Patents by Inventor Hirofumi Ito
Hirofumi Ito 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: 11965556Abstract: A method for measuring indentation resistance includes: obtaining a first curve indicating a yield shear stress in a depth direction of a raceway surface of a material forming a rolling bearing in a state before the raceway surface is subjected to machining, a second curve indicating a static shear stress in the depth direction of the raceway surface in a state in which the raceway surface is subjected to the machining, and a third curve indicating a static shear stress in the depth direction of the raceway surface in a state in which rolling elements are in contact with the raceway surface and a static load is applied to the raceway surface; and obtaining a correlation between an area and an indentation depth of the raceway ring by defining a region surrounded by exceeding the first curve and the second curve and falling below the third curve as the area.Type: GrantFiled: April 7, 2021Date of Patent: April 23, 2024Assignee: NSK LTD.Inventors: Hirofumi Ito, Takahito Shimada, Masahide Natori, Hideyuki Hidaka, Hayato Ishigami, Hiroki Komata
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Patent number: 11788579Abstract: In a raceway surface of at least one of an inner ring and an outer ring, a region not affected by machining is set as a first region, and a region, which has (a) a machining amount of 0.03 or more, (b) an amount of residual austenite being 70% or more of an amount of retained austenite in the first region, and (c) a compressive residual stress being higher by 500 MPa or more than a compressive residual stress in the first region, is set as a second region.Type: GrantFiled: January 27, 2021Date of Patent: October 17, 2023Assignee: NSK LTD.Inventors: Hirofumi Ito, Masahide Natori, Hideyuki Hidaka
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Publication number: 20230175553Abstract: In a raceway surface of at least one of an inner ring and an outer ring, a region not affected by machining is set as a first region, and a region, which has (a) a machining amount of 0.03 or more, (b) an amount of residual austenite being 70% or more of an amount of retained austenite in the first region, and (c) a compressive residual stress being higher by 500 MPa or more than a compressive residual stress in the first region, is set as a second region.Type: ApplicationFiled: January 27, 2021Publication date: June 8, 2023Applicant: NSK LTD.Inventors: Hirofumi ITO, Masahide NATORI, Hideyuki HIDAKA
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Publication number: 20220268316Abstract: A method for measuring indentation resistance includes: obtaining a first curve indicating a yield shear stress in a depth direction of a raceway surface of a material forming a rolling bearing in a state before the raceway surface is subjected to machining, a second curve indicating a static shear stress in the depth direction of the raceway surface in a state in which the raceway surface is subjected to the machining, and a third curve indicating a static shear stress in the depth direction of the raceway surface in a state in which rolling elements are in contact with the raceway surface and a static load is applied to the raceway surface; and obtaining a correlation between an area and an indentation depth of the raceway ring by defining a region surrounded by exceeding the first curve and the second curve and falling below the third curve as the area.Type: ApplicationFiled: April 7, 2021Publication date: August 25, 2022Applicant: NSK Ltd.Inventors: Hirofumi ITO, Takahito SHIMADA, Masahide NATORI, Hideyuki HIDAKA, Hayato ISHIGAMI, Hiroki KOMATA
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Patent number: 11094661Abstract: A highly reliable bonded structure having excellent thermal fatigue resistance characteristics and thermal stress relaxation characteristics is provided. The bonded structure of the present invention comprises a first member, a second member capable of being bonded to the first member, and a bonding part interposed between a first bond surface at the first member side and a second bond surface at the second member side to bond the first member and the second member. The bonding part has at least a bonding layer, a reinforcing layer, and an intermediate layer. The bonding layer is composed of an intermetallic compound and bonded to the first bond surface.Type: GrantFiled: November 15, 2016Date of Patent: August 17, 2021Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hirofumi Ito, Masanori Usui, Makoto Kuwahara
