Patents by Inventor Hironori Yamamitsu

Hironori Yamamitsu 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: 20240101199
    Abstract: A work vehicle includes a vehicle body frame, a cab disposed on an upper side of the vehicle body frame, brackets connected to the cab, limiting sections and buffering devices. The limiting sections are disposed between the brackets and the vehicle body frame. The limiting sections limit a movement range of the cab with respect to the vehicle body frame. The buffering devices are disposed between the brackets and the vehicle body frame.
    Type: Application
    Filed: July 31, 2023
    Publication date: March 28, 2024
    Inventors: Souichirou MURAKAMI, Hirofumi KOTAKI, Daisuke OKAMOTO, Kouji NAGAMI, Yohei TAKAHASHI, Osamu YATSUDA, Hironori YAMAMITSU
  • Patent number: 11001987
    Abstract: A cab is used in a work machine. The cab includes a first pillar, a second pillar disposed to a rear of the first pillar, a beam disposed between the first pillar and the second pillar, and a reinforcing member provided to the beam.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: May 11, 2021
    Assignee: KOMATSU LTD.
    Inventors: Hironori Yamamitsu, Naozumi Okura, Masamichi Miyazaki, Takashi Tsukamoto
  • Publication number: 20200109537
    Abstract: A cab is used in a work machine. The cab includes a first pillar, a second pillar disposed to a rear of the first pillar, a beam disposed between the first pillar and the second pillar, and a reinforcing member provided to the beam.
    Type: Application
    Filed: October 2, 2019
    Publication date: April 9, 2020
    Inventors: Hironori YAMAMITSU, Naozumi OKURA, Masamichi MIYAZAKI, Takashi TSUKAMOTO
  • Patent number: 9856996
    Abstract: An exhaust gas treatment unit includes an exhaust gas treatment device, a bracket and a connecting pipe. The exhaust gas treatment device is mounted on a bracket. The connecting pipe is connected to the exhaust gas treatment device. The connecting pipe directs exhaust gas to the exhaust gas treatment device. The connecting pipe may include a supporting portion and a pipe portion, with the supporting portion supporting the bracket and the pipe portion being integrated with the supporting portion. Alternatively, the exhaust gas treatment unit may further include a supporting member having a supporting portion supporting the bracket and a pipe portion integrated with the supporting portion, with the pipe portion connected to the connecting pipe.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: January 2, 2018
    Assignee: KOMATSU LTD.
    Inventors: Taira Ozaki, Hiroshi Nakagami, Hironori Yamamitsu, Kanji Namimatsu, Hiroshi Ohta, Kenji Matsubara
  • Patent number: 9347350
    Abstract: An engine unit includes an engine, an exhaust gas treatment device and a connecting pipe. The engine has an exhaust gas port. The exhaust gas treatment device is arranged above the engine. The connecting pipe connects the exhaust gas port and the exhaust gas treatment device. The connecting pipe has an expandable-contractible bellows portion. The bellows portion has a linear form following the upward-downward direction. The lower end portion of the bellows portion is positioned lower than at least a part of the exhaust gas port.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: May 24, 2016
    Assignee: KOMATSU LTD.
    Inventors: Taira Ozaki, Hiroshi Nakagami, Hironori Yamamitsu, Kanji Namimatsu, Hiroshi Ohta, Kenji Matsubara
  • Patent number: 9145806
    Abstract: An exhaust treatment unit for a work vehicle includes a selective catalytic reduction apparatus, a connection pipe, an ejection apparatus attached to the connection pipe, a first pipe section that guides coolant to the ejection apparatus, a second pipe section that discharges coolant from the ejection apparatus, first and second retaining sections, and a coolant pump. The ejection apparatus ejects reducing agent into exhaust supplied to the selective catalytic reduction apparatus. The first and second retaining sections retain coolant and are connected to the first and second pipe sections above the ejection apparatus, respectively. The coolant pump is driven by an engine driving force and supplies the coolant to the ejection apparatus via the first pipe section. The first and second pipe sections extend upward from first and second connecting sections of the first and second pipe sections and the ejection apparatus toward the first and second retaining sections, respectively.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: September 29, 2015
    Assignee: KOMATSU LTD.
