Patents by Inventor Takao Kuroyanagi

Takao Kuroyanagi 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: 11396038
    Abstract: A fastening tool includes a housing, a handle, an anvil, a pin-gripping part, a motor, and a driving mechanism. The driving mechanism is configured to move the pin-gripping part along a first axis defining a front-rear direction, relative to the anvil. The driving mechanism includes a rotary member, a movable member, a driving gear and an idler gear. The rotary member has a driven gear formed on its outer periphery and is rotatable around the first axis. The movable member is connected to the pin-gripping part and configured to be linearly moved in the front-rear direction by rotation of the rotary member. The driving gear is configured to be rotated around a second axis extending in parallel to the first axis below the first axis. The idler gear is engaged with the driving gear and the driven gear.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: July 26, 2022
    Assignee: MAKITA CORPORATION
    Inventors: Toshihito Yabunaka, Hiroki Ikuta, Takao Kuroyanagi, Koichi Yakabe
  • Publication number: 20210394254
    Abstract: A fastening tool includes a motor, a fastening mechanism, a tool body and a main handle. The motor includes a motor body and a motor shaft. The fastening mechanism is configured to fasten workpieces via a fastener by pulling a pin of the fastener rearward relative to a tubular part of the fastener along a driving axis defining a front-rear direction of the fastening tool. The tool body houses the motor and the fastening mechanism. The main handle extends in a direction crossing the driving axis and connected to the tool body such that the main handle and the tool body together form an annular part. A rotational axis of the motor shaft extends parallel to the driving axis. A portion of the main handle is located in a rear space extending behind the motor body.
    Type: Application
    Filed: June 8, 2021
    Publication date: December 23, 2021
    Applicant: MAKITA CORPORATION
    Inventors: Toshihito YABUNAKA, Hiroki IKUTA, Koichi YAKABE, Takao KUROYANAGI
  • Patent number: 11185913
    Abstract: A fastening tool includes a bolt-gripping part, an anvil, a bolt-gripping-part driving mechanism, a motor, a housing, and thrust rolling bearings. The bolt-gripping-part driving mechanism includes a first mechanism part supported by the housing and a second mechanism part connected to the bolt-gripping part. The second mechanism part is configured to be driven in a longitudinal-axis direction by the first mechanism part being rotationally driven, so that the bolt-gripping part is moved in the longitudinal-axis direction relative to the anvil. The thrust rolling bearings are disposed on a first direction side and a second direction side of the first mechanism part, respectively.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: November 30, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Hiroki Ikuta, Toshihito Yabunaka, Takao Kuroyanagi
  • Patent number: 11161168
    Abstract: A fastening tool includes a housing, a fastener-abutment part, a pin-gripping part, a motor, a driving mechanism and a handle. The housing extends in a front-rear direction along a driving axis. The driving mechanism is configured to move the pin-gripping part rearward along the driving axis relative to the fastener-abutment part. The driving mechanism includes a rotary member and a movable member configured to linearly move in the front-rear direction when the rotary member is rotationally driven. The handle protrudes downward from the housing and has a trigger. A rotation axis of a motor shaft extends in parallel to the driving axis on a lower side of the driving axis. A virtual plane including the driving axis and the rotation axis passes a center of the handle in a left-right direction. The trigger is disposed between the rotary member and a motor body in the front-rear direction.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: November 2, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Toshihito Yabunaka, Hiroki Ikuta, Takao Kuroyanagi
  • Patent number: 10994325
    Abstract: A fastening tool configured to fasten a workpiece via a multi-piece swage type fastener including a pin and a collar includes an anvil, a pin-gripping part, a driving mechanism, an electric motor, a control part and a housing. The driving mechanism is configured to move the pin-gripping part relative to the anvil in a first direction along an axis so as to cause the anvil to press the collar engaged with a shaft part of the pin in a second direction and in a radially inward direction. An operation mode of the driving mechanism can be selectively switched between a plurality of operation modes including a first mode, in which a process of fastening the workpiece is completed based on a state of the fastener, and a second mode, in which the process of fastening the workpiece is completed based on a driving state of the motor.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: May 4, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Hiroki Ikuta, Toshihito Yabunaka, Takao Kuroyanagi
  • Publication number: 20210069773
    Abstract: A fastening tool includes a housing, a handle, an anvil, a pin-gripping part, a motor, and a driving mechanism. The driving mechanism is configured to move the pin-gripping part along a first axis defining a front-rear direction, relative to the anvil. The driving mechanism includes a rotary member, a movable member, a driving gear and an idler gear. The rotary member has a driven gear formed on its outer periphery and is rotatable around the first axis. The movable member is connected to the pin-gripping part and configured to be linearly moved in the front-rear direction by rotation of the rotary member. The driving gear is configured to be rotated around a second axis extending in parallel to the first axis below the first axis. The idler gear is engaged with the driving gear and the driven gear.
