatsuki Kago, Nobuyuki Yamashita, Junichi Yamanaka, Masahiro Izumi, Azusa Furihata, Koichiro Matsumoto, Takashi Shibata
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Patent number: 10371231Abstract: A damper device that includes an input element to which torque from an engine is transferred; an output element; a first intermediate element; a second intermediate element; a first elastic body that transfers torque between the input element and the first intermediate element; a second elastic body that transfers torque between the first intermediate element and the output element; a third elastic body that transfers torque between the input element and the second intermediate element; a fourth elastic body that transfers torque between the second intermediate element and the output element; and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element.Type: GrantFiled: March 31, 2016Date of Patent: August 6, 2019Assignee: AISIN AW CO., LTD.Inventors: Yoshihiro Takikawa, Hiroki Nagai, Masaki Wajima, Takao Sakamoto, Kazuhiro Itou, Nobuo Suzuki
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Patent number: 10364864Abstract: A damper device that includes an input element to which torque from an engine is transferred; an output element; a first intermediate element; a second intermediate element; a first elastic body that transfers torque between the input element and the first intermediate element; a second elastic body that transfers torque between the first intermediate element and the output element; a third elastic body that transfers torque between the input element and the second intermediate element; a fourth elastic body that transfers torque between the second intermediate element and the output element; and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element.Type: GrantFiled: June 8, 2016Date of Patent: July 30, 2019Assignee: AISIN AW CO., LTD.Inventors: Yoshihiro Takikawa, Hiroki Nagai, Masaki Wajima, Takao Sakamoto, Kazuhiro Itou, Nobuo Suzuki
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Publication number: 20190226552Abstract: In a vibration damping device 20, the moment of inertia J1 of a driven member 15, the moment of inertia J2 of an inertial mass body 23, the mass m of crank members 22, the distance L3 between the center of gravity G of the crank member 22 and the fulcrum of swinging of the crank member 22 with respect to the inertial mass body 23, and the distance L4 between this fulcrum and the center of rotation RC are determined so that torque fluctuation of an object for which vibration is to be damped, which is derived based on angular displacement and angles obtained by solving an equation of motion for the driven member 15 and an equation of motion for the entire vibration damping device 20 is equal to a target value.Type: ApplicationFiled: September 29, 2017Publication date: July 25, 2019Applicants: AISIN AW CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, Kagoshima UniversityInventors: Yoichi OI, Masaki WAJIMA, Hiroki NAGAI, Takao SAKAMOTO, Takahiro RYU, Takashi NAKAE, Kenichiro MATSUZAKI
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Publication number: 20190219140Abstract: A damper device that includes an input to which torque from an engine is transmitted, a first intermediate element, a second intermediate element, an output, a first elastic body that transmits the torque between the input and the first intermediate element, a second elastic body that transmits the torque between the first intermediate element and the output, a third elastic body that transmits the torque between the input and the second intermediate element, and a fourth elastic body that transmits the torque between the second intermediate element and the output.Type: ApplicationFiled: August 1, 2017Publication date: July 18, 2019Applicant: AISIN AW CO., LTD.Inventors: Kazuyoshi ITO, Hiroki NAGAI, Masaki WAJIMA, Kazuhiro ITOU
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Patent number: 10336377Abstract: A work vehicle including: a vehicle body frame; a prime mover part located on a front or rear part of the vehicle body frame; a bonnet configured to open and close by swinging, and covering the prime mover part; and an assist unit configured to assist the bonnet to operate to open. A lateral end portion of the vehicle body frame is provided with a first linkage part with which the assist unit is linked. A lateral end portion of a lower end part of the bonnet, which is located closer to an end cover than the first linkage part is, is provided with a second linkage part with which the assist unit is linked. The assist unit is provided with an expansion/contraction mechanism biased so as to expand, and is located laterally outside the prime mover part and spans the first linkage part and the second linkage part.Type: GrantFiled: November 8, 2016Date of Patent: July 2, 2019Assignee: Kubota CorporationInventors: Takeshi Komorida, Koichiro Matsumoto, Masaki Takaoka, Arisa Kimura, Tasuku Teraoka, Azusa Furihata, Tomohisa Yamamoto, Toshiki Kanai, Nobuyuki Yamashita, Masayuki Akita, Takashi Kumashiro, Ryo Matsumoto, Hiroki Nagai, Tatsuki Kago, Akihito Mihara
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Patent number: 10323716Abstract: A damper device includes first inner springs configured to transmit a torque between a drive member and an intermediate member, second inner springs configured to transmit a torque between the intermediate member and a driven member, and a rotary inertia mass damper including a sun gear serving as a mass body rotating with relative rotation of the drive member to the driven member. The rotary inertia mass damper is provided in parallel to a torque transmission path including the intermediate member, the first inner springs and the second inner springs. A damping ratio ? of the intermediate member determined based on a moment of inertia J2 of the intermediate member and rigidities k1 and k2 of the first and the second inner springs and is less than a value.Type: GrantFiled: December 25, 2015Date of Patent: June 18, 2019Assignees: AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTDInventors: Takuya Yoshikawa, Aki Ogawa, Tomonori Kinoshita, Yuji Kanyama, Makoto Yamaguchi, Kazuyoshi Ito, Hiroki Nagai, Masaki Wajima, Takao Sakamoto, Kazuhiro Itou, Yoshihiro Takikawa, Yoichi Oi
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Publication number: 20190178323Abstract: A vibration damping apparatus that includes a plurality of rotational elements including an input to which a torque from an engine is transferred, and an output; a first torsional stiffness mechanism arranged between the input and the output and having a positive torsional stiffness; and a second torsional stiffness mechanism configured to act in parallel to the first torsional stiffness mechanism between the input and the output and having a negative torsional stiffness, wherein the negative torsional stiffness of the second torsional stiffness mechanism increases on a negative side as a rotation speed of the engine increases.Type: ApplicationFiled: September 29, 2017Publication date: June 13, 2019Applicant: AISIN AW CO., LTD.Inventors: Kazuyoshi ITO, Yoichi OI, Masaki WAJIMA, Hiroki NAGAI, Takao SAKAMOTO
