Patents by Inventor Hiroaki Kawai

Hiroaki Kawai 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).

  • Publication number: 20200301352
    Abstract: A cartridge includes a photosensitive drum, the movable member movable relative to the photosensitive drum to control an inclination angle of a drive transmission member. The movable member is movable between a first position for reducing an inclination angle of the drive transmission member relative to the photosensitive drum and a second position retracted from the first position. By this, driving connection can be smoothly carried out.
    Type: Application
    Filed: June 9, 2020
    Publication date: September 24, 2020
    Inventors: Naoki Matsumaru, Ryuta Murakami, Tadashi Horikawa, Akihiro Fujiwara, Akinobu Hirayama, Daisuke Makiguchi, Hiroaki Nosho, Takuro Kanno, Goshi Ozaki, Tachio Kawai, Daisuke Abe
  • Patent number: 10656121
    Abstract: Provided are a method and device for detecting arrangement disorder of fibers in a conductive composite material. A coil (7) is disposed at a position at which the coil (7) faces the conductive composite material, and thereby a current can be applied to the conductive composite material. Thus, work or the like for attaching electrodes to the conductive composite material is not required. As a result, the arrangement disorder of the fibers in the conductive composite material can easily be detected. A method for detecting meandering of fibers in a conductive composite material includes a step of disposing a magnetic field sensor (8) at a position at which the magnetic field sensor (8) faces a surface (Sa) of the conductive composite material such that a direction (D) of a magnetosensitive axis is horizontal with the surface (Sa) and is parallel to coil faces (7e).
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: May 19, 2020
    Assignee: IHI Corporation
    Inventors: Akinori Tsuda, Hiroki Kawai, Hiroaki Hatanaka, Yuichi Yamaguchi, Koichi Inagaki
  • Patent number: 10610834
    Abstract: An asymmetric membrane including a crosslinked polyimide resin, the crosslinked polyimide resin being formed by crosslinking a polyimide resin by a crosslinking agent; the polyimide resin including a structural unit (A) derived from tetracarboxylic dianhydride and a structural unit (B) derived from diamine; the structural unit (A) including a structural unit (A-1) derived from a compound represented by Formula (a-1); the structural unit (B) including a structural unit (B-1) derived from Formula (b-1), and a proportion of the structural unit (B-1) per 100 mol % of the structural unit (B) being from 0.1 to 50 mol %; and the crosslinking agent being a compound having not less than two functional groups that bond with carboxy groups. In Formula (b-1), Q1 and Q2 are each independently a group including an aromatic group, an aliphatic hydrocarbon group, and/or an alicyclic hydrocarbon group; X is a single bond or a particular group.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: April 7, 2020
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Ryuichiro Kawai, Takashi Yamamoto, Daisuke Ohno, Yohei Abiko, Hiroaki Oka, Shuya Suenaga, Takafumi Takada, Tomohiro Hariu
  • Patent number: 10605777
    Abstract: Provided is a method for inspecting an electroconductive composite material including disposing a detection magnetic field measurement unit, disposing a correction magnetic field measurement unit, applying a current, acquiring a detection magnetic field strength, acquiring a correction magnetic field strength, and detecting a portion in which arrangement of carbon fibers is disordered. The operation includes calculating a correction coefficient using the correction magnetic field strength and correcting the detection magnetic field strength using the correction coefficient.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: March 31, 2020
    Assignee: IHI Corporation
    Inventors: Hiroki Kawai, Akinori Tsuda, Hiroaki Hatanaka, Yuichi Yamaguchi, Koichi Inagaki
  • Patent number: 10522275
    Abstract: A method for producing a nanoheterostructured permanent magnet includes a first step of preparing a raw material solution by dissolving, in a solvent, (1) a block copolymer comprising polymer block components that are immiscible but linked to each other, (2) a first inorganic precursor which is one of a hard magnetic material precursor and a soft magnetic material precursor, and (3) a second inorganic precursor which is the other of the hard magnetic material precursor and the soft magnetic material precursor, and a second step including a phase-separation treatment for forming a nanophase-separated, a conversion treatment for converting the hard magnetic material precursor and the soft magnetic material precursor to a hard magnetic material and a soft magnetic material, respectively, and a removal treatment for removing the block copolymer from the nanophase-separated structure.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: December 31, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hiroaki Wakayama, Hirotaka Yonekura, Yasuaki Kawai
  • Publication number: 20190381463
    Abstract: An asymmetric membrane including a crosslinked polyimide resin, the crosslinked polyimide resin being formed by crosslinking a polyimide resin by a crosslinking agent; the polyimide resin including a structural unit (A) derived from tetracarboxylic dianhydride and a structural unit (B) derived from diamine; the structural unit (A) including a structural unit (A-1) derived from a compound represented by Formula (a-1); the structural unit (B) including a structural unit (B-1) derived from Formula (b-1), and a proportion of the structural unit (B-1) per 100 mol % of the structural unit (B) being from 0.1 to 50 mol %; and the crosslinking agent being a compound having not less than two functional groups that bond with carboxy groups. In Formula (b-1), Q1 and Q2 are each independently a group including an aromatic group, an aliphatic hydrocarbon group, and/or an alicyclic hydrocarbon group; X is a single bond or a particular group.
