Kabushiki Kaisha Komatsu Seisakusho

Kazuo Ootsuka

Takayasu Inui

Michiaki Igarashi

Saburo Nogami

Toshiaki Horikoshi

Kazuhiro Izumi

A semi-automatic hydraulic excavator capable of automatically controlling arm and bucket angles when bringing the bucket back to the original excavation posture after completion of dumping excavated soil. For this purpose, arm and bucket angle detectors are provided therein and the automatic control is performed by negatively feeding back values detected by these detectors to minimize deviations between these values and preset values produced from arm and bucket angle setters corresponding to the arm and bucket angles in the original excavation posture. The automatic control mode is selected by a signal from an automatic control command signal producing circuit. With this system, the bucket is swiftly brought back to the original excavation posture from the dumping posture without requiring much operator's skill and efforts.

Growing community of inventors

Hirakata, Japan

Kazuo Ootsuka