Patents by Inventor Manabu Kubota

Manabu Kubota 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: 11407281
    Abstract: A heat management device may include: a first heat circuit; a second heat circuit; a heat exchanger configured to cool the first heat circuit and heat the second heat circuit; air-heating apparatus configured to heat air using the second heat circuit; a battery and electrical apparatus configured to be cooled by the first heat circuit; and a radiator configured to exchange heat between the first heat circuit and outside air. A controller may be configured, in the second process, to cause the heat exchanger to cool the heat exchanger passage while a heat medium circulates in the heat exchanger passage and the battery passage and bypasses the radiator passage. The controller may be configured, in the third process, to cause the radiator to cool the heat medium while the heat medium circulates in the radiator passage and the electrical apparatus passage and bypasses the heat exchanger passage.
    Type: Grant
    Filed: February 23, 2021
    Date of Patent: August 9, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUBARU CORPORATION
    Inventors: Kohji Kinoshita, Shoma Hanano, Yoshio Hasegawa, Manabu Orihashi, Hideyuki Kawai, Kenichi Kubota, Makoto Ikegami, Yuuki Kimura
  • Patent number: 11399454
    Abstract: A working vehicle includes a vehicle body to travel, a steering handle to be turned to steer the vehicle body, and a steering switch to steer the vehicle body separately from the steering handle. The steering switch may be a switch to be operated in a pressing manner or in a sliding manner to steer the vehicle body. In addition, the steering switch may be arranged around the steering handle.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: August 2, 2022
    Assignee: KUBOTA CORPORATION
    Inventors: Shunsuke Miyashita, Kenichi Iwami, Hiroki Suga, Yuki Kubota, Toru Tambo, Kunihiko Nishino, Yasuaki Morioka, Kumiko Kobayashi, Misako Kawai, Manabu Togo, Yoshihiko Kuroshita
  • Publication number: 20220182411
    Abstract: A plant control system and communication method are capable of immediately dealing with wrong address settings created due to a human error during the execution of an opening procedure. In the plant control system, a higher-level device and a plurality of communication terminal devices are connected to each other through a communication path. Prior to the start of communication, a communication opening process of sequentially transmitting a call signal from the higher-level device to the terminal devices and acknowledging response signals therefrom is executed, which is followed by sequentially transmitting a call signal from the higher-level device to the terminal devices and receiving response signals from the terminal devices. The communication terminal devices compare addresses of the response signals returned from the other terminal devices to the higher-level device against an address set for local terminal devices. If a duplicate address exists, communication from the local terminal device is locked.
    Type: Application
    Filed: December 1, 2021
    Publication date: June 9, 2022
    Inventors: Manabu KUBOTA, Tatsuyuki OOTANI, Katsumi YOSHIDA
  • Publication number: 20220032681
    Abstract: The chemical composition of the railway wheel of the present embodiment consists of: in mass %, C: 0.80 to 1.60%, Si: 1.00% or less, Mn: 0.10 to 1.25%, P: 0.050% or less, S: 0.030% or less, Al: 0.010 to 0.650%, and N: 0.0030 to 0.0200%, with the balance being Fe and impurities, and wherein, in a microstructure of the web part of the railway wheel, an area fraction of pearlite is 85.0% or more, an area fraction of pro-eutectoid cementite is 0.90 to 15.00%, and an average value of a width W of the pro-eutectoid cementite defined by Formula (1) is less than 0.70 ?m: W=½×(P/2?((P/2)2?4A)1/2)??(1) where, in Formula (1), A is an area (?m2) of the pro-eutectoid cementite, and P is a circumference length (?m) of the pro-eutectoid cementite.
