Patents by Inventor Takafumi Kato

Takafumi Kato 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: 10408677
    Abstract: A spectrometer includes a support having a bottom wall part in which a depression is provided and a side wall part, a light detection element supported by the side wall part while opposing the depression, a resin layer disposed at least on an inner surface of the depression, and a dispersive part provided in the resin layer on the inner surface of the depression. The resin layer is in contact with an inner surface of the side wall part. A thickness of the resin layer in a first direction in which the depression and the light detection element oppose each other is larger in a part in contact with the inner surface of the side wall part than in a part disposed on the inner surface of the depression.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: September 10, 2019
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Takafumi Yokino, Katsumi Shibayama, Katsuhiko Kato
  • Patent number: 10386552
    Abstract: An optical element includes a base having a curved depression formed in a front surface thereof and a formed layer arranged on the base. The formed layer includes a main part in the depression as viewed from a depth direction of the depression and an overhang on the front surface of the base while connecting to the main part. An opposite surface of the main part to a surface thereof on a side of an inner surface of the depression is formed like a concave curve that is concave in a same direction as the inner surface of the depression. A predetermined surface of the main part that is opposed to the inner surface of the depression is provided with an optical function part.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: August 20, 2019
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Katsumi Shibayama, Takafumi Yokino, Katsuhiko Kato
  • Publication number: 20190250036
    Abstract: A spectrometer includes a support having a bottom wall part in which a depression including a concave curved inner surface and a peripheral part adjacent to the depression are provided, and a side wall part disposed on a side on which the depression is open with respect to the bottom wall part, a light detection element supported by the side wall part while opposing the depression, and a dispersive part disposed on the inner surface of the depression. A length of the depression in a second direction in which a plurality of grating grooves included in the dispersive part is aligned is larger than a length of the depression in a third direction orthogonal to the second direction when viewed in a first direction in which the depression and the light detection element oppose each other. An area of the peripheral part adjacent to the depression in the second direction is larger than an area of the peripheral part adjacent to the depression in the third direction when viewed in the first direction.
    Type: Application
    Filed: March 5, 2019
    Publication date: August 15, 2019
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Takafumi YOKINO, Katsumi SHIBAYAMA, Katsuhiko KATO
  • Patent number: 10364779
    Abstract: An air cleaner for an internal combustion engine is arranged to reduce intake noise. The air cleaner includes an air cleaner element for cleaning an intake air, and an elastic member for reducing intake noise by utilizing an inside space of the air cleaner. An inside space of the elastic member is in communication with the inside space of the air cleaner through a communication passage. Preferably, a surrounding space formed between the elastic member and a case portion for receiving the elastic member is opened to the outside.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: July 30, 2019
    Assignee: MAHLE FILTER SYSTEMS JAPAN CORPORATION
    Inventors: Katsuhisa Ohta, Yuichi Kato, Takafumi Shibata
  • Patent number: 10332845
    Abstract: A semiconductor device includes: an upper-surface electrode on an upper surface of a semiconductor element; a plated layer on an upper surface of the upper-surface electrode; gate runners penetrating the plated layer and formed to extend above the upper surface of the semiconductor element; and a metal connecting plate arranged above the plated layer and electrically connected to the upper-surface electrode, wherein the metal connecting plate has a joint portion parallel to the upper surface of the semiconductor element and has a rising portion at an end of the joint portion, the rising portion extending in a direction away from the semiconductor element, and in a plane parallel to the upper surface of the semiconductor element, a first distance, which is a shortest distance between the rising portion and the gate runner not intersecting the rising portion, is equal to or longer than 1 mm.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: June 25, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Takafumi Yamada, Hiromichi Gohara, Ryoichi Kato, Kohei Yamauchi
  • Publication number: 20190154504
    Abstract: A spectrometer 1A includes a package 2 having a stem 4 and a cap 5, an optical unit 10A disposed on the stem 4, and a lead pin 3 for securing the optical unit 10A to the stem 4. The optical unit 10A includes a dispersive part 21 for dispersing and reflecting light entering from a light entrance part 6 of the cap 5, a light detection element 30 having a light detection part 31 for detecting the light dispersed and reflected by the dispersive part 21, a support 40 for supporting the light detection element 30 such that a space is formed between the dispersive part 21 and the light detection element 30, and a projection 11 protruding from the support 40, the lead pin 3 being secured to the projection 11. The optical unit 10A is movable with respect to the stem 4 in a contact part of the optical unit 10A and the stem 4.
