Patents by Inventor Katsumi Yanagihara
Katsumi Yanagihara 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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Publication number: 20240155962Abstract: A tractor includes a hydraulic lifting and lowering driver to lift and lower a three-point linkage, a load detector to swing according to a traction load of an implement, and a mechanical linkage to transmit a swing amount of the load detector to the lifting and lowering driver. The mechanical linkage includes a first linkage on one side in a right-left direction of a vehicle body frame and interlockingly linked with the load detector, a second linkage on the other side in the right-left direction of the vehicle body frame and interlockingly linked with the lifting and lowering driver, and an operation cable interlockingly linking the first linkage and the second linkage.Type: ApplicationFiled: January 23, 2024Publication date: May 16, 2024Inventors: Takashi SAWAI, Norita TOTTORI, Katsumi YANAGIHARA, Kazuya KIYAMA, Hiroyuki KAWAMURA, Shinichiro MINAMI, Ryo KUMAI, Mami FUJII
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Publication number: 20230202290Abstract: A work machine includes an exhaust pipe and an outside air mixing cylinder including a guiding cylinder section and an expanding cylinder section, the guiding cylinder section including an exhaust gas guide path to guide exhaust gas from a downstream end of the exhaust pipe in a discharge direction of the exhaust pipe, the expanding cylinder section including a structure with a cross-sectional area of a flow path thereof that becomes larger in diameter to cause a Coanda effect on the exhaust gas so that the exhaust gas follows an inner surface of the expanding cylinder section.Type: ApplicationFiled: November 30, 2022Publication date: June 29, 2023Inventors: Ryosuke TANAKA, Naoya OKAMOTO, Katsumi YANAGIHARA, Nobuki DAIMON, Yuta TSUJIMOTO
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Publication number: 20230000002Abstract: A tractor includes a three-point link mechanism to which a work apparatus to be attached so as to be able to move upward and downward, a hydraulic drive to perform a swing operation to swing the three-point link mechanism, a load receiver to swing in response to a tow load being applied from the work apparatus when the work apparatus performs ground work while being towed by the vehicle body, and a link mechanism to transmit an amount of operation for the swing operation to the hydraulic drive according to an amount of swing of the load receiver. The link mechanism includes, at a most upstream position, an interlocking swing arm to swing in conjunction with the swing of the load receiver about a swing axis that is different from a swing axis of the load receiver, the load receiver includes a first portion to press the interlocking swing arm that includes a second portion contactable with the first portion so to be pressed by the first portion, and a contact position of the first and the second portions.Type: ApplicationFiled: September 4, 2020Publication date: January 5, 2023Inventor: Katsumi YANAGIHARA
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Publication number: 20220225556Abstract: A tractor includes: a three-point linkage to which a tiller is mountable a hydraulic lifting/lowering driver to lift and lower the three-point linkage, and a mechanical linkage to transmit a lifting/lowering operation amount of the three-point linkage to the lifting/lowering driver. The mechanical linkage includes a load detector to detect an amount of change in traction load via the three-point linkage, a cable to interlock according to the amount of change in the traction load detected by the load detector, and a mechanical linkage interlocked and connected to the cable and the lifting/lowering driver, the mechanical linkage being capable of transmitting the lifting/lowering operation amount according to the amount of change in the traction load to the lifting/lowering driver.Type: ApplicationFiled: May 29, 2020Publication date: July 21, 2022Inventors: Daisuke NAKAYAMA, Hironobu NOGAMI, Norihide IWATA, Katsumi YANAGIHARA, Naoto MANTOKU, Keita ONO
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Patent number: 8905182Abstract: A board-like division member is provided that extends in a vehicle body transverse direction so as to divide a portion of the engine room into an upper region and a lower region along in an engine room height direction. An engine is mounted downwardly of the division member. An exhaust treatment apparatus is mounted upwardly of the division member for treating exhaust gas from the engine. An air discharge portion is formed in a lateral face region of the hood which corresponds to a position of the division member in the engine room height direction. Air present inside the engine room is discharged to the outside through this air discharge portion.Type: GrantFiled: March 6, 2013Date of Patent: December 9, 2014Assignee: Kubota CorporationInventors: Koji Masumoto, Katsumi Yanagihara, Makoto Kubota
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Publication number: 20140020972Abstract: A board-like division member is provided that extends in a vehicle body transverse direction so as to divide a portion of the engine room into an upper region and a lower region along in an engine room height direction. An engine is mounted downwardly of the division member. An exhaust treatment apparatus is mounted upwardly of the division member for treating exhaust gas from the engine. An air discharge portion is formed in a lateral face region of the hood which corresponds to a position of the division member in the engine room height direction. Air present inside the engine room is discharged to the outside through this air discharge portion.Type: ApplicationFiled: March 6, 2013Publication date: January 23, 2014Applicant: KUBOTA CORPORATIONInventors: Koji Masumoto, Katsumi Yanagihara, Makoto Kubota
