Patents by Inventor Takahisa Suzuki

Takahisa Suzuki 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: 10450527
    Abstract: A method including substituting an atmosphere in a space, in which a sliding surface formed of a metal or a ceramic material, and a slid surface are disposed, with a gas atmosphere containing a hydroxyl group-containing compound and at least one of hydrogen and nitrogen, and relatively sliding the sliding surface against the slid surface by a Hertzian contact stress of 1.0 GPa or more in the space under the gas atmosphere containing the hydroxyl group-containing compound at least one of hydrogen and nitrogen. As a result, it is possible to form, on the sliding surface, a low-friction coating that stably exhibits a significantly low friction coefficient, for example, of 10?4 order (less than 0.001).
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: October 22, 2019
    Assignees: JTEKT CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Takahisa Kato, Masataka Nosaka, Mamoru Tohyama, Masahiro Suzuki
  • Patent number: 10425879
    Abstract: A control device includes: a processor configured to: control a multihop communication path in a wireless network that includes a node group; when a first power storage speed of a target relay node in the node group is negative, calculate a first estimated time that is needed to reach a target power-storage value in a case where the target relay node is in a non-relay operating state; and in accordance with a length of the first estimated time calculated, change a state of the target relay node into the non-relay operating state or a stop state and change a state of another node, which is in the non-relay operating state, into a relay operating state.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: September 24, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Koichiro Yamashita, Toshiya Otomo, Takahisa Suzuki, Koji Kurihara
  • Patent number: 10422626
    Abstract: A position measuring apparatus instructs a first node to emit light by transmitting a first light emission pattern to the first node, instructs a second node to emit light by transmitting the first light emission pattern to the second node, when light emission following the instructed first light emission pattern is detected, and instructs the second node to emit light by transmitting a second light emission pattern that is different from the first light emission pattern, when light emission following the instructed first light emission pattern is not detected.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: September 24, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Takahisa Suzuki, Koichiro Yamashita, Koji Kurihara
  • Patent number: 10414996
    Abstract: A method including substituting an atmosphere in a space, in which a sliding surface formed of a metal or a ceramic material, and a slid surface are disposed, with a gas atmosphere containing a hydroxyl group-containing compound and at least one of hydrogen and nitrogen, and relatively sliding the sliding surface against the slid surface by a Hertzian contact stress of 1.0 GPa or more in the space under the gas atmosphere containing the hydroxyl group-containing compound at least one of hydrogen and nitrogen. As a result, it is possible to form, on the sliding surface, a low-friction coating that stably exhibits a significantly low friction coefficient, for example, of 10?4 order (less than 0.001).
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: September 17, 2019
    Assignees: JTEKT CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Takahisa Kato, Masataka Nosaka, Mamoru Tohyama, Masahiro Suzuki
  • Patent number: 10368727
    Abstract: An endoscope which promotes downsizing and cost reduction, and a manufacturing method of an endoscope are provided. For this reason, in an endoscope, a lens unit containing a lens in a lens tube, an image capturing element of which an image capturing surface is covered with element cover glass, and an adhesive resin fixing the lens unit of which an optical axis of the lens is coincident with the center of the image capturing surface to the element cover glass with a separation portion are disposed.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: August 6, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akinori Osada, Takafumi Sanada, Yasuyuki Hanada, Naoyuki Haraguchi, Takahisa Suzuki, Tooru Tanaka, Hiroshi Nagayasu
  • Patent number: 10358706
    Abstract: Provided is a carbonitrided bearing part which has high hardenability and toughness, and is excellent in wear resistance and surface-originated flaking life. A carbonitrided bearing part of the present embodiment has a chemical composition containing, in mass %, C: 0.15 to 0.45%, Si: not more than 0.50%, Mn: 0.40 to 1.50%, P: not more than 0.015%, S: not more than 0.005%, Cr: 0.30 to 2.0%, Mo: 0.10 to 0.35%, V: 0.20 to 0.40%, Al: 0.005 to 0.10%, N: not more than 0.030%, and O: not more than 0.0015%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2). At surface, C concentration is 0.7 to 1.2%, N concentration is 0.15 to 0.6%, and Rockwell hardness HRC is 58 to 65. 1.20<0.4Cr+0.4Mo+4.5V<2.60??(1) 2.7C+0.4Si+Mn+0.8Cr+Mo+V>2.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: July 23, 2019
    Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, JTEKT CORPORATION
    Inventors: Yutaka Neishi, Takahisa Suzuki, Tatsuya Koyama, Shingo Yamasaki, Kohei Kanetani, Takashi Sada
  • Patent number: 10329509
    Abstract: A low-friction coating includes: an aliphatic hydrocarbon group showing a peak in a region of 2,900 cm?1 to 3000 cm?1 in an infrared absorption spectrum; a carbonyl group showing a peak in a region of 1,650 cm?1 to 1,800 cm?1 in an infrared absorption spectrum; an aromatic component (C7H7+) showing a peak at mass 91.1 in a positive ion spectrum obtained by TOF-SIMS; and a condensed ring based component (C9H7+) showing a peak at mass 115.2 in the positive ion spectrum obtained by TOF-SIMS.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: June 25, 2019
    Assignees: JTEKT CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Takahisa Kato, Masataka Nosaka, Mamoru Tohyama, Atsushi Murase, Kyoko Nakai, Masahiro Suzuki
  • Publication number: 20190063497
    Abstract: A rolling sliding member includes a base part and a surface layer. The base part has a composition that includes 0.30 mass % to 0.45 mass % of carbon, 0.15 mass % to 0.45 mass % of silicon, 0.40 to 1.50 mass % of manganese, 0.60 mass % to 2.00 mass % of chromium, 0.10 mass % to 0.35 mass % of molybdenum, 0.20 mass % to 0.40 mass % of vanadium, and 0.005 mass % to 0.100 mass % of aluminum, and a remainder of iron and inevitable impurities. The surface layer is positioned around the base part. The surface layer has a Vickers hardness of 700 to 800 and a retained austenite content of 25 volume % to 50 volume %. The thickness of a grain boundary oxide layer satisfies Formula: thickness of grain boundary oxide layer?equivalent diameter of rolling sliding member×1.4×10?3.