    Type: Application
    Filed: January 17, 2019
    Publication date: May 23, 2019
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Takafumi YOKINO, Katsumi SHIBAYAMA, Katsuhiko KATO
  • Patent number: 10160283
    Abstract: A relative velocity between a sprung mass and an unsprung mass of a vehicle is calculated by differentiating a stroke amount of an electromagnetic damper with respect to time. The relative velocity is compared with a predetermined value that is set in advance, and a determination is made whether or not the relative velocity is the predetermined value or higher. In a case where the relative velocity is lower than the predetermined value (relative velocity<predetermined value), a normal filter is selected, and a gain G of only an unsprung resonance frequency range is increased. On the other hand, in a case where the relative velocity is the predetermined value or higher (relative velocity?predetermined value), a delay inhibition filter is selected, and a gain of a high frequency range is increased compared to the normal filter.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: December 25, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Tomoya Toyohira, Takafumi Kato, Satoshi Ohno, Atsuhiko Yoneda
  • Publication number: 20180361816
    Abstract: An object of the present invention is to obtain an electromagnetic suspension apparatus capable of quickly reducing an influence of a mechanical frictional force generated in each part of an electromagnetic actuator. The electromagnetic suspension apparatus includes an electromagnetic actuator that generates a driving force related to a damping operation and an expansion and contraction, an information acquisition unit that acquires vehicle state information including a stroke speed of the electromagnetic actuator, an equivalent frictional force calculation unit that calculates an equivalent frictional force of the electromagnetic actuator based on the vehicle state information, and an ECU that calculates a target driving force of the electromagnetic actuator and controls the driving force of the electromagnetic actuator using the calculated target driving force. The ECU corrects the target driving force based on the equivalent frictional force calculated by the equivalent frictional force calculation unit.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 20, 2018
    Inventors: Satoshi OHNO, Atsuhiko YONEDA, Takafumi KATO, Tomoya TOYOHIRA
  • Publication number: 20180361813
    Abstract: Provided is an electromagnetic suspension apparatus capable of achieving both of vibration isolation performance and road holding performance. The electromagnetic suspension apparatus includes an electromagnetic actuator, an information acquisition unit that acquires information on a stroke speed of the electromagnetic actuator and a state quantity of the vehicle, a plurality of filters in which individual gain characteristics are respectively set, a filter setting unit that selectively sets a filter having a gain characteristic suitable for the state quantity of the vehicle from among the plurality of filters, a filter processing unit that performs a filtering process on a stroke speed signal using the filter set by the filter setting unit, and a drive control unit that controls driving of the electromagnetic actuator based on relationship information between the stroke speed after the filtering process and a damping force corresponding to the stroke speed.
    Type: Application
    Filed: May 14, 2018
    Publication date: December 20, 2018
    Inventors: Satoshi OHNO, Tomoya TOYOHIRA, Takafumi KATO, Atsuhiko YONEDA
  • Publication number: 20180361814
    Abstract: An object of the present invention is to obtain an electromagnetic suspension apparatus capable of meeting a request to improve ride comfort irrespective of a magnitude of a spring constant preset in a spring member. The electromagnetic suspension apparatus includes an electromagnetic actuator that generates a driving force related to vibration damping of the vehicle body, an information acquisition unit that acquires information on a stroke position of the electromagnetic actuator, and an ECU that calculates a target driving force of the electromagnetic actuator and controls a driving force of the electromagnetic actuator using the calculated target driving force. When the stroke position acquired by the information acquisition unit is in a neutral range including a neutral position, the ECU corrects the target driving force so as to reduce a spring force related to the spring member as compared with when the stroke position is in a non-neutral range.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 20, 2018
    Inventors: Satoshi OHNO, Tomoya TOYOHIRA, Takafumi KATO, Atsuhiko YONEDA
  • Publication number: 20180297434
    Abstract: An electromagnetic suspension device includes: an electromagnetic actuator which is disposed side by side with a spring member provided between a body and a wheel of a vehicle and which produces a driving force for damping operation and extending and contracting operation; an information acquisition unit which acquires the stroke position of the electromagnetic actuator; and an ECU which sets a target damping force and a target stretching force and controls a driving force of the electromagnetic actuator by using a target driving force based on the set target damping force and target stretching force. When the stroke position acquired by the information acquisition unit is in an end region close to a stroke end, the ECU corrects the target driving force such that the stroke position shifts from the end region toward a neutral region.
