Patents by Inventor Miyoji Onose
Miyoji Onose 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: 9486867Abstract: A chainsaw having improved cutting workability is provided. A chainsaw is used to cut an object to be worked by a saw chain. A chainsaw main body is provided with an electric motor and a sprocket, and a guide bar around which the saw chain is wound is provided on the chainsaw main body. The guide bar is attached to the chainsaw main body by a screw member serving as an attaching member. A load sensor detects whether or not the guide bar is attached to the chainsaw main body. Rotation of the saw chain is prohibited based upon a signal from the load sensor when the guide bar is not attached to the chainsaw main body.Type: GrantFiled: December 25, 2012Date of Patent: November 8, 2016Assignee: HITACHI KOKI CO., LTD.Inventors: Yasuo Etou, Satoru Matsuno, Kouji Sagawa, Miyoji Onose, Yasutaka Shimizu, Ai 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: 9381665Abstract: A chainsaw in which a remaining amount of chain oil to be supplied to a saw chain can be easily checked is provided. In a chainsaw 1 including: a saw chain 6 driven by a motor embedded in a main body; and an oil tank 11 in which the chain oil to be supplied to the saw chain 6 in wood cutting process is stored, an illumination unit (LED 15) is provided in vicinity of the oil tank 11. In this manner, the chain oil of the oil tank 11 positioned on a left side of the LED 15 can be illuminated. This illumination unit is configured to be used also as an illuminating device for illuminating the vicinity of the saw chain 6, that is, an area indicated by dotted lines from 21c to 21d. According to the present invention, in a dark location, the remaining amount of the chain oil can be checked, and besides, a positional relationship among the chainsaw 1 main body, the saw chain 6, and the periphery thereof can be easily visually checked, so that the working efficiency can be improved.Type: GrantFiled: February 12, 2013Date of Patent: July 5, 2016Assignee: HITACHI KOKI CO., LTD.Inventors: Miyoji Onose, Kouji Sagawa, Satoru Matsuno, Yasuo Etou, Ai Nakayama, Yasutaka Shimizu
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Patent number: 9337763Abstract: A power tool system includes: a power tool including an AC motor; a portable battery pack; and a power supply device that converts a DC power supplied from the portable battery pack into an AC power to supply the AC power to the AC motor.Type: GrantFiled: October 26, 2011Date of Patent: May 10, 2016Assignee: Hitachi Koki Co., Ltd.Inventors: Kazuhiko Funabashi, Nobuhiro Takano, Yoshikazu Kawano, Yasushi Nakano, Yuki Horie, Shinji Watanabe, Miyoji Onose, Haruhisa Fujisawa
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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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Publication number: 20150321377Abstract: A chainsaw in which a remaining amount of chain oil to be supplied to a saw chain can be easily checked is provided. In a chainsaw 1 including: a saw chain 6 driven by a motor embedded in a main body; and an oil tank 11 in which the chain oil to be supplied to the saw chain 6 in wood cutting process is stored, an illumination unit (LED 15) is provided in vicinity of the oil tank 11. In this manner, the chain oil of the oil tank 11 positioned on a left side of the LED 15 can be illuminated. This illumination unit is configured to be used also as an illuminating device for illuminating the vicinity of the saw chain 6, that is, an area indicated by dotted lines from 21c to 21d. According to the present invention, in a dark location, the remaining amount of the chain oil can be checked, and besides, a positional relationship among the chainsaw 1 main body, the saw chain 6, and the periphery thereof can be easily visually checked, so that the working efficiency can be improved.Type: ApplicationFiled: February 12, 2013Publication date: November 12, 2015Inventors: Miyoji ONOSE, Kouji SAGAWA, Satoru MATSUNO, Yasuo ETOU, Ai NAKAYAMA, Yasutaka SHIMIZU
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Patent number: 9044875Abstract: A chain saw includes: a motor driven by electric power; a housing configured to accommodate the motor; a guide bar attached to the housing; a chain blade wound around the guide bar; a sprocket engaged with the chain blade to drive the chain blade, wherein the chain saw is configured to transmit a driving force of the motor to the sprocket via a clutch mechanism, wherein the chain saw comprises a shut-off switch for detecting an actuation of the clutch mechanism and is configured such that the power supply to the motor is stopped when the actuation of the clutch mechanism is detected by the shut-off switch so as to brake electrically. The electrical brake is provided together with a mechanical brake that is configured to work when a hand guard is rotated.Type: GrantFiled: January 11, 2013Date of Patent: June 2, 2015Assignee: HITACHI KOKI CO., LTD.Inventors: Yasutaka Shimizu, Kouji Sagawa, Satoru Matsuno, Yasuo Etou, Ai Nakayama, Miyoji Onose
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Publication number: 20140345149Abstract: A chainsaw having improved cutting workability is provided. A chainsaw is used to cut an object to be worked by a saw chain. A chainsaw main body is provided with an electric motor and a sprocket, and a guide bar around which the saw chain is wound is provided on the chainsaw main body. The guide bar is attached to the chainsaw main body by a screw member serving as an attaching member. A load sensor detects whether or not the guide bar is attached to the chainsaw main body. Rotation of the saw chain is prohibited based upon a signal from the load sensor when the guide bar is not attached to the chainsaw main body.Type: ApplicationFiled: December 25, 2012Publication date: November 27, 2014Inventors: Yasuo Etou, Satoru Matsuno, Kouji Sagawa, Miyoji Onose, Yasutaka Shimizu, Ai Nakayama
