Patents by Inventor Toshihiko Tachibana
Toshihiko Tachibana 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: 11446806Abstract: A reciprocating tool includes: a motor; a gear case; a converting mechanism; a plunger; a sealing member; and an auxiliary sealing member. The converting mechanism is accommodated in the gear case and configured to convert rotating motion of the motor into reciprocating movement in a predetermined direction. The plunger is provided with a mounting portion on which an end bit is mountable, and is reciprocally movably supported to the gear case. The plunger is driven by the converting mechanism to reciprocally move in the predetermined direction. The plunger is reciprocally movably inserted into the sealing member in the predetermined direction. The sealing member is supported by the gear case. The auxiliary sealing member is supported by the sealing member and sealing an outer peripheral surface of the plunger.Type: GrantFiled: October 27, 2017Date of Patent: September 20, 2022Assignee: KOKI HOLDINGS CO., LTD.Inventors: Takaaki Onishi, Toshihiko Tachibana, Shogo Shibata
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Patent number: 10806680Abstract: A dental polymerizable composition including a glass powder and a (meth)acrylate is provided. The glass powder includes zinc, silicon, and fluorine and is substantially free of aluminum.Type: GrantFiled: April 26, 2017Date of Patent: October 20, 2020Assignee: GC CorporationInventors: Kosuke Honda, Hirosato Kato, Ryosuke Yoshimitsu, Satomi Tateiwa, Toshihiko Tachibana
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Publication number: 20190351539Abstract: A reciprocating tool includes: a motor; a gear case; a converting mechanism; a plunger; a sealing member; and an auxiliary sealing member. The converting mechanism is accommodated in the gear case and configured to convert rotating motion of the motor into reciprocating movement in a predetermined direction. The plunger is provided with a mounting portion on which an end bit is mountable, and is reciprocally movably supported to the gear case. The plunger is driven by the converting mechanism to reciprocally move in the predetermined direction. The plunger is reciprocally movably inserted into the sealing member in the predetermined direction. The sealing member is supported by the gear case. The auxiliary sealing member is supported by the sealing member and sealing an outer peripheral surface of the plunger.Type: ApplicationFiled: October 27, 2017Publication date: November 21, 2019Applicant: KOKI HOLDINGS CO., LTD.Inventors: Takaaki ONISHI, Toshihiko TACHIBANA, Shogo SHIBATA
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Publication number: 20190142702Abstract: A dental polymerizable composition including a glass powder and a (meth)acrylate is provided. The glass powder includes zinc, silicon, and fluorine and is substantially free of aluminum.Type: ApplicationFiled: April 26, 2017Publication date: May 16, 2019Inventors: Kosuke HONDA, Hirosato KATO, Ryosuke YOSHIMITSU, Satomi TATEIWA, Toshihiko TACHIBANA
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Publication number: 20190046420Abstract: A dental cement includes: a first component containing a glass powder; a second component containing a polycarboxylic acid-based polymer, an organic polybasic acid, and water. The glass powder contains zinc and silicon. A solubility of a salt of a conjugate base of the organic polybasic acid and zinc ions in water at 20° C. is greater than or equal to 1 g/100 mL.Type: ApplicationFiled: August 3, 2018Publication date: February 14, 2019Inventors: Toshihiko TACHIBANA, Tomoki KONO, Ryosuke YOSHIMITSU, Akishi ARITA, Mizuki NAKAYAMA
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Patent number: 9381638Abstract: The present invention provides a power tool that can be used at a position away from the external power source. The power tool includes a housing, a motor, an end tool, a battery pack, and an inverter. The housing has an upper side portion and a lower side portion. The motor is supported by the housing and driven by alternate-current power. The end tool is supported by the housing and rotatably driven by the motor. The battery pack outputs direct-current voltage. The inverter is disposed on the upper side portion and at a position higher than the motor and configured to convert the direct-current voltage outputted from the battery pack into alternate-current voltage and to supply the motor with alternate-current power.Type: GrantFiled: June 6, 2011Date of Patent: July 5, 2016Assignee: Hitachi Koki Co., Ltd.Inventors: Ai Nakayama, Toshihiko Tachibana, Yasuo Etou, Miyoji Onose, Hiroshi Yamaguchi
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Patent number: 9254563Abstract: The present invention provides a power tool that can be used at a position away from the external power source. The power tool includes a housing, a motor, an end tool, a battery pack, and an inverter. The motor is supported by the housing and driven by alternate-current power. The end tool is supported by the housing and rotatably driven by the motor. The battery pack outputs direct-current voltage. The inverter is disposed outside the housing and is configured to convert the direct-current voltage outputted from the battery pack into alternate-current voltage and supplies the motor with alternate-current power.Type: GrantFiled: June 6, 2011Date of Patent: February 9, 2016Assignee: Hitachi Koki Co., Ltd.Inventors: Hiroshi Yamaguchi, Toshihiko Tachibana, Yasuo Etou, Miyoji Onose, Ai Nakayama
