Kabushiki Kaisha Komatsu Seisakusho

Shingo Kobayashi

Masahiro Watanabe

Takeo Kato

Tetsuji Funabashi

Kiyoshi Kaneko

Kazuo Takagi

A desired speed stage is preselected and at a time when a car speed reaches a speed commensurate with the preselected speed stage, a present speed stage is changed to the preselected speed stage.

Electronically controlled automatic speed changing apparatus

A blade control device comprises a change-over switch for providing light receiving position deviation signal sent out from a light receiving device into a light receiving device control system as a command value, and a device for measuring the change in the height of the light receiving device, whereby a topographic survey is conducted based on the height change of the light receiving device. The blade control device may further be provided with a second change-over switch for providing the command value outputted from a manual command value setter during a manual operation into the light receiving device control system, whereby returning the blade to a previous position is carried out in accordance with the operation of the second change-over switch. Further, the blade position can be determined by providing an adder for adding light receiving position deviation and the operation stroke of the lift cylinder at a light receiving time and a detector for detecting the deviation between the added result by the adder and the operation stroke of the lift cylinder at the current time, and by reducing the deviation to zero.

Growing community of inventors

Hiratsuka, Japan

Shingo Kobayashi