Patents by Inventor Toshiharu Ohashi
Toshiharu Ohashi 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: 9701000Abstract: An impact rotation tool including a drive source, an impact force generation unit that generates an impact force for converting power from the drive source to pulsed torque, a shaft that transmits the pulsed torque to a bit used to perform a tightening task, a torque measurement unit that measures torque applied to the shaft as measured torque, a rotation angle measurement unit that measures a rotation angle of the shaft, a tightening torque calculation unit that calculates an angular acceleration from the rotation angle to calculate a tightening torque based on the angular acceleration and the measured torque, and a controller that controls the drive source based on the tightening torque.Type: GrantFiled: July 16, 2014Date of Patent: July 11, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Fumiaki Sekino, Kenichirou Inagaki, Toshiharu Ohashi, Tadashi Arimura, Ryuji Otani, Mitsumasa Mizuno
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Patent number: 9687972Abstract: An impact rotation tool includes a drive source that generates power. An impact force generation unit generates impact force by changing the power generated by the drive source to pulsed torque. A shaft transmits the pulsed torque to the distal tool with the generated impact force. A torque detector generates a signal corresponding to the torque applied to the shaft. A determination unit determines whether or not a torque value obtained from a signal corresponding to the torque has reached a predetermined torque value. A control unit controls the drive source to a predetermined driving state when the determination unit determines that the torque value has reached the predetermined torque value. The determination unit is arranged on the shaft.Type: GrantFiled: October 8, 2013Date of Patent: June 27, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Fumiaki Sekino, Toshiharu Ohashi, Tadashi Arimura, Kenichirou Inagaki
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Patent number: 9579776Abstract: An electric power tool includes a voltage step-up condition setting operation unit that serves as a human machine interface and a voltage converter capable of performing a voltage step-up operation to raise a voltage supplied from a power supply and supply a raised voltage to a motor. The voltage converter is further capable of changing a voltage step-up level in the voltage step-up operation in accordance with the operation of the voltage step-up condition setting operation unit. A driving state detection unit generates a driving state signal corresponding to a driving state of the electric power tool. A control unit controls a stop timing of the motor in accordance with the driving state signal.Type: GrantFiled: March 10, 2014Date of Patent: February 28, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tadashi Arimura, Toshiharu Ohashi, Hiroyuki Kaizo, Fumiaki Sekino, Kenichirou Inagaki
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Patent number: 9472969Abstract: An adapter includes a converter unit which increases at least one of voltage and current outputted from a battery pack and supply the increased the voltage and/or the current to a load, and a characteristic detection unit which detects at least one of the voltage outputted from the battery pack, the current outputted from the battery pack, a temperature of the battery pack, a voltage inputted to the load, a current inputted to the load and a temperature of the converter unit. The adapter further includes a control unit configured to control the converter unit to increase each of said at least one of the voltage and the current outputted from the battery pack to a corresponding reference value and perform a control operation of suppressing such increase to prevent an occurrence of over-current or over-discharge based on at least one detection result.Type: GrantFiled: August 8, 2013Date of Patent: October 18, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Hiroyuki Kaizo, Tadashi Arimura, Toshiharu Ohashi
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Patent number: 9427852Abstract: A rotary impact tool comprises: a motor that is a rotation driving source; an impact generation device for generating a pulse impact by rotation of the motor and applying a rotational torque to an output shaft by the impact; a torque sensor for measuring the torque applied to the output shaft; and a control means for halting the motor when the torque measured by the torque sensor has reached a target torque having been set. The control means is configured to change an increased torque value for one impact according to the target torque having been set.Type: GrantFiled: August 8, 2011Date of Patent: August 30, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Mitsumasa Mizuno, Toshiharu Ohashi
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Patent number: 9270211Abstract: An electric power tool includes a power supply, a motor capable of being driven in a forward rotation mode or a reverse rotation mode, and a voltage step-up unit capable of performing a voltage step-up operation to raise a voltage supplied from the power supply and supply a raised voltage to the motor. The voltage step-up unit is configured to change the voltage step-up operation in accordance with whether a rotation mode of the motor is the forward rotation mode or the reverse rotation mode.Type: GrantFiled: March 7, 2014Date of Patent: February 23, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Hiroyuki Kaizo, Tadashi Arimura, Toshiharu Ohashi
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Patent number: 9178380Abstract: A charger includes an output circuit unit to output a charging current to a secondary battery, a voltage detection unit to detect a voltage of the secondary battery, and a control unit to control the output circuit unit, whereby constant current charging and constant voltage charging are performed. The control unit decreases a constant current value of the charging current by stages during the constant current charging and determines that the secondary battery has deteriorated by using a first voltage drop value of the secondary battery occurring upon first conversion and a second voltage drop value of the secondary battery occurring upon second conversion.Type: GrantFiled: September 7, 2012Date of Patent: November 3, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akira Kawai, Masaki Ikeda, Masaaki Sakaue, Toshiharu Ohashi
