Patents by Inventor Hiroyuki Chikugo
Hiroyuki Chikugo 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: 11953807Abstract: A detection device includes a photographing unit, a first holding portion holding the photographing unit, a magnet having an attracting face facing a flow space in which fluid flows and opposed to the photographing unit via the flow space, a second holding portion holding the magnet, and a connection portion connected to the second holding portion and having an opening portion.Type: GrantFiled: February 26, 2020Date of Patent: April 9, 2024Assignee: Komatsu Ltd.Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
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Patent number: 11501421Abstract: A machine device state monitoring system includes an image data acquisition unit that acquires image data of an inside of a housing chamber in which a mechanical part is housed, an image analysis unit that outputs foreign substance data relating to a foreign substance in oil in the housing chamber based on the image data, a storage unit that stores characteristic data indicating a characteristic of the foreign substance, and an estimation unit that estimates a state of a machine device having the mechanical part based on the foreign substance data and the characteristic data to output estimation data.Type: GrantFiled: April 3, 2019Date of Patent: November 15, 2022Assignee: Komatsu Ltd.Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
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Patent number: 11401700Abstract: A hydraulic oil monitoring system includes an image-data acquiring unit that acquires image data of the oil surface of hydraulic oil stored in a hydraulic oil tank of a work vehicle and an image analyzing unit that outputs, based on the image data, air bubble data relating to air bubbles included in the hydraulic oil.Type: GrantFiled: April 3, 2019Date of Patent: August 2, 2022Assignee: Komatsu Ltd.Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
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Publication number: 20220091485Abstract: A detection device includes a photographing unit, a first holding portion holding the photographing unit, a magnet having an attracting face facing a flow space in which fluid flows and opposed to the photographing unit via the flow space, a second holding portion holding the magnet, and a connection portion connected to the second holding portion and having an opening portion.Type: ApplicationFiled: February 26, 2020Publication date: March 24, 2022Applicant: Komatsu Ltd.Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
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Patent number: 10996164Abstract: An oil state detection device includes an index member, a lighting device that illuminates the index member, and a photographing device that photographs the index member through oil in a machine device.Type: GrantFiled: February 20, 2018Date of Patent: May 4, 2021Assignee: Komatsu Ltd.Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
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Publication number: 20210062476Abstract: A hydraulic oil monitoring system includes an image-data acquiring unit that acquires image data of the oil surface of hydraulic oil stored in a hydraulic oil tank of a work vehicle and an image analyzing unit that outputs, based on the image data, air bubble data relating to air bubbles included in the hydraulic oil.Type: ApplicationFiled: April 3, 2019Publication date: March 4, 2021Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
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Publication number: 20210065352Abstract: A machine device state monitoring system includes an image data acquisition unit that acquires image data of an inside of a housing chamber in which a mechanical part is housed, an image analysis unit that outputs foreign substance data relating to a foreign substance in oil in the housing chamber based on the image data, a storage unit that stores characteristic data indicating a characteristic of the foreign substance, and an estimation unit that estimates a state of a machine device having the mechanical part based on the foreign substance data and the characteristic data to output estimation data.Type: ApplicationFiled: April 3, 2019Publication date: March 4, 2021Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
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Patent number: 10767748Abstract: A mechanical device includes a housing, a transparent spacer member, a magnet, and an image capturing device. The housing has an internal space in which a machine component immersed in oil is housed. The spacer member is disposed in an opening of the housing. The magnet is supported by the spacer member. The image capturing device captures the internal space of the housing via the spacer member.Type: GrantFiled: May 31, 2016Date of Patent: September 8, 2020Assignee: Komatsu Ltd.Inventors: Hiroyuki Chikugo, Shuuji Hori, Mutsumi Ono, Kiyotaka Saitou, Shinya Sano, Takeaki Unno
