Patents by Inventor Akira Naito

Akira Naito 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: 11104320
    Abstract: Provided is a brake bleeding device for bleeding air accumulated in brake fluid inside a braking device provided in a vehicle. The brake bleeding device includes: a master cylinder constituting a part of the braking device and provided inside a front-side storage chamber, the master cylinder being configured to generate brake hydraulic pressure in accordance with a stroke of an input piston; a brake pedal unit provided inside the front-side storage chamber and configured to give pressing force in a stroke direction to the input piston when a link mechanism connected to the input piston via a rod is operated; and an operating lever attached to the link mechanism in a state where the link mechanism is operable by the operating lever. The operating lever extends downward to a position where the operating lever is accessible from outside the front-side storage chamber.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: August 31, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ikuru Konno, Takenori Kubo, Keiichi Naito, Kazuki Uesugi, Akira Takioka, Itsuki Miyachi, Yuji Saito, Taisei Matsubara
  • Patent number: 11107892
    Abstract: A method for producing a SiC epitaxial wafer according to the present embodiment includes: an epitaxial growth step of growing the epitaxial layer on the SiC single crystal substrate by feeding an Si-based raw material gas, a C-based raw material gas, and a gas including a Cl element to a surface of a SiC single crystal substrate, in which the epitaxial growth step is performed under growth conditions that a film deposition pressure is 30 torr or less, a Cl/Si ratio is in a range of 8 to 12, a C/Si ratio is in a range of 0.8 to 1.2, and a growth rate is 50 ?m/h or more from an initial growth stage.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: August 31, 2021
    Assignees: SHOWA DENKO K.K., Central Research Institute Of Electric Power Industry, DENSO CORPORATION
    Inventors: Keisuke Fukada, Naoto Ishibashi, Akira Bando, Masahiko Ito, Isaho Kamata, Hidekazu Tsuchida, Kazukuni Hara, Masami Naito, Hideyuki Uehigashi, Hiroaki Fujibayashi, Hirofumi Aoki, Toshikazu Sugiura, Katsumi Suzuki
  • Publication number: 20210098756
    Abstract: A battery pack (2; 602) includes: an outer case (12; 612); one or more battery cells (90a-90j); and a cell case (80), which is housed in the outer case (12; 612) and houses the battery cell(s) (90a-90j). The outer case (12; 612) has: an upper surface (wall) (14b), in which a terminal-opening part (22a) for exposing a terminal (102) is provided; a bottom wall (15e); and a plurality of side surfaces (walls) (15a-15d) extending upward from the bottom wall (15e). The battery cell(s) (90a-90j) is (are) disposed parallel to the bottom wall (15e). An opening (40a-40j) is provided in a specific side surface (15b, 15d), from among the plurality of side surfaces (15a-15d), that faces an end surface of the battery cell(s) (90a-90j) in a longitudinal direction.
    Type: Application
    Filed: September 29, 2020
    Publication date: April 1, 2021
    Inventors: Akira NAITO, Tatsuya NAGAHAMA
  • Publication number: 20210057968
    Abstract: An electric work machine includes a brushless motor including a stator including a stator core, an electrical insulator located on the stator core, and at least one coil wound around the stator core with the electrical insulator in between, and a rotor rotatable with respect to the stator, and an output unit drivable by the brushless motor. The stator core has a through-hole and/or a recess to lock rotation of the stator with a screw.
    Type: Application
    Filed: November 5, 2020
    Publication date: February 25, 2021
    Applicant: MAKITA CORPORATION
    Inventors: Kei KOUDA, Akira NAITO, Hideki ABE
  • Patent number: 10913141
    Abstract: An impact tool includes a motor, a driving mechanism, and a vibration sensor. The driving mechanism is configured to perform a hammering operation of linearly driving a tool accessory along an impact-axis by power of the motor. The impact-axis extends in a front-rear direction of the impact tool. The vibration sensor is configured to detect vibrations. The vibration sensor is disposed such that the vibration sensor is capable of detecting vibrations of a first frequency among vibrations caused in the impact tool, and such that transmission of vibrations of a second frequency to the vibration sensor is suppressed. The vibrations of the first frequency result from the hammering operation. The second frequency is different from the first frequency.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: February 9, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Hitoshi Iida, Masanori Furusawa, Hirokatsu Yamamoto, Ryo Umemoto, Yoshinori Sasaki, Akira Naito
  • Patent number: 10862376
    Abstract: An electric work machine includes a brushless motor including a stator including a stator core, an electrical insulator located on the stator core, and at least one coil wound around the stator core with the electrical insulator in between, and a rotor rotatable with respect to the stator, and an output unit drivable by the brushless motor. The stator core has a through-hole and/or a recess to lock rotation of the stator with a screw.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: December 8, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Kei Kouda, Akira Naito, Hideki Abe
  • Patent number: 10707455
    Abstract: A battery pack disclosed in the present description includes an outer case including a display portion and an opening portion, wherein the display portion includes one or more display windows; a battery cell housed in the outer case; a substrate housed in the outer case, wherein one or more light emitting elements corresponding to the one or more display windows are mounted on the substrate; and a light shielding wall housed in the outer case, wherein the light shielding wall is arranged to block the opening portion and the one or more light emitting elements from each other.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: July 7, 2020
    Assignees: MAKITA CORPORATION, TOHOKU MURATA MANUFACTURING CO., LTD.
