Patents by Inventor Hiroyoshi Ito
Hiroyoshi 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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Publication number: 20240086534Abstract: A tampering detection device includes tampering detection circuitry configured to acquire an access pattern of a monitoring target file, extract a time-series pattern of access for each monitoring target file from the access pattern acquired, and determine a scan pattern on a basis of the time-series pattern of access extracted.Type: ApplicationFiled: January 13, 2021Publication date: March 14, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yuki YAMANAKA, Manami ITO, Ryota SATO, Hiroyoshi TAKIGUCHI, Nobuhiro CHIBA, Yoshiaki NAKAJIMA
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Patent number: 11300159Abstract: An abnormality detection device for a rolling bearing includes a filter that allows passage of lubricating oil, while preventing passage of metal pieces, from the bearing space between the outer ring and the inner ring of the rolling bearing to the exterior of the bearing space. The device further includes an electrical circuit including a pair of permanent magnets mounted, as a pair of electrodes, to the filter so as to be spaced apart from each other, and electrical lines extending from the respective electrodes to a power source. A state detector detects a change in electrical output from the electrical circuit when metal pieces adhere between the pair of permanent magnets, thereby detecting the state of the metal pieces contained in the lubricating oil.Type: GrantFiled: December 11, 2017Date of Patent: April 12, 2022Assignee: NTN CorporationInventor: Hiroyoshi Ito
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Publication number: 20210277955Abstract: An abnormality detection device for a rolling bearing includes a filter that allows passage of lubricating oil, while preventing passage of metal pieces, from the bearing space between the outer ring and the inner ring of the rolling bearing to the exterior of the bearing space. The device further includes an electrical circuit including a pair of permanent magnets mounted, as a pair of electrodes, to the filter so as to be spaced apart from each other, and electrical lines extending from the respective electrodes to a power source. A state detector detects a change in electrical output from the electrical circuit when metal pieces adhere between the pair of permanent magnets, thereby detecting the state of the metal pieces contained in the lubricating oil.Type: ApplicationFiled: December 11, 2017Publication date: September 9, 2021Applicant: NTN CORPORATIONInventor: Hiroyoshi ITO
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Patent number: 10359077Abstract: The present invention provides an abnormality detector for a rolling bearing including an outer race, and an inner race. The abnormality detector includes a filter configured to prevent metal pieces contained in lubricating oil flowing through the bearing space between the outer and inner races from passing through the filter, while allowing the lubricating oil to pass through the filter so as to flow to the outside space of the bearing space; an electric circuit including a pair of permanent magnets mounted, as a pair of electrodes, to the filter so as to be spaced apart from each other, and lines extending from the respective electrodes to a power source; and an output detector configured to detect a change in electrical output from the electric circuit when metal pieces adhere between the pair of permanent magnets, thereby detecting the state of metal pieces contained in the lubricating oil.Type: GrantFiled: July 29, 2016Date of Patent: July 23, 2019Assignee: NTN CorporationInventors: Hiroyoshi Ito, Naota Yamamoto, Shota Toho
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Patent number: 10352821Abstract: Provided is a railway vehicle bearing abnormality sensing system that can accurately perform abnormality determination for railway vehicle bearings. The system (100) senses an abnormality in a plurality of rolling bearings (17) housed in an axle box (3) provided to a bogie (2). The system (100) includes: vibration detection devices (15) each detecting vibration of a rolling bearing; an analysis device (6) determining an abnormality in the bearings (17) on the basis of detection data detected by the device (15); and reception response detection start module (13) receiving a detection start signal and cause the device (15) to detect vibration of the rolling bearing. The system (100) further includes a measurement start command transmitting device (4), installed apart from a railway vehicle, transmitting the detection start signal to the module (13).Type: GrantFiled: March 8, 2017Date of Patent: July 16, 2019Assignee: NTN CORPORATIONInventors: Hiroyoshi Ito, Katsuyoshi Suzuki
