Patents by Inventor Katsuhiko Uemura

Katsuhiko Uemura 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: 20180338414
    Abstract: A work vehicle includes an inverter circuit (42) configured to provide electric current to a traveling motor unit (21, 22) based on an inverter drive signal, a target signal generation unit (51) configured to generate a control target signal for the inverter circuit (42) based on an operation detection signal, an inverter drive signal generation section (41) configured to generate an inverter drive signal based on the control target signal and output the inverter drive signal to the inverter circuit (42), a trouble detection section (53) configured to detect a vehicle trouble based on a state detection signal, and a signal superposition section (56) configured to superpose a pulsatory signal on the control target signal if the trouble detection section (53) detects a vehicle trouble and output a resultant superposed control target signal to the inverter drive signal generation section (41).
    Type: Application
    Filed: November 30, 2017
    Publication date: November 29, 2018
    Inventors: Yasuhiro Manji, Katsuhiko Uemura, Kazuaki Matsuda
  • Publication number: 20180338417
    Abstract: A grass mower includes a vehicle speed instruction value calculation section (53) for generating a vehicle speed instruction value including a maximal vehicle speed, based on an operational position of a man-operable vehicle speed controlling tool (15), a mode selection section (70) for selecting a control mode from a plurality of control modes, a control table (52) in which a plurality of control parameters are set, a vehicle speed control target value calculation section (54) configured to calculate a vehicle speed control target value, based on a vehicle speed instruction value generated by the vehicle speed instruction value calculation section (53) and a selected control parameter corresponding to the control mode selected by the mode selection section (70), a cutter blade control target value calculation section (55) configured to calculate a rotational speed control target value for a cutter blade (30), based on the selected control parameter, and a cutter blade control section (4B) configured to contr
    Type: Application
    Filed: December 8, 2017
    Publication date: November 29, 2018
    Inventors: Kazuaki Matsuda, Katsuhiko Uemura, Hirokazu Ito, Yasuhiro Manji
  • Patent number: 8028508
    Abstract: A mower unit includes a housing, a pair of cutting blades arranged inside the housing, each of the cutting blades being rotatable about a respective vertical axis supported by the housing, the cutting blades being driven to be rotated in opposite directions, and a baffle arranged generally between rotation regions of the cutting blades to guide air flows generated by the cutting blades. The baffle defines an upper baffle portion located adjacent an upper region of the housing, a lower baffle portion located adjacent a lower region of the housing, and an air passage formed for allowing the air flows to flow between the upper baffle portion and lower baffle portion.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: October 4, 2011
    Assignee: Kubota Corporation
    Inventors: Ryouzou Imanishi, Tomoyuki Morikawa, Katsuhiko Uemura, Nobuyuki Yamashita, Kazuaki Kurohara, Hiroshi Oshima
  • Patent number: 7980050
    Abstract: A mower unit includes a mower deck, a plurality of blades mounted inside the mower deck and rotatable about vertical shafts supported to the mower deck, the mower deck defining, on one lateral side thereof, a discharge outlet for discharging cut grass cut by the plurality of blades, and an opening and closing member configured to be movable to a closing position for closing the discharge outlet and also to an opening position away from the discharge outlet for opening the discharge outlet, the opening and closing member at the opening position being disposed along an outer face of the mower deck.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: July 19, 2011
    Assignee: Kubota Corporation
    Inventors: Ryouzou Imanishi, Hiroaki Kitaguchi, Nobuyuki Yamashita, Hiroki Nagai, Hiroshi Oshima, Tomoyuki Morikawa, Takashi Fujii, Toshiki Kanai, Katsuhiko Uemura, Hiroyuki Ogasawara
  • Patent number: 7905080
    Abstract: A grass collector adapted to be attached to a rear of a riding-type mower for receiving cut grass from a mower unit through a duct, the grass collector including a front container section having a rearwardly facing opening and adapted to be attached to the riding-type mower, the front container section carrying a first bottom plate having a substantially horizontal position. A rear container section is supported pivotably about a pivot point located in a rear upper region of the front container section and pivotable between a first position wherein the rear container section substantially covers the opening of the front container section and a second position pivoted from the first position to allow cut grass to fall, the rear container section having a second bottom plate having a substantially horizontal position.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: March 15, 2011
    Assignee: Kubota Corporation
    Inventors: Katsuhiko Uemura, Nobuyuki Yamashita, Kazuaki Kurohara, Hiroki Nagai
  • Patent number: 7814739
    Abstract: A riding type mower includes: a vehicle body, a driver's seat mounted on the vehicle body; an operation part arranged around the driver's seat; a mower unit provided on the vehicle body; a shutter for closing a discharge port; a shutter moving mechanism for moving the shutter between a close position closing the discharge port and an open position opening the discharge port; and a lock mechanism for locking the shutter at the close position. The mower unit includes: a mower deck; a cutting blade installed inside the mower deck; the discharge port formed in the mower deck, through which mown grass cut by the blade is discharge from the mower unit to outside. A shutter operating tool for remotely operating the shutter moving mechanism to open and close the shutter is provided in the operation part. The lock mechanism is remotely operable from the operation part.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: October 19, 2010
    Assignee: Kubota Corporation
    Inventors: Katsuhiko Uemura, Hiroki Nagai, Tomoyuki Morikawa, Ryouzou Imanishi, Hiroaki Kitaguchi, Takashi Fujii, Nobuyuki Yamashita, Toshiki Kanai
  • Publication number: 20100043379
    Abstract: A mower unit includes a mower deck, a plurality of blades mounted inside the mower deck and rotatable about vertical shafts supported to the mower deck, the mower deck defining, on one lateral side thereof, a discharge outlet for discharging cut grass cut by the plurality of blades, and an opening and closing member configured to be movable to a closing position for closing the discharge outlet and also to an opening position away from the discharge outlet for opening the discharge outlet, the opening and closing member at the opening position being disposed along an outer face of the mower deck.