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Publication number: 20210197145Abstract: A nozzle for spouting a liquid phase, in which one liquid phase in a two-liquid phase system can be stably jetted as highly dispersible droplets while suppressing coalescence of droplets, and accumulation of fine solid components in the nozzle hardly occurs. The nozzle has a structure in which capillary tubes or pores are assembled. Further, the capillary tubes or the pores are formed using a suitable material having a low affinity for organic or a low affinity for water, or a material subjected to appropriate surface treatment.Type: ApplicationFiled: March 31, 2020Publication date: July 1, 2021Inventors: Hirochika NAGANAWA, Tetsushi NAGANO, Hirofumi ITO, Ryosuke SATO
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Patent number: 10633729Abstract: Provided is austenitic heat-resisting cast steel that is excellent in both of the heat resistance and the machinability. Austenitic heat-resisting cast steel, includes: C: 0.1 to 0.4 mass %; Si: 0.8 to 2.5 mass %; Mn: 0.8 to 2.0 mass %; S: 0.05 to 0.30 mass %; Ni: 5 to 20 mass %; N: 0.3 mass % or less; Zr: 0.01 to 0.20 mass %; Ce: 0.01 to 0.10 mass %; one type or more of the elements selected from the following groups of (i) to (iii), at least including (i), (i) Cr: 14 to 24 mass %, (ii) Nb: 1.5 mass % or less, and (iii) Mo: 3.0 mass % or less; and Fe and inevitable impurity as a remainder.Type: GrantFiled: June 2, 2016Date of Patent: April 28, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Takamichi Ueda, Harumi Ueno, Takumi Hijii, Hitomi Hirai, Takashi Maeshima, Kazuaki Nishino, Hirofumi Ito
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Publication number: 20180240769Abstract: A highly reliable bonded structure having excellent thermal fatigue resistance characteristics and thermal stress relaxation characteristics is provided. The bonded structure of the present invention comprises a first member, a second member capable of being bonded to the first member, and a bonding part interposed between a first bond surface at the first member side and a second bond surface at the second member side to bond the first member and the second member. The bonding part has at least a bonding layer, a reinforcing layer, and an intermediate layer. The bonding layer is composed of an intermetallic compound and bonded to the first bond surface.Type: ApplicationFiled: November 15, 2016Publication date: August 23, 2018Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hirofumi ITO, Masanori USUI, Makoto KUWAHARA
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Publication number: 20180155809Abstract: Provided is austenitic: heat-resisting cast steel that is excellent in both of the heat resistance and the machinability. Austenitic heat-resisting cast steel, includes: C: 0.1 to 0.4 mass %; Si: 0.8 to 2.5 mass %, Mn: 0.8 to 2.0 mass %: S: 0.05 to 0.30 mass %, Ni: 5 to 20 mass %; N: 0.3 mass % or less; Zr: 0.01 to 0.20 mass %; Ce: 0.01 to 0.10 mass %; one type or more of the elements selected from the following groups of (i) to (iii), at least including (i), (i) Cr: 14 to 24 mass %, (ii) Nb: 1.5 mass % or less, and Mo: 3.0 mass % or less; and Fe and inevitable impurity as a remainder.Type: ApplicationFiled: June 2, 2016Publication date: June 7, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Takamichi UEDA, Harumi UENO, Takumi HIJII, Hitomi HIRAI, Takashi MAESHIMA, Kazuaki NISHINO, Hirofumi ITO
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Patent number: 9821406Abstract: A jointed body that has been solid-phase jointed at normal temperature and that has a non-conventional structure is presented. The jointed body is formed by solid-phase joining a first jointed member to a second jointed member, and has a junction interface between the first member and the second member. This jointed body includes an average crystal grain size in a near interface structure that constitutes a near interface area having a total width of 20 micrometers and extending at both sides of the junction interface as a center is 75-100% of an average crystal grain size in an around interface structure that constitutes around interface areas located at both outer sides of the near interface area. In the jointed body, the near interface structure after the joining is almost the same as the structure before the joining, allowing the jointed body to exert similar characteristics to the jointed members.Type: GrantFiled: March 1, 2013Date of Patent: November 21, 2017Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Tadashi Oshima, Hisaaki Takao, Hirofumi Ito
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Patent number: 9745650Abstract: Provided is austenite heat-resisting cast steel with reduced precipitation of ferrite phase during the application of thermal load to stabilize the austenite structure for improved heat resistance. The austenite heat-resisting cast steel contains elements of 0.1 to 0.6 mass % of C, 1.0 to 2.5 mass % of Si, 1.0 to 3.5 mass % of Mn, 0.05 to 0.2 mass % of S, 14 to 24 mass % of Cr, 5 to 20 mass % of Ni, 0.1 to 0.3 mass % of N, 0.01 to 1.2 mass % of Zr, 0.01 to 1.5 mass % of Cu, 0.01 to 1.5 mass % of Nb, Fe as a remainder and unavoidable impurity. The elements satisfy the following expressions: Mn—S?1.0; and C?(1/12Cr?32Zr)>0, where symbols for elements in these expressions represent values indicating content of the elements corresponding to the symbols in a unit of atomic %.Type: GrantFiled: January 22, 2015Date of Patent: August 29, 2017Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Takamichi Ueda, Harumi Ueno, Takashi Maeshima, Hirofumi Ito, Kazuaki Nishino, Hideaki Ikehata
