Patents by Inventor Kenichiro Tsuji

Kenichiro Tsuji 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).

  • Patent number: 11975605
    Abstract: A front wheel clutch and a front wheel acceleration clutch are supported to a front wheel transmission shaft. Between the front wheel clutch and the front wheel acceleration clutch, there is provided a holder supporting the front wheel transmission shaft. A first operational oil passage for switching over the front wheel clutch is defined respectively in and between the holder and the front wheel transmission shaft. A second operational oil passage for switching over the front wheel acceleration clutch is defined respectively in and between the holder and the front wheel transmission shaft.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: May 7, 2024
    Assignee: KUBOTA CORPORATION
    Inventors: Shunsuke Sonoda, Kenichiro Tsuji, Hiroki Takemoto
  • Publication number: 20230118454
    Abstract: A tractor includes: a vehicle body; an engine disposed in an engine compartment; a radiator that is disposed, in the engine compartment, further toward a vehicle-body front side than the engine and cools the engine; an exhaust-gas cleaning device that purifies exhaust gas exhausted from the engine using a reducing agent; a reducing-agent tank that stores the reducing agent supplied to the exhaust-gas cleaning device; and a battery, the reducing-agent tank being disposed, in the engine compartment, side-by-side with the battery and further toward the vehicle-body front side than the radiator.
    Type: Application
    Filed: October 28, 2022
    Publication date: April 20, 2023
    Applicant: Kubota Corporation
    Inventors: Kenichiro Tsuji, Hiroki Nakatsuka, Ryuichi Inoue
  • Publication number: 20220153132
    Abstract: A front wheel clutch and a front wheel acceleration clutch are supported to a front wheel transmission shaft. Between the front wheel clutch and the front wheel acceleration clutch, there is provided a holder supporting the front wheel transmission shaft. A first operational oil passage for switching over the front wheel clutch is defined respectively in and between the holder and the front wheel transmission shaft. A second operational oil passage for switching over the front wheel acceleration clutch is defined respectively in and between the holder and the front wheel transmission shaft.
    Type: Application
    Filed: April 2, 2020
    Publication date: May 19, 2022
    Applicant: KUBOTA CORPORATION
    Inventors: Shunsuke SONODA, Kenichiro TSUJI, Hiroki TAKEMOTO
  • Patent number: 10661728
    Abstract: A license plate support mechanism is equipped with an attachment portion to which a license plate can be attached, a fixation portion fixating the attachment portion to a vehicle body, and a switching mechanism. The switching mechanism couples the attachment portion to the fixation portion such that the attachment portion is capable of displacing relative to the fixation portion. The switching mechanism also enables the attachment portion to switch between a storage position, in which the attachment portion is stored on a left/right direction inward side of a left/right pair of rear wheel fenders, and a display position, in which the attachment portion is positioned on the left/right direction outward side of the left/right pair of rear wheel fenders.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: May 26, 2020
    Assignee: KUBOTA CORPORATION
    Inventors: Kenichiro Tsuji, Shigeo Sakamoto
  • Patent number: 10626895
    Abstract: A working machine includes a vehicle body, a travel apparatus provided to a rear portion of the vehicle body, a fender provided above the travel apparatus, and hydraulic piping that is disposed between the travel apparatus and the fender and that extends from a front-portion side to a rear-portion side of the fender.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: April 21, 2020
    Assignee: Kubota Corporation
    Inventors: Kenichiro Tsuji, Shigeo Sakamoto, Toshimitsu Yazaki, Toshiya Tsuji
  • Publication number: 20190039537
    Abstract: A license plate support mechanism is equipped with an attachment portion to which a license plate can be attached, a fixation portion fixating the attachment portion to a vehicle body, and a switching mechanism. The switching mechanism couples the attachment portion to the fixation portion such that the attachment portion is capable of displacing relative to the fixation portion. The switching mechanism also enables the attachment portion to switch between a storage position, in which the attachment portion is stored on a left/right direction inward side of a left/right pair of rear wheel fenders, and a display position, in which the attachment portion is positioned on the left/right direction outward side of the left/right pair of rear wheel fenders.
    Type: Application
    Filed: June 25, 2018
    Publication date: February 7, 2019
    Applicant: KUBOTA CORPORATION
    Inventors: Kenichiro TSUJI, Shigeo SAKAMOTO
  • Publication number: 20180094656
    Abstract: A working machine includes a vehicle body, a travel apparatus provided to a rear portion of the vehicle body, a fender provided above the travel apparatus, and hydraulic piping that is disposed between the travel apparatus and the fender and that extends from a front-portion side to a rear-portion side of the fender.