    Type: Application
    Filed: April 16, 2018
    Publication date: October 18, 2018
    Inventors: Satoshi OHNO, Tomoya TOYOHIRA, Takafumi KATO, Atsuhiko YONEDA
  • Patent number: 10074660
    Abstract: In a semiconductor memory device, voltage application from a memory gate electrode of the memory capacitor to a word line can be blocked by a rectifier element depending on values of voltages applied to the memory gate electrode and the word line without using a conventional control circuit. The configuration eliminates the need to provide a switch transistor and a switch control circuit for turning on and off the switch transistor as in conventional cases, and accordingly achieves downsizing. In the semiconductor memory device, for example, each bit line contact is shared by four anti-fuse memories adjacent to each other and each word line contact is shared by four anti-fuse memories adjacent to each other, thereby achieving downsizing of the entire device as compared to a case in which the bit line contact and the word line contact are individually provided to each anti-fuse memory.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: September 11, 2018
    Assignee: FLOADIA CORPORATION
    Inventors: Hideo Kasai, Yasuhiro Taniguchi, Yasuhiko Kawashima, Ryotaro Sakurai, Yutaka Shinagawa, Tatsuro Toya, Takanori Yamaguchi, Fukuo Owada, Shinji Yoshida, Teruo Hatada, Satoshi Noda, Takafumi Kato, Tetsuya Muraya, Kosuke Okuyama
  • Publication number: 20180156303
    Abstract: A vehicle suspension system (3) includes an electromagnetic damper (7) provided with a sprung member (8) and an unsprung member (9) to apply a drive force and a damping force between the sprung member and the unsprung member, and a control unit (10) for controlling the electromagnetic damper. A target load for the electromagnetic damper is determined based on the unsprung member demand load that attenuates a vertical vibration of the unsprung member, and the sprung member demand load that restrains a vertical displacement of the sprung member. An absolute value of the sprung member demand load is reduced when a sprung member frequency is in an unsprung member resonance frequency range.
    Type: Application
    Filed: May 15, 2017
    Publication date: June 7, 2018
    Inventors: Tomoya Toyohira, Takafumi Kato, Satoshi Ohno, Atsuhiko Yoneda
  • Publication number: 20180134111
    Abstract: A vehicle suspension system (3) is provided that allows attention eliciting information such as rumble strips, bumps and road markers to be conveyed to the vehicle operator substantially without detracting from the performance of the vehicle suspension system. A control unit (10) determines if a prescribed warning condition exists according to vehicle information and/or road surface information acquired by an information acquiring unit, and performs a warning control including an extending and retracting movement of the actuator interposed between an sprung member (8) and an unsprung member (9) of the vehicle at a prescribed frequency when the warning condition is determined.
    Type: Application
    Filed: May 15, 2017
    Publication date: May 17, 2018
    Inventors: Tomoya Toyohira, Takafumi Kato, Atsuhiko Yoneda
  • Publication number: 20180093209
    Abstract: A fuel filter has a case. The case has a cup and cap. The cup and the cap can be detached and attached by an engaging mechanism. The case has an air passage for discharging air. The air passage has an annular capturing passage formed between the cup and the cap. A plurality of through holes are formed on the cap. The plurality of through holes are dispersively arranged along the capturing passage. Air flows into the capturing passage through the through hole. Air reaches to a lead-out passage through the capturing passage. Air is discharged through the outlet passage from the lead-out passage.