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Patent number: 9089956Abstract: An impact power tool includes an impact mechanism for applying a striking impact to an output shaft by using an output power of a motor. A strike detection unit detects the striking impact applied by the impact mechanism to obtain a striking timing and a striking speed detection unit calculates a striking speed from the striking timing obtained by the strike detection unit and a rotation angle of the motor obtained by a rotation angle detection unit. A control unit counts the number of striking impact detected by the strike detection unit and stops the motor if the number of striking impact reaches a predetermined strike number. The control unit is designed to correct the predetermined strike number when the striking speed obtained in the striking speed detection unit is equal to or lower than a specified striking speed.Type: GrantFiled: September 12, 2008Date of Patent: July 28, 2015Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tadashi Arimura, Mitsumasa Mizuno, Toshiharu Ohashi, Masaaki Sakaue
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Patent number: 9088239Abstract: A voltage increasing control circuit is connected to a power supply to regulate power supplied to a load. The voltage increasing control circuit includes a voltage increasing unit configured to increase voltage that is supplied from the power supply, and supply the voltage to the load. A power estimation unit determines whether or not to increase the power supplied to the load. A voltage control unit controls the voltage increasing unit. When the power estimation unit determines to increase the power supplied to the load, the voltage control unit controls the voltage increasing unit to increase the power supplied to the load.Type: GrantFiled: July 8, 2013Date of Patent: July 21, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Hiroyuki Kaizo, Toshiharu Ohashi, Tadashi Arimura
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Publication number: 20150021062Abstract: An impact rotation tool including a drive source, an impact force generation unit that generates an impact force for converting power from the drive source to pulsed torque, a shaft that transmits the pulsed torque to a bit used to perform a tightening task, a torque measurement unit that measures torque applied to the shaft as measured torque, a rotation angle measurement unit that measures a rotation angle of the shaft, a tightening torque calculation unit that calculates an angular acceleration from the rotation angle to calculate a tightening torque based on the angular acceleration and the measured torque, and a controller that controls the drive source based on the tightening torque.Type: ApplicationFiled: July 16, 2014Publication date: January 22, 2015Inventors: Fumiaki SEKINO, Kenichirou INAGAKI, Toshiharu OHASHI, Tadashi ARIMURA, Ryuji OTANI, Mitsumasa MIZUNO
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Publication number: 20140265948Abstract: An electric power tool includes a power supply, a motor capable of being driven in a forward rotation mode or a reverse rotation mode, and a voltage step-up unit capable of performing a voltage step-up operation to raise a voltage supplied from the power supply and supply a raised voltage to the motor. The voltage step-up unit is configured to change the voltage step-up operation in accordance with whether a rotation mode of the motor is the forward rotation mode or the reverse rotation mode.Type: ApplicationFiled: March 7, 2014Publication date: September 18, 2014Applicant: Panasonic CorporationInventors: Hiroyuki KAIZO, Tadashi ARIMURA, Toshiharu OHASHI
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Publication number: 20140262390Abstract: An electric power tool includes a voltage step-up condition setting operation unit that serves as a human machine interface and a voltage converter capable of performing a voltage step-up operation to raise a voltage supplied from a power supply and supply a raised voltage to a motor. The voltage converter is further capable of changing a voltage step-up level in the voltage step-up operation in accordance with the operation of the voltage step-up condition setting operation unit. A driving state detection unit generates a driving state signal corresponding to a driving state of the electric power tool. A control unit controls a stop timing of the motor in accordance with the driving state signal.Type: ApplicationFiled: March 10, 2014Publication date: September 18, 2014Applicant: Panasonic CorporationInventors: Tadashi ARIMURA, Toshiharu OHASHI, Hiroyuki KAIZO, Fumiaki SEKINO, Kenichirou INAGAKI
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Publication number: 20140102741Abstract: An impact rotation tool includes a drive source that generates power. An impact force generation unit generates impact force by changing the power generated by the drive source to pulsed torque. A shaft transmits the pulsed torque to the distal tool with the generated impact force. A torque detector generates a signal corresponding to the torque applied to the shaft. A determination unit determines whether or not a torque value obtained from a signal corresponding to the torque has reached a predetermined torque value. A control unit controls the drive source to a predetermined driving state when the determination unit determines that the torque value has reached the predetermined torque value. The determination unit is arranged on the shaft.Type: ApplicationFiled: October 8, 2013Publication date: April 17, 2014Applicant: PANASONIC CORPORATIONInventors: Fumiaki SEKINO, Toshiharu OHASHI, Tadashi ARIMURA, Kenichirou INAGAKI
