Patents by Inventor Takahiro Fujimoto

Takahiro Fujimoto 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).

  • Patent number: 12031597
    Abstract: A brake disk unit includes a rotating member, a brake disk, and a control member. The brake disk includes a disk main body, fins, and convex portions and/or concave portions. The control member includes a support portion and a projecting portion. At least a part of the projecting portion is arranged between fins that are adjacent in the circumferential direction of the brake disk. A gap is formed between the projecting portion and the brake disk. On the surface of the brake disk, the convex portions and/or the concave portions are provided further on the outer side in the radial direction of the brake disk than a minimum opening portion of the gap.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: July 9, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroshi Nogami, Takahiro Fujimoto, Yuiko Shiotani, Ryuichi Nishimura, Mitsuhiro Okamoto, Kumpei Sano, Naruo Miyabe, Yuki Ichikawa
  • Publication number: 20240191762
    Abstract: A disc brake device includes a rotary member, a brake disc, and a control member. The brake disc includes a disc body having an annular shape and fins. The control member controls an airflow rate between the fins disposed adjacent to each other in a circumferential direction of the brake disc. The control member includes a base plate and a protruding portion. The protruding portion protrudes from the base plate toward the disc body. A top surface of each fin has a recessed portion. The protruding portion extends in the circumferential direction through from the recessed portion of one of the fins disposed adjacent to each other to the recessed portion of the other of the fins.
    Type: Application
    Filed: May 14, 2021
    Publication date: June 13, 2024
    Inventors: Takahiro FUJIMOTO, Yuiko SHIOTANI, Hiroshi NOGAMI, Ryuichi NISHIMURA, Takanori KATO, Yuki ICHIKAWA, Naruo MIYABE
  • Publication number: 20240183415
    Abstract: A disc brake device includes a rotary member, a brake disc, a control member, and a fastening member. The brake disc includes a disc body having an annular shape and a plurality of fins. The control member includes a base plate and a protruding portion, and controls an airflow rate between the fins disposed adjacent to each other. At least one of the fins has a fastening hole including a small diameter portion. The base plate has a through hole. A shaft portion of the fastening member is inserted through the small diameter portion and the through hole. A peripheral edge of the through hole is disposed on an outer circumferential side of a peripheral edge of the small diameter portion.
    Type: Application
    Filed: May 14, 2021
    Publication date: June 6, 2024
    Inventors: Takahiro FUJIMOTO, Yuiko SHIOTANI, Takanori KATO, Hiroshi NOGAMI, Yuki ICHIKAWA, Naruo MIYABE
  • Publication number: 20240159282
    Abstract: A brake disc includes a disc body and a plurality of fins. The plurality of fins are disposed on one surface of the disc body such that each of the fins extends from an inner peripheral side toward an outer peripheral side of the disc body. Each of the fins includes two side surfaces and a top surface. Among the plurality of fins, at least one fin includes a plurality of protruding ridge portions. The plurality of protruding ridge portions are arranged in a radial direction of the disc body on at least one side surface of the two side surfaces of the fin. Each of the protruding ridge portions extends between the disc body and the top surface of the fin.
    Type: Application
    Filed: March 30, 2022
    Publication date: May 16, 2024
    Inventors: Mitsuhiro OKAMOTO, Hiroshi NOGAMI, Takahiro FUJIMOTO, Yuki ICHIKAWA, Naruo MIYABE, Takanori KATO
  • Patent number: 11578775
    Abstract: There is provided a brake lining for a railway vehicle that can reduce brake squeal in braking. A brake lining for a railway vehicle is used for a disc brake system of a railway vehicle. This brake lining includes a base plate, a sintered friction material, and a friction material supporting mechanism. The friction material supporting mechanism is disposed between the base plate and the sintered friction material and supports the sintered friction material in such a manner that the sintered friction material can move with respect to the base plate. The sintered friction material has a Young's modulus of 35.0 GPa or more.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: February 14, 2023
    Assignees: NIPPON STEEL CORPORATION, FINE SINTER CO., LTD.
