Patents by Inventor Hiroshi Tabeta

Hiroshi Tabeta 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: 10961689
    Abstract: An engine cover (23) is provided between a counterweight (7) and a rear surface part (15B) of a cab (15) to be capable of opening/closing in an upper-lower direction and a heat exchanger cover (28) is provided between the rear side of a left side surface part (15C) and a right side surface part (15D) of the cab (15) and a revolving frame (6). The heat exchanger cover (28) is formed of a horizontal-opening structure of being rotatable in a front-rear direction to the revolving frame (6) with a front end (28C) in the front-rear direction as a fulcrum and a rear end (28D) in the front-rear direction as a free end. A heat exchanger cover lock mechanism (32) is provided on the rear end side of the heat exchanger cover (28) to hold the heat exchanger cover (28) in a closed state, and in a state where both the heat exchanger cover (28) and the engine cover (23) are closed, the engine cover (23) covers the rear end (28D) of the heat exchanger cover (28) and the heat exchanger cover lock mechanism (32) from backward.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: March 30, 2021
    Assignee: Hitachi Construction Machinery Tierra Co., Ltd
    Inventors: Yohei Iwamoto, Junya Kawamoto, Hiroshi Tabeta
  • Publication number: 20200232184
    Abstract: An engine cover (23) is provided between a counterweight (7) and a rear surface part (15B) of a cab (15) to be capable of opening/closing in an upper-lower direction and a heat exchanger cover (28) is provided between the rear side of a left side surface part (15C) and a right side surface part (15D) of the cab (15) and a revolving frame (6). The heat exchanger cover (28) is formed of a horizontal-opening structure of being rotatable in a front-rear direction to the revolving frame (6) with a front end (28C) in the front-rear direction as a fulcrum and a rear end (28D) in the front-rear direction as a free end. A heat exchanger cover lock mechanism (32) is provided on the rear end side of the heat exchanger cover (28) to hold the heat exchanger cover (28) in a closed state, and in a state where both the heat exchanger cover (28) and the engine cover (23) are closed, the engine cover (23) covers the rear end (28D) of the heat exchanger cover (28) and the heat exchanger cover lock mechanism (32) from backward.
    Type: Application
    Filed: September 7, 2016
    Publication date: July 23, 2020
    Inventors: Yohei IWAMOTO, Junya KAWAMOTO, Hiroshi TABETA
  • Patent number: 10392784
    Abstract: An upper revolving structure (4) includes a revolving frame (6), an engine (7), a fuel tank (11), an operator's seat platform (16) provided by covering an upper side of the fuel tank (11), an operator's seat (18) mounted on the operator's seat platform (16), and a cab (22) covering a periphery of the operator's seat (18). The fuel tank (11) is disposed between the revolving frame (6) and the operator's seat platform (16), brought closer to a left surface part (25) side of the cab (22). A level gauge (29) is provided on an outer surface of the fuel tank (11). A fuel filling opening (27) surrounding a fuel filling port (11J) of the fuel tank (11) and a level gauge opening (28) are provided on the left surface part (25) of the cab (22).
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: August 27, 2019
    Assignee: Hitachi Construction Machinery Tierra Co., Ltd.
    Inventors: Hiroshi Tabeta, Junya Kawamoto
  • Publication number: 20180291590
    Abstract: An upper revolving structure (4) includes a revolving frame (6), an engine (7), a fuel tank (11), an operator's seat platform (16) provided by covering an upper side of the fuel tank (11), an operator's seat (18) mounted on the operator's seat platform (16), and a cab (22) covering a periphery of the operator's seat (18). The fuel tank (11) is disposed between the revolving frame (6) and the operator's seat platform (16), brought closer to a left surface part (25) side of the cab (22). A level gauge (29) is provided on an outer surface of the fuel tank (11). A fuel filling opening (27) surrounding a fuel filling port (11J) of the fuel tank (11) and a level gauge opening (28) are provided on the left surface part (25) of the cab (22).
