Patents by Inventor Kazutaka Asabe
Kazutaka Asabe 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: 11674206Abstract: There is provided a sintered friction material for railway vehicles that has excellent frictional properties and wear resistance even in a high speed range of 280 km/hour or more. The sintered friction material for railway vehicles is a green compact sintered material containing, in mass %, Cu: 50.0 to 75.0%, graphite: 5.0 to 15.0%, one or more selected from the group consisting of magnesia, zircon sand, silica, zirconia, mullite, and silicon nitride: 1.5 to 15.0%, one or more selected from the group consisting of W and Mo: 3.0 to 30.0%, and one or more selected from the group consisting of ferrochromium, ferrotungsten, ferromolybdenum, and stainless steel: 2.0 to 20.0%, with the balance being impurities.Type: GrantFiled: November 30, 2017Date of Patent: June 13, 2023Assignees: NIPPON STEEL CORPORATION, FINE SINTER CO., LTD.Inventors: Manabu Kubota, Kazutaka Asabe, Yuki Ichikawa, Takeshi Nakano, Tokitake Okahira, Isao Shimazoe
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Patent number: 11534829Abstract: A sintered friction material is formed by pressure sintering mixed powder at 800° C. or above, the mixed powder consisting of, in mass %, Cu and/or Cu alloy: 40.0 to 80.0%, Ni: 0% or more and less than 5.0%, Sn: 0 to 10.0%, Zn: 0 to 10.0%, VC: 0.5 to 5.0%, Fe and/or Fe alloy: 2.0 to 40.0%, lubricant: 5.0 to 30.0%, metal oxide and/or metal nitride: 1.5 to 30.0%, and the balance being impurity.Type: GrantFiled: April 7, 2017Date of Patent: December 27, 2022Assignees: NIPPON STEEL CORPORATION, FINE SINTER CO., LTD.Inventors: Manabu Kubota, Naomitsu Mizui, Fumio Ishimoto, Kazutaka Asabe, Osamu Kanda, Satoru Nakano, Takeshi Nakano, Kazumichi Kawasaki, Isao Shimazoe
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Patent number: 11434964Abstract: 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: GrantFiled: December 21, 2016Date of Patent: September 6, 2022Assignees: NIPPON STEEL CORPORATION, FINE SINTER CO., LTD.Inventors: Takahiro Fujimoto, Atsushi Sakaguchi, Kazutaka Asabe, Kazumichi Kawasaki, Takeshi Nakano, Tokitake Okahira, Yasushi Karino, Hajime Takami
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Publication number: 20200124122Abstract: 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: ApplicationFiled: December 21, 2016Publication date: April 23, 2020Inventors: Takahiro FUJIMOTO, Yuiko SAKAYAMA, Atsushi SAKAGUCHI, Kazutaka ASABE, Takeshi NAKANO, Makoto IKEDA, Isao SHIMAZOE, Yasushi KARINO, Hajime TAKAMI
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Publication number: 20200038959Abstract: A sintered friction material is formed by pressure sintering mixed powder at 800° C. or above, the mixed powder consisting of, in mass %, Cu and/or Cu alloy: 40.0 to 80.0%, Ni: 0% or more and less than 5.0%, Sn: 0 to 10.0%, Zn: 0 to 10.0%, VC: 0.5 to 5.0%, Fe and/or Fe alloy: 2.0 to 40.0%, lubricant: 5.0 to 30.0%, metal oxide and/or metal nitride: 1.5 to 30.0%, and the balance being impurity.Type: ApplicationFiled: April 7, 2017Publication date: February 6, 2020Applicants: NIPPON STEEL CORPORATION, FINE SINTER CO., LTD.Inventors: Manabu KUBOTA, Naomitsu MIZUI, Fumio ISHIMOTO, Kazutaka ASABE, Osamu KANDA, Satoru NAKANO, Takeshi NAKANO, Kazumichi KAWASAKI, Isao SHIMAZOE
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Publication number: 20190359233Abstract: The disk brake device includes a brake disk, a brake lining, and a brake caliper. The brake lining includes a friction member and a base plate for supporting the friction member. When a plurality of bolt holes are projected onto a rear face of the base plate in a direction of an axle, a boundary passes through areas of the projected bolt holes. The brake caliper includes an inner pressing surface that applies a load on an inner area and an outer pressing surface that applies a load on an outer area. The load applied on the inner area from the inner pressing surface is different from the load applied on the outer area from the outer pressing surface. In this way, it is possible to suppress stress imposed on bolts while suppressing a local temperature rise in the brake disk.Type: ApplicationFiled: December 26, 2017Publication date: November 28, 2019Inventors: Takanori KATO, Atsushi SAKAGUCHI, Kazutaka ASABE, Naruo MIYABE