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Publication number: 20140047722Abstract: A chain saw has a drive shaft which drives the saw chain, an electric motor which imparts a rotational force to the drive shaft, a main body housing which incorporates the electric motor, a battery which is detachably attached to the main body housing, a battery guard which supports a bottom surface of the battery, and a hook which is provided in a hook accommodating portion on a bottom surface side of the battery guard so as to be freely drawn out to the rear. A pillar-like portion is formed within the battery guard in a position lying further forwards than the hook accommodating portion, and bent-back portions of the hook are brought into engagement with the pillar-like portion.Type: ApplicationFiled: August 13, 2013Publication date: February 20, 2014Applicant: HITACHI KOKI CO., LTD.Inventors: Miyoji Onose, Ai Nakayama, Seiichi Kodato, Kouji Sagawa, Shinichi Kakefuda
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Publication number: 20140015451Abstract: A power tool system includes: a power tool including an AC motor; a portable battery pack; and a power supply device that converts a DC power supplied from the portable battery pack into an AC power to supply the AC power to the AC motor.Type: ApplicationFiled: October 26, 2011Publication date: January 16, 2014Applicant: Hitachi Koki Co. Ltd.Inventors: Kazuhiko Funabashi, Nobuhiro Takano, Yoshikazu Kawano, Yasushi Nakano, Yuki Horie née Nitanai, Shinji Watanabe, Miyoji Onose, Haruhisa Fujisawa
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Publication number: 20130285476Abstract: A power supply device includes: a battery pack; a transforming unit configured to transform a DC voltage supplied from the battery pack; and a control unit configured to determine, based on a characteristic of the battery pack, whether or not the converting unit performs an outputting operation.Type: ApplicationFiled: January 16, 2012Publication date: October 31, 2013Applicant: HITACHI KOKI CO LTDInventors: Yasushi Nakano, Kazuhiko Funabashi, Yoshikazu Kawano, Shinji Watanabe, Miyoji Onose, Haruhisa Fujisawa
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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: 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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Patent number: 8186067Abstract: A portable circular saw includes a housing, including a motor, a circular saw blade, a saw cover, and a light irradiation unit. The blade is driven by the motor for cutting in a cutting direction. The circular saw blade has one side surface and another side surface. The saw cover is provided to the housing for partially covering the circular saw blade. The light irradiation unit is provided on the saw cover. The light irradiation unit includes a first irradiation device located on the one side surface side of the blade and a second irradiation device located on the another side surface side of the blade for emitting a light to illuminate a region including a leading end portion of the circular saw blade and a spot on the cutting object. The spot is ahead of the leading end portion in the cutting direction.Type: GrantFiled: February 22, 2007Date of Patent: May 29, 2012Assignee: Hitachi Koki Co., Ltd.Inventors: Miyoji Onose, Hideaki Terashima, Shinji Takano
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Publication number: 20120024552Abstract: An electrical power tool includes a motor, a load detecting unit, a trigger switch, and a power supplying unit. The load detecting unit detects a load applied to the motor. The trigger switch receives an instruction. The power supplying unit starts supplying of a driving electrical power to the motor when the trigger switch receives the instruction. The power supplying unit changes an amount of the driving electrical power based on the load detected by the load detecting unit.Type: ApplicationFiled: July 15, 2011Publication date: February 2, 2012Applicant: Hitachi Koki Co., Ltd.Inventors: Yoshikazu Kawano, Nobuhiro Takano, Kazuhiko Funabashi, Kenro Ishimaru, Yasuo Etou, Miyoji Onose
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Publication number: 20110154796Abstract: An electric hedge trimmer comprises a flat motor that is provided inside a housing and includes a rotor having a disk shaped coil disk on which a plurality of substantially ring-shaped coils are formed and arranged in the circumferential direction a motor output shaft as seen in the direction of the axis line of the motor output shaft, a magnet that generates a magnetic flux that passes through the coil disk in the direction of the axis line of the motor output shaft, a gear section that reduces the speed of rotation of the motor output shaft and has a gear section output shaft that outputs the reduced rotation, a cam that is connected to the gear section output shaft, converts the rotating motion of the gear section output shaft to reciprocating motion, and a blade section that is connected to the cam and has reciprocating motion.Type: ApplicationFiled: December 28, 2010Publication date: June 30, 2011Inventor: Miyoji ONOSE
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Publication number: 20070193039Abstract: A portable circular saw includes a housing, a motor, a circular saw blade, a saw cover, and a light irradiation unit. The motor is accommodated in the housing. The circular saw blade is driven by the motor for cutting a cutting object in a cutting direction. The circular saw blade has one side surface and another side surface. The saw cover is provided to the housing for partially covering the circular saw blade. The light irradiation unit is provided on the saw cover. The light irradiation unit includes a first irradiation device located on the one side surface side of the circular saw blade and a second irradiation device located on the another side surface side of the circular saw blade for emitting a light to illuminate a region including a leading end portion of the circular saw blade and a spot on the cutting object. The spot is ahead of the leading end portion in the cutting direction.Type: ApplicationFiled: February 22, 2007Publication date: August 23, 2007Inventors: Miyoji ONOSE, Hideaki Terashima, Shinji Takano
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Patent number: D655245Type: GrantFiled: February 17, 2011Date of Patent: March 6, 2012Assignee: Hitachi Koki Co., LtdInventors: Takafumi Itoh, Masanori Okada, Miyoji Onose
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Patent number: D701102Type: GrantFiled: February 8, 2013Date of Patent: March 18, 2014Assignee: Hitachi Koki Co., Ltd.Inventors: Takafumi Itoh, Shinichi Kakefuda, Masanori Okada, Miyoji Onose