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Patent number: 10302132Abstract: A rolling bearing includes rolling elements between an outer race and an inner race, a resin seal ring covering an opening of at least one end of a bearing space, and a filter covering an oil hole defined in the resin seal ring for capturing foreign matter contained in lubricating oil. The filter and the resin seal ring are integrated by insert molding and are made of the same material. An annular lip portion, which is separate from the resin seal ring, is in contact with the outer race. An engaged portion on a radially inner side of the resin seal ring is engaged in a recess defined in the inner race such that, during thermal expansion of the resin seal ring, the engaged portion is engaged such that the resin seal ring is movable in a radial direction relative to the inner race.Type: GrantFiled: September 28, 2016Date of Patent: May 28, 2019Assignee: NTN CORPORATIONInventors: Katsunori Sone, Naota Yamamoto, Hiroyoshi Ito, Kiyoshige Yamauchi, Hiroyuki Miyazaki, Takashi Ito
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Publication number: 20180223907Abstract: The present invention provides an abnormality detector for a rolling bearing including an outer race, and an inner race. The abnormality detector includes a filter configured to prevent metal pieces contained in lubricating oil flowing through the bearing space between the outer and inner races from passing through the filter, while allowing the lubricating oil to pass through the filter so as to flow to the outside space of the bearing space; an electric circuit including a pair of permanent magnets mounted, as a pair of electrodes, to the filter so as to be spaced apart from each other, and lines extending from the respective electrodes to a power source; and an output detector configured to detect a change in electrical output from the electric circuit when metal pieces adhere between the pair of permanent magnets, thereby detecting the state of metal pieces contained in the lubricating oil.Type: ApplicationFiled: July 29, 2016Publication date: August 9, 2018Applicant: NTN CORPORATIONInventors: Hiroyoshi ITO, Naota YAMAMOTO, Shota TOHO
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Patent number: 9920791Abstract: A rolling bearing with a rotation sensor includes an inner race and an outer race, one of which is a rotating race and the other of which is a stationary race. An annular magnetic encoder alternately magnetized in opposite polarities in its circumferential direction is mounted on the rotating race. A magnetic sensor configured to detect the changes in magnetic flux when the magnetic encoder is rotated is mounted in a resin sensor housing mounted on the stationary race. The sensor housing is made of a resin material including a resin composition containing polyphenylene sulfide, an inorganic filler, and glass fiber.Type: GrantFiled: November 4, 2014Date of Patent: March 20, 2018Assignee: NTN CORPORATIONInventor: Hiroyoshi Ito
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Patent number: 9752617Abstract: An annular sensor holder (5) has an axial end (15) including a protrusion (18). The axial end (15) is fitted in a circumferential groove (7), such as a seal groove, of a bearing race (2) fitted to a stationary member (9) so that the sensor holder (5) can slide in the circumferential direction relative to the bearing race (2). In this state, the sensor holder (5) is coupled to the stationary member (9) by a fixing arrangement (19). Thus, when the bearing race (2) creeps, the sensor holder (5) slides relative to the bearing race (2) and does not rotate relative to the stationary member (9). This prevents breakage of connecting wires.Type: GrantFiled: August 23, 2011Date of Patent: September 5, 2017Assignee: NTN CORPORATIONInventors: Seiichi Takada, Hiroyoshi Ito
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Publication number: 20170176287Abstract: Provided is a railway vehicle bearing abnormality sensing system that can accurately perform abnormality determination for railway vehicle bearings. The system (100) senses an abnormality in a plurality of rolling bearings (17) housed in an axle box (3) provided to a bogie (2). The system (100) includes: vibration detection devices (15) each detecting vibration of a rolling bearing; an analysis device (6) determining an abnormality in the bearings (17) on the basis of detection data detected by the device (15); and reception response detection start module (13) receiving a detection start signal and cause the device (15) to detect vibration of the rolling bearing. The system (100) further includes a measurement start command transmitting device (4), installed apart from a railway vehicle, transmitting the detection start signal to the module (13).Type: ApplicationFiled: March 8, 2017Publication date: June 22, 2017Applicant: NTN CORPORATIONInventors: Hiroyoshi ITO, Katsuyoshi SUZUKI