    Type: Application
    Filed: September 22, 2009
    Publication date: February 25, 2010
    Applicant: KUBUTA CORPORATION
    Inventors: Ryouzou IMANISHI, Hiroaki KITAGUCHI, Nobuyuki YAMASHITA, Hiroki NAGAI, Hiroshi OSHIMA, Tomoyuki MORIKAWA, Takashi FUJII, Toshiki KANAI, Katsuhiko UEMURA, Hiroyuki OGASAWARA
  • Publication number: 20100031620
    Abstract: A riding type mower includes: a vehicle body, a driver's seat mounted on the vehicle body; an operation part arranged around the driver's seat; a mower unit provided on the vehicle body; a shutter for closing a discharge port; a shutter moving mechanism for moving the shutter between a close position closing the discharge port and an open position opening the discharge port; and a lock mechanism for locking the shutter at the close position. The mower unit includes: a mower deck; a cutting blade installed inside the mower deck; the discharge port formed in the mower deck, through which mown grass cut by the blade is discharge from the mower unit to outside. A shutter operating tool for remotely operating the shutter moving mechanism to open and close the shutter is provided in the operation part. The lock mechanism is remotely operable from the operation part.
    Type: Application
    Filed: February 18, 2009
    Publication date: February 11, 2010
    Applicant: KUBOTA CORPORATION
    Inventors: Katsuhiko Uemura, Hiroki Nagai, Tomoyuki Morikawa, Ryouzou Imanishi, Hiroaki Kitaguchi, Takashi Fujii, Nobuyuki Yamashita, Toshiki Kanai
  • Patent number: 7637089
    Abstract: A grass collecting apparatus for a lawn mower comprises a frame (22) supported by a vehicle body, a container supporting member (26) for supporting a grass collecting container (21) for storing grass clippings and including a container supporting surface (27) for receiving an opening edge of the grass collecting container, and a container cover (23) mounted on the frame to be oscillatable about a horizontal axis between a closed position and an opened position. An engaging member (35) is mounted on the container cover (23). The engaging member (35) is engageable with the opening edge (21b) of the grass collecting container (21) with oscillation of the container cover (23) from the opened position to the closed position, thereby positioning and maintaining the grass collecting container (21) on the container supporting member (26), and disengageable from the opening edge (21b) of the grass collecting container (21) with oscillation of the container cover (23) from the closed position to the opened position.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: December 29, 2009
    Assignee: Kubota Corporation
    Inventors: Nobuyuki Yamashita, Takashi Fujii, Hiroaki Kitaguchi, Toshiki Kanai, Katsuhiko Uemura, Tomoyuki Morikawa, Hiroki Nagai, Ryouzou Imanishi
  • Patent number: 7610742
    Abstract: A mower unit includes a mower deck, a plurality of blades mounted inside the mower deck and rotatable about vertical shafts supported to the mower deck, the mower deck defining, on one lateral side thereof, a discharge outlet for discharging cut grass cut by the plurality of blades, and an opening and closing member configured to be movable to a closing position for closing the discharge outlet and also to an opening position away from the discharge outlet for opening the discharge outlet, the opening and closing member at the opening position being disposed along an outer face of the mower deck.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: November 3, 2009
    Assignee: Kubota Corporation
    Inventors: Ryouzou Imanishi, Hiroaki Kitaguchi, Nobuyuki Yamashita, Hiroki Nagai, Hiroshi Oshima, Tomoyuki Morikawa, Takashi Fujii, Toshiki Kanai, Katsuhiko Uemura, Hiroyuki Ogasawara
  • Publication number: 20090260339
    Abstract: A grass collector adapted to be attached to a rear of a riding-type mower for receiving cut grass from a mower unit through a duct, the grass collector including a front container section having a rearwardly facing opening and adapted to be attached to the riding-type mower, the front container section carrying a first bottom plate having a substantially horizontal position. A rear container section is supported pivotably about a pivot point located in a rear upper region of the front container section and pivotable between a first position wherein the rear container section substantially covers the opening of the front container section and a second position pivoted from the first position to allow cut grass to fall, the rear container section having a second bottom plate having a substantially horizontal position.