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Publication number: 20190292634Abstract: There is provided a sintered friction material for railway vehicles that has excellent frictional properties and wear resistance even in a high speed range of 280 km/hour or more. The sintered friction material for railway vehicles is a green compact sintered material containing, in mass %, Cu: 50.0 to 75.0%, graphite: 5.0 to 15.0%, one or more selected from the group consisting of magnesia, zircon sand, silica, zirconia, mullite, and silicon nitride: 1.5 to 15.0%, one or more selected from the group consisting of W and Mo: 3.0 to 30.0%, and one or more selected from the group consisting of ferrochromium, ferrotungsten, ferromolybdenum, and stainless steel: 2.0 to 20.0%, with the balance being impurities.Type: ApplicationFiled: November 30, 2017Publication date: September 26, 2019Inventors: Manabu KUBOTA, Kazutaka ASABE, Yuki ICHIKAWA, Takeshi NAKANO, Tokitake OKAHIRA, Isao SHIMAZOE
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Patent number: 10259475Abstract: A railway wheel includes: a wheel including a plate portion; and a brake disc including a circular plate portion whose front face side is a sliding surface, and a plurality of fin portions which are radially projected on a back face of the circular plate portion, wherein two of the brake discs are fastened in a region within the sliding surface. Regarding an area of a section crossing a space between the brake disc and the wheel along a circumferential direction, a minimum section portion in which the sectional area is minimum is present in a region formed by an outer peripheral surface of the circular plate portion and an inner peripheral surface of the rim portion, and the outer peripheral surface of the circular plate portion follows the inner peripheral surface of the rim portion in a region extending to the outer side from the minimum section portion.Type: GrantFiled: February 3, 2015Date of Patent: April 16, 2019Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Hiroshi Nogami, Takahiro Fujimoto, Yuiko Sakayama, Atsushi Sakaguchi, Kazutaka Asabe
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Patent number: 10260585Abstract: A brake disc of the present invention is a brake disc that stops the rotation of an axle when a brake pad is pressed on a surface of the brake disc, including a disc main body that is attached to a rotary body integrally rotating with the axle; and a plurality of build-up layers laminated on a surface of the disc main body, in which the build-up layers are laminated on the surface of the disc main body by means of laser metal deposition welding.Type: GrantFiled: September 12, 2014Date of Patent: April 16, 2019Assignees: RAILWAY TECHNICAL RESEARCH INSTITUTE, NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Shin-ichi Saga, Yasushi Karino, Kazutaka Asabe, Atsushi Sakaguchi, Mikio Yoneyama, Yoshihiro Tatsumi
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Publication number: 20190024735Abstract: 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: ApplicationFiled: December 21, 2016Publication date: January 24, 2019Inventors: Takahiro FUJIMOTO, Atsushi SAKAGUCHI, Kazutaka ASABE, Kazumichi KAWASAKI, Takeshi NAKANO, Tokitake OKAHIRA, Yasushi KARINO, Hajime TAKAMI
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Patent number: 10030725Abstract: A brake lining for a railroad car has a frictional surface on a brake disc that is pressed by a brake caliper. Friction bodies are pressed against the frictional surface of the brake disc and a back plate is mounted to the caliper to support the friction bodies. Each of the friction bodies is formed with a friction material which contacts the brake disc frictional surface, and has a base plate attached on the back plate side of the friction material. The base plate has a protrusion formed on its back side. On the friction body side of the back plate there is formed a groove which contacts the protrusion formed on the base plate. A disc spring or a spherical-seated structure is disposed between the base plate of each friction body and the back plate. Friction bodies are prevented from rotating at their attached places, without adding new components.Type: GrantFiled: September 6, 2012Date of Patent: July 24, 2018Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, FINE SINTER CO., LTD.Inventors: Takanori Kato, Atsushi Sakaguchi, Kazutaka Asabe, Takashi Maejima, Satoru Nakano, Takeshi Nakano