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Patent number: 8616190Abstract: A cutter for cutting a workpiece while using a water includes a housing, an electric motor disposed in the housing, a rotation shaft, a base, and a splashboard. The rotation shaft is supported by the housing for rotatably supporting an end tool driven by the electric motor. The base supports the housing, and has a top surface and a bottom surface to be in contact with the workpiece. The end tool has a part protrudable from the bottom surface. The splashboard section is positioned on the top surface and behind the end tool in a cutting direction. The splashboard section protrudes in a direction away from the top surface and extends in a direction substantially parallel to an axial direction of the rotation shaft.Type: GrantFiled: September 12, 2008Date of Patent: December 31, 2013Assignee: Hitachi Koki Co., Ltd.Inventors: Naoki Tadokoro, Toshihiko Tachibana
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Publication number: 20130068493Abstract: The present invention provides a power tool that can be used at a position away from the external power source. The power tool includes a housing, a motor, an end tool, a battery pack, and an inverter. The motor is supported by the housing and driven by alternate-current power. The end tool is supported by the housing and rotatably driven by the motor. The battery pack outputs direct-current voltage. The inverter is disposed outside the housing and is configured to convert the direct-current voltage outputted from the battery pack into alternate-current voltage and supplies the motor with alternate-current power.Type: ApplicationFiled: June 6, 2011Publication date: March 21, 2013Inventors: Hiroshi Yamaguchi, Toshihiko Tachibana, Yasuo Etou, Miyoji Onose, Ai Nakayama
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Publication number: 20130068492Abstract: The present invention provides a power tool that can be used at a position away from the external power source. The power tool includes a housing, a motor, an end tool, a battery pack, and an inverter. The housing has an upper side portion and a lower side portion. The motor is supported by the housing and driven by alternate-current power. The end tool is supported by the housing and rotatably driven by the motor. The battery pack outputs direct-current voltage. The inverter is disposed on the upper side portion and at a position higher than the motor and configured to convert the direct-current voltage outputted from the battery pack into alternate-current voltage and to supply the motor with alternate-current power.Type: ApplicationFiled: June 6, 2011Publication date: March 21, 2013Applicant: Hitachi Koko Co., Ltd.Inventors: Ai Nakayama, Toshihiko Tachibana, Yasuo Etou, Miyoji Onose, Hiroshi Yamaguchi
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Publication number: 20100147278Abstract: A cutter for cutting a workpiece while using a water includes a housing, an electric motor disposed in the housing, a rotation shaft, a base, and a splashboard. The rotation shaft is supported by the housing for rotatably supporting an end tool driven by the electric motor. The base supports the housing, and has a top surface and a bottom surface to be in contact with the workpiece. The end tool has a part protrudable from the bottom surface. The splashboard section is positioned on the top surface and behind the end tool in a cutting direction. The splashboard section protrudes in a direction away from the top surface and extends in a direction substantially parallel to an axial direction of the rotation shaft.Type: ApplicationFiled: September 12, 2008Publication date: June 17, 2010Applicant: Hitachi Koki Co., Ltd.Inventors: Naoki Tadokoro, Toshihiko Tachibana
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Patent number: 7181850Abstract: A light weight saber saw with reduced numbers of mechanical components and capable of preventing liquid and dust from entering interior of a housing. A plunger reciprocates only in its axial direction in conformity with a longitudinal direction of the housing. A blade holding portion is pivotally movably connected to a front end of the plunger. The blade holding portion includes a plunger chip through which a rear end of a blade is insertable, and a blade holder covering the plunger chip. The blade holder has a track side corresponding to tooth side of the blade, and a track having an inclined track surface is provided at the track side. The housing rotatably supports a roller in rolling contact with the track surface. When the blade is retractingly moved into the housing, the blade holding portion and the blade are pivotally moved totether toward a workpiece by the contact between the roller and the track surface.Type: GrantFiled: July 9, 2004Date of Patent: February 27, 2007Assignee: Hitachi Koki Co., Ltd.Inventors: Toshihiko Tachibana, Yuuichi Satou, Yukio Terunuma
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Patent number: 6893026Abstract: A blade attachment/detachment mechanism for detachably attaching a blade to a saber saw. An end portion of the blade is formed with a blade hole. A reciprocally movable plunger has a blade attachment end portion where a slit and a stepped hole are formed. The slit extends in a longitudinal direction of the blade, and the stepped hole extends in a direction perpendicular to the slit and intersects the slit. An engagement pin is provided in the stepped hole. The engagement pin is engageable with the blade hole to fix the blade to the plunger when the blade end is inserted into the slit. For moving the engagement pin, a knob is pivotally supported to the blade attachment end portion, and a torsion spring is provided to bias the knob in a blade attaching direction. The knob has a slanted surface in engagement with the engagement pin.Type: GrantFiled: January 9, 2003Date of Patent: May 17, 2005Assignee: Hitachi Koki Co., Ltd.Inventors: Kazunobu Yoshimura, Yuuichi Satou, Toshihiko Tachibana
