Patents by Inventor Kei Sato

Kei Sato 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: 10812001
    Abstract: A control device to control a motor includes a stator including a coil, a rotor including a permanent magnet, a detector that detects a rotational position of the rotor at every predetermined angle and outputs a position signal indicating the detected rotational position, and a controller that receives the position signal output by the detector and adjusts a duty ratio of a driving signal of the rotor by a pulse width modulation scheme based on the received position signal to control rotation of the rotor. The controller raises the duty ratio from a first duty ratio, starting from a point in time at which the position signal is received, and returns the raised duty ratio to the first duty ratio when a next position signal has been received.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: October 20, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Kei Sato, Yuichi Hibi, Yasuhiro Shirai
  • Publication number: 20200321715
    Abstract: A terminal-equipped electric wire includes: an electric wire; and a crimp terminal including a core wire crimp portion crimped to a core wire of the electric wire, in which the core wire crimp portion includes: a bottom wall portion; and crimping pieces that extend in a direction intersecting the bottom wall portion from an end of the bottom wall portion in a width direction and that are wound around the core wire, a cross-sectional shape of the crimping piece is a curved shape convex toward a side opposite to the bottom wall portion, and curved portions of the crimping piece respectively include protrusions formed to protrude stepwise with respect to surrounding portions.
    Type: Application
    Filed: February 27, 2020
    Publication date: October 8, 2020
    Inventors: Hirotaka Takeda, Kei Sato
  • Publication number: 20200313592
    Abstract: A motor control device includes a first control unit performing feedback control on a motor with a command value; one or plural second control units performing feedback control on the motor with a limit value; a control switching unit selecting, based on a deviation between the limit value and a measured value, one of the first and the one or plural of second control units as control unit. The first control unit has a first calculation unit calculating a control value, based on a deviation between the command value and a measured value of the motor related to the command value. Each second control unit has a second calculation unit calculating a control value, based on a deviation between the limit value and a measured value of the motor related to the limit value. The first and second calculation units share terms of a calculation expression of the control value.
    Type: Application
    Filed: March 10, 2020
    Publication date: October 1, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventor: Kei SATO
  • Patent number: 10774002
    Abstract: A method for producing an oriented sintered body according to the present invention includes the steps of: (a) preparing a multilayer body, the multilayer body including a layer including a fine raw-material powder and a layer including a plate-like raw-material powder which are alternately stacked each other, particles of the plate-like raw-material powder being arranged such that surfaces of the particles of the plate-like raw-material powder extend along a surface of the layer including a fine raw-material powder; and (b) sintering the multilayer body.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: September 15, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Kei Sato, Takahiro Maeda, Morimichi Watanabe, Tsutomu Nanataki
  • Patent number: 10756449
    Abstract: Difficulty of manufacturing is reduced while ensuring waterproof property with respect to a contact portion with an aluminum core wire. A barrel portion of a crimp terminal includes an inner barrel piece and an outer barrel piece, and includes a seal member which is attached over a first region, a second region and a third region and which seals, after crimping, a space between the inner barrel piece and the outer barrel piece, an opening of the barrel portion on a terminal portion side, and a space between a covered portion and the barrel portion. An inner surface of the barrel portion is provided with a plurality of recesses arranged dispersedly, the recess having a circular shape in a plane view with respect to the inner surface.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: August 25, 2020
    Assignee: YAZAKI CORPORATION
    Inventors: Kei Sato, Kazuhide Takahashi
  • Publication number: 20200244196
    Abstract: A control device of a motor includes difference calculation circuitry that calculates a difference between a current rotation speed and a target rotation speed of the motor, coefficient correction circuitry that outputs corrected proportion coefficient and integration coefficient by multiplying each of an initially set proportion coefficient and integration coefficient by a correction coefficient, output voltage determination circuitry that calculates at least one of a proportional term in which the difference is multiplied by the corrected proportion coefficient and an integral term in which the difference is multiplied by the corrected integration coefficient and the result is integrated and determines one of the proportional term and the integral term or the sum of the two terms as a control value of the output voltage, and signal generation circuitry that generates a control signal on the basis of the control value.
    Type: Application
    Filed: August 24, 2018
    Publication date: July 30, 2020
    Inventor: Kei SATO
  • Patent number: 10717677
    Abstract: A method for producing a transparent alumina sintered body according to the present invention includes (a) a step of preparing an alumina raw material powder containing a plate-like alumina powder having an aspect ratio of 3 or more and a fine alumina powder having an average particle diameter smaller than that of the plate-like alumina powder so that, when a mixing ratio of the plate-like alumina powder to the fine alumina powder in terms of mass ratio is assumed to be T:(100?T), T is 0.001 or more and less than 1, and so that a mass ratio R1 of F relative to Al in the alumina raw material powder is less than 15 ppm; (b) a step of forming a raw material for forming containing the alumina raw material powder into a compact; and (c) a step of sintering the compact so as to obtain a transparent alumina sintered body.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: July 21, 2020
    Assignee: NGK Insultators, Ltd.
