Patents by Inventor Yasuyuki Fukushima
Yasuyuki Fukushima 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: 11718569Abstract: A production method for a composite material, which includes a porous substrate and a silicon carbide film formed on a surface of a material forming the porous substrate, includes causing a silicon source containing a silicon atom, a chlorine source containing a chlorine atom, and a carbon source containing a carbon atom to react with each other to form the silicon carbide film on the surface of the material forming the porous substrate.Type: GrantFiled: November 30, 2020Date of Patent: August 8, 2023Assignee: IHI CorporationInventors: Yuuta Ootsuka, Yasutomo Tanaka, Hisato Inoue, Wataru Kubota, Masato Ishizaki, Yasuyuki Fukushima, Izumi Matsukura
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Publication number: 20230027711Abstract: A bearing device includes: at least one bearing that has a rolling element and a raceway surface to support a main shaft; a member disposed on a path through which pressing force generating a preload between the rolling element and the raceway surface is transmitted; and at least one load sensor element fixed to the member to measure the pressing force. At least one load sensor element is a chip component including a thin film pattern of which resistance changes according to the pressing force and a protective layer that insulates and protects thin film pattern.Type: ApplicationFiled: December 8, 2020Publication date: January 26, 2023Inventors: Takashi Koike, Yasuyuki FUKUSHIMA, Yusuke SHIBUYA, Daichi KONDOU
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Patent number: 11293494Abstract: A bearing equipped with a sensor and incorporating a power generation function in a simple configuration is provided. A bearing includes an outer ring, a plurality of rolling elements, an inner ring, a cage, a seal member, a sensor, a transmission unit, and a power generation unit. The sensor is disposed in the seal member, and detects state information of the bearing. The transmission unit transmits the state information detected by the sensor to outside. The power generation unit is disposed so as to face a bearing space sandwiched between the outer ring and the inner ring, and generates electric power that is to be supplied to the sensor and the transmission unit. The power generation unit includes an element that converts stress into electromotive force.Type: GrantFiled: February 8, 2019Date of Patent: April 5, 2022Assignee: NTN CORPORATIONInventors: Takashi Koike, Yasuyuki Fukushima, Yusuke Shibuya
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Patent number: 11229893Abstract: Provided is a method of producing a silicon compound material, including the steps of: storing a silicon carbide preform in a reaction furnace; supplying a raw material gas containing methyltrichlorosilane to the reaction furnace to infiltrate the preform with silicon carbide; and controlling and reducing a temperature of a gas discharged from the reaction furnace at a predetermined rate to subject the gas to continuous thermal history, to thereby decrease generation of a liquid or solid by-product derived from the gas.Type: GrantFiled: January 4, 2019Date of Patent: January 25, 2022Assignees: IHI Corporation, The University of TokyoInventors: Yasuyuki Fukushima, Kozue Akazaki, Yasutomo Tanaka, Kazuma Akikubo, Takeshi Nakamura, Yukihiro Shimogaki, Takeshi Momose, Noboru Sato, Kohei Shima, Yuichi Funato
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Patent number: 11181399Abstract: The magnetic encoder includes: a core member of annular shape having a press-fitting portion which bends and extends from an edge of a track formation surface, and to which a rotary shaft is press-fitted and fixed; and two or more rows of magnetic tracks arranged adjacent to each other on a magnetic member provided on the track formation surface, each track having N poles and S poles alternately magnetized thereon. The two or more rows of magnetic tracks include a main track that has a largest number of magnetic poles and is used for calculating an angle of rotation, and a sub track used for calculating a phase difference from the main track. The main track is located on a side more distant from the press-fitting portion than the sub track.Type: GrantFiled: July 24, 2019Date of Patent: November 23, 2021Assignee: NTN CORPORATIONInventors: Takashi Koike, Yasuyuki Fukushima, Yuya Yamaguchi
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Patent number: 11137303Abstract: A torque detection device includes an inner ring, a middle ring, an outer ring, a first beam, a second beam, a magnetic target, and a magnetic sensor. The first beam is composed of an elastic member extending in a radial direction so as to couple the inner ring and the middle ring together. The second beam is composed of an elastic member extending in a radial direction so as to couple the middle ring to the outer ring together. The magnetic target is fixed to the inner ring and the magnetic sensor is fixed to the middle ring such that the magnetic target and the magnetic sensor face each other. Torque acting on the inner ring or the outer ring is calculated according to how an amount of magnetism sensed by the magnetic sensor changes.Type: GrantFiled: September 20, 2018Date of Patent: October 5, 2021Assignee: NTN CORPORATIONInventors: Yusuke Shibuya, Takashi Koike, Yasuyuki Fukushima