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Publication number: 20170008336Abstract: A railway wheel includes: a wheel including a plate portion; and a brake disc including a circular plate portion whose front face side is a sliding surface, and a plurality of fin portions projected on a back face of the circular plate portion, wherein two of the brake discs are fastened in a region within the sliding surface. Regarding an area of a section crossing a space formed between the brake disc and the wheel along a circumferential direction, a minimum section portion in which the sectional area is minimum is present closest to the back face within the outer peripheral surface of the circular plate portion within a region formed by an outer peripheral surface of the circular plate portion and an inner peripheral surface of the rim portion, and an area of the minimum section portion is not less than 2500 mm2 and not more than 7000 mm2.Type: ApplicationFiled: February 3, 2015Publication date: January 12, 2017Inventors: Yuiko SAKAYAMA, Hiroshi NOGAMI, Takahiro FUJIMOTO, Atsushi SAKAGUCHI, Kazutaka ASABE
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Publication number: 20160339932Abstract: A railway wheel includes: a wheel including a plate portion; and a brake disc including a circular plate portion whose front face side is a sliding surface, and a plurality of fin portions which are radially projected on a back face of the circular plate portion, wherein two of the brake discs are fastened in a region within the sliding surface. Regarding an area of a section crossing a space between the brake disc and the wheel along a circumferential direction, a minimum section portion in which the sectional area is minimum is present in a region formed by an outer peripheral surface of the circular plate portion and an inner peripheral surface of the rim portion, and the outer peripheral surface of the circular plate portion follows the inner peripheral surface of the rim portion in a region extending to the outer side from the minimum section portion.Type: ApplicationFiled: February 3, 2015Publication date: November 24, 2016Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Hiroshi NOGAMI, Takahiro FUJIMOTO, Yuiko SAKAYAMA, Atsushi SAKAGUCHI, Kazutaka ASABE
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Publication number: 20160223041Abstract: A brake disc of the present invention is a brake disc that stops the rotation of an axle when a brake pad is pressed on a surface of the brake disc, including a disc main body that is attached to a rotary body integrally rotating with the axle; and a plurality of build-up layers laminated on a surface of the disc main body, in which the build-up layers are laminated on the surface of the disc main body by means of laser metal deposition welding.Type: ApplicationFiled: September 12, 2014Publication date: August 4, 2016Applicants: RAILWAY TECHNICAL RESEARCH INSTITUTE, NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Shin-ichi SAGA, Yasushi KARINO, Kazutaka ASABE, Atsushi SAKAGUCHI, Mikio YONEYAMA, Yoshihiro TATSUMI
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Patent number: 9400024Abstract: A railway vehicle brake disc which can reduce aerodynamic sound raised high speed running, improve cooling performance during braking, and improve durability comprises a donut-shaped disc section having a sliding surface on a front surface side, a plurality of fin sections, each convexly provided in a rear surface of the disc section in a radial pattern, and a bolt hole passing through the disc section and the fin section. The disc section is mounted on a wheel in a state where the fin sections contact a plate section of the wheel using a bolt inserted into the bolt hole. The fin section has a groove formed along a circumferential direction in at least one of an area on an inner peripheral side and an area on an outer peripheral side of the bolt hole when viewed in a radial direction of the disc section.Type: GrantFiled: September 5, 2013Date of Patent: July 26, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Hiroshi Nogami, Go Adachi, Kazutaka Asabe, Atsushi Sakaguchi, Kenji Tamura, Takanori Kato