    Type: Application
    Filed: February 9, 2016
    Publication date: April 5, 2018
    Inventors: Takafumi KATO, Toshiyuki YONEMOTO
  • Patent number: 9926899
    Abstract: A fuel-filter abnormality detection device is used for a subject filter provided in a fuel supply device of an engine to filtrate a fuel. The fuel-filter abnormality detection device includes a first filter attachable downstream of the subject filter in fuel flow. A filtration capacity of the first filter is smaller than a filtration capacity of the subject filter, and the first filter traps a foreign matter on a downstream side of the subject filter to cause a change in fuel pressure indicating an abnormality of the subject filter. The fuel-filter abnormality detection device may include a bypass passage through which the fuel bypasses the first filter, a bypass control valve configured to allow the fuel to flow through the bypass passage when the abnormality of the subject filter is detected, and a second filter filtrating the fuel flowing through the bypass passage.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: March 27, 2018
    Assignee: KYOSAN DENKI CO., LTD.
    Inventors: Takafumi Kato, Toshiyuki Yonemoto, Katsumi Mori
  • Publication number: 20180019248
    Abstract: In a semiconductor memory device, voltage application from a memory gate electrode of the memory capacitor to a word line can be blocked by a rectifier element depending on values of voltages applied to the memory gate electrode and the word line without using a conventional control circuit. The configuration eliminates the need to provide a switch transistor and a switch control circuit for turning on and off the switch transistor as in conventional cases, and accordingly achieves downsizing. In the semiconductor memory device, for example, each bit line contact is shared by four anti-fuse memories adjacent to each other and each word line contact is shared by four anti-fuse memories adjacent to each other, thereby achieving downsizing of the entire device as compared to a case in which the bit line contact and the word line contact are individually provided to each anti-fuse memory.
    Type: Application
    Filed: February 19, 2016
    Publication date: January 18, 2018
    Inventors: Hideo KASAI, Yasuhiro TANIGUCHI, Yasuhiko KAWASHIMA, Ryotaro SAKURAI, Yutaka SHINAGAWA, Tatsuro TOYA, Takanori YAMAGUCHI, Fukuo OWADA, Shinji YOSHIDA, Teruo HATADA, Satoshi NODA, Takafumi KATO, Tetsuya MURAYA, Kosuke OKUYAMA
  • Publication number: 20170267051
    Abstract: A relative velocity between a sprung mass and an unsprung mass of a vehicle is calculated by differentiating a stroke amount of an electromagnetic damper with respect to time. The relative velocity is compared with a predetermined value that is set in advance, and a determination is made whether or not the relative velocity is the predetermined value or higher. In a case where the relative velocity is lower than the predetermined value (relative velocity<predetermined value), a normal filter is selected, and a gain G of only an unsprung resonance frequency range is increased. On the other hand, in a case where the relative velocity is the predetermined value or higher (relative velocity?predetermined value), a delay inhibition filter is selected, and a gain of a high frequency range is increased compared to the normal filter.
    Type: Application
    Filed: March 16, 2017
    Publication date: September 21, 2017
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Tomoya Toyohira, Takafumi Kato, Satoshi Ono, Atsuhiko Yoneda
  • Patent number: 9732823
    Abstract: An electromagnetic damper is attached to a vehicle and causes oscillation damping force using a motor driven with energy from a power source. The electromagnetic damper includes an electrical circuit that causes a coil of the motor to be short-circuited in a state where the energy from the power source to the motor is interrupted.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: August 15, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Takafumi Kato
  • Patent number: 9657806
    Abstract: An electromagnetic damper includes a torque detection unit that detects a torsional torque of an output shaft of an electric motor or a torsional torque of a transmission shaft, which transmits an external vibration to the electric motor, and a control device that controls the electric motor. The control device controls the electric motor so as to cancel the torsional torque detected by the torque detection unit.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: May 23, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Takafumi Kato