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Patent number: 11099037Abstract: A magnetic encoder having a plurality of rows of magnetic tracks and capable of detecting an absolute angle is easily producible with higher accuracy. The magnetic encoder includes: a core member of annular shape having a bending plate portion that bends and extends from an edge of a track formation surface; and two or more rows of magnetic tracks arranged adjacent to each other on a magnetic member provided on the track formation surface, each track having N poles and S poles alternately magnetized thereon. The magnetic tracks include a main track that has a largest number of magnetic poles and is used for calculating an angle, and a sub track used for calculating a phase difference from the main track. The main track is located on a side closer to the bending plate portion than the sub track.Type: GrantFiled: July 24, 2019Date of Patent: August 24, 2021Assignee: NTN CORPORATIONInventors: Takashi Koike, Yasuyuki Fukushima, Yuya Yamaguchi
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Publication number: 20210078910Abstract: A production method for a composite material, which includes a porous substrate and a silicon carbide film formed on a surface of a material forming the porous substrate, includes causing a silicon source containing a silicon atom, a chlorine source containing a chlorine atom, and a carbon source containing a carbon atom to react with each other to form the silicon carbide film on the surface of the material forming the porous substrate.Type: ApplicationFiled: November 30, 2020Publication date: March 18, 2021Applicant: IHI CorporationInventors: Yuuta OOTSUKA, Yasutomo TANAKA, Hisato INOUE, Wataru KUBOTA, Masato ISHIZAKI, Yasuyuki FUKUSHIMA, Izumi MATSUKURA
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Publication number: 20200392987Abstract: A bearing equipped with a sensor and incorporating a power generation function in a simple configuration is provided. A bearing includes an outer ring, a plurality of rolling elements, an inner ring, a cage, a seal member, a sensor, a transmission unit, and a power generation unit. The sensor is disposed in the seal member, and detects state information of the bearing. The transmission unit transmits the state information detected by the sensor to outside. The power generation unit is disposed so as to face a bearing space sandwiched between the outer ring and the inner ring, and generates electric power that is to be supplied to the sensor and the transmission unit. The power generation unit includes an element that converts stress into electromotive force.Type: ApplicationFiled: February 8, 2019Publication date: December 17, 2020Inventors: Takashi KOIKE, Yasuyuki FUKUSHIMA, Yusuke SHIBUYA
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Publication number: 20200292400Abstract: A torque detection device includes an inner ring, a middle ring, an outer ring, a first beam, a second beam, a magnetic target, and a magnetic sensor. The first beam is composed of an elastic member extending in a radial direction so as to couple the inner ring and the middle ring together. The second beam is composed of an elastic member extending in a radial direction so as to couple the middle ring to the outer ring together. The magnetic target is fixed to the inner ring and the magnetic sensor is fixed to the middle ring such that the magnetic target and the magnetic sensor face each other. Torque acting on the inner ring or the outer ring is calculated according to how an amount of magnetism sensed by the magnetic sensor changes.Type: ApplicationFiled: September 20, 2018Publication date: September 17, 2020Inventors: Yusuke SHIBUYA, Takashi KOIKE, Yasuyuki FUKUSHIMA
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Publication number: 20190346289Abstract: The magnetic encoder includes: a core member of annular shape having a press-fitting portion which bends and extends from an edge of a track formation surface, and to which a rotary shaft is press-fitted and fixed; and two or more rows of magnetic tracks arranged adjacent to each other on a magnetic member provided on the track formation surface, each track having N poles and S poles alternately magnetized thereon. The two or more rows of magnetic tracks include a main track that has a largest number of magnetic poles and is used for calculating an angle of rotation, and a sub track used for calculating a phase difference from the main track. The main track is located on a side more distant from the press-fitting portion than the sub track.Type: ApplicationFiled: July 24, 2019Publication date: November 14, 2019Applicant: NTN CORPORATIONInventors: Takashi KOIKE, Yasuyuki FUKUSHIMA, Yuya YAMAGUCHI