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Patent number: 9394953Abstract: A disc brake for railway vehicles includes a brake disc fixed to a wheel or an axle of a railway vehicle and a brake lining configured to be pressed against a frictional surface of the brake disc by a brake caliper. The brake lining includes a plurality of friction members arranged to be spaced from each other, each of the friction members having a surface that faces the frictional surface of the brake disc, a metallic backing secured to back surfaces of the friction members, and a base plate supporting the friction members on the back surface side via spring members. The base plate is mounted to a brake caliper; wherein the friction members are provided in pairs with each pair being formed by two adjacent ones of the friction members, and the metallic backing is a one-piece member provided for each pair of the friction members.Type: GrantFiled: May 31, 2012Date of Patent: July 19, 2016Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, RAILWAY TECHNICAL RESEARCH INSTITUTE, FINE SINTER CO., LTD.Inventors: Takanori Kato, Takahiro Fujimoto, Kazutaka Asabe, Atsushi Sakaguchi, Yasushi Karino, Shin-ichi Saga, Takashi Maejima, Satoru Nakano, Takeshi Nakano
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Publication number: 20160047016Abstract: A sintered friction material for use in a high-speed railway is manufactured using a Cu alloy powder produced using an atomizing method from a Cu alloy containing 0.1 to 2.0 mass % of Fe. This friction material has both sufficient high strength and high thermal conductivity.Type: ApplicationFiled: March 24, 2014Publication date: February 18, 2016Inventors: Futoshi KATSUKI, Fumio ISHIMOTO, Osamu KANDA, Kazutaka ASABE, Go ADACHI, Toshiyuki FUJII
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Patent number: 9169886Abstract: A brake disc for a railway vehicle, including a ring-shaped plate portion with a front side serving as a frictional surface and a plurality of fins being projected and disposed radially on the back side of the plate portion, the plate portion being fixed to a wheel, wherein a rib is provided between fins adjacent to each other, and a slit developing in the direction from a wheel-side face of the rib toward the back side of the plate portion is disposed in a circumferentially intermediate portion of the rib, thereby making it possible to suppress the deformation caused by frictional heat.Type: GrantFiled: May 2, 2014Date of Patent: October 27, 2015Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Takahiro Fujimoto, Kazutaka Asabe, Takanori Kato, Hiroshi Nogami, Hirotoshi Kawabe
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Publication number: 20150247541Abstract: A railway vehicle brake disc which can reduce aerodynamic sound raised high speed running, improve cooling performance during braking, and improve durability comprises a donut-shaped disc section having a sliding surface on a front surface side, a plurality of fin sections, each convexly provided in a rear surface of the disc section in a radial pattern, and a bolt hole passing through the disc section and the fin section. The disc section is mounted on a wheel in a state where the fin sections contact a plate section of the wheel using a bolt inserted into the bolt hole. The fin section has a groove formed along a circumferential direction in at least one of an area on an inner peripheral side and an area on an outer peripheral side of the bolt hole when viewed in a radial direction of the disc section.Type: ApplicationFiled: September 5, 2013Publication date: September 3, 2015Inventors: Hiroshi Nogami, Go Adachi, Kazutaka Asabe, Atsushi Sakaguchi, Kenji Tamura, Takanori Kato
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Patent number: D793282Type: GrantFiled: April 21, 2016Date of Patent: August 1, 2017Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, CENTRAL JAPAN RAILWAY COMPANYInventors: Takahiro Fujimoto, Takanori Kato, Yuiko Sakayama, Atsushi Sakaguchi, Kazutaka Asabe, Naruo Miyabe, Tomohiro Otsuka, Seiji Kanamori, Jun Asano