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Patent number: 9668658Abstract: A first calculation unit receives phase characteristics Pa(f) and Pb(f) outputted from frequency transform units, calculates a propagation time difference based on a phase difference between the two phase characteristics in a high-frequency component thereof, and calculates a pulse wave velocity by dividing a difference in the distances of vascular pathways from the heart to respective measurement areas. Meanwhile, a second calculation unit calculates a pulse wave velocity by dividing the stated difference in the distances by a appearance time difference at a predetermined position in respective pulse waveforms obtained by rendering the measurement signals Pa(t) and Pb(t) on a time axis. A comparison unit compares the pulse wave velocities, and in the case where the ratio thereof is outside a predetermined range, an evaluation result indicating that it is possible that a predetermined pathologic change is present in the vascular pathway is outputted to a display processing unit.Type: GrantFiled: December 18, 2012Date of Patent: June 6, 2017Assignee: OMRON HEALTHCARE CO., LTD.Inventors: Hironori Sato, Naoki Mori, Tomoko Hashimoto, Toshihiko Ogura, Shozo Takamatsu, Hideo Utsuno, Kimihiko Kichikawa, Hirofumi Ito
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Patent number: 9349704Abstract: A jointed structure comprises a first metal layer and a second metal layer. The first metal layer and the second metal layer are jointed together and have different coefficients of thermal expansion. The first metal layer and the second metal layer are jointed together by solid-phase joining via a jointing interface microstructure, wherein the jointing interface microstructure includes an amorphous oxide phase and having a thickness of 50 nm or less.Type: GrantFiled: February 10, 2015Date of Patent: May 24, 2016Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Tadashi Oshima, Hirofumi Ito, Hisaaki Takao
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Publication number: 20150270238Abstract: The jointed structure of the present invention is configured such that a first metal layer and a second metal layer are jointed together. More specifically, the jointed structure of the present invention includes: the first metal layer which receives heat from a heat generating body; and the second metal layer which is jointed to the first metal layer and receives heat from the first metal layer, for example. The first metal layer and the second metal layer according to the present invention are jointed together by solid-phase joining via a joining interface microstructure that has a thickness of 50 nm or less. Since the first metal surface and the second metal surface are jointed together without via a brazing material, adhesive or other material, the jointed structure of the present invention exhibits high conductivity and heat resistance property. Such a jointed structure is suitable for power modules.Type: ApplicationFiled: February 10, 2015Publication date: September 24, 2015Inventors: Tadashi OSHIMA, Hirofumi ITO, Hisaaki TAKAO
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Publication number: 20150225823Abstract: Provided is austenite heat-resisting cast steel with reduced precipitation of ferrite phase during the application of thermal load to stabilize the austenite structure for improved heat resistance. The austenite heat-resisting cast steel contains elements of 0.1 to 0.6 mass % of C, 1.0 to 2.5 mass % of Si, 1.0 to 3.5 mass % of Mn, 0.05 to 0.2 mass % of S, 14 to 24 mass % of Cr, 5 to 20 mass % of Ni, 0.1 to 0.3 mass % of N, 0.01 to 1.2 mass % of Zr, 0.01 to 1.5 mass % of Cu, 0.01 to 1.5 mass % of Nb, Fe as a remainder and unavoidable impurity. The elements satisfy the following expressions: Mn—S?1.0; and C?(1/12Cr?32Zr)>0, where symbols for elements in these expressions represent values indicating content of the elements corresponding to the symbols in a unit of atomic %.Type: ApplicationFiled: January 22, 2015Publication date: August 13, 2015Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takamichi UEDA, Harumi UENO, Takashi MAESHIMA, Hirofumi ITO, Kazuaki NISHINO, Hideaki IKEHATA