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Publication number: 20170159713Abstract: The present invention relates to a lubricating oil supply unit including a holding portion (a lubricating oil tank) holding a lubricating oil supplied to the inside of a bearing, a supply portion (a drive circuit and a pump) supplying the lubricating oil to the inside of the bearing from the holding portion, and a control unit (a control circuit) for controlling operations of the supply portion, the control unit being configured to obtain data on a condition of supply of the lubricating oil and to output the data to the outside of the control unit (an output substrate).Type: ApplicationFiled: June 23, 2015Publication date: June 8, 2017Applicant: NTN CorporationInventors: Hiroyoshi ITO, Masaya TOMINAGA
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Patent number: 9624978Abstract: A bearing device is constituted by a rolling bearing and a lubricant supply device combined with each other. The lubricant supply device includes a lubrication oil tank which stores pressurized lubrication oil and has a lubrication oil discharge spout; an open/close valve which opens/closes the lubrication oil discharge spout of the lubrication oil tank; a driving section which operates the open/close valve; and an electric power source section which generates electric energy for operation of the driving section. The lubricant supply device is attached to the rolling bearing or to a spacer adjacent thereto.Type: GrantFiled: September 6, 2012Date of Patent: April 18, 2017Assignee: NTN CORPORATIONInventors: Hiroyoshi Ito, Kaoru Oomoto
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Publication number: 20170037902Abstract: A rolling bearing includes rolling elements incorporated between an outer race and an inner race, a resin seal ring covering the opening of at least one end of the bearing space, and a filter covering an oil hole formed in the seal ring for capturing foreign matter contained in lubricating oil. The filter and the resin seal ring are integrated by insert molding. The filter and the seal ring are made of the same material. An annular lip portion, which is separate from the seal ring, is in contact with the outer race. An engaged portion provided on the radially inner side of the seal ring is engaged in a recess formed in the inner race such that, during thermal expansion of the seal ring, the engaged portion is engaged such that the seal ring is movable in the radial direction relative to the inner race.Type: ApplicationFiled: September 28, 2016Publication date: February 9, 2017Inventors: Katsunori SONE, Naota YAMAMOTO, Hiroyoshi ITO, Kiyoshige YAMAUCHI, Hiroyuki MIYAZAKI, Takashi ITO
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Patent number: 9506554Abstract: A rolling bearing includes rolling elements incorporated between an outer race and an inner race, a resin seal ring covering the opening of at least one end of the bearing space, and a filter covering an oil hole formed in the seal ring for capturing foreign matter contained in lubricating oil. The filter and the resin seal ring are integrated by insert molding. The filter and the seal ring are made of the same material. An annular lip portion, which is separate from the seal ring, is in contact with the outer race. An engaged portion provided on the radially inner side of the seal ring is engaged in a recess formed in the inner race such that, during thermal expansion of the seal ring, the engaged portion is engaged such that the seal ring is movable in the radial direction relative to the inner race.Type: GrantFiled: March 22, 2012Date of Patent: November 29, 2016Assignee: NTN CORPORATIONInventors: Katsunori Sone, Naota Yamamoto, Hiroyoshi Ito, Kiyoshige Yamauchi, Hiroyuki Miyazaki, Takashi Ito
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Publication number: 20160265595Abstract: A rolling bearing with a rotation sensor includes an inner race and an outer race, one of which is a rotating race and the other of which is a stationary race. An annular magnetic encoder alternately magnetized in opposite polarities in its circumferential direction is mounted on the rotating race. A magnetic sensor configured to detect the changes in magnetic flux when the magnetic encoder is rotated is mounted in a resin sensor housing mounted on the stationary race. The sensor housing is made of a resin material including a resin composition containing polyphenylene sulfide, an inorganic filler, and glass fiber.Type: ApplicationFiled: November 4, 2014Publication date: September 15, 2016Inventor: Hiroyoshi ITO