    Type: Application
    Filed: September 28, 2017
    Publication date: April 5, 2018
    Applicant: Kubota Corporation
    Inventors: Kenichiro Tsuji, Shigeo Sakamoto, Toshimitsu Yazaki, Toshiya Tsuji
  • Patent number: 9032822
    Abstract: The arrangement of driven gears on a countershaft in a main speed change mechanism is shortened in an axial direction, whereby the main speed change mechanism can be made compact in the axial direction. Driven gears on a countershaft of a main speed change mechanism are successively arranged from front to rear in descending order of speed. A sub-low-speed drive gear for a sub-speed change mechanism is provided in front of the highest-speed driven gear on the countershaft, and the next-highest-speed driven gear serves as a sub-high-speed drive gear for the sub-speed change mechanism. A sub-low-speed driven gear and a sub-high-speed driven gear for the sub-speed change mechanism are provided on an output shaft to be engaged with the sub-low-speed drive gear and the next-highest-speed driven gear, respectively, and the highest-speed driven gear, the sub-low-speed drive gear, and the next-highest-speed driven gear are caused to overlap in a fore-and-aft direction.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: May 19, 2015
    Assignee: Kubota Corporation
    Inventor: Kenichiro Tsuji
  • Patent number: 8763748
    Abstract: When an operation lever is operated to either a speed changing path or a neutral path, a second link mechanism establishes no operative coupling between the operation lever and a parking brake mechanism. When the operation lever is operated from the neutral path to a linking path, the second link mechanism establishes operative coupling between the operation lever and the parking brake mechanism. Further, when the operation lever is operated to a braking path, the parking brake mechanism is activated. When the lever is operated to a locking path, a locking mechanism is activated.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: July 1, 2014
    Assignee: Kubota Corporation
    Inventor: Kenichiro Tsuji
  • Publication number: 20130228390
    Abstract: When an operation lever is operated to either a speed changing path or a neutral path, a second link mechanism establishes no operative coupling between the operation lever and a parking brake mechanism. When the operation lever is operated from the neutral path to a linking path, the second link mechanism establishes operative coupling between the operation lever and the parking brake mechanism. Further, when the operation lever is operated to a braking path, the parking brake mechanism is activated. When the lever is operated to a locking path, a locking mechanism is activated.
    Type: Application
    Filed: August 30, 2012
    Publication date: September 5, 2013
    Applicant: KUBOTA CORPORATION
    Inventor: Kenichiro Tsuji
  • Publication number: 20130213158
    Abstract: The arrangement of driven gears on a countershaft in a main speed change mechanism is shortened in an axial direction, whereby the main speed change mechanism can be made compact in the axial direction. Driven gears on a countershaft of a main speed change mechanism are successively arranged from front to rear in descending order of speed. A sub-low-speed drive gear for a sub-speed change mechanism is provided in front of the highest-speed driven gear on the countershaft, and the next-highest-speed driven gear serves as a sub-high-speed drive gear for the sub-speed change mechanism. A sub-low-speed driven gear and a sub-high-speed driven gear for the sub-speed change mechanism are provided on an output shaft to be engaged with the sub-low-speed drive gear and the next-highest-speed driven gear, respectively, and the highest-speed driven gear, the sub-low-speed drive gear, and the next-highest-speed driven gear are caused to overlap in a fore-and-aft direction.
    Type: Application
    Filed: September 27, 2011
    Publication date: August 22, 2013
    Applicant: KUBOTA CORPORATION
    Inventor: Kenichiro Tsuji
  • Patent number: 8322240
    Abstract: A hydraulic pump device for a work vehicle having a transmission case that houses a PTO shaft (12) comprises: a hydraulic pump (35), a pump input shaft (36) of the hydraulic pump (35) that has a projecting shaft portion projecting into the transmission case (1), a first bevel gear (41), and a second bevel gear (42). The first bevel gear (41) is fitted on the PTO shaft (12) and the second bevel gear (42) is connected to the projecting shaft portion. A holder (38) for supporting the PTO shaft (12) is removably attached to the transmission case (1). The first bevel gear and the second bevel gear are supported to the holder for rotation about respective axes.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: December 4, 2012
    Assignee: Kubota Corporation
    Inventor: Kenichiro Tsuji
  • Patent number: 8181547
    Abstract: A speed change device for a traveling vehicle comprising: a thrust shaft connected to an engine; a speed change mechanism for changing between a high and a low speed provided to the thrust shaft; a counter shaft for transmitting an output from the speed change mechanism for changing between a high and a low speed; a mechanism for switching between advancing and retracting provided to the counter shaft, the mechanism having a forward-rotation idler gear rotatably supported on the thrust shaft; a speed change shaft for transmitting reverse-rotation power from the counter shaft as forward-rotation power via the forward-rotation idler gear; a driven shaft provided as an extension to the thrust shaft; and a main speed-change mechanism having a driving gear group provided to the speed change shaft and a driven gear group provided to the driven shaft.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: May 22, 2012
    Assignee: Kubota Corporation
    Inventors: Kenichiro Tsuji, Tetsuya Yamamoto, Yoshihiro Mitobe
  • Publication number: 20100331131
    Abstract: A hydraulic pump device for a work vehicle having a transmission case that houses a PTO shaft (12) comprises: a hydraulic pump (35), a pump input shaft (36) of the hydraulic pump (35) that has a projecting shaft portion projecting into the transmission case (1), a first bevel gear (41), and a second bevel gear (42). The first bevel gear (41) is fitted on the PTO shaft (12) and the second bevel gear (42) is connected to the projecting shaft portion. A holder (38) for supporting the PTO shaft (12) is removably attached to the transmission case (1). The first bevel gear and the second bevel gear are supported to the holder for rotation about respective axes.