    Type: Application
    Filed: September 27, 2019
    Publication date: February 3, 2022
    Inventors: Taketo MAEJIMA, Manabu KUBOTA
  • Patent number: 11237334
    Abstract: A fiber module (1B) according to the present disclosure includes an input-side optical fiber (11), an output-side optical fiber (12), a ferrule (20) in which the input-side optical fiber and the output-side optical fiber are insertable in both ends and a groove (32) is formed in a direction orthogonal to a longitudinal direction (D1) in the middle of the longitudinal direction, a dielectric multilayer film filter (30) inserted in the groove, and an input-side GI fiber (15) and an output-side GI fiber (16) joined by fusion to respective terminal portions of the input-side optical fiber and the output-side optical fiber. The dielectric multilayer film filter is interposed between an end surface (15f) of the input-side GI fiber and an end surface (16f) of the output-side GI fiber in the longitudinal direction.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: February 1, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kengo Horikoshi, Takashi Yamada, Hisao Yoshinaga, Shunsuke Kanai, Manabu Kubota
  • Publication number: 20220024247
    Abstract: The railway wheel according to the present embodiment has a chemical composition consisting of: in mass %, C: 0.80 to 1.15%, Si: 0.45% or less, Mn: 0.10 to 0.85%, P: 0.050% or less, S: 0.030% or less, Al: 0.200 to 1.500%, N: 0.0200% or less, Nb: 0.005 to 0.050%, Cr: 0 to 0.25%, and V: 0 to 0.12%, with the balance being Fe and impurities, wherein at least in the microstructure of the rim part and the web part, the amount of pro-eutectoid cementite defined by Formula (1) is 2.00 pieces/100 ?m or less: Amount of pro-eutectoid cementite (pieces/100 ?m)=a total sum of the number of pieces of pro-eutectoid cementite which intersect with two diagonal lines in a square visual field of 200 ?m×200 ?m/(5.
    Type: Application
    Filed: September 27, 2019
    Publication date: January 27, 2022
    Inventors: Taketo MAEJIMA, Manabu KUBOTA
  • Publication number: 20210285068
    Abstract: There is provided a hot rolled steel according to one aspect of the invention including, as a predetermined chemical composition: Bi: 0.0001 mass % to 0.0050 mass %, in which 90 area % or more of a metallographic structure is configured with a ferrite and a pearlite, and an average number density of Mn sulfides measured on a cross section parallel to a rolling direction having an aspect ratio of more than 10 and 30 or less which is extended along the rolling direction, is 50 pieces/mm2 to 200 pieces/mm2.
    Type: Application
    Filed: September 4, 2017
    Publication date: September 16, 2021
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Suguru YOSHIDA, Shinya TERAMOTO, Akira SHIGA, Manabu KUBOTA, Hajime HASEGAWA, Hideo MIZUKAMI
  • Patent number: 11110741
    Abstract: To provide a railway wheel which is excellent in corrosion fatigue resistance. The railway wheel according to the present embodiment has a chemical composition consisting of: in mass %, C: 0.65 to 0.80%, Si: 0.10 to 1.0%, Mn: 0.10 to 1.0%, P: not more than 0.030%, S: not more than 0.030%, Cr: 0.05 to 0.20%, Sn: 0.005 to 0.50%, Al: 0.010 to 0.050%, N: 0.0020 to 0.015%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Mo: 0 to 0.20%, V: 0 to 0.20%, Nb: 0 to 0.030%, and Ti: 0 to 0.030%, with the balance being Fe and impurities. A plate portion has a matrix structure composed of pearlite.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: September 7, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventor: Manabu Kubota
  • Patent number: 11111568
    Abstract: A steel for cold forging has a predetermined chemical composition, satisfies d+3??10.0 and SA/SB<0.30, includes 1200/mm2 or more of sulfides having an equivalent circle diameter of 1.0 to 10.0 ?m in a microstructure, and has an average distance between the sulfides of less than 30.0 ?m. Here, d is an average value of equivalent circle diameters of sulfides having an equivalent circle diameter of 1.0 ?m or more, ? is a standard deviation of the equivalent circle diameters of the sulfides having an equivalent circle diameter of 1.0 ?m or more, SA is the number of sulfides having an equivalent circle diameter of 1.0 ?m or more and less than 3.0 ?m, and SB is the number of the sulfides having an equivalent circle diameter of 1.0 ?m or more.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: September 7, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Akira Shiga, Manabu Kubota, Hajime Hasegawa
  • 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: 20210172470
    Abstract: A crankshaft with improved seizure resistance is provided. A crankshaft includes a journal and a pin, each of the journal and pin having such a surface geometry that the arithmetical mean height of the primary profile, Pa, is 0.090 ?m or smaller and the reduced peak height Rpk is 0.070 ?m or smaller. As used herein, arithmetical mean height of a primary profile Pa is defined in JIS B 0601 (2001), and reduced peak height Rpk is defined in JIS B 0671 (2002).