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Patent number: 7648001Abstract: A work vehicle comprises a plurality of wheels; a propelling speed change device supported by the plurality of wheels and having at least one forward travel position and a reverse travel position with substantially the same speed reduction ratio as the forward travel position; a steering wheel for steering at least one of the plurality of wheels; a steering wheel support shaft for supporting the steering wheel; a speed change lever located in a position laterally of the steering wheel support shaft and operatively connected to the propelling speed change device to operate the propelling speed change device; a speed change lever guide for guiding the speed change lever, the guide including: a plurality of fore and aft channels extending substantially in the fore and aft direction of the work vehicle; a communication channel extending between the plurality of fore and aft channels; wherein one of the plurality of the fore and aft channels has a first lever position corresponding to the forward travel position aType: GrantFiled: August 24, 2006Date of Patent: January 19, 2010Assignee: Kubota CorporationInventors: Katsumi Yanagihara, Shigeo Shoen, Kenkichi Hirakawa, Takahiro Komine, Tadashi Nakamura
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Publication number: 20070056793Abstract: A work vehicle comprises a plurality of wheels; a propelling speed change device supported by the plurality of wheels and having at least one forward travel position and a reverse travel position with substantially the same speed reduction ratio as the forward travel position; a steering wheel for steering at least one of the plurality of wheels; a steering wheel support shaft for supporting the steering wheel; a speed change lever located in a position laterally of the steering wheel support shaft and operatively connected to the propelling speed change device to operate the propelling speed change device; a speed change lever guide for guiding the speed change lever, the guide including: a plurality of fore and aft channels extending substantially in the fore and aft direction of the work vehicle; a communication channel extending between the plurality of fore and aft channels; wherein one of the plurality of the fore and aft channels has a first lever position corresponding to the forward travel position aType: ApplicationFiled: August 24, 2006Publication date: March 15, 2007Applicant: Kubota CorporationInventors: Katsumi Yanagihara, Shigeo Shoen, Kenkichi Hirakawa, Takahiro Komine, Tadashi Nakamura
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Patent number: 6752228Abstract: A tractor with a cab disposed rearwardly of a hood, the cab being mounted on a tractor body (T) including a body forming unit, the cab including a bottom wall defining left and right footrests. The cab has a total length larger than a total height thereof. The cab is arranged to have the footrests substantially level with a lower end of the body forming unit. The cab has an intermediate height level (x) lower than a height level of the hood.Type: GrantFiled: February 22, 2002Date of Patent: June 22, 2004Assignee: Kubota CorporationInventors: Hitoshi Aoyama, Seiichi Ishiizumi, Katsumi Yanagihara, Kuninosuke Iwata, Norihide Iwata, Takahiro Komine, Yutaka Inubushi, Shigeo Shoen
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Publication number: 20030015363Abstract: A tractor with a cab (C) disposed rearwardly of a hood (8), the cab being mounted on a tractor body (T) including a body forming unit (100; 3, 4, 5, 6), the cab including a bottom wall (27) defining left and right footrests (27a, 27a). The cab (C) has a total length (L) larger than a total height (H3) thereof. The cab (C) is arranged to have the footrests (27a, 27a) substantially level with a lower end of the body forming unit (100; 3, 4, 5, 6). The cab (C) has an intermediate height level (x) lower than a height level (H4) of the hood (8).Type: ApplicationFiled: February 22, 2002Publication date: January 23, 2003Applicant: KUBOTA CORPORATIONInventors: Hitoshi Aoyama, Seiichi Ishiizumi, Katsumi Yanagihara, Kuninosuke Iwata, Norihide Iwata, Takahiro Komine, Yutaka Inubushi, Shigeo Shoen
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Patent number: 4723623Abstract: A four wheel drive vehicle comprising dirigible front wheels supported by an front axle case, a propelling drive transmission disposed in a rear portion of the vehicle, rear wheels receiving a drive from the propelling drive transmission, and a front wheel drive transmission mounted in the front axle case and receiving a drive divided out from the propelling drie transmission. The front wheel drive transmission is switchable between a standard drive mode in which an average peripheral speed of the front wheels is substantially the same as an average peripheral speed of the rear wheels, and an accelerating mode in which the average peripheral speed of the front wheels is greater than the average peripheral speed of the rear wheels. The front axle case is supported by the vehicle to be pivotable on a pivotal axis disposed at a mid-position transversely of the vehicle and extending longitudinally of the vehicle.Type: GrantFiled: April 3, 1987Date of Patent: February 9, 1988Assignee: Kubota, Ltd.Inventors: Akira Teraoka, Takashi Katayama, Katsumi Yanagihara