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).

  • Publication number: 20240155962
    Abstract: 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: Application
    Filed: January 23, 2024
    Publication date: May 16, 2024
    Inventors: Takashi SAWAI, Norita TOTTORI, Katsumi YANAGIHARA, Kazuya KIYAMA, Hiroyuki KAWAMURA, Shinichiro MINAMI, Ryo KUMAI, Mami FUJII
  • Publication number: 20230202290
    Abstract: 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: Application
    Filed: November 30, 2022
    Publication date: June 29, 2023
    Inventors: Ryosuke TANAKA, Naoya OKAMOTO, Katsumi YANAGIHARA, Nobuki DAIMON, Yuta TSUJIMOTO
  • Publication number: 20230000002
    Abstract: 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: Application
    Filed: September 4, 2020
    Publication date: January 5, 2023
    Inventor: Katsumi YANAGIHARA
  • Publication number: 20220225556
    Abstract: 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: Application
    Filed: May 29, 2020
    Publication date: July 21, 2022
    Inventors: Daisuke NAKAYAMA, Hironobu NOGAMI, Norihide IWATA, Katsumi YANAGIHARA, Naoto MANTOKU, Keita ONO
  • Patent number: 8905182
    Abstract: 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: Grant
    Filed: March 6, 2013
    Date of Patent: December 9, 2014
    Assignee: Kubota Corporation
    Inventors: Koji Masumoto, Katsumi Yanagihara, Makoto Kubota
  • Publication number: 20140020972
    Abstract: 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: Application
    Filed: March 6, 2013
    Publication date: January 23, 2014
    Applicant: KUBOTA CORPORATION
    Inventors: Koji Masumoto, Katsumi Yanagihara, Makoto Kubota
  • Patent number: 7648001
    Abstract: 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 a
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: January 19, 2010
    Assignee: Kubota Corporation
    Inventors: Katsumi Yanagihara, Shigeo Shoen, Kenkichi Hirakawa, Takahiro Komine, Tadashi Nakamura
  • Publication number: 20070056793
    Abstract: 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 a
    Type: Application
    Filed: August 24, 2006
    Publication date: March 15, 2007
    Applicant: Kubota Corporation
    Inventors: Katsumi Yanagihara, Shigeo Shoen, Kenkichi Hirakawa, Takahiro Komine, Tadashi Nakamura
  • Patent number: 6752228
    Abstract: 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: Grant
    Filed: February 22, 2002
    Date of Patent: June 22, 2004
    Assignee: Kubota Corporation
    Inventors: Hitoshi Aoyama, Seiichi Ishiizumi, Katsumi Yanagihara, Kuninosuke Iwata, Norihide Iwata, Takahiro Komine, Yutaka Inubushi, Shigeo Shoen
  • Publication number: 20030015363
    Abstract: 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: Application
    Filed: February 22, 2002
    Publication date: January 23, 2003
    Applicant: KUBOTA CORPORATION
    Inventors: Hitoshi Aoyama, Seiichi Ishiizumi, Katsumi Yanagihara, Kuninosuke Iwata, Norihide Iwata, Takahiro Komine, Yutaka Inubushi, Shigeo Shoen
  • Patent number: 4723623
    Abstract: 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: Grant
    Filed: April 3, 1987
    Date of Patent: February 9, 1988
    Assignee: Kubota, Ltd.
    Inventors: Akira Teraoka, Takashi Katayama, Katsumi Yanagihara