Patents by Inventor Akira Hasebe
Akira Hasebe 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: 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: 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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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
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Patent number: 9309648Abstract: 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, a pump that supplies operating fluid to the steering cylinder via the steering valve, and a return oil passage connected to a tank. 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. The handle prioritization valve includes a throttle arranged in the return oil passage.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
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Patent number: 9309646Abstract: 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. The handle prioritization valve includes a switching valve and a priority control valve switchable between a handle stage and a lever stage.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
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Publication number: 20150259885Abstract: 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: ApplicationFiled: June 1, 2015Publication date: September 17, 2015Inventors: Kota IMANISHI, Hiroyuki CHIKUGO, Shuuji HORI, Mitsumasa AKASHI, Akira HASEBE, Shuki AKUSHICHI, Nobumasa TAKAMATSU
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Publication number: 20150259886Abstract: 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, a pump that supplies operating fluid to the steering cylinder via the steering valve, and a return oil passage connected to a tank. 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. The handle prioritization valve includes a throttle arranged in the return oil passage.Type: ApplicationFiled: June 1, 2015Publication date: September 17, 2015Inventors: Kota IMANISHI, Hiroyuki CHIKUGO, Shuuji HORI, Mitsumasa AKASHI, Akira HASEBE, Shuki AKUSHICHI, Nobumasa TAKAMATSU
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Publication number: 20150259884Abstract: 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. The handle prioritization valve includes a switching valve and a priority control valve switchable between a handle stage and a lever stage.Type: ApplicationFiled: June 1, 2015Publication date: September 17, 2015Inventors: Kota IMANISHI, Hiroyuki CHIKUGO, Shuuji HORI, Mitsumasa AKASHI, Akira HASEBE, Shuki AKUSHICHI, Nobumasa TAKAMATSU
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Patent number: 9085319Abstract: A steering device for a wheel loader includes a rotatable handle, a tiltable lever, a steering cylinder, a steering valve, a pump, a handle control valve, a lever control valve, and a handle prioritization valve. The steering valve controls a supply direction of operating fluid to the steering cylinder with pilot hydraulic pressure. The pump supplies operating fluid to the steering cylinder via the steering valve. The handle and lever control valves supply pilot hydraulic pressure to control the supply direction to the steering valve according to handle rotation and lever tilt, respectively. The handle prioritization valve shuts off the pilot hydraulic pressure supplied from the lever control valve to the steering valve according to a differential pressure or an absolute pressure in a hydraulic circuit produced due to operating fluid flowing through the handle control valve when the handle is operated.Type: GrantFiled: April 19, 2012Date of Patent: July 21, 2015Assignee: KOMATSU LTD.Inventors: Kota Imanishi, Hiroyuki Chikugo, Shuuji Hori, Mitsumasa Akashi, Akira Hasebe, Shuki Akushichi, Nobumasa Takamatsu
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Publication number: 20140083792Abstract: A steering device for a wheel loader includes a rotatable handle, a tiltable lever, a steering cylinder, a steering valve, a pump, a handle control valve, a lever control valve, and a handle prioritization valve. The steering valve controls a supply direction of operating fluid to the steering cylinder with pilot hydraulic pressure. The pump supplies operating fluid to the steering cylinder via the steering valve. The handle and lever control valves supply pilot hydraulic pressure to control the supply direction to the steering valve according to handle rotation and lever tilt, respectively. The handle prioritization valve shuts off the pilot hydraulic pressure supplied from the lever control valve to the steering valve according to a differential pressure or an absolute pressure in a hydraulic circuit produced due to operating fluid flowing through the handle control valve when the handle is operated.Type: ApplicationFiled: April 19, 2012Publication date: March 27, 2014Applicant: KOMATSU LTD.Inventors: Kota Imanishi, Hiroyuki Chikugo, Shuuji Hori, Mitsumasa Akashi, Akira Hasebe, Shuki Akushichi, Nobumasa Takamatsu
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Patent number: 6570007Abstract: The present invention provides three insertion elements and transposases encoded by the insertion elements that are derived from the genome of Ralstonia solanacearum, which has been isolated with a transposon trap vector.Type: GrantFiled: August 16, 2002Date of Patent: May 27, 2003Assignee: National Institute of Agrobiological SciencesInventors: Akira Hasebe, Kenichi Tsuchiya, Mitsuo Horita
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Patent number: 6538125Abstract: The present invention provides three insertion elements and transposases encoded by the insertion elements that are derived from the genome of Ralstonia solanacearum, which has been isolated with a transposon trap vector.Type: GrantFiled: August 16, 2002Date of Patent: March 25, 2003Assignee: National Institute of Agrobiological SciencesInventors: Akira Hasebe, Kenichi Tsuchiya, Mitsuo Horita
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Publication number: 20030027340Abstract: The present invention provides three insertion elements and transposases encoded by the insertion elements that are derived from the genome of Ralstonia solanacearum, which has been isolated with a transposon trap vector.Type: ApplicationFiled: August 16, 2002Publication date: February 6, 2003Inventors: Akira Hasebe, Kenichi Tsuchiya, Mitsuo Horita
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Publication number: 20030009026Abstract: The present invention provides three insertion elements and transposases encoded by the insertion elements that are derived from the genome of Ralstonia solanacearum, which has been isolated with a transposon trap vector.Type: ApplicationFiled: August 16, 2002Publication date: January 9, 2003Inventors: Akira Hasebe, Kenichi Tsuchiya, Mitsuo Horita
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Patent number: 6492510Abstract: The present invention provides three insertion elements and transposases encoded by the insertion elements that are derived from the genome of Ralstonia solanacearum, which has been isolated with a transposon trap vector.Type: GrantFiled: February 21, 2001Date of Patent: December 10, 2002Assignee: National Institute of Agrobiological SciencesInventors: Akira Hasebe, Kenichi Tsuchiya, Mitsuo Horita
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Publication number: 20020052047Abstract: The present invention provides three insertion elements and transposases encoded by the insertion elements that are derived from the genome of Ralstonia solanacearum, which has been isolated with a transposon trap vector.Type: ApplicationFiled: February 21, 2001Publication date: May 2, 2002Inventors: Akira Hasebe, Kenichi Tsuchiya, Mitsuo Horita
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Patent number: 5402473Abstract: On receiving a digital signal from a computer (2), a frequency detector (28) determines a transmitting speed for computer (2). When the computer (2) has an operating frequency of 7.9872 of MHz, a speed other than one of the standardized speeds is selected to implement communication between the computer (2) and the frequency detector (28) at a speed of more than 9600 bps. To do this communication, the frequency detector (28) has a table for obtaining the speed other than one of the standardized speeds.Type: GrantFiled: April 8, 1993Date of Patent: March 28, 1995Assignee: Megasoft, Inc.Inventors: Mamoru Takai, Akira Hasebe