Patents by Inventor Hidenori Nagasaka

Hidenori Nagasaka 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: 10906163
    Abstract: A power tool includes a tool-main-body part, an electric motor as a drive source, a grip part, which extends downward from the tool-main-body part and is configured to be gripped by a user, and a power-supply unit at a tip of the grip part. The power tool includes a controller configured to control the operation of the electric motor, the controller being located on the power-supply unit, and a display controlled by the controller and configured to indicate an operating state of the electric motor. The controller and the display each have a flat-plate shape and are disposed along a surface direction with respect to one another, and the display includes a first portion that overlies the controller and a second portion that projects beyond an end edge of the controller.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: February 2, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Hidenori Nagasaka, Ryunosuke Kumagai, Koji Tsukamoto, Tomonori Kawase, Kosuke Ito, Tokuo Hirabayashi, Yasuhito Kawai
  • Publication number: 20210028634
    Abstract: A pair of right and left fixing holes and a pair of strap attachment holes are provided on a rear surface of a main body housing at a position which does not protrude from a side area S in a planar view. A bottom edge portion of an upper recessed portion is provided above the fixing hole to cover each of the right and left fixing holes, the strap attachment holes are provided to be coaxial with the bottom edge portion, and it is ensured that durability and compactness of the charger are obtained.
    Type: Application
    Filed: October 7, 2020
    Publication date: January 28, 2021
    Applicant: MAKITA CORPORATION
    Inventors: Hideyuki TAGA, Yasuhiro TABUCHI, Hidenori NAGASAKA, Kiyozumi KOKAWA, Shinsuke OKUDA
  • Patent number: 10840717
    Abstract: A pair of right and left fixing holes and a pair of strap attachment holes are provided on a rear surface of a main body housing at a position which does not protrude from a side area S in a planar view. A bottom edge portion of an upper recessed portion is provided above the fixing hole to cover each of the right and left fixing holes, the strap attachment holes are provided to be coaxial with the bottom edge portion, and it is ensured that durability and compactness of the charger are obtained.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: November 17, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Hideyuki Taga, Yasuhiro Tabuchi, Hidenori Nagasaka, Kiyozumi Kokawa, Shinsuke Okuda
  • Patent number: 10751809
    Abstract: An electrical apparatus comprises an extension portion extending in a direction that intersects the direction in which a battery attachment surface of a battery base extends. A battery includes a plurality of battery cells with negative electrode side end faces. The battery has negative electrode side holding portions adjacent to the exterior of each of the negative electrode side end faces. The negative electrode side holding portions are located closer to the inner region of the center of gravity of the apparatus than a virtual plane to which a lateral rear side of the extension portion and a lateral rear side of the battery are tangent.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: August 25, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Hidenori Nagasaka, Tomohiko Imae
  • Publication number: 20200262036
    Abstract: A power tool, such as a hammer driver-drill (1), includes a spindle (26) that is axially and rotatable supported inside a metal gear case (41). A first cam (83) is affixed to the spindle so as to rotate therewith and is housed in the gear case (41). A second cam (84) is disposed around spindle such that it is rotatable separately with respect to the spindle and can be brought into contact with the first cam. Hammer-switching levers (95) are movable relative to the gear case between an advanced position, at which rotation of the second cam is restricted (blocked), and a retracted position, at which the rotational restriction on the second cam is released. Receiving members (89) are respectively interposed between the gear case and the hammer-switching levers and are configured to absorb vibration generated when a hammering operation is being performed using the power tool.
    Type: Application
    Filed: February 18, 2020
    Publication date: August 20, 2020
    Inventors: Yuta ARAKI, Hidenori NAGASAKA, Manabu SUGIMOTO
  • Patent number: 10720863
    Abstract: An electric power tool may include a three-phase brushless motor configured to drive a tool, a gear reducer provided between the motor and the tool. The gear reducer is configured to selectively change a reduction ratio from the motor to the tool between a first reduction ratio and a second reduction ratio. The electric power tool may further include a motor controller configured to drive the motor with rectangular waves. The motor controller is configured to selectively change a conduction angle of each rectangular wave between at least a first conduction angle and a second conduction angle.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: July 21, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Itsuku Kato, Katsuna Hayashi, Kouichi Takeda, Hidenori Nagasaka, Takeshi Kamiya
  • Publication number: 20200139459
    Abstract: A rechargeable shear (1) includes: a motor (5) having a rotor (21) that is rotatable relative to a stator (20); a motor housing (4), which houses the motor (5); a grip housing (8) connected to the motor housing (4); a battery-holding housing (9) connected to the grip housing (8); and a shear part (3) disposed forward of the rotor 21 and operably driven by the rotor (21). The motor (5) may be brushless. The shear part (3) may be rotatable relative to the motor housing (4) using a manipulatable ring (85) and a detent system (89, 92-94). A light (48) for illuminating the shear part (3) and a workpiece being cut thereby may be provided on the grip housing (8) or the battery-holding housing (9).