    Type: Application
    Filed: June 29, 2009
    Publication date: October 22, 2009
    Applicant: KUBOTA CORPORATION
    Inventors: Katsuhiko Uemura, Nobuyuki Yamashita, Kazuaki Kurohara, Hiroki Nagai
  • Publication number: 20090241501
    Abstract: A mower unit includes a housing, a pair of cutting blades arranged inside the housing, each of the cutting blades being rotatable about a respective vertical axis supported by the housing, the cutting blades being driven to be rotated in opposite directions, and a baffle arranged generally between rotation regions of the cutting blades to guide air flows generated by the cutting blades. The baffle defines an upper baffle portion located adjacent an upper region of the housing, a lower baffle portion located adjacent a lower region of the housing, and an air passage formed for allowing the air flows to flow between the upper baffle portion and lower baffle portion.
    Type: Application
    Filed: June 5, 2009
    Publication date: October 1, 2009
    Applicant: KUBOTA CORPORATION
    Inventors: Ryouzou Imanishi, Tomoyuki Morikawa, Katsuhiko Uemura, Nobuyuki Yamashita, Kazuaki Kurohara, Hiroshi Oshima
  • Publication number: 20090211215
    Abstract: A grass collecting apparatus for a lawn mower comprises a frame (22) supported by a vehicle body, a container supporting member (26) for supporting a grass collecting container (21) for storing grass clippings and including a container supporting surface (27) for receiving an opening edge of the grass collecting container, and a container cover (23) mounted on the frame to be oscillatable about a horizontal axis between a closed position and an opened position. An engaging member (35) is mounted on the container cover (23). The engaging member (35) is engageable with the opening edge (21b) of the grass collecting container (21) with oscillation of the container cover (23) from the opened position to the closed position, thereby positioning and maintaining the grass collecting container (21) on the container supporting member (26), and disengageable from the opening edge (21b) of the grass collecting container (21) with oscillation of the container cover (23) from the closed position to the opened position.
    Type: Application
    Filed: September 3, 2008
    Publication date: August 27, 2009
    Applicant: KUBOTA CORPORATION
    Inventors: Nobuyuki Yamashita, Takashi Fujii, Hiroaki Kitaguchi, Toshiki Kanai, Katsuhiko Uemura, Tomoyuki Morikawa, Hiroki Nagai, Ryouzou Imanishi
  • Patent number: 7565790
    Abstract: A grass collector adapted to be attached to a rear of a riding-type mower for receiving cut grass from a mower unit through a duct, the grass collector comprises a front container section having a rearwardly facing opening and adapted to be attached to the riding-type mower, the front container section carrying a first bottom plate having a substantially horizontal position; and a rear container section supported pivotably about a pivot point located in a rear upper region of the front container section and pivotable between a first position wherein the rear container section substantially covers the opening of the front container section and a second position pivoted from the first position to allow cut grass to fall, the rear container section having a second bottom plate having a substantially horizontal position.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: July 28, 2009
    Assignee: Kubota Corporation
    Inventors: Katsuhiko Uemura, Nobuyuki Yamashita, Kazuaki Kurohara, Hiroki Nagai
  • Patent number: 7543435
    Abstract: A mower unit includes a housing, a pair of cutting blades arranged inside the housing, each of the cutting blades being rotatable about a respective vertical axis supported by the housing, the cutting blades being driven to be rotated in opposite directions, and a baffle arranged generally between rotation regions of the cutting blades to guide air flows generated by the cutting blades. The baffle defines an upper baffle portion located adjacent an upper region of the housing, a lower baffle portion located adjacent a lower region of the housing, and an air passage formed for allowing the air flows to flow between the upper baffle portion and lower baffle portion.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: June 9, 2009
    Assignee: Kubota Corporation
    Inventors: Ryouzou Imanishi, Tomoyuki Morikawa, Katsuhiko Uemura, Nobuyuki Yamashita, Kazuaki Kurohara, Hiroshi Oshima
  • Publication number: 20080092509
    Abstract: A mower unit includes a mower deck, a plurality of blades mounted inside said mower deck and rotatable about vertical shafts supported to the mower deck, the mower deck defining, on one lateral side thereof, a discharge outlet for discharging cut grass cut by the plurality of blades, and an opening/closing member configured to be movable to a closing position for closing the discharge outlet and also to an opening position away from the discharge outlet for opening the discharge outlet, the opening/closing member at the opening position being disposed along an outer face of the mower deck.
