Patents by Inventor Hidekazu Yuasa

Hidekazu Yuasa 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: 11904451
    Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: February 20, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Fumiaki Sawano, Masaaki Okada, Hidekazu Yuasa
  • Patent number: 11224961
    Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: January 18, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Fumiaki Sawano, Masaaki Okada, Hidekazu Yuasa
  • Patent number: 10948166
    Abstract: Hinge devices couple light source units to a base such that the light source units are rotatable around first axes. Each light source unit is rotatable between a first position and a second position around a corresponding first axis of the first axes. Rotation mechanisms couple the light source units to the hinge devices such that the light source units are rotatable around second axes transverse to the first axes. The hinge devices are configured such that when each light source unit rotates from the first position to the second position, rotation directions of the light source units are different. The rotation mechanisms define rotation ranges of the light source units around the second axes to achieve a reference state where the light source units are collected together and light-outgoing surfaces of the light source units face outward when each light source unit is in the first position.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: March 16, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuaki Ohara, Kazuma Uematsu, Hidekazu Yuasa, Kazuto Toyama, Toshio Kudo
  • Patent number: 10661424
    Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled, amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: May 26, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Fumiaki Sawano, Masaaki Okada, Hidekazu Yuasa
  • Publication number: 20200101586
    Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.
    Type: Application
    Filed: December 3, 2019
    Publication date: April 2, 2020
    Inventors: Fumiaki SAWANO, Masaaki OKADA, Hidekazu YUASA
  • Publication number: 20200078921
    Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.
    Type: Application
    Filed: November 15, 2019
    Publication date: March 12, 2020
    Inventors: Fumiaki SAWANO, Masaaki OKADA, Hidekazu YUASA
  • Publication number: 20190234587
    Abstract: Hinge devices couple light source units to a base such that the light source units are rotatable around first axes. Each light source unit is rotatable between a first position and a second position around a corresponding first axis of the first axes. Rotation mechanisms couple the light source units to the hinge devices such that the light source units are rotatable around second axes transverse to the first axes. The hinge devices are configured such that when each light source unit rotates from the first position to the second position, rotation directions of the light source units are different. The rotation mechanisms define rotation ranges of the light source units around the second axes to achieve a reference state where the light source units are collected together and light-outgoing surfaces of the light source units face outward when each light source unit is in the first position.
    Type: Application
    Filed: August 29, 2017
    Publication date: August 1, 2019
    Inventors: Kazuaki OHARA, Kazuma UEMATSU, Hidekazu YUASA, Kazuto TOYAMA, Toshio KUDO
  • Patent number: 9712091
    Abstract: A power tool includes a motor, a drive unit driven by the motor, and a trigger switch and a forward-reverse switch each operable by a user. The trigger switch is switchable between an activation state and a deactivation state. The forward-reverse switch switches a motor rotation between forward and reverse. The power tool also includes a control unit that drives the motor based on operation of the trigger switch and allows switching of an operation mode of the power tool between first and second modes. In the first mode, the motor rotation is switched to that selected by the forward-reverse switch. In the second mode, when the activation state is switched to the deactivation state, the motor rotation is switched so that the motor is driven in a direction opposite to the present rotation direction when the trigger switch is activated next.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: July 18, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Fumiaki Sawano, Masaaki Okada, Hidekazu Yuasa, Norio Sawada
  • Publication number: 20170036337
    Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a triqger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled, amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.
    Type: Application
    Filed: July 20, 2016
    Publication date: February 9, 2017
    Inventors: Fumiaki SAWANO, Masaaki OKADA, Hidekazu YUASA
  • Publication number: 20160173015
    Abstract: A power tool includes a motor, a drive unit driven by the motor, and a trigger switch and a forward-reverse switch each operable by a user. The trigger switch is switchable between an activation state and a deactivation state. The forward-reverse switch switches a motor rotation between forward and reverse. The power tool also includes a control unit that drives the motor based on operation of the trigger switch and allows switching of an operation mode of the power tool between first and second modes. In the first mode, the motor rotation is switched to that selected by the forward-reverse switch. In the second mode, when the activation state is switched to the deactivation state, the motor rotation is switched so that the motor is driven in a direction opposite to the present rotation direction when the trigger switch is activated next.