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Publication number: 20140042981Abstract: An adapter includes a converter unit which increases at least one of voltage and current outputted from a battery pack and supply the increased the voltage and/or the current to a load, and a characteristic detection unit which detects at least one of the voltage outputted from the battery pack, the current outputted from the battery pack, a temperature of the battery pack, a voltage inputted to the load, a current inputted to the load and a temperature of the converter unit. The adapter further includes a control unit configured to control the converter unit to increase each of said at least one of the voltage and the current outputted from the battery pack to a corresponding reference value and perform a control operation of suppressing such increase to prevent an occurrence of over-current or over-discharge based on at least one detection result.Type: ApplicationFiled: August 8, 2013Publication date: February 13, 2014Applicant: Panasonic CorporationInventors: Hiroyuki KAIZO, Tadashi ARIMURA, Toshiharu OHASHI
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Publication number: 20140015465Abstract: A voltage increasing control circuit is connected to a power supply to regulate power supplied to a load. The voltage increasing control circuit includes a voltage increasing unit configured to increase voltage that is supplied from the power supply, and supply the voltage to the load. A power estimation unit determines whether or not to increase the power supplied to the load. A voltage control unit controls the voltage increasing unit. When the power estimation unit determines to increase the power supplied to the load, the voltage control unit controls the voltage increasing unit to increase the power supplied to the load.Type: ApplicationFiled: July 8, 2013Publication date: January 16, 2014Inventors: Hiroyuki KAIZO, Toshiharu OHASHI, Tadashi ARIMURA
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Publication number: 20130133912Abstract: A rotary impact tool comprises: a motor that is a rotation driving source; an impact generation device for generating a pulse impact by rotation of the motor and applying a rotational torque to an output shaft by the impact; a torque sensor for measuring the torque applied to the output shaft; and a control means for halting the motor when the torque measured by the torque sensor has reached a target torque having been set. The control means is configured to change an increased torque value for one impact according to the target torque having been set.Type: ApplicationFiled: August 8, 2011Publication date: May 30, 2013Applicant: PANASONIC CORPORATIONInventors: Mitsumasa Mizuno, Toshiharu Ohashi
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Publication number: 20130063079Abstract: A charger includes an output circuit unit to output a charging current to a secondary battery, a voltage detection unit to detect a voltage of the secondary battery, and a control unit to control the output circuit unit, whereby constant current charging and constant voltage charging are performed. The control unit decreases a constant current value of the charging current by stages during the constant current charging and determines that the secondary battery has deteriorated by using a first voltage drop value of the secondary battery occurring upon first conversion and a second voltage drop value of the secondary battery occurring upon second conversion.Type: ApplicationFiled: September 7, 2012Publication date: March 14, 2013Applicant: PANASONIC CORPORATIONInventors: Akira KAWAI, Masaki IKEDA, Masaaki SAKAUE, Toshiharu OHASHI
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Patent number: 7843165Abstract: A charging device for charging battery packs includes charging terminals including a first charging terminal to be connected to an electrode of a first battery pack and a second charging terminal to be connected to an electrode of a second battery pack. Here, the first and the second battery pack are different in kind. Further, the charging device includes a conversion unit for supplying electricity to the first charging terminal when the electrode of the first battery pack is connected to the first charging terminal and supplying electricity to the second charging terminal when the electrode of the second battery pack is connected to the second charging terminal.Type: GrantFiled: February 27, 2007Date of Patent: November 30, 2010Assignee: Panasonic Electric Works Co., Ltd.Inventors: Masaaki Sakaue, Toshiharu Ohashi
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Patent number: 7692408Abstract: A charging device for use in charging plural types of secondary batteries includes a power source unit for supplying a charging current to an object secondary battery, a battery type signal receiving unit for receiving a battery type signal, a battery temperature signal receiving unit for receiving a battery temperature signal, a blowing unit for blowing an air to the secondary battery, a storage unit for storing reference judging temperatures for determination of charging-incongruent temperatures of the plural types of secondary batteries, in a matching relationship with the types of the secondary batteries, and a control unit. The control unit allows the blowing unit to perform a blowing operation, if the temperature of the secondary battery exceeds a reference judging temperature, and to stop the blowing operation, if otherwise.Type: GrantFiled: March 28, 2006Date of Patent: April 6, 2010Assignee: Panasonic Electric Works Co., Ltd.Inventors: Hiroshi Miyazaki, Toshiharu Ohashi, Masatoshi Ito
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Patent number: 7659692Abstract: A battery pack for a power tool of self-contained over-charge protection is proposed. The battery pack includes a battery stack composed of a plurality of series connected secondary cells, and a charge terminal connected through a charge current path to the battery stack for flowing a charge current from a charger. The battery pack includes an interrupter inserted in the charge current path, and an over-charge detector which detects a cell voltage across each of the secondary cells and actuates the interrupter to open the charge current path when any one of the cell voltages becomes higher than a predetermined threshold (VTH3). Thus, even if the charger fails to limit the charge current, the battery pack can itself protect the secondary cells from being over-charged.Type: GrantFiled: November 15, 2006Date of Patent: February 9, 2010Assignee: Panasonic Electric Works Co., Ltd.Inventors: Yoshinori Sainomoto, Toshiharu Ohashi, Hiroshi Miyazaki