    Type: Application
    Filed: August 26, 2020
    Publication date: March 11, 2021
    Applicant: MAKITA CORPORATION
    Inventors: Toshihito YABUNAKA, Hiroki IKUTA, Takao KUROYANAGI, Koichi YAKABE
  • Publication number: 20200130047
    Abstract: A fastening tool includes a housing, a fastener-abutment part, a pin-gripping part, a motor, a driving mechanism and a handle. The housing extends in a front-rear direction along a driving axis. The driving mechanism is configured to move the pin-gripping part rearward along the driving axis relative to the fastener-abutment part. The driving mechanism includes a rotary member and a movable member configured to linearly move in the front-rear direction when the rotary member is rotationally driven. The handle protrudes downward from the housing and has a trigger. A rotation axis of a motor shaft extends in parallel to the driving axis on a lower side of the driving axis. A virtual plane including the driving axis and the rotation axis passes a center of the handle in a left-right direction. The trigger is disposed between the rotary member and a motor body in the front-rear direction.
    Type: Application
    Filed: June 8, 2018
    Publication date: April 30, 2020
    Applicant: MAKITA CORPORATION
    Inventors: Toshihito YABUNAKA, Hiroki IKUTA, Takao KUROYANAGI
  • Patent number: 10532454
    Abstract: An electric working machine according to one aspect of the present disclosure includes an output shaft, a motor, a transmitting device, a drive device, a controller, and a current path. The transmitting device has transmittable allowable torque and transmits rotation of the motor to the output shaft. The drive device energizes the motor with electric supply from a battery in accordance with a command from outside the electric working machine. The current path is configured to be able to energize the motor with a current value larger than an allowable current value required to limit torque generated in the transmitting device due to rotation of the motor to the allowable torque or smaller.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: January 14, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Shingo Kamiya, Haruki Tejima, Takao Kuroyanagi, Masanori Higashi
  • Publication number: 20190314888
    Abstract: A fastening tool configured to fasten a workpiece via a multi-piece swage type fastener including a pin and a collar includes an anvil, a pin-gripping part, a driving mechanism, an electric motor, a control part and a housing. The driving mechanism is configured to move the pin-gripping part relative to the anvil in a first direction along an axis so as to cause the anvil to press the collar engaged with a shaft part of the pin in a second direction and in a radially inward direction. An operation mode of the driving mechanism can be selectively switched between a plurality of operation modes including a first mode, in which a process of fastening the workpiece is completed based on a state of the fastener, and a second mode, in which the process of fastening the workpiece is completed based on a driving state of the motor.
    Type: Application
    Filed: December 19, 2017
    Publication date: October 17, 2019
    Applicant: MAKITA CORPORATION
    Inventors: Hiroki IKUTA, Toshihito YABUNAKA, Takao KUROYANAGI
  • Publication number: 20190283112
    Abstract: A fastening tool includes a bolt-gripping part, an anvil, a bolt-gripping-part driving mechanism, a motor, a housing, and thrust rolling bearings. The bolt-gripping-part driving mechanism includes a first mechanism part supported by the housing and a second mechanism part connected to the bolt-gripping part. The second mechanism part is configured to be driven in a longitudinal-axis direction by the first mechanism part being rotationally driven, so that the bolt-gripping part is moved in the longitudinal-axis direction relative to the anvil. The thrust rolling bearings are disposed on a first direction side and a second direction side of the first mechanism part, respectively.
    Type: Application
    Filed: November 24, 2017
    Publication date: September 19, 2019
    Applicant: MAKITA CORPORATION
    Inventors: Hiroki IKUTA, Toshihito YABUNAKA, Takao KUROYANAGI
  • Publication number: 20170334054
    Abstract: An electric working machine according to one aspect of the present disclosure includes an output shaft, a motor, a transmitting device, a drive device, a controller, and a current path. The transmitting device has transmittable allowable torque and transmits rotation of the motor to the output shaft. The drive device energizes the motor with electric supply from a battery in accordance with a command from outside the electric working machine. The current path is configured to be able to energize the motor with a current value larger than an allowable current value required to limit torque generated in the transmitting device due to rotation of the motor to the allowable toque or smaller.
    Type: Application
    Filed: May 17, 2017
    Publication date: November 23, 2017
    Applicant: MAKITA CORPORATION
    Inventors: Shingo KAMIYA, Haruki TEJIMA, Takao KUROYANAGI, Masanori HIGASHI
  • Publication number: 20170326720
    Abstract: A power tool, such as an impact driver, includes a motor housing that houses a motor, and a battery-mount part to which a battery pack having a rated voltage of 18 V is mountable. A ratio of the maximum width of the motor housing to the maximum width of the battery pack is 0.75 or less. A forward/reverse-switching lever is slidable in a left-right direction to change the rotational direction of the motor and is disposed between the motor housing and the battery pack. A maximum-slide position of the forward/reverse-switching lever in the left-right direction is inward of a ground plane when the power tool is laid horizontally on its side on the ground plane.
