Kabushiki Kaisha Komatsu Seisakusho

Tatsumi Tada

Naoki Ishizaki

Sadao Nunotani

Kazuo Uehara

Shuki Akushicki

A hydraulic control apparatus has at least two meter-in and two meter-out poppet valves. In order to be compact and deal with a great flow rate, the apparatus is arranged such that a pair of meter-in poppet valves and load check valves are located in an upper horizontal plane, a pair of meter-out poppet valves and solenoid-actuated pilot valves are located in a lower horizontal plane, and a pair of a pilot valve associated with the meter-out poppet valve and a reducing valve associated with the meter-in poppet valve are located in a middle horizontal plane and are respectively disposed in opposed relationship to each other, and the load check valve is vertically located in parallel relationship with the meter-out poppet valve.

Growing community of inventors

Kawasaki, Japan

Tatsumi Tada