    Type: Application
    Filed: August 31, 2007
    Publication date: April 24, 2008
    Applicant: KUBUTA CORPORATION
    Inventors: Ryouzou IMANISHI, Hiroaki KITAGUCHI, Nobuyuki YAMASHITA, Hiroki NAGAI, Hiroshi OSHIMA, Tomoyuki MORIKAWA, Takashi FUJII, Toshiki KANAI, Katsuhiko UEMURA, Hiroyuki OGASAWARA
  • Publication number: 20080086998
    Abstract: A mower unit includes a housing, a pair of cutting blades arranged inside the housing, each of the cutting blades being rotatable about a respective vertical axis supported by said housing, the cutting blades being driven to be rotated in opposite directions, and a baffle arranged generally between rotation regions of the cutting blades to guide air flows generated by the cutting blades. The baffle defines an upper baffle portion located adjacent an upper region of the housing, a lower baffle portion located adjacent a lower region of the housing, and an air passage formed for allowing the air flows to flow between the upper baffle portion and lower baffle portion.
    Type: Application
    Filed: September 12, 2007
    Publication date: April 17, 2008
    Applicant: KUBOTA CORPORATION
    Inventors: Ryouzou Imanishi, Tomoyuki Morikawa, Katsuhiko Uemura, Nobuyuki Yamashita, Kazuaki Kurohara, Hiroshi Oshima
  • Patent number: 7240759
    Abstract: A transmission case housing a transmission mechanism for transmitting power to dirigible wheels includes an axle case having a main body and vertical bosses extending in a bent way from opposite ends of the main body, and pivoting cases supporting axles of the dirigible wheels. The axle case (8) is bisected into a first case half (8F) and a second case half (8R) at a split plane parallel to a direction of extension of the transmission mechanism (S) housed therein. The first case half (8F) and second case half (8R) are connected by connecting bolt (38). Each vertical boss (8b) has bearings (26), and each pivoting case (25) is attached to the bearings (26) to be pivotable relative to the vertical boss (8b).
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: July 10, 2007
    Assignee: Kubota Corporation
    Inventors: Katsuhiko Uemura, Shoso Ishimori
  • Publication number: 20070056259
    Abstract: A grass collector adapted to be attached to a rear of a riding-type mower for receiving cut grass from a mower unit through a duct, the grass collector comprises a front container section having a rearwardly facing opening and adapted to be attached to the riding-type mower, the front container section carrying a first bottom plate having a substantially horizontal position; and a rear container section supported pivotably about a pivot point located in a rear upper region of the front container section and pivotable between a first position wherein the rear container section substantially covers the opening of the front container section and a second position pivoted from the first position to allow cut grass to fall, the rear container section having a second bottom plate having a substantially horizontal position.
    Type: Application
    Filed: August 22, 2006
    Publication date: March 15, 2007
    Applicant: Kubota Corporation
    Inventors: Katsuhiko Uemura, Nobuyuki Yamashita, Kazuaki Kurohara, Hiroki Nagai
  • Patent number: 7172040
    Abstract: A work vehicle comprises: a plurality of wheels; a vehicle body supported by the wheels; a transmission case provided on the vehicle body, the transmission case having a first case portion and a second case portion and a middle portion extending between respective lower portions of the first and second case portions, the transmission case being divided by an abutting surface extending in a vertical direction of the vehicle; a hydraulic device associated with the transmission case; a hydraulic pump supplying a hydraulic fluid to the hydraulic device; an oil path formed in a surface of the abutting surface, one end of the oil path being formed in the first case portion as an oil port for the hydraulic device, and the other end of the oil path opening to the second case portion; and a hydraulic fluid outlet provided to the first case and connected to the hydraulic pump to supply hydraulic fluid to the hydraulic pump.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: February 6, 2007
    Assignee: Kubota Corporation
    Inventors: Hiroshi Oshima, Katsuhiko Uemura, Tomoyuki Morikawa, Hiroshi Shimada, Masashi Osuga