    Type: Application
    Filed: November 30, 2015
    Publication date: June 16, 2016
    Inventors: Fumiaki SAWANO, Masaaki OKADA, Hidekazu YUASA, Norio SAWADA
  • Patent number: 8534375
    Abstract: An electric power tool includes a body part for outputting a rotational force at one end thereof, a grip part provided to extend from the body part in an intersecting relationship with the body part, and a suspension link provided at the other end of the body part for hanging the body part. The suspension link is configured to ensure that, if the body part is suspended from the suspension link using the suspension link as a pivot point, the electric power tool is kept by a weight balance in a horizontal posture in which the extension direction of the grip part is substantially orthogonal to the vertical direction or an inclined horizontal posture in which the joint portion of the body part and the grip part is positioned at the upper side.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: September 17, 2013
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Matsumoto, Masamichi Nakamura, Hidekazu Yuasa
  • Publication number: 20110073340
    Abstract: An electric power tool includes a body part for outputting a rotational force at one end thereof, a grip part provided to extend from the body part in an intersecting relationship with the body part, and a suspension link provided at the other end of the body part for hanging the body part. The suspension link is configured to ensure that, if the body part is suspended from the suspension link using the suspension link as a pivot point, the electric power tool is kept by a weight balance in a horizontal posture in which the extension direction of the grip part is substantially orthogonal to the vertical direction or an inclined horizontal posture in which the joint portion of the body part and the grip part is positioned at the upper side.
    Type: Application
    Filed: September 24, 2010
    Publication date: March 31, 2011
    Applicant: Panasonic Electric Works Power Tools Co., Ltd.
    Inventors: Hiroshi MATSUMOTO, Masamichi Nakamura, Hidekazu Yuasa
  • Patent number: 7828074
    Abstract: A hammer drill includes a motor; a spindle rotatingly driven by the motor and holding an output bit; a motion conversion member for converting rotational movement of the motor to reciprocating movement; a striker reciprocatingly driven by the motion conversion member for applying an axial striking force to the output bit; a striking-motion-releasing mechanism for releasing the striking force applying action exercised by the striker; and a tightening-torque adjusting clutch for interrupting the transfer of the rotational force to the output bit by increasing a load torque.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: November 9, 2010
    Assignee: Panasonic Electric Works Co., Ltd.
    Inventors: Hiroyuki Tsubakimoto, Koichi Hashimoto, Hisashi Oda, Hidekazu Yuasa, Kunihiko Tatsu
  • Patent number: 7694750
    Abstract: A hammer drill includes a motor; a spindle rotatingly driven by the motor and holding an output bit; a motion conversion member for converting rotational movement of the motor to reciprocating movement; a striker reciprocatingly driven by the motion conversion member for applying an axial striking force to the output bit; a striking-motion-releasing mechanism for releasing the striking force applying action exercised by the striker; and a tightening-torque adjusting clutch for interrupting the transfer of the rotational force to the output bit by increasing a load torque.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: April 13, 2010
    Assignee: Panasonic Electric Works Co., Ltd.
    Inventors: Hiroyuki Tsubakimoto, Koichi Hashimoto, Hisashi Oda, Hidekazu Yuasa, Kunihiko Tatsu
  • Publication number: 20090229845
    Abstract: A hammer drill includes a motor; a spindle rotatingly driven by the motor and holding an output bit; a motion conversion member for converting rotational movement of the motor to reciprocating movement; a striker reciprocatingly driven by the motion conversion member for applying an axial striking force to the output bit; a striking-motion-releasing mechanism for releasing the striking force applying action exercised by the striker; and a tightening-torque adjusting clutch for interrupting the transfer of the rotational force to the output bit by increasing a load torque.
    Type: Application
    Filed: May 27, 2009
    Publication date: September 17, 2009
    Applicant: Matsushita Electric Works, Ltd.
    Inventors: Hiroyuki Tsubakimoto, Koichi Hashimoto, Hisashi Oda, Hidekazu Yuasa, Kunihiko Tatsu
  • Publication number: 20060266536
    Abstract: A hammer drill includes a motor; a spindle rotatingly driven by the motor and holding an output bit; a motion conversion member for converting rotational movement of the motor to reciprocating movement; a striker reciprocatingly driven by the motion conversion member for applying an axial striking force to the output bit; a striking-motion-releasing mechanism for releasing the striking force applying action exercised by the striker; and a tightening-torque adjusting clutch for interrupting the transfer of the rotational force to the output bit by increasing a load torque.
    Type: Application
    Filed: May 26, 2006
    Publication date: November 30, 2006
    Applicant: Matsushita Electric Works, Ltd.
    Inventors: Hiroyuki Tsubakimoto, Koichi Hashimoto, Hisashi Oda, Hidekazu Yuasa, Kunihiko Tatsu