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Patent number: 6873124Abstract: A rotational speed controller maintains a constant low speed during idling, a constant high speed when a load is applied and controls motor rotational speed in the range between low and high speed to ensure safe operation when used in an electrically powered tool. When the current detection signal output from a current detection circuit is lower than a first predetermined value (during idling), a rotational speed setting circuit outputs a rotational speed setting signal indicating a first rotational speed to drive the motor at a constant low speed. When the current detection signal exceeds a second predetermined value (when a load is applied), the rotational speed setting circuit outputs a rotational speed setting signal indicating the second rotational speed to drive the motor at a constant high speed.Type: GrantFiled: December 11, 2003Date of Patent: March 29, 2005Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshikazu Kawano, Nobuhiro Takano, Yuuichi Satou, Toshihiko Tachibana
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Publication number: 20050044729Abstract: A light weight saber saw with reduced numbers of mechanical components and capable of preventing liquid and dust from entering interior of a housing. A plunger reciprocates only in its axial direction in conformity with a longitudinal direction of the housing. A blade holding portion is pivotally movably connected to a front end of the plunger. The blade holding portion includes a plunger chip through which a rear end of a blade is insertable, and a blade holder covering the plunger chip. The blade holder has a track side corresponding to tooth side of the blade, and a track having an inclined track surface is provided at the track side. The housing rotatably supports a roller in rolling contact with the track surface. When the blade is retractingly moved into the housing, the blade holding portion and the blade are pivotally moved totether toward a workpiece by the contact between the roller and the track surface.Type: ApplicationFiled: July 9, 2004Publication date: March 3, 2005Inventors: Toshihiko Tachibana, Yuuichi Satou, Yukio Terunuma
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Publication number: 20040119431Abstract: A rotational speed controller maintains a constant low speed during idling, a constant high speed when a load is applied and controls motor rotational speed in the range between low and high speed to ensure safe operation when used in an electrically powered tool. When the current detection signal output from a current detection circuit is lower than a first predetermined value (during idling), a rotational speed setting circuit outputs a rotational speed setting signal indicating a first rotational speed to drive the motor at a constant low speed. When the current detection signal exceeds a second predetermined value (when a load is applied), the rotational speed setting circuit outputs a rotational speed setting signal indicating the second rotational speed to drive the motor at a constant high speed.Type: ApplicationFiled: December 11, 2003Publication date: June 24, 2004Inventors: Yoshikazu Kawano, Nobuhiro Takano, Yuuichi Satou, Toshihiko Tachibana
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Patent number: 6688005Abstract: A saber saw includes a housing, a plunger supported within the housing and being free to reciprocate, and a swingable guide sleeve provided within the housing and connected with the plunger for imparting a swinging motion to the plunger. In the saber saw, a plunger holding device includes a cylindrical resilient member provided between the guide sleeve and the housing. The resilient member is in fluid-tight contact with the housing.Type: GrantFiled: April 14, 2000Date of Patent: February 10, 2004Assignee: Hitachi Koki Co., Ltd.Inventors: Toshihiko Tachibana, Yoshio Osada
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Patent number: 6662455Abstract: Two different eccentric shaft portions are formed on a secondary shaft. A contact plate has two different contact portions which are selectively brought into contact with two eccentric shaft portions of the secondary shaft. The contact plate is attached to a guide sleeve. A plunger is slidably coupled in the guide sleeve. A saw blade, attached to a front end of the plunger, causes an orbital motion according to a phase difference between two eccentric shaft portions regardless of attached direction (i.e., normal or upside-down) of the saw blade.Type: GrantFiled: February 26, 2002Date of Patent: December 16, 2003Assignee: Hitachi Koki Co., Ltd.Inventors: Toshihiko Tachibana, Yoshio Osada
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Publication number: 20030132581Abstract: A blade attachment/detachment mechanism for detachably attaching a blade to a saber saw. An end portion of the blade is formed with a blade hole. A reciprocally movable plunger has a blade attachment end portion where a slit and a stepped hole are formed. The slit extends in a longitudinal direction of the blade, and the stepped hole extends in a direction perpendicular to the slit and intersects the slit. An engagement pin is provided in the stepped hole. The engagement pin is engageable with the blade hole to fix the blade to the plunger when the blade end is inserted into the slit. For moving the engagement pin, a knob is pivotally supported to the blade attachment end portion, and a torsion spring is provided to bias the knob in a blade attaching direction. The knob has a slanted surface in engagement with the engagement pin.Type: ApplicationFiled: January 9, 2003Publication date: July 17, 2003Applicant: HITACHI KOKI CO., LTD.Inventors: Kazunobu Yoshimura, Yuuichi Satou, Toshihiko Tachibana
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Patent number: D551930Type: GrantFiled: October 10, 2006Date of Patent: October 2, 2007Assignee: Hitachi Koki Co., Ltd.Inventors: Kenichi Yamada, Toshihiko Tachibana, Tomoyuki Kawahara, Masanori Okada, Shinichi Kakefuda