    Type: Application
    Filed: March 7, 2016
    Publication date: October 11, 2018
    Inventors: Hiroshi TABETA, Junya KAWAMOTO
  • Patent number: 9637888
    Abstract: A compact excavator includes: a swing post which is attached to a upperstructure and which can swing in a left/right direction, a working device which is attached to the swing post and which includes a boom cylinder, a counterweight, and hydraulic hoses which extend upwards between opposite side plates of the swing post, and through which pressure oil for driving the boom cylinder of the working device is guided. The compact excavator further includes a guide plate which is provided in the swing post, and which guides the hydraulic hoses downwards while restricting the hydraulic hoses from moving to approach a handrail when the hydraulic hoses attempt to expand toward the handrail due to driving of the working device.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: May 2, 2017
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Yohei Iwamoto, Junya Kawamoto, Osamu Kokuryou, Hiroshi Tabeta, Yasuhiro Miyahara
  • Patent number: 9534354
    Abstract: Disclosed is a construction machine that enables an operator to operate a vehicle width changing control lever while visually confirming positions of crawlers. The construction machine includes a lower track structure 1 whose left and right crawler track devices 11A and 11B are adapted to change in spatial interval, and an upper swing structure 2 swingably mounted above the lower track structure. The construction machine further includes a hydraulically actuated cylinder for changing vehicle width, disposed between the left and right crawler track devices, the vehicle width changing cylinder changing the interval between the left and right crawler track devices upon supply and discharge of a hydraulic fluid being controlled by a vehicle width changing control valve, and a vehicle width changing control lever 34 disposed on a left section of a swing body support structure 50 relative to an operator's seat 23, the vehicle width changing control lever operating the vehicle width changing control valve.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: January 3, 2017
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Daisuke Yamamoto, Yohei Iwamoto, Hiroshi Tabeta, Osamu Kokuryo, Junya Kawamoto
  • Publication number: 20160326716
    Abstract: Disclosed is a construction machine that enables an operator to operate a vehicle width changing control lever while visually confirming positions of crawlers. The construction machine includes a lower track structure 1 whose left and right crawler track devices 11A and 11B are adapted to change in spatial interval, and an upper swing structure 2 swingably mounted above the lower track structure. The construction machine further includes a hydraulically actuated cylinder for changing vehicle width, disposed between the left and right crawler track devices, the vehicle width changing cylinder changing the interval between the left and right crawler track devices upon supply and discharge of a hydraulic fluid being controlled by a vehicle width changing control valve, and a vehicle width changing control lever 34 disposed on a left section of a swing body support structure 50 relative to an operator's seat 23, the vehicle width changing control lever operating the vehicle width changing control valve.
    Type: Application
    Filed: July 18, 2016
    Publication date: November 10, 2016
    Inventors: Daisuke YAMAMOTO, Yohei IWAMOTO, Hiroshi TABETA, Osamu KOKURYO, Junya KAWAMOTO
  • Patent number: 9303389
    Abstract: A control valve block is mounted on a bottom plate of a revolving frame through a control valve block mounting plate. In this case, a left support member and a right support member are provided on a back surface of the control valve block mounting plate at two spots with equal distances sandwiching a center position of gravity (G) of the control valve block. The left and right support members are mounted on a support beam provided on the bottom plate of the revolving frame. On the other hand, a weight-reducing part is provided at a part in the bottom plate of the revolving frame away from the support beam. The control valve block which is a heavy article is stably supported on the bottom plate at two spots sandwiching its center position of gravity (G). Moreover, the weight of the revolving frame can be reduced by the weight-reducing part.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: April 5, 2016
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Yohei Iwamoto, Junya Kawamoto, Osamu Kokuryou, Hiroshi Tabeta
  • Publication number: 20160060840
    Abstract: A compact excavator including: a swing post (3) which is attached to a upperstructure (2) and which can swing in a left/right direction; a working device (4) which is attached to the swing post (3) and which includes a boom cylinder (5a), etc.; a counterweight (10) which is disposed in a rear part of the upperstructure (2); and hydraulic hoses (14) which extend upwards between opposite side plates (3a and 3b) of the swing post (3), and through which pressure oil for driving the boom cylinder (5a), etc. of the working device (4) is guided; wherein: the compact excavator further includes a guide plate (20) which is provided in the swing post (3), and which guides the hydraulic hoses (14) downwards while restricting the hydraulic hoses (14) from moving to approach a handrail (11) when the hydraulic hoses (14) attempt to expand toward the handrail (11) due to driving of the working device (4).