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Publication number: 20190346291Abstract: A magnetic encoder having a plurality of rows of magnetic tracks and capable of detecting an absolute angle is easily producible with higher accuracy. The magnetic encoder includes: a core member of annular shape having a bending plate portion that bends and extends from an edge of a track formation surface; and two or more rows of magnetic tracks arranged adjacent to each other on a magnetic member provided on the track formation surface, each track having N poles and S poles alternately magnetized thereon. The magnetic tracks include a main track that has a largest number of magnetic poles and is used for calculating an angle, and a sub track used for calculating a phase difference from the main track. The main track is located on a side closer to the bending plate portion than the sub track.Type: ApplicationFiled: July 24, 2019Publication date: November 14, 2019Applicant: NTN CORPORATIONInventors: Takashi KOIKE, Yasuyuki FUKUSHIMA, Yuya YAMAGUCHI
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Publication number: 20190346292Abstract: Provided is a magnetic encoder that can be produced by a simple modification of an existing production method and that can detect an absolute angle with high efficiency, and a method and an apparatus for producing the magnetic encoder. In a magnetic encoder, a plurality of rows of magnetic tracks, each having N poles and S poles arranged alternately, are disposed adjacent to each other. The rows of magnetic tracks include a main track used for calculating an angle and a sub track used for calculating a phase difference from the main track. The number of magnetic poles of the main track is larger than that of the sub track. The main track is magnetized after the sub track. Thus, accuracy of pitch of the magnetic poles is higher in the main track than in the sub track.Type: ApplicationFiled: July 24, 2019Publication date: November 14, 2019Applicant: NTN CORPORATIONInventors: Takashi KOIKE, Yasuyuki FUKUSHIMA, Yuya YAMAGUCHI
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Publication number: 20190135640Abstract: Provided is a method of producing a silicon compound material, including the steps of: storing a silicon carbide preform in a reaction furnace; supplying a raw material gas containing methyltrichlorosilane to the reaction furnace to infiltrate the preform with silicon carbide; and controlling and reducing a temperature of a gas discharged from the reaction furnace at a predetermined rate to subject the gas to continuous thermal history, to thereby decrease generation of a liquid or solid by-product derived from the gas.Type: ApplicationFiled: January 4, 2019Publication date: May 9, 2019Applicants: IHI Corporation, The University of TokyoInventors: Yasuyuki FUKUSHIMA, Kozue AKAZAKI, Yasutomo TANAKA, Kazuma AKIKUBO, Takeshi NAKAMURA, Yukihiro SHIMOGAKI, Takeshi MOMOSE, Noboru SATO, Kohei SHIMA, Yuichi FUNATO
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Patent number: 10221104Abstract: A mixed gas containing a precursor gas, an additive gas and a carrier gas is supplied to a preform stored in an electric furnace, and silicon carbide is deposited by chemical vapor deposition or chemical vapor phase impregnation to form a film. The preform includes multiple fiber bundles, and the fiber bundles include multiple fibers. This heat-resistant composite material includes a ceramic fiber preform impregnated with silicon carbide, and producing the composite material involves a step in which silicon carbide is deposited between the fibers to integrate the fibers which configure the fiber bundles, and a step in which silicon carbide is deposited between the fiber bundles to integrate the fiber bundles. Hereby, uniformity of embedding and growth rate of the silicon carbide film are both attained.Type: GrantFiled: May 26, 2016Date of Patent: March 5, 2019Assignees: IHI CORPORATION, THE UNIVERSITY OF TOKYOInventors: Takeshi Nakamura, Masato Ishizaki, Kozue Hotozuka, Yasuyuki Fukushima, Yukihiro Shimogaki, Takeshi Momose, Hidetoshi Sugiura, Kohei Shima, Yuichi Funato
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Patent number: 10167549Abstract: In the present embodiment, in the production of a heat-resistant composite material resulting from impregnating a ceramic fiber preform with silicon carbide, a mixed gas containing starting material gas, an additive gas, and a carrier gas is supplied to a substrate having a minute structure such as a preform stored in an electric furnace, silicon carbide is deposited to form a film by means of a chemical vapor deposition method or a chemical vapor infiltration method, and the film formation growth speed and embedding uniformity are controlled by means of the amount of additive gas added to the starting material gas, the starting material gas contains tetramethylsilane, and the additive gas contains a molecule containing chlorine such as methyl chloride or hydrogen chloride. The film formation growth speed and embedding uniformity of the silicon carbide are both achieved.Type: GrantFiled: June 28, 2016Date of Patent: January 1, 2019Assignees: IHI CORPORATION, THE UNIVERSITY OF TOKYOInventors: Takeshi Nakamura, Kozue Hotozuka, Yasuyuki Fukushima, Yukihiro Shimogaki, Takeshi Momose, Hidetoshi Sugiura, Kohei Shima, Yuichi Funato