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Publication number: 20150044496Abstract: A jointed body that has been solid-phase jointed at normal temperature and that has a non-conventional structure is presented. The jointed body is formed by solid-phase joining a first jointed member to a second jointed member, and has a junction interface between the first member and the second member. This jointed body includes an average crystal grain size in a near interface structure that constitutes a near interface area having a total width of 20 micrometers and extending at both sides of the junction interface as a center is 75-100% of an average crystal grain size in an around interface structure that constitutes around interface areas located at both outer sides of the near interface area. In the jointed body, the near interface structure after the joining is almost the same as the structure before the joining, allowing the jointed body to exert similar characteristics to the jointed members.Type: ApplicationFiled: March 1, 2013Publication date: February 12, 2015Inventors: Tadashi Oshima, Hisaaki Takao, Hirofumi Ito
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Patent number: 8673803Abstract: An alkaline-earth metal compound-containing zeolite catalyst composed of a composite material comprising at least a first component, a second component, and a third component. The first component is composed of at least one of zeolites selected from a group consisting of proton-type zeolites and ammonium type zeolites. The second component is composed of at least one of alkaline-earth metal compounds. The third component is composed of at least one selected from a group consisting of aluminum oxides, aluminum hydroxides, silicon oxides, silicon hydroxides, and clay minerals. The first component has a molar ratio of Si/Al of 10 or more and 300 or less. Content of the second component relative to the first component is 0.3 mass % or more and less than 10 mass % as alkaline-earth metal. Content of the third component relative to the first component is 15 mass % or more and 200 mass % or less.Type: GrantFiled: October 18, 2012Date of Patent: March 18, 2014Assignee: JGC CorporationInventors: Chizu Inaki, Hirofumi Ito, Kazunori Honda, Koji Oyama, Atsushi Okita
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Patent number: 8530714Abstract: Disclosed is a method for production of lower olefins from a raw material containing dimethyl ether (DME), which can produce lower olefins (e.g. propylene) with good yield and in an economically advantageous manner by prolonging the time until the reversible deactivation of a zeolite catalyst and preventing the irreversible deactivation of the catalyst, can reduce the amount of water to be recycled to increase the thermal efficiency of the process, and can simplify the facilities and operations. Also disclosed is a method for improving the yield of propylene with good efficiency under practical operating conditions. A feed gas which comprises a DME-containing feedstock gas and an additive gas and further contains steam at a specific proportion is introduced into an olefin synthesis reactor to contact the feed gas with a zeolite catalyst, thereby producing a hydrocarbon product containing C2-C5 olefins.Type: GrantFiled: November 13, 2006Date of Patent: September 10, 2013Assignee: JGC CorporationInventors: Hirofumi Ito, Kazunori Honda, Koji Oyama, Nobuyasu Chikamatsu, Kazutaka Hiraoka, Atsushi Okita
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Patent number: 8462163Abstract: [PROBLEMS] To naturally and smoothly move a control target such as a virtual actor by using a small data amount and effectively perform data setting for it. [MEANS FOR SOLVING PROBLEMS] A computer system includes means for storing node data on a key frame and edge data such as a transition direction between nodes and a frame rate and execution means for shifting to another node by a morphing process determined by the edge data when shifting from one node to another node. Moreover, when inputting data, node icons are connected by an edge icon so as to enable effective data input. In data registration of the morphing process, feature line data is manually inputted for one image of an image pair and then a feature point in the vicinity of the both ends of the feature line is searched so as to automatically compensate the feature line data.Type: GrantFiled: August 27, 2007Date of Patent: June 11, 2013Assignee: CYBER CLONE Co., Ltd.Inventor: Hirofumi Ito
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Patent number: 8450550Abstract: A process for producing propylene, which including feeding at least one of dimethyl ether and methanol to a reactor to be reacted in the presence of a catalyst; supplying an obtained reaction product to a separator by which low-boiling compounds having a boiling point of ?50° C. or lower at atmospheric pressure among the reaction product are separated; and recycling a proportion of at least 70% of a total amount of the separated low-boiling compounds to said reactor.Type: GrantFiled: September 19, 2007Date of Patent: May 28, 2013Assignee: JGC CorporationInventors: Hirofumi Ito, Jiro Yoshida, Shuichi Funatsu, Koji Ooyama, Nobuyasu Chikamatsu