    Type: Application
    Filed: January 30, 2019
    Publication date: December 19, 2019
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Ryuichiro KAWAI, Takashi YAMAMOTO, Daisuke OHNO, Yohei ABIKO, Hiroaki OKA, Shuya SUENAGA, Takafumi TAKADA, Tomohiro HARIU
  • Publication number: 20190326843
    Abstract: A motor driving apparatus includes a first driving control circuit (an MCU, a driving circuit, an input circuit, a power management IC) and a second driving control circuit (an MCU, a driving circuit, an input circuit, a power management IC). The first driving control circuit and the second driving control circuit are configured to drive a corresponding winding group of winding groups of a motor, and have a master mode for outputting a synchronous trigger signal in synchronization with driving of the corresponding winding group and a slave mode for synchronizing the driving of the corresponding winding group with an input synchronous trigger signal. When an error has occurred in an operation of the first driving control circuit in the master mode, the second driving control circuit switches an operation mode of the second driving control circuit from the slave mode to the master mode.
    Type: Application
    Filed: April 4, 2019
    Publication date: October 24, 2019
    Inventors: Hiroaki KAWAI, Shunsuke NAKANO
  • Publication number: 20190300339
    Abstract: An output-torque estimation unit obtains a value of a current input to a motor, from a power converter, and calculates an estimated output torque value which is an estimated value of output torque of the motor, from the obtained value of the current. A load estimation unit estimates a load value of a hanging cargo based on the estimated output torque value which is calculated by the output-torque estimation unit, a speed reduction ratio of a speed reducer, an effective radius of a winch drum, and the winding number which is set by the number setting unit.
    Type: Application
    Filed: June 5, 2017
    Publication date: October 3, 2019
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroaki KAWAI, Takashi HIEKATA, Koji INOUE, Takashi TOKUYAMA, Hiroshi HASHIMOTO, Toshiaki SHIMODA, Shintaroh SASAI, Tetsuya OGAWA, Toshiro YAMASHITA
  • Patent number: 10399828
    Abstract: An electrically driven winch device includes a winch drum, a plurality of axial-gap electric motors, and a drive shaft. The winch drum rotates around a drum axis in order to wind or unwind a work rope. The plurality of electric motors are electric motors configured to drive the winch drum to rotate, and are each provided with a stator, and rotors which rotate around a rotation axis and are disposed at an axial distance from the stator. The drive shaft is disposed coaxially with the drum axis and serially connects the rotors of the plurality of electric motors on the rotation axis.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: September 3, 2019
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Hiekata, Koji Inoue, Hiroaki Kawai, Shintaroh Sasai, Tetsuya Ogawa, Toshiro Yamashita
  • Patent number: 10399553
    Abstract: An operating switch for commanding actuation of an electric parking brake mechanism includes two input terminals and two output terminals, a pair of two wirings for each input-terminal/output-terminal pair of the two input terminals and the two output terminals, each of the wirings being located between the input terminals and the two output terminals, a first switch element provided for the input terminals or the output terminals, and configured to switch connections to the two wirings, according to a command for the actuation, and a second switch element connected to one wiring of the two wirings that connects the input terminals and the output terminals when the command for the actuation given to the first switch element is set to a mode of non-operation. The second switch element is configured to switch connections to the two output terminals or the two input terminals, according to the command for the actuation.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: September 3, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroaki Kawai, Kenichiro Matsubara
