Kabushiki Kaisha Komatsu Seisakusho

Masayuki Moriyama

Hikosaburo Hiraki

Noboru Kanayama

A hydraulic excavator includes a boom comprising an articulated first and second boom member, an arm, a bucket, a boom cylinder for operating the boom, an arm cylinder for operating the arm; and a bucket cylinder for operating the bucket. The boom cylinder is cooperatively associated with the boom to establish a geometry wherein, during operation, the axis of the boom cylinder can never pivot rearwardly across a dead point of the boom and therefore eliminate the possibility of dead locking of the boom during operation.

Growing community of inventors

Kanagawa, Japan

Masayuki Moriyama