Caterpillar Sarl

Yujiro Yukimura

Shigeru Abe

Yuya Kanenawa

Kenichi Yokota

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.

Growing community of inventors

Tokyo, Japan

Yujiro Yukimura