  • Patent number: 10381890
    Abstract: An axial gap type dynamo-electric machine (1) comprises: a stator (2) provided with a magnetic core (21) and an exciting coil (22); a rotor (3) provided with a plurality of permanent magnets (4) circumferentially arranged around a rotation center axis (AX), the rotor (3) being also provided with a disk-shaped base material (31) for supporting the permanent magnets, the rotor (3) being disposed at an axial distance from the stator (2); and affixation members (5) for affixing the permanent magnets (4) to the base material (31). The permanent magnets (4) are provided with front surfaces facing the stator (2), rear surfaces facing the base material, and engagement-receiving sections (412, 422, 432) formed at peripheral edges of the permanent magnets (4). The affixation members (5) include: engagement sections (512) engaging the engagement-receiving sections; and affixation sections (511) forming mechanical affixation structures relative to the base material.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: August 13, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Inoue, Takashi Hiekata, Hiroaki Kawai, Shintaro Sasai, Tetsuya Ogawa, Toshiro Yamashita, Shingo Kasai, Shumpei Hayashi
  • Patent number: 10355570
    Abstract: In the outer rotor-type axial gap brushless motor of the present invention, each of a plurality of coils provided to a stator is constituted by winding a band-shaped conductor member via an insulating member such that the width direction of the conductor member runs along the axial direction of the coil, and each coil has a through passage which penetrates in the axial direction of the coil and which is included between prescribed turns in a portion of the coil that corresponds to the outer side in the radial direction of the stator relative to a core portion of the coil.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: July 16, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Kenichi Inoue, Hiroaki Kawai, Koji Inoue, Takashi Hiekata, Kazuhide Sekiyama
  • Patent number: 10315896
    Abstract: An electric winch device includes a required braking force estimation section which estimates a required braking force required to stop a free-falling object at a position at an allowable stopping height; a braking force determination section which determines, out of an operational braking force, each of a first braking force to be borne by a braking device and a second braking force to be borne by a braking force which is generated in an electric motor due to consumption of regenerative power; and a control section which causes the braking device to apply the first braking force to a winch drum. The braking force determination section determines the first braking force to be a braking force equal to or greater than the required braking force when, at a time of stopping of the free-falling object, the operational braking force is equal to or greater than the required braking force.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: June 11, 2019
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroaki Kawai, Takashi Hiekata, Shintaro Sasai, Naoto Hori, Toshiro Yamashita, Koichi Shimomura
  • Publication number: 20190157949
    Abstract: To effectively cover a coil end with a resin layer. A method for manufacturing a stator includes a first resin layer forming step (ii) of forming a first thermoset resin layer by impregnating the tip end side of a coil end with first thermoset resin, the coil end protruding from the core of the stator, the first thermoset resin having liquidity; a second resin layer forming step (iii) of forming a second thermoset resin layer on the first thermoset resin layer by dropping second thermoset resin from the core side of the coil end toward the tip end side; and a curing step of curing the first thermoset resin and the second thermoset resin.