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Patent number: 10753376Abstract: A hydraulic cylinder spool valve device, which extends and retracts a cylinder rod of a hydraulic cylinder, includes: a first spool valve having a first dead band and a first opening characteristic; a second spool valve having a second dead band and a second opening characteristic; and a controller performing communication with the hydraulic cylinder by using the first spool valve and positioning the second spool of the second spool valve within the second dead band and performing communication with the hydraulic cylinder by using the second spool valve and positioning the first spool of the first spool valve within the first dead band, and adjusting a characteristic of a switching dead band between the first opening characteristic and the second opening characteristic.Type: GrantFiled: January 29, 2016Date of Patent: August 25, 2020Assignee: KOMATSU LTD.Inventors: Shuuji Hori, Masato Kageyama, Mutsumi Ono, Hiroyuki Chikugo, Akira Hasebe, Junichi Fukushima, Shunsuke Koike
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Publication number: 20200232911Abstract: An oil state detection device includes an index member, a lighting device that illuminates the index member, and a photographing device that photographs the index member through oil in a machine device.Type: ApplicationFiled: February 20, 2018Publication date: July 23, 2020Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
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Patent number: 10655514Abstract: In order to be able to easily check the state of foreign matter contained in oil regardless of an installation location, a device main body 10 having a housing chamber 11 in which oil is stored, a plug 20 attached to a bottom portion of the housing chamber 11 in a state where an end surface of a shaft portion 20a faces upward, a spacer member 30 formed by a transparent member and arranged on the plug 20 in such a manner that one end surface 30a faces an inside of the housing chamber 11; and an imaging unit 40 arranged on the plug 20, the imaging unit 40 imaging the inside of the housing chamber 11 via the spacer member 30 are provided.Type: GrantFiled: October 28, 2016Date of Patent: May 19, 2020Assignee: KOMATSU LTD.Inventors: Shuuji Hori, Hiroyuki Chikugo, Mutsumi Ono, Takuya Nohara, Yuta Baba, Toshiyuki Matsumoto
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Patent number: 10391431Abstract: A strainer device includes a strainer element; a first lid member that covers an upper opening of the strainer element; a second lid member that covers a lower opening of the strainer element and has a fitting hole in a portion surrounded by the strainer element; a delivery pipe protruding upward inside a hydraulic oil tank in a state in which the delivery pipe is fitted into the fitting hole of the second lid member; and a check valve arranged at the first lid member. The check valve includes a valve main body having a valve passage whose one end opens to the internal space of the strainer element and whose other end opens to inside of the hydraulic oil tank; and a valve body which is arranged to be able to move in a vertical direction with respect to a valve seat provided in the valve passage.Type: GrantFiled: September 30, 2014Date of Patent: August 27, 2019Assignee: Komatsu Ltd.Inventors: Hiroyuki Chikugo, Shuuji Hori, Yuta Baba
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Publication number: 20190003497Abstract: A hydraulic cylinder spool valve device, which extends and retracts a cylinder rod of a hydraulic cylinder, includes: a first spool valve having a first dead band and a first opening characteristic; a second spool valve having a second dead band and a second opening characteristic; and a controller performing communication with the hydraulic cylinder by using the first spool valve and positioning the second spool of the second spool valve within the second dead band and performing communication with the hydraulic cylinder by using the second spool valve and positioning the first spool of the first spool valve within the first dead band, and adjusting a characteristic of a switching dead band between the first opening characteristic and the second opening characteristic.Type: ApplicationFiled: January 29, 2016Publication date: January 3, 2019Inventors: Shuuji Hori, Masato Kageyama, Mutsumi Ono, Hiroyuki Chikugo, Akira Hasebe, Junichi Fukushima, Shunsuke Koike
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Publication number: 20180296948Abstract: An oil filter includes a filter body including first and second plates stacked to each other, the first plate including a plurality of filtration holes, the second plate including a plurality of passage holes, an inner diameter of the passage holes being greater than an inner diameter of the filtration holes, the filtration holes facing the respective passage holes. Further, the first plate and the second plate are bonded to each other in a manner that a whole area of openings of the filtration holes is arranged within a range of openings of the passage holes.Type: ApplicationFiled: October 30, 2014Publication date: October 18, 2018Inventors: Akira Hasebe, Hiroyuki Chikugo, Shuuji Hori
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Publication number: 20180245490Abstract: In order to be able to easily check the state of foreign matter contained in oil regardless of an installation location, a device main body 10 having a housing chamber 11 in which oil is stored, a plug 20 attached to a bottom portion of the housing chamber 11 in a state where an end surface of a shaft portion 20a faces upward, a spacer member 30 formed by a transparent member and arranged on the plug 20 in such a manner that one end surface 30a faces an inside of the housing chamber 11; and an imaging unit 40 arranged on the plug 20, the imaging unit 40 imaging the inside of the housing chamber 11 via the spacer member 30 are provided.Type: ApplicationFiled: October 28, 2016Publication date: August 30, 2018Inventors: Shuuji Hori, Hiroyuki Chikugo, Mutsumi Ono, Takuya Nohara, Yuta Baba, Toshiyuki Matsumoto
