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: 10906163Abstract: 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: GrantFiled: October 16, 2019Date of Patent: February 2, 2021Assignee: MAKITA CORPORATIONInventors: Hidenori Nagasaka, Ryunosuke Kumagai, Koji Tsukamoto, Tomonori Kawase, Kosuke Ito, Tokuo Hirabayashi, Yasuhito Kawai
-
Publication number: 20210028634Abstract: 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: ApplicationFiled: October 7, 2020Publication date: January 28, 2021Applicant: MAKITA CORPORATIONInventors: Hideyuki TAGA, Yasuhiro TABUCHI, Hidenori NAGASAKA, Kiyozumi KOKAWA, Shinsuke OKUDA
-
Patent number: 10840717Abstract: 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: GrantFiled: January 12, 2018Date of Patent: November 17, 2020Assignee: MAKITA CORPORATIONInventors: Hideyuki Taga, Yasuhiro Tabuchi, Hidenori Nagasaka, Kiyozumi Kokawa, Shinsuke Okuda
-
Patent number: 10751809Abstract: 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: GrantFiled: April 3, 2018Date of Patent: August 25, 2020Assignee: MAKITA CORPORATIONInventors: Hidenori Nagasaka, Tomohiko Imae
-
Publication number: 20200262036Abstract: 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: ApplicationFiled: February 18, 2020Publication date: August 20, 2020Inventors: Yuta ARAKI, Hidenori NAGASAKA, Manabu SUGIMOTO
-
Patent number: 10720863Abstract: 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: GrantFiled: April 10, 2019Date of Patent: July 21, 2020Assignee: MAKITA CORPORATIONInventors: Itsuku Kato, Katsuna Hayashi, Kouichi Takeda, Hidenori Nagasaka, Takeshi Kamiya
-
Publication number: 20200139459Abstract: 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: ApplicationFiled: October 2, 2019Publication date: May 7, 2020Inventors: Hidenori NAGASAKA, Shogo TOMINAGA
-
Patent number: 10589412Abstract: 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: GrantFiled: April 21, 2017Date of Patent: March 17, 2020Assignee: MAKITA CORPORATIONInventors: Hidenori Nagasaka, Tomohiko Imae
-
Publication number: 20200047319Abstract: 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: ApplicationFiled: October 16, 2019Publication date: February 13, 2020Inventors: Hidenori NAGASAKA, Ryunosuke KUMAGAI, Koji TSUKAMOTO, Tomonori KAWASE, Kosuke ITO, Tokuo HIRABAYASHI, Yasuhito KAWAI
-
Patent number: 10478950Abstract: 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: GrantFiled: November 21, 2016Date of Patent: November 19, 2019Assignee: MAKITA CORPORATIONInventors: Hidenori Nagasaka, Ryunosuke Kumagai, Koji Tsukamoto, Tomonori Kawase, Kosuke Ito, Tokuo Hirabayashi, Yasuhito Kawai
-
Publication number: 20190319563Abstract: 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: ApplicationFiled: April 10, 2019Publication date: October 17, 2019Inventors: Itsuku KATO, Katsuna HAYASHI, Kouichi TAKEDA, Hidenori NAGASAKA, Takeshi KAMIYA
-
Publication number: 20190143491Abstract: 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: ApplicationFiled: January 10, 2019Publication date: May 16, 2019Inventors: Ryunosuke KUMAGAI, Tokuo HIRABAYASHI, Hidenori NAGASAKA, Manabu SUGIMOTO
-
Patent number: 10245711Abstract: 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: GrantFiled: November 9, 2016Date of Patent: April 2, 2019Assignee: MAKITA CORPORATIONInventor: Hidenori Nagasaka
-
Patent number: 10213907Abstract: 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: GrantFiled: April 3, 2017Date of Patent: February 26, 2019Assignee: MAKITA CORPORATIONInventors: Ryunosuke Kumagai, Tokuo Hirabayashi, Hidenori Nagasaka, Manabu Sugimoto
-
Publication number: 20180304380Abstract: 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: ApplicationFiled: April 3, 2018Publication date: October 25, 2018Applicant: MAKITA CORPORATIONInventors: Hidenori NAGASAKA, Tomohiko IMAE
-
Publication number: 20180138725Abstract: 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: ApplicationFiled: January 12, 2018Publication date: May 17, 2018Applicant: MAKITA CORPORATIONInventors: Hideyuki TAGA, Yasuhiro TABUCHI, Hidenori NAGASAKA, Kiyozumi KOKAWA, Shinsuke OKUDA
-
Patent number: 9906055Abstract: 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: GrantFiled: May 28, 2013Date of Patent: February 27, 2018Assignee: MAKITA CORPORATIONInventors: Hideyuki Taga, Yasuhiro Tabuchi, Hidenori Nagasaka, Kiyozumi Kokawa, Shinsuke Okuda
-
Publication number: 20180009098Abstract: 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: ApplicationFiled: April 21, 2017Publication date: January 11, 2018Applicant: MAKITA CORPORATIONInventors: Hidenori NAGASAKA, Tomohiko IMAE
-
Publication number: 20170239801Abstract: 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: ApplicationFiled: January 19, 2017Publication date: August 24, 2017Applicant: MAKITA CORPORATIONInventors: Tomoyuki KONDO, Tokuo HIRABAYASHI, Hidenori NAGASAKA
-
Patent number: D866280Type: GrantFiled: May 7, 2018Date of Patent: November 12, 2019Assignee: MAKITA CORPORATIONInventors: Kento Nakamura, Hidenori Nagasaka, Tomohiko Imae