    Type: Application
    Filed: October 2, 2019
    Publication date: May 7, 2020
    Inventors: Hidenori NAGASAKA, Shogo TOMINAGA
  • Patent number: 10589412
    Abstract: A rechargeable electric power tool includes a motor that includes a rotation shaft, a motor housing that houses the motor, a gear housing disposed ahead of the motor, a final output shaft that is held onto the gear housing and perpendicular to the rotation shaft, and a loop-shaped handle housing disposed at a rear of the motor housing, and a battery mounting portion configured to hold two battery packs is disposed at a rear portion of the handle housing.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: March 17, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Hidenori Nagasaka, Tomohiko Imae
  • Publication number: 20200047319
    Abstract: A power tool includes a tool-main-body part, an electric motor as a drive source, a grip part, which extends downward from the tool-main-body part and is configured to be gripped by a user, and a power-supply unit at a tip of the grip part. The power tool includes a controller configured to control the operation of the electric motor, the controller being located on the power-supply unit, and a display controlled by the controller and configured to indicate an operating state of the electric motor. The controller and the display each have a flat-plate shape and are disposed along a surface direction with respect to one another, and the display includes a first portion that overlies the controller and a second portion that projects beyond an end edge of the controller.
    Type: Application
    Filed: October 16, 2019
    Publication date: February 13, 2020
    Inventors: Hidenori NAGASAKA, Ryunosuke KUMAGAI, Koji TSUKAMOTO, Tomonori KAWASE, Kosuke ITO, Tokuo HIRABAYASHI, Yasuhito KAWAI
  • Patent number: 10478950
    Abstract: A power tool includes a tool-main-body part, an electric motor as a drive source, a grip part, which extends downward from the tool-main-body part and is configured to be gripped by a user, and a power-supply unit at a tip of the grip part. The power tool includes a controller configured to control the operation of the electric motor, the controller being located on the power-supply unit, and a display controlled by the controller and configured to indicate an operating state of the electric motor. The controller and the display each have a flat-plate shape and are disposed along a surface direction with respect to one another, and the display includes a first portion that overlies the controller and a second portion that projects beyond an end edge of the controller.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: November 19, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Hidenori Nagasaka, Ryunosuke Kumagai, Koji Tsukamoto, Tomonori Kawase, Kosuke Ito, Tokuo Hirabayashi, Yasuhito Kawai
  • Publication number: 20190319563
    Abstract: An electric power tool may include a three-phase brushless motor configured to drive a tool, a gear reducer provided between the motor and the tool. The gear reducer is configured to selectively change a reduction ratio from the motor to the tool between a first reduction ratio and a second reduction ratio. The electric power tool may further include a motor controller configured to drive the motor with rectangular waves. The motor controller is configured to selectively change a conduction angle of each rectangular wave between at least a first conduction angle and a second conduction angle.
    Type: Application
    Filed: April 10, 2019
    Publication date: October 17, 2019
    Inventors: Itsuku KATO, Katsuna HAYASHI, Kouichi TAKEDA, Hidenori NAGASAKA, Takeshi KAMIYA
  • Publication number: 20190143491
    Abstract: An impact driver or impact tool includes a motor, a motor housing that houses the motor, a grip housing integrally provided with the motor housing, a hammer case is disposed frontward of the motor housing, a spindle rotated by the motor, a hammer housed inside the hammer case and configured to be rotated by the spindle, and an anvil housed inside the hammer case which anvil is configured to be impacted by the hammer. In this impact driver, a length from a rear end of the motor housing to a front end of the anvil (i.e., the front-rear length of a main body) is less than 128 mm.