    Inventors: Hironori Ogura, Akira Naito, Akinori Terui
  • Publication number: 20200204027
    Abstract: An electric work machine includes a motor in which a wire is wound around each tooth of a stator in an aligned manner. The electric work machine includes a motor including a rotor and a stator. The stator includes a stator core having a first end face and a second end face, and having teeth protruding inwardly, a first insulator covering the first end face, a second insulator covering the second end face, a rib located on at least one of the first insulator or the second insulator, and overlapping the teeth in an axial direction of the teeth, and coils including a wire wound around the teeth via the first insulator and the second insulator and the rib.
    Type: Application
    Filed: November 13, 2019
    Publication date: June 25, 2020
    Applicant: MAKITA CORPORATION
    Inventor: Akira NAITO
  • Publication number: 20200195076
    Abstract: A stator (25; 25A) includes an insulator (28, 29) held on a stator core (27), coils (30) wound around the insulator and on the stator core, fusing terminals (50) held by the insulator and connected to the coils, and a short-circuiting member (32) having first, second and third sheet-metal members (68A-68C) that are respectively connectable to the fusing terminals by virtue of the short-circuiting member being detachably attached to the insulator by screws (75, 76).
    Type: Application
    Filed: November 19, 2019
    Publication date: June 18, 2020
    Inventor: Akira Naito
  • Publication number: 20200052558
    Abstract: An electric work machine includes a brushless motor including a stator including a stator core, an electrical insulator located on the stator core, and at least one coil wound around the stator core with the electrical insulator in between, and a rotor rotatable with respect to the stator, and an output unit drivable by the brushless motor. The stator core has a through-hole and/or a recess to lock rotation of the stator with a screw.
    Type: Application
    Filed: July 2, 2019
    Publication date: February 13, 2020
    Applicant: MAKITA CORPORATION
    Inventors: Kei KOUDA, Akira NAITO, Hideki ABE
  • Patent number: 10476284
    Abstract: A battery system for a power tool includes two or more battery packs (12), at least one battery holder (14) adapted to detachably engage two or more of the battery packs and a charger (16, 216, 316, 416) adapted to detachably engage the battery holder and to simultaneously electrically communicate with two or more of the battery packs while the at least one battery holder engages both the charger and the battery packs.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: November 12, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Hitoshi Suzuki, Kosuke Ito, Akira Naito
  • Patent number: 10249918
    Abstract: A battery pack includes a case, a battery device, an intervening member and a temperature detection device. The battery device may be disposed within the case and include a cell holder configured to accommodate a plurality of battery cells. The intervening member may be provided between the cell holder and at least one of the plurality of cell holder. The temperature detection device may be disposed between the intervening member and at least one of the plurality of cell holder, so that the temperature detection device directly contacts at least one of the battery cells for detecting a temperature thereof. At least one of the cell holder and the intervening member may have an elasticity, so that the temperature detection device may be directly pressed against at least one of the battery cells due to an elastic deformation of the least one of the cell holder and the intervening member.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: April 2, 2019
    Assignee: MAKITA CORPORATION
    Inventor: Akira Naito
  • Publication number: 20180297186
    Abstract: An impact tool includes a motor, a driving mechanism, and a vibration sensor. The driving mechanism is configured to perform a hammering operation of linearly driving a tool accessory along an impact-axis by power of the motor. The impact-axis extends in a front-rear direction of the impact tool. The vibration sensor is configured to detect vibrations. The vibration sensor is disposed such that the vibration sensor is capable of detecting vibrations of a first frequency among vibrations caused in the impact tool, and such that transmission of vibrations of a second frequency to the vibration sensor is suppressed. The vibrations of the first frequency result from the hammering operation. The second frequency is different from the first frequency.
