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).
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Patent number: 11904451Abstract: 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: GrantFiled: November 15, 2019Date of Patent: February 20, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Fumiaki Sawano, Masaaki Okada, Hidekazu Yuasa
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Patent number: 11224961Abstract: 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: GrantFiled: December 3, 2019Date of Patent: January 18, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Fumiaki Sawano, Masaaki Okada, Hidekazu Yuasa
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Patent number: 10948166Abstract: 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: GrantFiled: August 29, 2017Date of Patent: March 16, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Kazuaki Ohara, Kazuma Uematsu, Hidekazu Yuasa, Kazuto Toyama, Toshio Kudo
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Patent number: 10661424Abstract: 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: GrantFiled: July 20, 2016Date of Patent: May 26, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Fumiaki Sawano, Masaaki Okada, Hidekazu Yuasa
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Publication number: 20200101586Abstract: 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: ApplicationFiled: December 3, 2019Publication date: April 2, 2020Inventors: Fumiaki SAWANO, Masaaki OKADA, Hidekazu YUASA
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Publication number: 20200078921Abstract: 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: ApplicationFiled: November 15, 2019Publication date: March 12, 2020Inventors: Fumiaki SAWANO, Masaaki OKADA, Hidekazu YUASA
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Publication number: 20190234587Abstract: 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: ApplicationFiled: August 29, 2017Publication date: August 1, 2019Inventors: Kazuaki OHARA, Kazuma UEMATSU, Hidekazu YUASA, Kazuto TOYAMA, Toshio KUDO
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Patent number: 9712091Abstract: 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: GrantFiled: November 30, 2015Date of Patent: July 18, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Fumiaki Sawano, Masaaki Okada, Hidekazu Yuasa, Norio Sawada
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Publication number: 20170036337Abstract: 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: ApplicationFiled: July 20, 2016Publication date: February 9, 2017Inventors: Fumiaki SAWANO, Masaaki OKADA, Hidekazu YUASA
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Publication number: 20160173015Abstract: 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: ApplicationFiled: November 30, 2015Publication date: June 16, 2016Inventors: Fumiaki SAWANO, Masaaki OKADA, Hidekazu YUASA, Norio SAWADA
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Patent number: 8534375Abstract: 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: GrantFiled: September 24, 2010Date of Patent: September 17, 2013Assignee: Panasonic CorporationInventors: Hiroshi Matsumoto, Masamichi Nakamura, Hidekazu Yuasa
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Publication number: 20110073340Abstract: 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: ApplicationFiled: September 24, 2010Publication date: March 31, 2011Applicant: Panasonic Electric Works Power Tools Co., Ltd.Inventors: Hiroshi MATSUMOTO, Masamichi Nakamura, Hidekazu Yuasa
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Patent number: 7828074Abstract: 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: GrantFiled: May 27, 2009Date of Patent: November 9, 2010Assignee: Panasonic Electric Works Co., Ltd.Inventors: Hiroyuki Tsubakimoto, Koichi Hashimoto, Hisashi Oda, Hidekazu Yuasa, Kunihiko Tatsu
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Patent number: 7694750Abstract: 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: GrantFiled: May 26, 2006Date of Patent: April 13, 2010Assignee: Panasonic Electric Works Co., Ltd.Inventors: Hiroyuki Tsubakimoto, Koichi Hashimoto, Hisashi Oda, Hidekazu Yuasa, Kunihiko Tatsu
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Publication number: 20090229845Abstract: 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: ApplicationFiled: May 27, 2009Publication date: September 17, 2009Applicant: Matsushita Electric Works, Ltd.Inventors: Hiroyuki Tsubakimoto, Koichi Hashimoto, Hisashi Oda, Hidekazu Yuasa, Kunihiko Tatsu
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Publication number: 20060266536Abstract: 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: ApplicationFiled: May 26, 2006Publication date: November 30, 2006Applicant: Matsushita Electric Works, Ltd.Inventors: Hiroyuki Tsubakimoto, Koichi Hashimoto, Hisashi Oda, Hidekazu Yuasa, Kunihiko Tatsu