    Type: Application
    Filed: August 31, 2009
    Publication date: December 30, 2010
    Applicant: KUBOTA CORPORATION
    Inventor: Kenichiro Tsuji
  • Publication number: 20090100952
    Abstract: 1. A speed change device for a traveling vehicle comprising: a thrust shaft connected to an engine; a speed change mechanism for changing between a high and a low speed provided to the thrust shaft; a counter shaft for transmitting an output from the speed change mechanism for changing between a high and a low speed; a mechanism for switching between advancing and retracting provided to the counter shaft, the mechanism having a forward-rotation idler gear rotatably supported on the thrust shaft; a speed change shaft for transmitting reverse-rotation power from the counter shaft as forward-rotation power via the forward-rotation idler gear; a driven shaft provided as an extension to the thrust shaft; and a main speed-change mechanism having a driving gear group provided to the speed change shaft and a driven gear group provided to the driven shaft.
    Type: Application
    Filed: September 10, 2008
    Publication date: April 23, 2009
    Applicant: KUBOTA CORPORATION
    Inventors: Kenichiro Tsuji, Tetsuya Yamamoto, Yoshihiro Mitobe
  • Patent number: 7500410
    Abstract: A transmission for a tractor having a change speed device operable when an engine and the transmission are connected to transmit, in varied speeds, power from the engine to a driving wheel, a main drive shaft for receiving power from the engine when the engine and the transmission are connected, and a reverse and forward drive switching device disposed between the engine and the change speed device operable to switch a direction of rotation of power from the engine. The reverse and forward drive switching device being shiftable between a high-speed forward drive position, a low-speed forward drive position, and a reverse drive position, and including a high-speed forward drive clutch, a low-speed forward drive clutch, and a reverse drive clutch wherein each clutch is mounted on the main drive shaft for switching the reverse and forward drive switching device to each respective clutch drive position.
    Type: Grant
    Filed: March 3, 2006
    Date of Patent: March 10, 2009
    Assignee: Kubota Corporation
    Inventor: Kenichiro Tsuji
  • Patent number: 7434488
    Abstract: A transmission for a tractor comprises a transmission case having an opening that opens to exterior of the transmission case and a speed change device that is housed in the transmission case. The transmission also includes a cover removably attached to the transmission case for closing the opening of the transmission, a main speed change shift fork supported by the cover and capable of engaging with and moving a main speed change shifter, and a sub speed change shift fork supported by the cover and capable of engaging with and moving a sub speed change shifter. The cover is capable of mounting a creep speed change device having a creep speed position.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: October 14, 2008
    Assignee: Kubota Corporation
    Inventors: Kenichiro Tsuji, Toshimitsu Yazaki, Toshinobu Owada
  • Publication number: 20070085339
    Abstract: The joint includes a duct connecting portion provided at one end side of the hydraulic joint and connected to a hydraulic duct and a passage shutting-off portion provided at the other end side of the hydraulic joint and connected to the pressure oil passage, thereby shutting off a communicating passage communicated with the pressure oil passage.
    Type: Application
    Filed: September 5, 2006
    Publication date: April 19, 2007
    Applicant: Kubota Corporation
    Inventors: Kenichiro Tsuji, Hideaki Dozono
  • Publication number: 20060243513
    Abstract: A transmission for a tractor having a change speed device operable when an engine and the transmission are connected to transmit, in varied speeds, power from the engine to a driving wheel, a main drive shaft for receiving power from the engine when the engine and the transmission are connected, and a reverse and forward drive switching device disposed between the engine and the change speed device operable to switch a direction of rotation of power from the engine. The reverse and forward drive switching device being shiftable between a high-speed forward drive position, a low-speed forward drive position, and a reverse drive position, and including a high-speed forward drive clutch, a low-speed forward drive clutch, and a reverse drive clutch wherein each clutch is mounted on the main drive shaft for switching the reverse and forward drive switching device to each respective clutch drive position.
    Type: Application
    Filed: March 3, 2006
    Publication date: November 2, 2006
    Applicant: Kubota Corporation
    Inventor: Kenichiro Tsuji
  • Publication number: 20060243076
    Abstract: A transmission for a tractor comprises a transmission case having an opening that opens to exterior of the transmission case and a speed change device that is housed in the transmission case. The transmission also includes a cover removably attached to the transmission case for closing the opening of the transmission, a main speed change shift fork supported by the cover and capable of engaging with and moving a main speed change shifter, and a sub speed change shift fork supported by the cover and capable of engaging with and moving a sub speed change shifter. The cover is capable of mounting a creep speed change device having a creep speed position.
    Type: Application
    Filed: February 9, 2006
    Publication date: November 2, 2006
    Applicant: Kubota Corporation
    Inventors: Kenichiro Tsuji, Toshimitsu Yazaki, Toshinobu Owada