    Inventors: Takahiro Fujimoto, Manabu Kubota, Takanori Kato, Atsushi Sakaguchi, Naruo Miyabe, Takeshi Nakano, Tokitake Okahira, Isao Shimazoe
  • Publication number: 20230029718
    Abstract: A method for manufacturing a sliding member according to one aspect of the present disclosure is a method for manufacturing a sliding member containing an ethylene-tetrafluoroethylene copolymer as a main component, and comprises processing a material containing an ethylene-tetrafluoroethylene copolymer as a main component, and irradiating a processed body obtained in the processing step with an electron beam.
    Type: Application
    Filed: November 20, 2020
    Publication date: February 2, 2023
    Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Fine Polymer, Inc.
    Inventors: Masato BABA, Hisashi OOGI, Kouichi KAMIOKA, Takahiro FUJIMOTO
  • Patent number: 11480223
    Abstract: An aerodynamic noise reduction member 30 includes: a plate-like support portion 32 sandwiched between a plurality of fins 24 and 26 of a brake disk 20 and a rotating member 102 of a railroad vehicle; and a plurality of protruding portions 34 protruding from the support portion 32. Each of the plurality of protruding portions 34 is provided in such a manner that, in a state in which the support portion 32 is sandwiched between the plurality of fins 24 and 26 and the rotating member 102, each of the protruding portions 34 partially occludes between the fastening fin 24 and the anchoring fin 26 adjacent to each other in a circumferential direction of the brake disk 20.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: October 25, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Osamu Kondo, Takahiro Fujimoto, Takanori Kato, Atsushi Sakaguchi, Yuki Ichikawa
  • Publication number: 20220333656
    Abstract: A brake disk unit includes a rotating member, a brake disk, and a control member. The brake disk includes a disk main body, fins, and convex portions and/or concave portions. The control member includes a support portion and a projecting portion. At least a part of the projecting portion is arranged between fins that are adjacent in the circumferential direction of the brake disk. A gap is formed between the projecting portion and the brake disk. On the surface of the brake disk, the convex portions and/or the concave portions are provided further on the outer side in the radial direction of the brake disk than a minimum opening portion of the gap.
    Type: Application
    Filed: September 9, 2020
    Publication date: October 20, 2022
    Inventors: Hiroshi NOGAMI, Takahiro FUJIMOTO, Yuiko SHIOTANI, Ryuichi NISHIMURA, Mitsuhiro OKAMOTO, Kumpei SANO, Naruo MIYABE, Yuki ICHIKAWA
  • Patent number: 11466737
    Abstract: A brake disc for a railway vehicle includes: a disc plate portion that has a sliding portion of a front face; a plurality of radial fins that are provided on the rear face of a disc plate portion, and that have a shape that extends in the radial direction of the disc plate portion; and a circumferential rib that is provided between each pair of adjacent radial fins, and that has a shape that extends in the circumferential direction of the disc plate portion. A flow path for air is formed between the pair of radial fins, and the flow path for air is narrowed by the circumferential rib. On the circumferential rib, a gradual slope for suppressing fluctuations in an airflow that passes between the pair of radial fins is provided from a base part to a top part.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: October 11, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Nobuo Shiraishi, Yusuke Wakabayashi, Takeshi Kurita, Takanori Kato, Takahiro Fujimoto, Hiroshi Nogami, Atsushi Sakaguchi, Yuki Ichikawa
  • Patent number: 11434964
    Abstract: This brake lining includes: a plurality of friction members which are arranged to be spaced from each other, each of the friction members having a front surface that is to face a sliding surface of a brake disk; a back board fastened to a back surface of each of the friction members; a base plate that supports each of the friction members at a region including a center portion of each friction member; and an elastic member disposed between the base plate and the back board, on a back surface side of each friction member. Two friction members that are adjacent to each other are taken as a pair, and the back board is fastened to each of the pairs of friction members. In each pair of friction members, the two friction members are arranged along the circumferential direction of the brake disk.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 6, 2022
    Assignees: NIPPON STEEL CORPORATION, FINE SINTER CO., LTD.