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Patent number: 10309483Abstract: A damper device with a first intermediate element; a second intermediate element; a first elastic body that transmits torque between the input element and the first intermediate element; a second elastic body that transmits torque between the first intermediate element and the output element; a third elastic body that transmits torque between the input element and the second intermediate element; a fourth elastic body that transmits torque between the second intermediate element and the output element; and a fifth elastic body that transmits torque between the first intermediate element and the second intermediate element.Type: GrantFiled: September 14, 2015Date of Patent: June 4, 2019Assignee: AISIN AW CO., LTD.Inventors: Yoshihiro Takikawa, Hiroki Nagai, Masaki Wajima, Takao Sakamoto, Kazuhiro Itou
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Publication number: 20190063505Abstract: First to fourth springs SP11 to SP22, two each of four types of springs, are disposed such that attachment radii r11 to r22, which are the distances from a central axis CA of a damper device to the axes of the respective first to fourth springs SP11 to SP22, are equal. Further, the first to fourth springs SP11 to SP22 are disposed such that the axes thereof are arranged in the same plane. With this arrangement, the four types of springs (first to fourth springs SP11 to SP22) can be compactly arranged, and the axial length of the damper device can be reduced.Type: ApplicationFiled: March 16, 2017Publication date: February 28, 2019Applicant: AISIN AW CO., LTD.Inventors: Kazuyoshi ITO, Hiroki NAGAI, Masaki WAJIMA, Kazuhiro ITOU
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Publication number: 20190048940Abstract: The overall size of a damper device having two transmission paths is reduced. A damper device including an input element to which torque from an engine is transmitted and an output element includes: a first intermediate element; a second intermediate element; a first elastic body disposed between the input element and the first intermediate element; a second elastic body disposed between the first intermediate element and the output element; a third elastic body disposed between the input element and the second intermediate element; a fourth elastic body disposed between the second intermediate element and the output element; and a fifth elastic body disposed between the first intermediate element and the second intermediate element, wherein attachment radii of the first to fourth elastic bodies are equal.Type: ApplicationFiled: March 15, 2017Publication date: February 14, 2019Applicant: AISIN AW CO., LTD.Inventors: Kazuyoshi ITO, Hiroki NAGAI, Masaki WAJIMA, Kazuhiro ITOU
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Publication number: 20190040915Abstract: A damper device that includes an input to which torque from an engine is transmitted; an output; a first intermediate element; a second intermediate element; a first transmission member that transmits torque between the input and the first intermediate element; a second transmission member that transmits torque between the first intermediate element and the output; a third transmission member that transmits torque between the input and the second intermediate element; a fourth transmission member that transmits torque between the second intermediate element and the output; and a fifth transmission member that transmits torque between the first intermediate element and the second intermediate element, wherein at least one of the first, second, third, fourth, and fifth transmission members has variable stiffness that tends to increase as a rotation speed of the damper device increases.Type: ApplicationFiled: March 16, 2017Publication date: February 7, 2019Applicant: AISIN AW CO., LTD.Inventors: Kazuyoshi ITO, Masaki WAJIMA, Hiroki NAGAI
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Publication number: 20190024752Abstract: A vibration damping device including: a support member rotating with a rotary element to which torque from an engine is transferred about the center of rotation of the rotary element; a restoring force generation member coupled to the support member and swingable with rotation of the support member; and an inertial mass body coupled to the support member via the restoring force generation member and swung about the center of rotation in conjunction with the restoring force generation member with rotation of the support member. The order of the vibration damping device is larger than the sum of the excitation order of the engine and an offset value determined in consideration of the effect of oil in the oil chamber. The reference order, which is a convergent value of the order of the vibration damping device, is higher than the excitation order.Type: ApplicationFiled: March 16, 2017Publication date: January 24, 2019Applicant: AISIN AW CO., LTD.Inventors: Yoichi OI, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO
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Publication number: 20190020056Abstract: The present invention aims to provide a lithium ion secondary cell configured to be charged by light such as solar light (particularly, UV light (for example, light having a wavelength of 350 nm to 400 nm)). The present invention relates to a lithium ion secondary cell including: a pair of substrates, at least one of the substrates being light transmitting; an electrolyte filled between the pair of substrates; a positive electrode that includes a positive electrode material selected from lithium-containing metal oxides and that is disposed to contact the electrolyte; and a negative electrode that includes a negative electrode material selected from n-type semiconductor materials and that is disposed to contact the electrolyte.Type: ApplicationFiled: October 2, 2015Publication date: January 17, 2019Applicant: Kogakuin UniversityInventors: Hiroki NAGAI, Mitsunobu SATO
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Publication number: 20190003554Abstract: A vibration damping device 20 includes: a crank member 22 that is swingable along with rotation of a driven member 15 to which torque from an engine EG is transferred; and an inertial mass body 23 coupled to the driven member 15 via the crank member 22 and swung about a center of rotation RC in conjunction with the crank member 22 along with rotation of the driven member 15. The vibration damping device 20 is designed such that an effective order qeff becomes higher as the amplitude of vibration of input torque transferred from the engine EG to the driven member 15 becomes larger.Type: ApplicationFiled: March 16, 2017Publication date: January 3, 2019Applicant: AISIN AW CO., LTD.Inventors: Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Takuya FUKUOKA, Yoichi OI