Patents by Inventor Chuka Sho

Chuka Sho 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).

  • Control valve apparatus of power shovel
    Patent number: 9702378
    Abstract: A control valve apparatus includes a second-working-actuator acceleration control valve connected to a first working control valve in parallel. The second-working-actuator acceleration control valve includes pilot chambers receiving a pilot pressure for switching first and second working control valves and a flow channel that guides a pressure fluid of a first pump port to an entrance port side of the second working control valve. The second-working-actuator acceleration control valve is switchable between a first priority position in which a pressure fluid is guided to the first working control valve with a higher priority than the second working control valve and a second priority position in which a pressure fluid is guided to the second working control valve with a higher priority than the first working control valve.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: July 11, 2017
    Assignee: KYB Corporation
    Inventors: Takeshi Fujiwara, Masayuki Nakamura, Chuka Sho
  • CONTROL VALVE APPARATUS OF POWER SHOVEL
    Publication number: 20150089935
    Abstract: A control valve apparatus includes a second-working-actuator acceleration control valve connected to a first working control valve in parallel. The second-working-actuator acceleration control valve includes pilot chambers receiving a pilot pressure for switching first and second working control valves and a flow channel that guides a pressure fluid of a first pump port to an entrance port side of the second working control valve. The second-working-actuator acceleration control valve is switchable between a first priority position in which a pressure fluid is guided to the first working control valve with a higher priority than the second working control valve and a second priority position in which a pressure fluid is guided to the second working control valve with a higher priority than the first working control valve.
    Type: Application
    Filed: March 18, 2013
    Publication date: April 2, 2015
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Takeshi Fujiwara, Masayuki Nakamura, Chuka Sho