    Type: Application
    Filed: August 20, 2018
    Publication date: February 28, 2019
    Applicants: JTEKT CORPORATION, NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kohei KANETANI, Takashi SADA, Tomohiro YAMASHITA, Takahisa SUZUKI, Yutaka NEISHI, Daisuke HIRAKAMI
  • Publication number: 20190032177
    Abstract: There is provided a spring steel including predetermined chemical composition, in which ([Ti mass %]?3.43×[N mass %])/[S mass %]>4.0, and [Ni mass %]+[Cu mass %]<0.75 are satisfied, and an appearance frequency of MnS is less than 20% among inclusions having an equivalent circle diameter of 1 ?m or more which are observed at a 1/4 position of a diameter from a surface.
    Type: Application
    Filed: January 26, 2017
    Publication date: January 31, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Takahisa SUZUKI, Suguru YOSHIDA, Yutaka NEISHI
  • Patent number: 10178629
    Abstract: A communications node includes a first transmitting circuit configured to transmit to plural communications nodes, a confirmation signal for confirming whether response is possible; a receiving circuit configured to receive from first communications nodes capable of responding among the plural communications nodes, a response signal for the transmitted confirmation signal; a selecting circuit configured to select from among the first communications nodes and based on reception strength of the received response signal, a second communications node to which execution of data processing is requested by the communications node; a strength calculating circuit configured to calculate based on the reception strength of the response signal from the selected second communications node, a transmission strength to the second communications node; and a second transmitting circuit configured to transmit to the second communications node and based on the calculated transmission strength, a request signal requesting executi
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: January 8, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Hiromasa Yamauchi, Koichiro Yamashita, Takahisa Suzuki, Toshiya Otomo, Miyoshi Saito
  • Patent number: 10172021
    Abstract: A first node included in a first layer determines whether there has occurred a failure in a sink node included in a second layer subordinate to the first layer. The first node requests a second node included in the second layer to collect information of a third node included in a third layer subordinate to the second layer when the first node determines that there has occurred a failure in the sink node. The first node determines a fourth node serving as a substitute for the failed sink node included in the second layer on a basis of the information of the third node collected by the second node.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: January 1, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Toshiya Otomo, Koichiro Yamashita, Takahisa Suzuki, Hiromasa Yamauchi
  • Patent number: 10098071
    Abstract: An observation system includes a plurality of nodes and an observation apparatus that collects information from the nodes using multi-hop communication for communicating with the nodes. The observation apparatus includes a link quality indicator (LQI) determination section and an output control section. The LQI determination section determines whether an LQI received from a node using the multi-hop communication is larger than a first threshold. When the LQI is larger than the first threshold, the output control section outputs a reduction command to the node associated with the LQI, the reduction command being a command to change the amount of transmission power in the multi-hop communication.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 9, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Koji Kurihara, Koichiro Yamashita, Takahisa Suzuki
  • Patent number: 10097425
    Abstract: A data network management system includes a data network management apparatus; and plural data processing apparatuses installed in an installation area and configured to transmit data to the data network management apparatus. The plural data processing apparatuses transmit identification information thereof together with the processed data to the data network management apparatus. The data network management apparatus determines based on identification information of data processing apparatuses that have completed a given authentication test among the plural data processing apparatuses and the identification information obtained from the plural data processing apparatuses installed in the installation area, a first data processing apparatus from which the data is to be obtained among the plural data processing apparatuses.