    Type: Application
    Filed: April 25, 2014
    Publication date: March 3, 2016
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Yohei IWAMOTO, Junya KAWAMOTO, Osamu KOKURYOU, Hiroshi TABETA, Yasuhiro MIYAHARA
  • Publication number: 20150211207
    Abstract: Disclosed is a construction machine that enables an operator to operate a vehicle width changing control lever while visually confirming positions of crawlers. The construction machine includes a lower track structure 1 whose left and right crawler track devices 11A and 11B are adapted to change in spatial interval, and an upper swing structure 2 swingably mounted above the lower track structure. The construction machine further includes a hydraulically actuated cylinder for changing vehicle width, disposed between the left and right crawler track devices, the vehicle width changing cylinder changing the interval between the left and right crawler track devices upon supply and discharge of a hydraulic fluid being controlled by a vehicle width changing control valve, and a vehicle width changing control lever 34 disposed on a left section of a swing body support structure 50 relative to an operator's seat 23, the vehicle width changing control lever operating the vehicle width changing control valve.
    Type: Application
    Filed: January 20, 2015
    Publication date: July 30, 2015
    Inventors: Daisuke YAMAMOTO, Yohei IWAMOTO, Hiroshi TABETA, Osamu KOKURYO, Junya KAWAMOTO
  • Patent number: 9033086
    Abstract: [Problem] To provide a construction machine with a step arranged in an operator's cab, which makes it possible to enlarge the shape or dimensions of the step without increasing a swing radius. [Solution] In a compact excavator provided with a step that facilitates ingress to and egress from the operator's cab (6), the step is provided at a part thereof with an outwardly-extending edge portion (12a) that extends out beyond an opening plane (16) forming an ingress/egress opening (20), and a door (5) is provided at a part thereof with a convex part (5a) that covers the outwardly-extending edge portion (12a) of the step when the door (5) is in a closed position.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: May 19, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shougo Kimura, Tomoyuki Tanaka, Hiroshi Tabeta, Hajime Ishii
  • Patent number: 8978812
    Abstract: An operator's seat mounting section (11) that is positioned in back side of a floor member (10) includes a seat plate (11D) for mounting an operator's seat (14) and an equipment mounting part (11F) that rises upward from the right side of the seat plate (11D), and a right operating lever assembly (16) is provided in front of the equipment mounting part (11F). A controller accommodating space (21) is provided to be positioned in back side of a console (16A) of the right operating lever assembly (16) and between a side surface (11F1) of the equipment mounting part (11F) of the operator's seat mounting section (11) and the operator's seat (14), and a controller (27) is mounted in the controller accommodating space (21) to control various kinds of electric equipment.
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: March 17, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shogo Kimura, Hiroshi Tabeta
  • Patent number: 8967309
    Abstract: An upper revolving structure (3) includes a revolving frame (5), a floor member (9) which is provided on the revolving frame (5) and a front side of which serves as a footrest section (11) on which an operator rests his or her feet, a cab box (17) which forms an operating room (18) above the floor member (9), and an indoor unit (23) disposed on the floor member (9) to supply sucked air as conditioned air. A lower surface (11B) side of the footrest section (11) of the floor member (9) is formed as a unit mounting surface (12), and, as for the indoor unit (23), a box body (24) is disposed on the lower side of the unit mounting surface (12) and, in this state, the box body (24) is mounted on the unit mounting surface (12) by means of a plurality of bolts (32).
