Kabushiki Kaisha Komatsu Seisakusho

Komatsu Corporation

Toshio Yokoyama

Yukio Moriya

Takumi Onoda

Fujitoshi Takamura

Takeshi Kobayashi

Hiroshi Sawada

Shigeru Kinoshita

Seiichi Fuchita

Seiya Haga

Kimio Nishida

Kouichi Kawamura

Hajime Katou

Yuuichi Nagahiro

A construction machine comprises a lower traveling body and an upper revolving body rotatably attached to the lower traveling body via a revolving mechanism, wherein a rear surveillance camera is arranged on a back surface side of the upper revolving body between a counter weight of the upper revolving body and a swing circle of the revolving mechanism, and right and left crawler end portions of the lower traveling bodycan be simultaneously visually checked by means of the rear surveillance camera.

Construction machine

A travel motor hydraulic control system for a construction machine having a plurality of hydraulic pumps which supply individually pressurized fluid for a plurality of hydraulic travel motors and a plurality of flow control valves which control the flow rate of the pressurized fluid to be supplied to the motor during an ordinary work. A controller receives a control signal representative of a travel control lever stroke sensed by a position sensor and a control signal detected by a pressure sensor, determines if the vehicle is traveling up a slope, and transmits a command signal to a solenoid operated valve to move a pilot operated shut off valve toward a valve-closing position, thereby the travel hydraulic motors are individually supplied the pressurized fluid from the hydraulic pumps.

Travel motor hydraulic control system for a construction machine

A vehicle such as bull-dozer provided with a blade comprises a vehicle body having an operation room and is provided with a forward portion monitoring apparatus such as television camera set for picking up an image of a forward portion of a blade, and a display device on which an image of the forward portion of the blade monitored by the forward monitoring apparatus is displayed and the displayed image is observed in an operation room of the vehicle.

Vehicle having apparatus for monitoring forward portion of blade and method of monitoring forward portion of blade

Apparatus for controlling straight excavating operation with hydraulic

Hydraulically-operated equipment such as travelling equipment or working equipment for use in construction machinery such as a power shovel, shoveldozer and bulldozer. The hydraulically-operated equipment comprises a hydraulic driving mechanism actuated by hydraulic pressure, a hydraulic pressure supplying device for supplying hydraulic pressure to a hydraulic pipeline system for the hydraulic driving mechanism and a controller for controlling the hydraulic pressure supplying device such that the supplying rate at which hydraulic pressure is supplied to the hydraulic pipeline system according to the supply of hydraulic pressure is decreased in a specified period after a dead zone period in which hydraulic pressure starts to rise. This arrangement prevents an operational lag in the hydraulic driving mechanism as well as a shock at the time of start-up and shut-down.

Growing community of inventors

Uji, Japan

Toshio Yokoyama