Patents by Inventor Yujiro Yukimura

Yujiro Yukimura 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).

  • Quick coupler control device for working machine
    Patent number: 10113292
    Abstract: In a control device, a pilot-operated first check valve connects a solenoid-operated first directional control valve to a lock side chamber of a lock cylinder installed in a quick coupler. A pilot-operated second check valve is connected to the lock cylinder unlock side chamber, a solenoid-operated second directional control valve connected between the second check valve and the first directional control valve. The first and second directional control valves are controlled by a controller with processed signals input from a mode selector switch, first sensor detecting a buck closing pilot pressure, and second sensor detecting a bucket closing working pressure.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: October 30, 2018
    Assignee: Caterpillar SARL
    Inventors: Kenichi Yokota, Shigeru Abe, Yuya Kanenawa, Yujiro Yukimura
  • Quick Coupler Control Device for Working Machine
    Publication number: 20170030047
    Abstract: In a control device, a pilot-operated first check valve connects a solenoid-operated first directional control valve to a lock side chamber of a lock cylinder installed in a quick coupler. A pilot-operated second check valve is connected to the lock cylinder unlock side chamber, a solenoid-operated second directional control valve connected between the second check valve and the first directional control valve. The first and second directional control valves are controlled by a controller with processed signals input from a mode selector switch, first sensor detecting a buck closing pilot pressure, and second sensor detecting a bucket closing working pressure.
    Type: Application
    Filed: April 8, 2015
    Publication date: February 2, 2017
    Applicant: Caterpillar SARL
    Inventors: Kenichi Yokota, Shigeru Abe, Yuya Kanenawa, Yujiro Yukimura