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Patent number: 9377053Abstract: A rolling bearing device has an oil supply unit which includes: a lubrication oil tank with a discharge port of a lubrication oil; a pump which sucks the lubrication oil from the lubrication oil tank and discharges the lubrication oil; and an electric power source section for driving the pump. The oil supply unit is disposed inside the rolling bearing or inside a spacer which is placed adjacent to the rolling bearing, and the pump is operated intermittently. The electric power source section for driving the pump includes: a power generator section which generates power by temperature difference between inner and outer rings in the rolling bearing; and a charging section which stores the electric power from the power generator section. The pump is driven when a voltage in the charging section attains a driving voltage for the pump.Type: GrantFiled: August 12, 2013Date of Patent: June 28, 2016Assignee: NTN CorporationInventors: Hiroyoshi Ito, Kaoru Oomoto
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Patent number: 9350346Abstract: There are: a communication sheet that propagates electromagnetic wave; a wireless communication part arranged close to the communication sheet, and stores predetermined information, and wirelessly transmits the predetermined information to the communication sheet; a shield part that shields a radio signal wirelessly transmitted from the wireless communication part; an operation part that enables or disables wireless communication between the communication sheet and the wireless communication part; and a discrimination part that discriminates contents of operation by the operation part based on the predetermined information wirelessly transmitted by the wireless communication part. According to an operation by said operation part to disable the wireless communication between said communication sheet and the wireless communication part, said shield part shields the radio signal from the wireless communication part.Type: GrantFiled: November 18, 2009Date of Patent: May 24, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyoshi Ito, Hiroya Ando, Norio Abe, Nobuyuki Nakagawa, Yusuke Satoh
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Patent number: 9347495Abstract: A bearing assembly having an RFID (radio frequency identification) function, which can implement a communication and has a capability of accomplishing information communication on a non-contact basis. This bearing assembly includes an inlet, including an IC chip and an antenna connected with such IC chip, and a magnetic sheet, both of which are embedded in overlapped relation to each other in a bearing seal for sealing a bearing space.Type: GrantFiled: January 15, 2013Date of Patent: May 24, 2016Assignee: NTN CORPORATIONInventor: Hiroyoshi Ito
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Publication number: 20150240872Abstract: A rolling bearing device has an oil supply unit which includes: a lubrication oil tank with a discharge port of a lubrication oil; a pump which sucks the lubrication oil from the lubrication oil tank and discharges the lubrication oil; and an electric power source section for driving the pump. The oil supply unit is disposed inside the rolling bearing or inside a spacer which is placed adjacent to the rolling bearing, and the pump is operated intermittently. The electric power source section for driving the pump includes: a power generator section which generates power by temperature difference between inner and outer rings in the rolling bearing; and a charging section which stores the electric power from the power generator section. The pump is driven when a voltage in the charging section attains a driving voltage for the pump.Type: ApplicationFiled: August 12, 2013Publication date: August 27, 2015Inventors: Hiroyoshi Ito, Kaoru Oomoto
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Patent number: 9048690Abstract: Provided is an in-vehicle power supply apparatus which supplies power to both a high-power load such as an actuator, and the CPU for controlling the high-lower load, and which is capable of preventing reduction in voltage of the CPU even when voltage of the in-vehicle power supply is momentarily reduced due to power consumption of the high-power load, and which include an auxiliary power supply having its capacity reduced so as to enable reduction of the size of the power supply apparatus.Type: GrantFiled: October 1, 2008Date of Patent: June 2, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hiroyoshi Ito