    Type: Application
    Filed: January 10, 2019
    Publication date: May 16, 2019
    Inventors: Ryunosuke KUMAGAI, Tokuo HIRABAYASHI, Hidenori NAGASAKA, Manabu SUGIMOTO
  • Patent number: 10245711
    Abstract: An electric power tool includes a housing, a motor, a deceleration mechanism, a final output shaft, a vibration mechanism, a vibration switching member, a stop member, and an expansion prevention portion. The vibration mechanism provides a vibration in an axial direction to the final output shaft. The vibration switching member is accommodated in a slit axially disposed on a front end of a tubular portion and moved back and forth in the slit by an operation from outside to switch on and off actuation of the vibration mechanism. The stop member is installed on the front end of the tubular portion to cover the slit.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: April 2, 2019
    Assignee: MAKITA CORPORATION
    Inventor: Hidenori Nagasaka
  • Patent number: 10213907
    Abstract: An impact driver or impact tool includes a motor, a motor housing that houses the motor, a grip housing integrally provided with the motor housing, a hammer case is disposed frontward of the motor housing, a spindle rotated by the motor, a hammer housed inside the hammer case and configured to be rotated by the spindle, and an anvil housed inside the hammer case which anvil is configured to be impacted by the hammer. In this impact driver, a length from a rear end of the motor housing to a front end of the anvil (i.e., the front-rear length of a main body) is less than 128 mm.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: February 26, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Ryunosuke Kumagai, Tokuo Hirabayashi, Hidenori Nagasaka, Manabu Sugimoto
  • Publication number: 20180304380
    Abstract: An electrical apparatus comprises an extension portion extending in a direction that intersects the direction in which a battery attachment surface of a battery base extends. A battery includes a plurality of battery cells with negative electrode side end faces. The battery has negative electrode side holding portions adjacent to the exterior of each of the negative electrode side end faces. The negative electrode side holding portions are located closer to the inner region of the center of gravity of the apparatus than a virtual plane to which a lateral rear side of the extension portion and a lateral rear side of the battery are tangent.
    Type: Application
    Filed: April 3, 2018
    Publication date: October 25, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Hidenori NAGASAKA, Tomohiko IMAE
  • Publication number: 20180138725
    Abstract: A pair of right and left fixing holes and a pair of strap attachment holes are provided on a rear surface of a main body housing at a position which does not protrude from a side area S in a planar view. A bottom edge portion of an upper recessed portion is provided above the fixing hole to cover each of the right and left fixing holes, the strap attachment holes are provided to be coaxial with the bottom edge portion, and it is ensured that durability and compactness of the charger are obtained.
    Type: Application
    Filed: January 12, 2018
    Publication date: May 17, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Hideyuki TAGA, Yasuhiro TABUCHI, Hidenori NAGASAKA, Kiyozumi KOKAWA, Shinsuke OKUDA
  • Patent number: 9906055
    Abstract: A pair of right and left fixing holes and a pair of strap attachment holes are provided on a rear surface of a main body housing at a position which does not protrude from a side area S in a planar view. A bottom edge portion of an upper recessed portion is provided above the fixing hole to cover each of the right and left fixing holes, the strap attachment holes are provided to be coaxial with the bottom edge portion, and it is ensured that durability and compactness of the charger are obtained.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: February 27, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Hideyuki Taga, Yasuhiro Tabuchi, Hidenori Nagasaka, Kiyozumi Kokawa, Shinsuke Okuda
  • Publication number: 20180009098
    Abstract: A rechargeable electric power tool includes a motor that includes a rotation shaft, a motor housing that houses the motor, a gear housing disposed ahead of the motor, a final output shaft that is held onto the gear housing and perpendicular to the rotation shaft, and a loop-shaped handle housing disposed at a rear of the motor housing, and a battery mounting portion configured to hold two battery packs is disposed at a rear portion of the handle housing.
    Type: Application
    Filed: April 21, 2017
    Publication date: January 11, 2018
    Applicant: MAKITA CORPORATION
    Inventors: Hidenori NAGASAKA, Tomohiko IMAE
  • Publication number: 20170239801
    Abstract: An angle tool having an output shaft part the height of which is low is provided. The angle tool includes an output shaft having a chuck part capable of holding a bit, a shaft that is provided so as to intersect the output shaft and that transmits drive force to the output shaft, and a gear housing that accommodates the shaft. The entirety of the chuck part is disposed in the gear housing. The output shaft includes a bevel gear that receives drive force from the shaft, and the chuck part is disposed inside the bevel gear. The chuck part is disposed in front of the shaft so as to intersect an extended line of a center axis of the shaft.
    Type: Application
    Filed: January 19, 2017
    Publication date: August 24, 2017
    Applicant: MAKITA CORPORATION
    Inventors: Tomoyuki KONDO, Tokuo HIRABAYASHI, Hidenori NAGASAKA
  • Patent number: D866280
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: November 12, 2019
    Assignee: MAKITA CORPORATION
    Inventors: Kento Nakamura, Hidenori Nagasaka, Tomohiko Imae