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Patent number: 9822445Abstract: By using chemical vapor deposition or chemical vapor infiltration, silicon carbide is deposited on a preform 100 accommodated in a reaction furnace 11 for film formation, and the amount of additive gas added to raw material gas and carrier gas to be supplied to the reactive furnace 11 is used to control the growth rate and filling uniformity at film formation of silicon carbide. When the film formation of silicon carbide follows a first-order reaction, the amount of added additive gas is used to control the sticking probability of the film-forming species. When the film formation of silicon carbide follows a Langmuir-Hinshelwood rate formula, the amount of added additive gas is used to make a control so that a zero-order reaction region of the Langmuir-Hinshelwood rate formula is used.Type: GrantFiled: February 12, 2015Date of Patent: November 21, 2017Assignees: IHI Corporation, The University of TokyoInventors: Takeshi Nakamura, Masato Ishizaki, Kenji Fuchigami, Kozue Hotozuka, Yukihiro Shimogaki, Takeshi Momose, Yasuyuki Fukushima, Noboru Sato, Yuichi Funato, Hidetoshi Sugiura
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Publication number: 20160305015Abstract: In the present embodiment, in the production of a heat-resistant composite material resulting from impregnating a ceramic fiber preform with silicon carbide, a mixed gas containing starting material gas, an additive gas, and a carrier gas is supplied to a substrate having a minute structure such as a preform stored in an electric furnace, silicon carbide is deposited to form a film by means of a chemical vapor deposition method or a chemical vapor infiltration method, and the film formation growth speed and embedding uniformity are controlled by means of the amount of additive gas added to the starting material gas, the starting material gas contains tetramethylsilane, and the additive gas contains a molecule containing chlorine such as methyl chloride or hydrogen chloride. The film formation growth speed and embedding uniformity of the silicon carbide are both achieved.Type: ApplicationFiled: June 28, 2016Publication date: October 20, 2016Applicants: IHI Corporation, The University of TokyoInventors: Takeshi NAKAMURA, Kozue HOTOZUKA, Yasuyuki FUKUSHIMA, Yukihiro SHIMOGAKI, Takeshi MOMOSE, Hidetoshi SUGIURA, Kohei SHIMA, Yuichi FUNATO
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Publication number: 20160297716Abstract: A mixed gas containing a precursor gas, an additive gas and a carrier gas is supplied to a preform stored in an electric furnace, and silicon carbide is deposited by chemical vapor deposition or chemical vapor phase impregnation to form a film. The preform includes multiple fiber bundles, and the fiber bundles include multiple fibers. This heat-resistant composite material includes a ceramic fiber preform impregnated with silicon carbide, and producing the composite material involves a step in which silicon carbide is deposited between the fibers to integrate the fibers which configure the fiber bundles, and a step in which silicon carbide is deposited between the fiber bundles to integrate the fiber bundles. Hereby, uniformity of embedding and growth rate of the silicon carbide film are both attained.Type: ApplicationFiled: May 26, 2016Publication date: October 13, 2016Applicants: IHI Corporation, The University of TokyoInventors: Takeshi NAKAMURA, Masato ISHIZAKI, Kozue HOTOZUKA, Yasuyuki FUKUSHIMA, Yukihiro SHIMOGAKI, Takeshi MOMOSE, Hidetoshi SUGIURA, Kohei SHIMA, Yuichi FUNATO
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Patent number: 9377880Abstract: A position indicator includes: a core body disposed within a casing such that a tip thereof projects from one opening of the casing; a printed board on which a circuit element for detecting pressing force applied to the tip is disposed; and a pen pressure detecting module formed by arranging, in an axial direction, plural parts for detecting a displacement corresponding to the pressing force. The plural parts are arranged within a hollow portion of a cylindrical holder portion housed within the casing. The holder portion has an opening portion in a side circumferential surface thereof. The opening portion is opened in a direction perpendicular to the axial direction. At least one of the parts is/are housed into the hollow portion through the opening portion. The holder portion includes a locking portion configured to prevent the at least one of the parts from falling out through the opening portion.Type: GrantFiled: February 26, 2014Date of Patent: June 28, 2016Assignee: Wacom Co., Ltd.Inventors: Yasuyuki Fukushima, Hiroyuki Fujitsuka