    Type: Application
    Filed: August 22, 2019
    Publication date: June 10, 2021
    Inventors: Tatsuhiko ABE, Manabu KUBOTA
  • Publication number: 20210115966
    Abstract: An induction-hardened crankshaft is provided that offers an excellent balance of fatigue strength, machinability and quench-cracking resistance. An induction-hardened crankshaft has a chemical composition of, in mass %: 0.30 to 0.60% C; 0.01 to 1.50% Si; 0.4 to 2.0% Mn; 0.01 to 0.50% Cr; 0.001 to 0.06% Al; 0.001 to 0.02% N; up to 0.03% P; 0.005 to 0.20% S; 0.005 to 0.060% Nb; and balance Fe and impurities, the non-induction-hardened portion having a microstructure mainly composed of ferrite-pearlite and having a fraction of ferrite F? satisfying the expression (1) provided below, the induction-hardened portion having a microstructure mainly composed of martensite or tempered martensite, and having a prior austenite grain diameter not larger than 30 ?m, F??150×[C %]+84 ??(1), where the C content in mass % in the induction-hardened crankshaft is substituted for [C %].
    Type: Application
    Filed: June 13, 2019
    Publication date: April 22, 2021
    Applicant: Nippon Steel Corporation
    Inventors: Manabu KUBOTA, Taketo MAEJIMA
  • Publication number: 20210041631
    Abstract: A fiber module (1B) according to the present disclosure includes an input-side optical fiber (11), an output-side optical fiber (12), a ferrule (20) in which the input-side optical fiber and the output-side optical fiber are insertable in both ends and a groove (32) is formed in a direction orthogonal to a longitudinal direction (D1) in the middle of the longitudinal direction, a dielectric multilayer film filter (30) inserted in the groove, and an input-side GI fiber (15) and an output-side GI fiber (16) joined by fusion to respective terminal portions of the input-side optical fiber and the output-side optical fiber. The dielectric multilayer film filter is interposed between an end surface (15f) of the input-side GI fiber and an end surface (16f) of the output-side GI fiber in the longitudinal direction.
    Type: Application
    Filed: February 28, 2019
    Publication date: February 11, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kengo HORIKOSHI, Takashi YAMADA, Hisao YOSHINAGA, Shunsuke KANAI, Manabu KUBOTA
  • Patent number: 10889870
    Abstract: In this steel component, the concentration of C in a surface layer is 0.85 mass % or more to 1.2 mass % or less, which is higher than the concentration of C in a starting material steel, the surface layer has a volume ratio of a retained-austenite structure higher than 0% and lower than 10%, the remainder of the surface layer is a martensitic structure, the area fraction of grain boundary carbides in the surface layer is lower than 2%, a layer inside the surface layer is higher than the surface layer in a volume ratio of a retained-austenite structure, and in the layer inside the surface layer, the remainder is a martensitic structure.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: January 12, 2021
    Assignees: AISIN AW CO., LTD., NIPPON STEEL CORPORATION
    Inventors: Koji Obayashi, Kazuaki Okada, Keisuke Matsuzaka, Masashi Sakakibara, Manabu Kubota, Kei Miyanishi, Tatsuya Koyama
  • Patent number: 10844466
    Abstract: There is provided a hot forging steel including, by mass %, C: more than 0.30% and less than 0.60%, Si: 0.10% to 0.90%, Mn: 0.50% to 2.00%, S: 0.010% to 0.100%, Cr: 0.01% to 1.00%, Al: more than 0.005% and 0.100% or less, N: 0.0030% to 0.0200%, Bi: more than 0.0001% and 0.0050% or less, Ti: 0% or more and less than 0.040%, V: 0% to 0.30%, Ca: 0% to 0.0040%, Pb: 0% to 0.40%, and a remainder including Fe and impurities, in which P and O in the impurities are respectively P: 0.050% or less and O: 0.0050% or less, an expression d+3?<20 is satisfied, and a presence density of MnS having an equivalent circle diameter of smaller than 2.0 ?m is 300 pieces/mm2 or more in a cross section parallel to a rolling direction of a steel.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: November 24, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Akira Shiga, Suguru Yoshida, Manabu Kubota, Hajime Hasegawa, Hideo Mizukami
  • Publication number: 20200269632
    Abstract: To provide a railway wheel which is excellent in corrosion fatigue resistance. The railway wheel according to the present embodiment has a chemical composition consisting of: in mass %, C: 0.65 to 0.80%, Si: 0.10 to 1.0%, Mn: 0.10 to 1.0%, P: not more than 0.030%, S: not more than 0.030%, Cr: 0.05 to 0.20%, Sn: 0.005 to 0.50%, Al: 0.010 to 0.050%, N: 0.0020 to 0.015%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Mo: 0 to 0.20%, V: 0 to 0.20%, Nb: 0 to 0.030%, and Ti: 0 to 0.030%, with the balance being Fe and impurities. A plate portion has a matrix structure composed of pearlite.