    Type: Grant
    Filed: December 27, 2015
    Date of Patent: October 9, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Hiromasa Yamauchi, Koichiro Yamashita, Takahisa Suzuki, Toshiya Otomo
  • Patent number: 10091095
    Abstract: A system has a group of nodes that perform multi-hop communication therebetween and a communications apparatus that communicates with a node included in the group of nodes. The node adds to data transmitted by the node, a hop count updated each time the data is transferred by the multi-hop communication and a reference hop count for the data to be transferred from the node to the communications apparatus, and transmits the data. The communications apparatus, when receiving the data, compares the reference hop count and the hop count added to the data, and based on a result of comparison, determines whether failure has occurred at a given node in the group of nodes.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: October 2, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Toshiya Otomo, Koichiro Yamashita, Takahisa Suzuki, Hiromasa Yamauchi
  • Patent number: 10091748
    Abstract: Among plural communications nodes that transfer data to a communications apparatus by multihop communication, a communications node includes a transmitting circuit configured to transmit a synchronization request signal requesting transmission of a synchronization signal for synchronizing the multihop communication at the communications node; a receiving circuit configured to receive the synchronization signal in response to the synchronization request signal transmitted by the transmitting circuit; and a power control circuit configured to control the receiving circuit such that a state of the receiving circuit is a first state where power consumption of the receiving circuit is a first power before the transmitting circuit transmits the synchronization request signal and is a second state where the power consumption of the receiving circuit is a second power that is higher than the first power after the transmitting circuit transmits the synchronization request signal.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: October 2, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Toshiya Otomo, Koichiro Yamashita, Takahisa Suzuki, Hiromasa Yamauchi
  • Publication number: 20180230566
    Abstract: Provided is spring steel for suspension suppressing or not requiring addition of expensive alloy elements, having a large tensile strength, and excellent in cold formability and delay fracture resistance, wherein at a cross-section parallel to a rolling direction, 90% or more of the metal microstructures by area fraction is tempered martensite, and at a cross-section parallel to the rolling direction, in a range of 10% of diameter or thickness from the surface, a ratio of a length in a long axis direction of prior austenite grains and a length in a direction perpendicular to the long axis direction of the prior austenite grains is 1.5 or more and a ratio of <011> fraction/<111> fraction of martensite texture as seen from the rolling direction is 3.0 or more.
    Type: Application
    Filed: July 27, 2016
    Publication date: August 16, 2018
    Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION, NETUREN CO., LTD.
    Inventors: Takahisa SUZUKI, Keisuke CHIBA, Hirotsugu MIYAMOTO, Kengo IWANAGA, Tsukasa OKAMURA, Fumiaki FUJIWARA, Yukio EBANA
  • Publication number: 20180225128
    Abstract: A control system includes a server and a plurality of nodes. The server transmits data of command strings being described in combination of sequential processing and loop processing to the nodes. The nodes store the data of command strings received from the server. Each node includes a plurality of application programming interface (API) units that perform predetermined sequential processing. Each node selects an API unit on the basis of the command strings acquired from the server and causes the selected API unit to perform sequential processing and loop processing.
    Type: Application
    Filed: April 9, 2018
    Publication date: August 9, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Koichiro YAMASHITA, Takahisa SUZUKI, Koji KURIHARA
  • Patent number: 9996132
    Abstract: A distributed processing method of a system in which communications apparatuses communicate data by multi-hop communication is executed by a given communications apparatus among the communications apparatuses. According to the method, the given communications apparatus executes a given process based on a result of a first process executed by a first communications apparatus that among the communications apparatuses, communicates directly with the given communications apparatus and operates using power stored in a charging device charged by power generated from energy obtained corresponding to an environment where installed. The given communications apparatus executes the given process when receiving the result of the first process from the first communications apparatus.
    Type: Grant
    Filed: January 17, 2016
    Date of Patent: June 12, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Toshiya Otomo, Koichiro Yamashita, Takahisa Suzuki, Hiromasa Yamauchi
  • Publication number: 20180142333
    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: Application
    Filed: May 13, 2016
    Publication date: May 24, 2018
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Takahisa SUZUKI, Manabu KUBOTA, Shuji KOZAWA, Hirotsugu MIYAMOTO
  • Patent number: 9970761
    Abstract: An event location analysis system includes a first wireless terminal device. The first wireless terminal device includes a first measurement unit, a second measurement unit, and a first processor. The second measurement unit consumes larger amounts of power than the first measurement unit consumes. The first processor is configured to transmit a first notification signal upon detecting a first event on basis of a measurement value of the first measurement unit. The first processor is configured to start the second measurement unit upon receiving a second notification signal. The first processor is configured to activate a measurement operation of the first measurement unit and a measurement operation of the second measurement unit after the second measurement unit is started. The first processor is configured to stop the measurement operation of the second measurement unit after a predetermined time has elapsed since the start of the second measurement unit.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: May 15, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Takahisa Suzuki, Koichiro Yamashita, Koji Kurihara, Toshiya Otomo