Patents by Inventor Motoki Kurohara

Motoki Kurohara 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: 6619576
    Abstract: An outlet clearance adjustment mechanism of a jaw crusher, which is small in size, simple in structure, and capable of reducing outlet clearance adjusting time, is provided. For this purpose, the outlet clearance adjustment mechanism includes a toggle block (30) having a downward inclined plane (31), a toggle block frame (32) having a mounting surface (33) on which the toggle block (30) is slidably mounted and an inclined plane (34) provided to oppose the downward inclined plane (31), a detachable clearance adjustment shim (36) provided between the opposing downward inclined plane (31) and the inclined plane (34), and the hydraulic type of mechanical lock cylinder (40) provided at a back side of the inclined plane (34) of the toggle block frame (32).
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: September 16, 2003
    Assignee: Komatsu Ltd.
    Inventors: Ryoichi Togashi, Motoki Kurohara, Mitsunobu Yamada
  • Patent number: 6419172
    Abstract: A mobile crusher, which has a high-quality controlling function enabling an efficient production, and which is capable of preventing the crusher itself from being damaged, is provided. For this purpose, a mobile crusher having a feeder (3) and a crusher member (4) which are set drivably on a mobile vehicle body (1), includes means (7) for detecting an amount of a material to be crushed, which detects an amount (H) of a material (6a) to be crushed inside the crusher member (4), and control means (10) for receiving the amount H from the means (7) for detecting the amount of the material to be crushed and controlling a driving speed V of the feeder (3) changeably based on the reception amount H.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: July 16, 2002
    Assignee: Komatsu Ltd.
    Inventors: Kazuyuki Yamazaki, Satoru Koyanagi, Yasutaka Nishida, Katsuhiro Ikegami, Tooru Nakayama, Motoki Kurohara
  • Publication number: 20020036246
    Abstract: An outlet clearance adjustment mechanism of a jaw crusher, which is small in size, simple in structure, and capable of reducing outlet clearance adjusting time, is provided. For this purpose, the outlet clearance adjustment mechanism includes a toggle block (30) having a downward inclined plane (31), a toggle block frame (32) having a mounting surface (33) on which the toggle block (30) is slidably mounted and an inclined plane (34) provided to oppose the downward inclined plane (31), a detachable clearance adjustment shim (36) provided between the opposing downward inclined plane (31) and the inclined plane (34), and the hydraulic type of mechanical lock cylinder (40) provided at a back side of the inclined plane (34) of the toggle block frame (32).
    Type: Application
    Filed: September 14, 2001
    Publication date: March 28, 2002
    Applicant: KOMATSU LTD.
    Inventors: Ryoichi Togashi, Motoki Kurohara, Mitsunobu Yamada
  • Patent number: 6354524
    Abstract: A self-propelling crushing machine comprises a machine body (2) provided with a travelling body (1); a hopper (4), a feeder (5), a selective feeder (6) and a crusher (3) which mounted to the machine body; a conveyer (7) disposed below the machine body; and a controlling device for independently controlling the feeder, the selective feeder, the crusher and the conveyer, wherein the feeder conveys a material to be crushed in the hopper to the selective feeder, the selective feeder selects the material to be crushed conveyed by the feeder so as to fall down soil, shingle and the like and convey large rock to the crusher, and the conveyer discharges the selected soil, shingle and the like and material pieces crushed by the crusher.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: March 12, 2002
    Assignee: Komatsu Ltd.
    Inventors: Tooru Nakayama, Teruo Nakahara, Kazuhiro Yoshida, Mitsunobu Yamada, Motoki Kurohara, Satoru Koyanagi, Katsuhiro Ikegami
  • Patent number: 5730373
    Abstract: There is provided a crusher system drive control apparatus for a traveling type crushing machine including a vehicle body that is equipped with a traveling body and that has mounted thereon a crusher system including a feeder, a crusher and a belt conveyer, which drive control apparatus comprises an abnormal condition detecting means for sensing an abnormal stop of the said belt conveyer, and an operation terminating means in response to a detection signal that is output by the said abnormal condition detecting means for stopping an operation of each of the said feeder and the said crusher.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: March 24, 1998
    Assignee: Komatsu Ltd.
    Inventors: Yukio Tamura, Yasutaka Nishida, Masaho Yamaguchi, Motoki Kurohara, Toru Nakayama