    Type: Application
    Filed: February 28, 2017
    Publication date: August 27, 2020
    Inventor: Manabu Kubota
  • Patent number: 10752969
    Abstract: Steel for a suspension spring including, as a chemical composition, by % by mass: C: more than 0.40% and 0.65% or less; Si: 1.00% to 3.50%; Mn: more than 2.00% and 3.00% or less; Cr: 0.01% to 2.00%; V: 0.02% to 0.50%; P: 0.020% or less; S: 0.020% or less: N: 0.0100% or less; and a remainder of Fe and impurities, in which Kf is 280 or more, in which a structure contains a tempered martensite of which an area ratio is 90% or more, in which a Fe-based carbide precipitated in the tempered martensite is a cementite, and in which an average of an area ratios of prior austenite grains which stretch in a longitudinal direction of the steel and of which an aspect ratio exceeds 3.0, is 80% or more in a case of depths of 0.1 mm, 0.2 mm, and 0.3 mm in a sheet thickness direction from a surface of the steel.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: August 25, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Manabu Kubota, Koichi Banno, Keisuke Chiba, Ryuuichi Seki
  • Patent number: 10724125
    Abstract: Spring steel includes: as a chemical composition, by mass %, C: 0.40% to 0.60%, Si: 0.90% to 2.50%, Mn: 0.20% to 1.20%, Cr: 0.15% to 2.00%, Ni: 0.10% to 1.00%, Ti: 0.030% to 0.100%, B: 0.0010% to 0.0060%, N: 0.0010% to 0.0070%, Cu: 0% to 0.50%, Mo: 0% to 1.00%, V: 0% to 0.50%, Nb: 0% to 0.10%, P: limited to less than 0.020%, S: limited to less than 0.020%, Al: limited to less than 0.050%, and a remainder including Fe and impurities, in a case where [Ti] represents a Ti content and [N] represents a N content by mass %, the chemical composition satisfies ([Ti]?3.43×[N])>0.03, and a total number density of a Ti carbide and a Ti carbonitride having a diameter of 5 nm to 100 nm is more than 50 piece/?m3.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: July 28, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Takahisa Suzuki, Manabu Kubota, Shuji Kozawa, Hirotsugu Miyamoto
  • Publication number: 20200102623
    Abstract: A railway wheel in which formation of pro-eutectoid cementite is suppressed is stably produced. After heating an intermediate product containing, in mass %, C: 0.80 to 1.15% to a temperature not less than Acm transformation point, the intermediate product is cooled such that the cooling rate (° C./sec) in a range from 800 to 500° C. satisfies the following conditions: Surface other than the tread and the flange surface: not more than Fn1 defined by Formula (1), Cooling rate in a region in which cooling rate is slowest: not less than Fn2 defined by Formula (1), and Tread and flange surface: not less than Fn2: Fn1=?5.0+exp(5.651?1.427×C?1.280×Si?0.7723×Mn?1.815×Cr?1.519×Al?7.798×V)??(1) Fn2=0.515+exp(?24.816+24.121×C+1.210×Si+0.529×Mn+2.458×Cr?15.116×Al?5.
    Type: Application
    Filed: March 30, 2018
    Publication date: April 2, 2020
    Inventors: Taketo MAEJIMA, Manabu KUBOTA
  • Patent number: 10597765
    Abstract: A steel according to an aspect of the present invention has a chemical composition within a predetermined range, in which a hardenability index Ceq ranges from greater than 7.5 to smaller than 44.0, a metallographic structure includes ferrite ranging from 85 to 100 area %, an average distance between sulfides, which are observed in a cross section parallel to a rolling direction of the steel and have an equivalent circle diameter ranging from 1 ?m or greater to smaller than 2 ?m, is shorter than 30.0 ?m, and a presence density of the sulfides, which are observed in the cross section parallel to the rolling direction of the steel and have an equivalent circle diameter ranging from 1 ?m or greater to smaller than 2 ?m, is 300 pieces/mm2 or more.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: March 24, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Akira Shiga, Manabu Kubota, Hajime Hasegawa, Hideo Mizukami