    Type: Application
    Filed: April 18, 2017
    Publication date: November 16, 2017
    Inventors: Takao KUROYANAGI, Haruki TEJIMA
  • Patent number: 9308638
    Abstract: A power tool includes a main body portion and a grip portion. The main body portion includes a motor unit. The grip portion extends from the main body portion between a front end and a rear end of the main body portion. The main body portion further includes an auxiliary handle mounting structure disposed between the rear end of the main body portion and a rearmost end of a region where the grip portion meets the main body portion. An auxiliary handle member is coupled to the auxiliary handle mounting structure of the main body portion.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: April 12, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Tomoyuki Kondo, Takao Kuroyanagi
  • Patent number: 9016397
    Abstract: A suspending attachment attached to a cylindrical housing of an electric power tool whose output shaft protrudes from a housing distal end includes a ring-shaped distal end portion fitted to the housing distal end, lower retaining portions of which front ends are connected to the distal end portion and extending rearward along a housing lower-half outer surface with a space through which the housing does not radially come off, one upper retaining portion of which a front end is connected to the distal end portion and extending rearward along a housing upper-half outer surface with a space from each lower retaining portion, through which the housing does not come off, a hook portion extending from at least one of rear ends of the lower and upper retaining portions rearward of the housing, and a connecting member coupling the lower and upper retaining portions over a housing rear surface.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: April 28, 2015
    Assignee: Makita Corporation
    Inventors: Takao Kuroyanagi, Hidenori Nagasaka, Ryunosuke Kumagai
  • Publication number: 20140196921
    Abstract: A power tool includes a main body portion and a grip portion. The main body portion includes a motor unit. The grip portion extends from the main body portion between a front end and a rear end of the main body portion. The main body portion further includes an auxiliary handle mounting structure disposed between the rear end of the main body portion and a rearmost end of a region where the grip portion meets the main body portion. An auxiliary handle member is coupled to the auxiliary handle mounting structure of the main body portion.
    Type: Application
    Filed: January 17, 2013
    Publication date: July 17, 2014
    Applicant: MAKITA CORPORATION
    Inventors: Tomoyuki KONDO, Takao KUROYANAGI
  • Publication number: 20130180368
    Abstract: In an impact driver, a supporting ring, to which a carabiner and so on of a socket is connected, is provided in a shaft support portion in a front end of a hammer case so that the supporting ring is able to be attached and detached by using a screw. Further, a falling prevention element (wire) is provided in the supporting ring. The falling prevention element comes to a position adjacent to the screw which clamps the supporting ring so that the supporting ring is prevented from falling from the impact driver.
    Type: Application
    Filed: December 4, 2012
    Publication date: July 18, 2013
    Inventors: Ryunosuke KUMAGAI, Tokuo HIRABAYASHI, Takao KUROYANAGI, Manabu SUGIMOTO
  • Patent number: 8485275
    Abstract: A technique that increases operability in changing the rotational speed of a spindle in a power tool. The rotational speed can be changed in three levels by utilizing a planetary gear mechanism. The third gear position is located in an intermediate position in the sliding direction of the speed changing part. The first speed change position is located on one side of the third speed change position. The second speed change position is located on the other side of the third speed change position. During operation, shifting between the first and third speeds can be done without going through the second speed each time. Further, shifting between the second and third speeds can be done without going through the first speed. Therefore, speed change shifting can be facilitated.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: July 16, 2013
    Assignee: Makita Corporation
    Inventors: Takao Kuroyanagi, Hideki Abe
  • Publication number: 20120269663
    Abstract: A battery pack can be mounted to and removed from at least one of a fan main body and a support device at least when the fan main body is supported on an installation surface via the support device.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 25, 2012
    Applicant: MAKITA CORPORATION
    Inventors: Takeshi KAMIYA, Takashi KIYOHARA, Takao KUROYANAGI
  • Publication number: 20120085560
    Abstract: A suspending attachment attached to a cylindrical housing of an electric power tool whose output shaft protrudes from a housing distal end includes a ring-shaped distal end portion fitted to the housing distal end, lower retaining portions of which front ends are connected to the distal end portion and extending rearward along a housing lower-half outer surface with a space through which the housing does not radially come off, one upper retaining portion of which a front end is connected to the distal end portion and extending rearward along a housing upper-half outer surface with a space from each lower retaining portion, through which the housing does not come off, a hook portion extending from at least one of rear ends of the lower and upper retaining portions rearward of the housing, and a connecting member coupling the lower and upper retaining portions over a housing rear surface.
    Type: Application
    Filed: August 25, 2011
    Publication date: April 12, 2012
    Applicant: MAKITA CORPORATION
    Inventors: Takao KUROYANAGI, Hidenori NAGASAKA, Ryunosuke KUMAGAI
  • Patent number: D907979
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: January 19, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Kento Nakamura, Takao Kuroyanagi