    Inventors: Takahiro Fujimoto, Atsushi Sakaguchi, Kazutaka Asabe, Kazumichi Kawasaki, Takeshi Nakano, Tokitake Okahira, Yasushi Karino, Hajime Takami
  • Patent number: 11072395
    Abstract: A watercraft includes a vessel body, a marine propulsion device and a guide. The marine propulsion device is attached to the vessel body and includes a water stream generator that propels the vessel body. The guide is provided on the vessel body and extends astern of the vessel body and toward a center of the vessel body in a width direction of the vessel body from a position located sideward of the water stream generator. The guide inwardly directs water flowing on one lateral side of the vessel body such that confluent timing of the water flowing on the one lateral side of the vessel body and water flowing on the other lateral side of the vessel body is caused to occur earlier than when the guide is not provided on the vessel body.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: July 27, 2021
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Susumu Shibayama, Nobuharu Ota, Takahiro Fujimoto
  • Patent number: 11059322
    Abstract: The wheel is for a railway vehicle that travels on a rail. The wheel includes a wheel tread, a flange and a throat portion. The wheel tread is provided at an outer circumferential portion of the wheel. The wheel tread faces a head surface of the rail. The flange is provided at the outer circumferential portion of the wheel. The flange projects further outward than the wheel tread in the radial direction of the wheel. The throat portion connects the surface of the flange and the wheel tread. The throat portion has a protrusion. The protrusion projects to the rail side. The protrusion extends along the entire circumference of the throat portion.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: July 13, 2021
    Assignees: NIPPON STEEL CORPORATION, UNIVERSITY OF IOWA RESEARCH FOUNDATION
    Inventors: Yohsuke Yamazaki, Osamu Kondo, Takanori Kato, Takahiro Fujimoto, Hiroyuki Sugiyama, Christofer Feldmeier
  • Publication number: 20210199166
    Abstract: Disclosed is a brake disc for a railway vehicle including: a disc plate portion with a sliding portion in a surface; and a through hole that penetrates the disc plate portion from a front surface to a back surface of the disc plate portion, in which a bolt for fastening the disc plate portion to a wheel of the railway vehicle is inserted. An inclined surface is formed at an edge of an opening of the through hole at a front side of the disc plate portion, and the inclined surface extends larger in a circumferential direction of the disc plate portion than in a radial direction of the disc plate portion.
    Type: Application
    Filed: March 14, 2018
    Publication date: July 1, 2021
    Inventors: Nobuo SHIRAISHI, Yusuke WAKABAYASHI, Takeshi KURITA, Atsushi SAKAGUCHI, Takahiro FUJIMOTO, Hiroshi NOGAMI, Takanori KATO, Yuki ICHIKAWA
  • Publication number: 20210180660
    Abstract: There is provided a brake lining for railway vehicle that can reduce brake squeal in braking. A brake lining for railway vehicle is used for a disc brake system of a railway vehicle. This brake lining includes a base plate, a sintered friction material, and a friction material supporting mechanism. The friction material supporting mechanism is disposed between the base plate and the sintered friction material and supports the sintered friction material in such a manner that the sintered friction material can move with respect to the base plate. The sintered friction material has a Young's modulus of 35.0 GPa or more.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 17, 2021
    Inventors: Takahiro FUJIMOTO, Manabu KUBOTA, Takanori KATO, Atsushi SAKAGUCHI, Naruo MIYABE, Takeshi NAKANO, Tokitake OKAHIRA, Isao SHIMAZOE
  • Publication number: 20210025465
    Abstract: An aerodynamic noise reduction member 30 includes: a plate-like support portion 32 sandwiched between a plurality of fins 24 and 26 of a brake disk 20 and a rotating member 102 of a railroad vehicle; and a plurality of protruding portions 34 protruding from the support portion 32. Each of the plurality of protruding portions 34 is provided in such a manner that, in a state in which the support portion 32 is sandwiched between the plurality of fins 24 and 26 and the rotating member 102, each of the protruding portions 34 partially occludes between the fastening fin 24 and the anchoring fin 26 adjacent to each other in a circumferential direction of the brake disk 20.