    Inventors: Hiroshi Nakagami, Taira Ozaki, Hironori Yamamitsu, Takashi Katou, Yoshihisa Fujimoto
  • Publication number: 20150078967
    Abstract: An exhaust treatment unit for a work vehicle includes a selective catalytic reduction apparatus, a connection pipe, an ejection apparatus attached to the connection pipe, a first pipe section that guides coolant to the ejection apparatus, a second pipe section that discharges coolant from the ejection apparatus, first and second retaining sections, and a coolant pump. The ejection apparatus ejects reducing agent into exhaust supplied to the selective catalytic reduction apparatus. The first and second retaining sections retain coolant and are connected to the first and second pipe sections above the ejection apparatus, respectively. The coolant pump is driven by an engine driving force and supplies the coolant to the ejection apparatus via the first pipe section. The first and second pipe sections extend upward from first and second connecting sections of the first and second pipe sections and the ejection apparatus toward the first and second retaining sections, respectively.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 19, 2015
    Inventors: Hiroshi Nakagami, Taira Ozaki, Hironori Yamamitsu, Takashi Katou, Yoshihisa Fujimoto
  • Patent number: 8875824
    Abstract: A radiator grill is mounted on a work vehicle and includes a frame and a plate member. The plate member is supported by the frame and having a plurality of through-holes aligned in a first direction and a second direction orthogonal to the first direction. Each of the through-holes has a pair of circular parts aligned in the first direction, and an interconnecting part having a width in the second direction that is smaller than diameters of the circular parts, the interconnecting part interconnecting the circular parts. The through-holes are disposed alternately so that one of the circular parts of one of two adjacent ones of the through-holes adjacent to each other in the second direction is aligned with the interconnecting part of the other of the two adjacent ones of the through-holes in the second direction.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: November 4, 2014
    Assignee: Komatsu Ltd.
    Inventors: Hironori Yamamitsu, Kazuki Kure, Hiroshi Nakagami, Taira Ozaki
  • Publication number: 20140290781
    Abstract: An exhaust gas treatment unit includes an exhaust gas treatment device, a bracket and a connecting pipe. The exhaust gas treatment device is mounted on a bracket. The connecting pipe is connected to the exhaust gas treatment device. The connecting pipe directs exhaust gas to the exhaust gas treatment device. The connecting pipe may include a supporting portion and a pipe portion, with the supporting portion supporting the bracket and the pipe portion being integrated with the supporting portion. Alternatively, the exhaust gas treatment unit may further include a supporting member having a supporting portion supporting the bracket and a pipe portion integrated with the supporting portion, with the pipe portion connected to the connecting pipe.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Applicant: KOMATSU LTD.
    Inventors: Taira Ozaki, Hiroshi Nakagami, Hironori Yamamitsu, Kanji Namimatsu, Hiroshi Ohta, Kenji Matsubara
  • Publication number: 20140291057
    Abstract: In the engine compartment of a bulldozer the radiator is arranged forward of the engine. An exhaust gas treatment unit is arranged above the engine. A first exhaust gas treatment device of the exhaust gas treatment unit is arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. A second exhaust gas treatment device of the exhaust gas treatment unit is positioned to the side of the first exhaust gas treatment device, and arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. The air cleaner is arranged between the radiator and the exhaust gas treatment unit in the forward-backward direction of the vehicle.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Inventors: Hiroshi Nakagami, Taira Ozaki, Hironori Yamamitsu
  • Publication number: 20140290220
    Abstract: An engine unit includes an engine, an exhaust gas treatment device and a connecting pipe. The engine has an exhaust gas port. The exhaust gas treatment device is arranged above the engine. The connecting pipe connects the exhaust gas port and the exhaust gas treatment device. The connecting pipe has an expandable-contractible bellows portion. The bellows portion has a linear form following the upward-downward direction. The lower end portion of the bellows portion is positioned lower than at least a part of the exhaust gas port.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Applicant: KOMATSU LTD.
    Inventors: Taira Ozaki, Hiroshi Nakagami, Hironori Yamamitsu, Kanji Namimatsu, Hiroshi Ohta, Kenji Matsubara
  • Patent number: 8827029
    Abstract: In the engine compartment of a bulldozer the radiator is arranged forward of the engine. An exhaust gas treatment unit is arranged above the engine. A first exhaust gas treatment device of the exhaust gas treatment unit is arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. A second exhaust gas treatment device of the exhaust gas treatment unit is positioned to the side of the first exhaust gas treatment device, and arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. The air cleaner is arranged between the radiator and the exhaust gas treatment unit in the forward-backward direction of the vehicle.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: September 9, 2014
    Assignee: Komatsu Ltd.
    Inventors: Hiroshi Nakagami, Taira Ozaki, Hironori Yamamitsu