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Publication number: 20180156324Abstract: A mechanical device includes a housing, a transparent spacer member, a magnet, and an image capturing device. The housing has an internal space in which a machine component immersed in oil is housed. The spacer member is disposed in an opening of the housing. The magnet is supported by the spacer member. The image capturing device captures the internal space of the housing via the spacer member.Type: ApplicationFiled: May 31, 2016Publication date: June 7, 2018Inventors: Hiroyuki Chikugo, Shuuji Hori, Mutsumi Ono, Kiyotaka Saitou, Shinya Sano, Takeaki Unno
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Publication number: 20170296947Abstract: A strainer device includes a strainer element; a first lid member that covers an upper opening of the strainer element; a second lid member that covers a lower opening of the strainer element and has a fitting hole in a portion surrounded by the strainer element; a delivery pipe protruding upward inside a hydraulic oil tank in a state in which the delivery pipe is fitted into the fitting hole of the second lid member; and a check valve arranged at the first lid member. The check valve includes a valve main body having a valve passage whose one end opens to the internal space of the strainer element and whose other end opens to inside of the hydraulic oil tank; and a valve body which is arranged to be able to move in a vertical direction with respect to a valve seat provided in the valve passage.Type: ApplicationFiled: September 30, 2014Publication date: October 19, 2017Inventors: Hiroyuki Chikugo, Shuuji Hori, Yuta Baba
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Patent number: 9599225Abstract: A blocking configuration of an oil pressure circuit hole includes a plug screwed together with an aperture end portion of the oil pressure circuit hole provided to a main body. The plug includes: a shaft portion; an external thread portion disposed on a leading end of the shaft portion; an O-ring mounted on an outer periphery of a base end portion of the shaft portion and pressed between the outer periphery of the shaft portion and an inner periphery of the oil pressure circuit hole to seal them; a flange portion having an external diameter larger than that of the shaft portion and disposed on a part of a base end side of a storage groove on which the O-ring is mounted; and a polygonal column-shaped head portion on which a tightening tool is mounted and disposed on a part of a base end side of the flange portion.Type: GrantFiled: January 7, 2014Date of Patent: March 21, 2017Assignee: Komatsu Ltd.Inventors: Takuya Nohara, Hiroyuki Chikugo, Shuuji Hori, Mitsumasa Akashi
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Publication number: 20160245408Abstract: A blocking configuration of an oil pressure circuit hole includes a plug screwed together with an aperture end portion of the oil pressure circuit hole provided to a main body. The plug includes: a shaft portion; an external thread portion disposed on a leading end of the shaft portion; an O-ring mounted on an outer periphery of a base end portion of the shaft portion and pressed between the outer periphery of the shaft portion and an inner periphery of the oil pressure circuit hole to seal them; a flange portion having an external diameter larger than that of the shaft portion and disposed on a part of a base end side of a storage groove on which the O-ring is mounted; and a polygonal column-shaped head portion on which a tightening tool is mounted and disposed on a part of a base end side of the flange portion.Type: ApplicationFiled: January 7, 2014Publication date: August 25, 2016Applicant: KOMATSU LTD.Inventors: Takuya Nohara, Hiroyuki Chikugo, Shuuji Hori, Mitsumasa Akashi
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Patent number: 9309647Abstract: A steering device for a wheel loader includes a handle for steering, a lever for steering, a steering cylinder, a steering valve that controls a direction of operating fluid to the steering cylinder, and a pump that supplies operating fluid to the steering cylinder via the steering valve. The steering device further includes a handle control valve that controls the supply direction of the operating fluid according the handle, a lever electromagnetic control valve that controls the supply direction of operating fluid according to the lever, and a handle prioritization valve that shuts off a pilot hydraulic pressure supplied from the lever electromagnetic control valve to the steering valve according to a pressure produced by operating fluid flowing through the handle control valve when the handle is operated. Communication between the lever electromagnetic control valve and the steering valve is allowed when only the lever electromagnetic control valve is operated.Type: GrantFiled: June 1, 2015Date of Patent: April 12, 2016Assignee: KOMATSU LTD.Inventors: Kota Imanishi, Hiroyuki Chikugo, Shuuji Hori, Mitsumasa Akashi, Akira Hasebe, Shuki Akushichi, Nobumasa Takamatsu