    Type: Application
    Filed: April 2, 2019
    Publication date: January 28, 2021
    Inventors: Osamu KONDO, Takahiro FUJIMOTO, Takanori KATO, Atsushi SAKAGUCHI, Yuki ICHIKAWA
  • Patent number: 10704625
    Abstract: A brake disc for a railway vehicle is provided in which noise arising from the brake disc during high-speed rotation of a wheel is reduced by a large margin. A brake disc for a railway vehicle includes: a disc plate portion that has a sliding portion on a front face thereof; a plurality of through-holes that pass from the front face to a rear face of the disc plate portion and are arranged in alignment in the circumferential direction of the disc plate portion, the through-holes allowing bolts to pass therethrough for fastening together the disc plate portion and a wheel of the railway vehicle; and a groove provided to link a plurality of through-holes on the front face side of the disc plate portion.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: July 7, 2020
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Nobuo Shiraishi, Yusuke Wakabayashi, Takeshi Kurita, Takahiro Fujimoto, Hiroshi Nogami, Atsushi Sakaguchi, Takanori Kato, Yuki Ichikawa
  • Patent number: 10670094
    Abstract: A brake lining includes friction structures, back boards fastened to respective the friction structures, a base plate supporting the friction structures. Each of the friction structures includes two adjacent friction portions with a groove formed in the front surface in between, and a thin portion with a smaller thickness than thicknesses of the friction portions, the thin portion located in a position corresponding to the groove. Each of the friction structures is supported by the base plate on two support points located in the two friction portions respectively. The thin portion has a constant length, the length being equal to a maximum width of the friction portions and satisfying a condition that L/D is equal to or greater than 1.1, where D denotes the length of the thin portion and L denotes a distance between the two support points located in the friction portions.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: June 2, 2020
    Assignees: NIPPON STEEL CORPORATION, CENTRAL JAPAN RAILWAY COMPANY
    Inventors: Takahiro Fujimoto, Atsushi Sakaguchi, Naruo Miyabe, Tomohiro Otsuka, Seiji Kanamori, Jun Asano
  • Publication number: 20200124122
    Abstract: A brake lining is provided that is to be pressed against a sliding surface of a brake disk fastened to a wheel or an axle of a railway vehicle. The brake lining includes: a plurality of friction members arranged to be spaced from each other, each of the friction members having a front surface that is to face the sliding surface; a back board fastened to a back surface of each of the friction members; and a base plate supporting each friction member at a region including a center portion of the respective friction members. Two friction members are taken as a pair, and the back board that is fastened to the pair of friction members is a one-piece member, and a width of the back board at a space between the friction members of the pair of friction members is greater than a width of the friction member.
    Type: Application
    Filed: December 21, 2016
    Publication date: April 23, 2020
    Inventors: Takahiro FUJIMOTO, Yuiko SAKAYAMA, Atsushi SAKAGUCHI, Kazutaka ASABE, Takeshi NAKANO, Makoto IKEDA, Isao SHIMAZOE, Yasushi KARINO, Hajime TAKAMI
  • Publication number: 20200062030
    Abstract: The wheel is for a railway vehicle that travels on a rail. The wheel includes a wheel tread, a flange and a throat portion. The wheel tread is provided at an outer circumferential portion of the wheel. The wheel tread faces a head surface of the rail. The flange is provided at the outer circumferential portion of the wheel. The flange projects further outward than the wheel tread in the radial direction of the wheel. The throat portion connects the surface of the flange and the wheel tread. The throat portion has a protrusion. The protrusion projects to the rail side. The protrusion extends along the entire circumference of the throat portion.
    Type: Application
    Filed: August 23, 2018
    Publication date: February 27, 2020
    Inventors: Yohsuke Yamazaki, Osamu Kondo, Takanori Kato, Takahiro Fujimoto, Hiroyuki Sugiyama, Christofer Feldmeier
  • Publication number: 20190217921
    Abstract: A watercraft includes a vessel body, a marine propulsion device and a guide. The marine propulsion device is attached to the vessel body and includes a water stream generator that propels the vessel body. The guide is provided on the vessel body and extends astern of the vessel body and toward a center of the vessel body in a width direction of the vessel body from a position located sideward of the water stream generator. The guide inwardly directs water flowing on one lateral side of the vessel body such that confluent timing of the water flowing on the one lateral side of the vessel body and water flowing on the other lateral side of the vessel body is caused to occur earlier than when the guide is not provided on the vessel body.
    Type: Application
    Filed: July 16, 2018
    Publication date: July 18, 2019
    Inventors: Susumu SHIBAYAMA, Nobuharu OTA, Takahiro FUJIMOTO