    Inventors: Morimichi Watanabe, Kiyoshi Matsushima, Kei Sato, Tsutomu Nanataki
  • Publication number: 20200216364
    Abstract: An oriented ceramic sintered body production method includes (a) a step of preparing a ceramic compact before firing into an oriented ceramic sintered body; and (b) a step of obtaining an oriented ceramic sintered body by sandwiching the ceramic compact between a pair of releasing sheets, placing the ceramic compact and the releasing sheets in a hot press firing furnace, and hot press firing the ceramic compact while applying a pressure by a pair of punches through the pair of releasing sheets, wherein each of the releasing sheets is a releasing sheet such that, after the releasing sheet is sandwiched between PET films, is then placed and vacuum-packed on a stainless steel sheet, and is isostatically pressed at 200 kg/cm2, a surface of the releasing sheet on the side opposite from the stainless steel sheet has a profile curve with a maximum profile height Pt of 0.8 ?m or less.
    Type: Application
    Filed: March 13, 2020
    Publication date: July 9, 2020
    Applicant: NGK INSULATORS, LTD.
    Inventors: Morimichi WATANABE, Kei SATO, Kiyoshi MATSUSHIMA, Takahiro MAEDA, Jun YOSHIKAWA, Tsutomu NANATAKI
  • Patent number: 10707373
    Abstract: There is provided a self-supporting polycrystalline gallium nitride substrate having excellent characteristics such as high luminous efficiency and high conversion efficiency when used for devices, such as light emitting devices and solar cells. The self-supporting polycrystalline gallium nitride substrate is composed of gallium nitride-based single crystal grains having a specific crystal orientation in a direction approximately normal to the substrate, and has a top surface and a bottom surface. The crystal orientations of individual gallium nitride-based single crystal grains as determined from inverse pole figure mapping by electron backscatter diffraction (EBSD) analysis on the top surface are distributed at various tilt angles from the specific crystal orientation, in which the average tilt angle thereof is 0.1° or more and less than 1° and the cross-sectional average diameter DT of the gallium nitride-based single crystal grains at the outermost surface exposed on the top surface is 10 ?m or more.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: July 7, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Morimichi Watanabe, Kei Sato, Yoshitaka Kuraoka, Katsuhiro Imai, Tsutomu Nanataki
  • Patent number: 10700447
    Abstract: A terminal metal fitting for attaching to an electric wire. The terminal metal fitting has: a barrel portion; and a contact portion. The barrel portion has: a base-side crimping portion to be swaged to a covering of the electric wire; and a tip-side crimping portion being spaced from the base portion and to be swaged to be electrically connected to a conductor core wire. The covering is extended inside a base-side opening portion of the tip-side crimping portion. The covering and the conductor core wire are to be fastened together at the base-side opening portion. The covering configured to isolate the conductor core wire located between the base-side crimping portion and the tip-side crimping portion from outside the terminal metal fitting.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: June 30, 2020
    Assignee: YAZAKI CORPORATION
    Inventor: Kei Sato
  • Patent number: 10694073
    Abstract: When a user authentication result is received via a network in response to an instruction for user authentication issued by a user who has operated any of a plurality of user interfaces, a user interface, of the plurality of user interfaces, which has been operated by the user is determined. If the received user authentication result indicates a success, an operation by the user via the determined user interface is permitted.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: June 23, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kei Sato
  • Patent number: 10658784
    Abstract: Difficulty of manufacturing is reduced while providing waterproof property with respect to a contact portion with an aluminum core wire. A barrel portion of a crimp terminal includes an inner barrel piece and an outer barrel piece, and an inner surface is provided with a plurality of recesses arranged dispersedly, and a groove extending in in a first region at the outer barrel piece, a second region at a location close to a terminal portion and a third region on an opposite side. A second portion of a seal member formed from adhesive gel is formed into a strip-like shape having width that allows a part thereof to be pushed out after crimping, and a first seal portion is formed into a shape corresponding to the groove and having narrower width than the second seal portion.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: May 19, 2020
    Assignee: YAZAKI CORPORATION
    Inventor: Kei Sato
  • Patent number: 10573978
    Abstract: Provided is a crimp terminal for alleviating manufacturing while maintaining waterproof property against a contact portion with an aluminum core wire. A barrel portion of a crimp terminal has an inner barrel piece and an outer barrel piece, and a seal member is provided for being stuck across a first region, a second region, and a third region, and after crimping for sealing a space between the inner barrel piece and the outer barrel piece, an opening of the barrel portion formed cylindrical on the terminal portion side, and a space between the covered portion and the barrel portion, and a plurality of recesses is dispersedly provided on an inner surface of the barrel portion so as to partly overlap with the seal member.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: February 25, 2020
    Assignee: YAZAKI CORPORATION
    Inventors: Kei Sato, Kazuhide Takahashi
  • Patent number: 10558781
    Abstract: A design support apparatus includes a storage that stores first layout data and pattern data, the first layout data indicating a circuit pattern of a design target circuit, the circuit pattern including circuit patterns, dummy patterns of the component circuits, and a wiring pattern, the component circuits being included in the design target circuit, the pattern data indicating a second dummy pattern, the second dummy pattern having a shape different from a shape of a first dummy pattern, the first dummy pattern being included in the first layout data, and a processor coupled to the storage, configured to specifies a component circuit, the specified component circuit being included in an area in the arrangement area, extracts pattern data indicating a dummy pattern, generates second layout data, the second layout data indicating a circuit pattern, and outputs the second layout data.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: February 11, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Kei Sato
  • Publication number: 20200044384
    Abstract: The present invention suppresses the return of the barrel section while ensuring waterproofness against the contact portion with the aluminum core wire. A plurality of concave sections is dispersedly provided on the inner surface of the barrel section. A groove section is provided so as to overlap the sealing member. A ridge portion is provided extending in the crossing direction at a position which does not overlap with the sealing member in plan view and is close to the third region on the side opposite to the terminal section. The barrel section is crimped to the end portion by crimping so that the exposed portion of the aluminum core wire is in contact with the ridge portion, and is sealed with the sealing member.