    Type: Application
    Filed: April 5, 2018
    Publication date: October 18, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Hitoshi IIDA, Masanori FURUSAWA, Hirokatsu YAMAMOTO, Ryo UMEMOTO, Yoshinori SASAKI, Akira NAITO
  • Patent number: 10096814
    Abstract: The present description discloses a battery pack capable of being detachably attached to an apparatus including an apparatus terminal having a flat plate-like shape by sliding the battery pack in a sliding direction along the apparatus terminal. The battery pack includes a battery terminal capable of engaging with the apparatus terminal so as to be electrically connected therewith. The battery terminal includes a pair of elastic clamping pieces configured to receive the apparatus terminal when the battery pack is attached to the apparatus and to clamp the apparatus terminal from both sides of the apparatus terminal. In the battery pack, the pair of the elastic clamping pieces extends in a direction perpendicular to the sliding direction.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: October 9, 2018
    Assignee: MAKITA CORPORATION
    Inventor: Akira Naito
  • Publication number: 20180130980
    Abstract: A battery pack disclosed in the present description includes an outer case including a display portion and an opening portion, wherein the display portion includes one or more display windows; a battery cell housed in the outer case; a substrate housed in the outer case, wherein one or more light emitting elements corresponding to the one or more display windows are mounted on the substrate; and a light shielding wall housed in the outer case, wherein the light shielding wall is arranged to block the opening portion and the one or more light emitting elements from each other.
    Type: Application
    Filed: January 4, 2016
    Publication date: May 10, 2018
    Applicants: MAKITA CORPORATION, SONY CORPORATION
    Inventors: Hironori OGURA, Akira NAITO, Akinori TERUI
  • Patent number: 9866046
    Abstract: A charger charges a rechargeable battery pack of a cordless power tool. The charger includes at least one wall that at least partially defines a battery pack receiving space for the battery pack, a first guide extending away from the at least one wall, and a second guide extending away from the at least one wall and spaced from the first guide. The at least one wall, the first guide and the second guide are configured to guide the battery pack to a prescribed position relative to the at least one wall. The first guide and the second guide each include a portion inclined relative to the insertion direction by an angle of inclination such that the distance between the inclined portion of the first guide and the inclined portion of the second guide decreases in the insertion direction.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: January 9, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Kosuke Ito, Hitoshi Suzuki, Akira Naito
  • Patent number: 9695903
    Abstract: To provide a novel damper for a compressor that includes a vibration isolation system that suits the low rotation speed of a compressor of a cooling apparatus. A plurality of support projections that support annular mounting portions of a compressor at multiple points are provided at an upper end portion of a cylindrical support. The plurality of support projections elastically support the compressor so that the compressor has a high center of gravity and allow the compressor to be laterally displaced by vibration. Moreover, a bellows portion that is elastically deformed while being in contact with the annular mounting portion that becomes laterally displaced is provided. The elastic deformation of the bellows portion buffers the lateral displacement of the compressor and stirs a viscous fluid that fills inside thereof to buffer the vibration.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: July 4, 2017
    Assignees: Panasonic Corporation, Polymatech Japan Co., Ltd.
    Inventors: Tsuyoki Hirai, Akira Naito
  • Patent number: 9634503
    Abstract: In one aspect according to the present teachings, a battery charger may include a body housing and a power supply connector disposed at a lateral side of the body housing. The power supply connector can supply a DC power to an external device.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: April 25, 2017
    Assignee: MAKITA CORPORATION
    Inventors: Hideyuki Taga, Yasuhiro Tabuchi, Mamoru Sakai, Akira Naito
  • Patent number: 9614203
    Abstract: A contact diameter, which is formed by a cell holding portion and receiving-partitioning portions, is configured to be smaller than the diameter of a columnar outer peripheral surface of a battery cell. The cell holding portion comes into contact with the columnar outer peripheral surface of the battery cell so as to hold the columnar outer peripheral surface. The contact diameter formed by the cell holding portion and the receiving-partitioning portions increases when the battery cell is held, and the battery cell is pressed when the battery cell is held. A cell holder is provided with the receiving-partitioning portions that guide the battery cells to be inserted and housed.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: April 4, 2017
    Assignee: MAKITA CORPORATION
    Inventor: Akira Naito
  • Patent number: 9601729
    Abstract: A power-tool battery pack usable as a power supply of a power tool and capable of slidably attaching to and detaching from a tool main body of the power tool includes a battery main body and a case that houses the battery main body. The battery main body includes a female terminal having inner sides configured to electrically connect to and sandwich a male terminal slidably attachable to the battery pack. The case includes a case main body and a case-cover part. The case-cover part has an opening for receiving the male terminal and sandwiching-wall parts for sandwiching the female terminal from outer sides of the female terminal. The female terminal and the sandwiching-wall parts are configured such that, at least when the female terminal sandwiches the male terminal, parts of the female terminal facing the sandwiching-wall parts are caused to touch the sandwiching-wall parts.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: March 21, 2017
    Assignee: MAKITA CORPORATION
    Inventor: Akira Naito