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: March 3, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shogo Kimura, Tomoyuki Tanaka, Hiroshi Tabeta, Hajime Ishii
  • Publication number: 20150056051
    Abstract: A control valve block is mounted on a bottom plate of a revolving frame through a control valve block mounting plate. In this case, a left support member and a right support member are provided on a back surface of the control valve block mounting plate at two spots with equal distances sandwiching a center position of gravity (G) of the control valve block. The left and right support members are mounted on a support beam provided on the bottom plate of the revolving frame. On the other hand, a weight-reducing part is provided at a part in the bottom plate of the revolving frame away from the support beam. The control valve block which is a heavy article is stably supported on the bottom plate at two spots sandwiching its center position of gravity (G). Moreover, the weight of the revolving frame can be reduced by the weight-reducing part.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 26, 2015
    Inventors: Yohei IWAMOTO, Junya KAWAMOTO, Osamu KOKURYOU, Hiroshi TABETA
  • Patent number: 8950801
    Abstract: A floor member comprises a lever-pedal mounting part in a front side, an operator's seat mounting part in a rear side, an indoor unit mounting surface part on which an indoor unit is mounted under the operator's seat mounting part, an entrance surface part which is provided in a door side between the indoor unit mounting surface part and the lever-pedal mounting part and on which an operator places a foot at getting-in/off, and a foot rest part which is surrounded by the lever-pedal mounting part, the indoor unit mounting surface part and the entrance surface part. The indoor unit mounting surface part and the entrance surface part form a successive plane successively extending with each other in a position lower by one step than the lever-pedal mounting part and the foot rest part.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: February 10, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroshi Tabeta, Shogo Kimura
  • Patent number: 8944493
    Abstract: On a seat base (11) of a floor member (10), a rear surface plate (11C), an operator's seat mounting plate (11D) on which an operator's seat (17) is mounted at a position higher than a footrest area (12) on which the foot is placed, and a duct accommodating space (14) formed in the vertical direction among the rear surface plate (11C), the operator's seat mounting plate (11D), and a rear position (12B) of the footrest area (12) are provided. An indoor air inlet duct (23) having the front surface side opened as a filter fitting hole (25) and introducing air in an occupying space (21) toward an indoor unit (22) of an air-conditioning unit is provided on the duct accommodating space (14). An indoor air filter (26) for catching dusts in the air is provided on the filter fitting hole (25) of the indoor air inlet duct (23).
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: February 3, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shogo Kimura, Tomoyuki Tanaka, Hiroshi Tabeta
  • Patent number: 8925663
    Abstract: An upper revolving structure is provided with a revolving frame, a floor member, and a cab box. On this, an indoor unit for an air conditioner is provided on the floor member, and an outdoor air inlet port is provided by being opened to the outside of the cab box. An outdoor air duct is provided for supplying outdoor air introduced through the outdoor air inlet port toward the indoor unit. In this duct, an intermediate portion is arranged at a high position on the side of an operator's seat, and on this intermediate portion, a filter accommodating portion is provided by being opened into the cab box. In the filter accommodating portion, an outdoor air filter for trapping dusts in the outdoor air flowing through the outdoor air duct is accommodated capable of being attached and removed.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: January 6, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroshi Tabeta, Shogo Kimura, Yasuo Ooshima
  • Publication number: 20140306488
    Abstract: Provided is a pilot valve attachment structure of a construction machine which can reduce an oppressive sensation that an operator sitting on an operator's seat may feel. The present invention is provided in a compact excavator having a travel operation device 11 including a pilot valve 18, and configured such that the pilot valve 18 is attached to a floor plate 15, wherein a recessed part 20 having a hole 20b, into which a casing 18a forming an outer frame of the pilot valve 18 can be inserted, on a bottom part 20a thereof is provided on the floor plate 15, the casing 18a of the pilot valve 18 is attached to the bottom part 20a of the recessed part 20 in a state where the casing 18a of the pilot valve 18 is inserted into the hole 20b of the recessed part 20, and a mat shaped seal member 21 for sealing a space that is formed around the casing 18a of the pilot valve 18 when the casing 18a is inserted into the hole 20b of the recessed part 20.
    Type: Application
    Filed: October 2, 2012
    Publication date: October 16, 2014
    Inventors: Tomoyuki Tanaka, Hiroshi Tabeta
  • Patent number: D752112
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: March 22, 2016
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shigehisa Hagura, Tomoyuki Miyata, Kazuhiko Hiraoka, Hiroshi Tabeta, Keiji Ahiko, Junya Kawamoto, Tomoyuki Tanaka
  • Patent number: D752113
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: March 22, 2016
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shigehisa Hagura, Tomoyuki Miyata, Kazuhiko Hiraoka, Hiroshi Tabeta, Keiji Ahiko, Junya Kawamoto, Ryozo Fujikawa