    Type: Application
    Filed: April 26, 2017
    Publication date: February 6, 2020
    Applicant: Yazaki Corporation
    Inventor: Kei SATO
  • Publication number: 20200028281
    Abstract: A terminal metal fitting (20) includes a barrel portion (41) and a contact portion (31). The barrel portion (41) has a plate body to be formed into a tubular shape by overlapping its one end and its other end each other. The plate body has: a base portion (46); a tip portion (45); and an intermediate portion (47) connecting the base portion (46) and the tip portion (45) and to cover a conductor core wire (11) located between the base portion (46) and the tip portion (45). The barrel portion (41) has, at the one end portion of at least the intermediate portion (47) among the plate body, a bent portion (47a) having a bent shape toward the conductor core wire (11) before crimping and to be in pressure contact with the conductor core wire (11) after the crimping.
    Type: Application
    Filed: June 20, 2019
    Publication date: January 23, 2020
    Applicant: YAZAKI CORPORATION
    Inventor: Kei SATO
  • Publication number: 20200018304
    Abstract: A controller of a motor control device increases a voltage to be applied to a coil based on a control signal calculated from an estimated rotation speed, when the estimated rotation speed becomes equal to or lower than a predetermined rotation speed, increases the voltage to be applied to the coil based on a control signal calculated from an actual rotation speed, in a case where the actual rotation speed is lower than the predetermined rotation speed when the estimated rotation speed becomes higher than the predetermined rotation speed, and decreases the voltage to be applied to the coil based on a control signal calculated from the actual rotation speed, in a case where the actual rotation speed is higher than the predetermined rotation speed when the estimated rotation speed becomes higher than the predetermined rotation speed.
    Type: Application
    Filed: September 25, 2017
    Publication date: January 16, 2020
    Inventors: Kei SATO, Yuichi HIBI, Yasuhiro SHIRAI
  • Publication number: 20200021074
    Abstract: A method of crimping a terminal with a cable which crimps and connects a crimping portion of a crimp terminal to an end of a cable by a crimp die, includes an anticorrosive supply step and a terminal crimping step. In the anticorrosive supply step, an anticorrosive agent is stored in or supplied to an anticorrosive supply portion formed in the crimp die. In the terminal crimping step, the crimping portion of the crimp terminal is crimped to the cable by the crimp die. During or after the terminal crimping step, the anticorrosive agent is applied to a predetermined area around the crimping portion of the crimp terminal by the anticorrosive supply portion of the crimp die.
    Type: Application
    Filed: July 10, 2019
    Publication date: January 16, 2020
    Applicant: Yazaki Corporation
    Inventors: Hideki SAITO, Kazuhide TAKAHASHI, Kei SATO
  • Publication number: 20200014128
    Abstract: A cable with a terminal includes a cable and a crimp terminal. In the cable, a core wire is covered with an insulating sheath. A crimp terminal has a core wire crimping portion and a sheath crimping portion. The core wire crimping portion is crimped to the core wire exposed from the insulating sheath. The sheath crimping portion is crimped to the insulating sheath. An anticorrosion tape material is stuck around the crimping portion of the crimp terminal.
    Type: Application
    Filed: July 2, 2019
    Publication date: January 9, 2020
    Applicant: Yazaki Corporation
    Inventors: Hideki SAITO, Kazuhide Takahashi, Kei Sato
  • Publication number: 20200014127
    Abstract: A terminal-equipped electrical wire includes an electrical wire and a terminal fitting that is attached to the electrical wire. In the electrical wire, the terminal fitting includes a barrel portion crimped to a conductor core wire exposed from the electrical wire, and a contact portion to be connected to a mating terminal. The barrel portion is a cylindrical plate-like body in which one end and the other end overlap with each other after crimping, and has a plate-like body including a proximal end portion covering a sheath of the electrical wire, a distal end portion covering the conductor core wire away from the proximal end portion, and an intermediate portion connecting the proximal end portion and the distal end portion and covering the conductor core wire so as to isolate it from the outside between the proximal end portion and the distal end portion.
    Type: Application
    Filed: June 7, 2019
    Publication date: January 9, 2020
    Inventor: Kei Sato