    Type: Application
    Filed: November 15, 2018
    Publication date: May 23, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Masashi KAWAI, Yasushi NISHIKUMA, Hiroaki TAKEDA
  • Patent number: 10287137
    Abstract: Disclosed is a winch control apparatus for a crane, which comprises: a first compensation torque value calculation section which calculates, when a hoisting manipulation being input, based on a difference speed between a detected rotational speed and a target speed according to a manipulation amount of the hoisting manipulation, a first compensation torque value for enabling an electric motor to generate a reverse-rotation-preventing torque which is a torque in a hoisting direction and corresponding to the difference speed; and a second compensation torque value calculation section which calculates, when the hoisting manipulation being input, based on a detected load value, a second compensation torque value for enabling the electric motor to generate a load bearing torque which is a torque in the hoisting direction and necessary for bearing a load of the load value.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: May 14, 2019
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroaki Kawai, Takashi Tokuyama, Toshiaki Shimoda, Koji Inoue, Tetsuya Ogawa, Shintaroh Sasai
  • Patent number: 10264359
    Abstract: In a speaker damper, art sections are disposed on warp reference lines and warp reference lines. Straight sections are disposed so as to intersect intermediate reference lines at right angles. By adopting this configuration, wave parts can be adjusted so that they are less likely to expand/contract on the warp reference lines and the warp reference lines in comparison with related-art concentric circular wave parts. Further, the wave parts can be adjusted so that they are more likely to expand/contract on the intermediate reference lines. In this way, the speaker damper can perform uniform vibrating motions throughout the entire speaker damper with a simple configuration.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: April 16, 2019
    Assignee: JVC KENWOOD CORPORATION
    Inventors: Hiroaki Kawai, Akira Shigeta, Satoshi Tomizawa
  • Patent number: 10196247
    Abstract: Provided is an electric winch device including: an electric motor; a winch drum; a brake; an operation lever; and a controller. The controller includes: a first torque derivation unit which derives a value of a first torque applied to the winch drum due to a load of an object; a second torque derivation unit which derives a value of a second torque generated in the winch drum by a drive torque of the electric motor; and a brake control unit which determines a timing for releasing a braking action on the winch drum after the operation lever has been operated, on the basis of a differential between the second torque value and the first torque value, and which causes the brake to release the braking action on the winch drum by transmitting, to the brake, a control signal instructing release of the braking action on the winch drum at the determined timing.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: February 5, 2019
    Assignees: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Hiekata, Hiroaki Kawai, Toshiro Yamashita, Shintaro Sasai, Naoto Hori, Koichi Shimomura
  • Patent number: 10189687
    Abstract: An electric winch device causes an operative part to perform an operation for hoisting work by winding up or letting out a rope connected to the operative part, the electric winch device including: a winch drum having an axis, provided on the mobile crane to be rotatable about the axis and wound with the rope therearound; a plurality of motors located on one side of the winch drum in an axial direction in which the axis of the winch drum extends, and arranged side by side in a direction perpendicular to the axial direction; a gear mechanism which combines torques output from the plurality of motors; and a transmitting part which transmits a resultant of torques combined by the gear mechanism to the winch drum to rotate the winch drum to thereby cause the winch drum to wind up or let out the rope.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: January 29, 2019
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Hiekata, Hiroaki Kawai, Koji Inoue, Shintaro Sasai, Tetsuya Ogawa, Toshiro Yamashita
  • Patent number: 10150655
    Abstract: An electric winch device including an electric motor that rotates a winch drum in a hoisting direction, and generates regenerative electric power when a rotation of the winch drum in a lowering direction is transmitted to the electric motor, a transmission device that transmits the rotation between the electric motor and the winch drum, a power calculating section that calculates power of the target object by freefall, and a control section that controls an operation of the transmission device. When the power calculated by the power calculating section exceeds reference electric power, the control section causes the transmission device to change the transmission rate of the rotation to a transmission rate at which the regenerative electric power generated by the electric motor is equal to or smaller than the reference electric power.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: December 11, 2018
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Hiekata, Hiroaki Kawai, Toshiro Yamashita, Shintaro Sasai, Naoto Hori, Koichi Shimomura
  • Publication number: 20180319635
    Abstract: An electrically driven winch device includes a winch drum, a plurality of axial-gap electric motors, and a drive shaft. The winch drum rotates around a drum axis in order to wind or unwind a work rope. The plurality of electric motors are electric motors configured to drive the winch drum to rotate, and are each provided with a stator, and rotors which rotate around a rotation axis and are disposed at an axial distance from the stator. The drive shaft is disposed coaxially with the drum axis and serially connects the rotors of the plurality of electric motors on the rotation axis.
    Type: Application
    Filed: October 7, 2016
    Publication date: November 8, 2018
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi HIEKATA, Koji INOUE, Hiroaki KAWAI, Shintaroh SASAI, Tetsuya OGAWA, Toshiro YAMASHITA