Kubota Corporation

Kyb Corporation

Toshiaki Otani

Masahiro Yamamoto

Hiroshi Horii

Yoshimitsu Tanaka

Teruo Kunizawa

Yuji Kawano

Akio Matsuura

Takayuki Tokuda

Shoichi Kawano

Tsukasa Haraguchi

Hisayuki Hiramatsu

Masaru Kumatani

Hitoshi Iwamura

Kunihiko Bito

Junki Maeda

Takehiro Wakasugi

A hydraulic system for a work machine includes a first switch valve and a first return circuit. The first switch valve is switchable between a confluent position and an isolation position. The first switch valve is switched to the confluent position such that a first operation fluid tube is connected to a second operation fluid tube and a first transmission fluid tube is connected to a second transmission fluid tube. The first switch valve is switched to the isolation position such that the first operation fluid tube is disconnected from the second operation fluid tube and the first operation fluid tube is disconnected from the second operation fluid tube.

Hydraulic system for work machine

A working machine rendered to change in setting a maximum value of an absorption torque of hydraulic pump to a rather high value when the working machine is in a specified state, solves problems that, when an operation lever is being operated in an intermediate position of a lever stroke, there occurs a swinging in a machine body due to change-over of a maximum absorption torque setting value so that the operation lever is relatively moved with respect to the machine body to exert an influence on operability and the machine body acting violently. When the maximum absorption torque setting value is E2 position which is good fuel efficiency, upon detection of a full operation of either one or both of the travelling operation member and the boom operation member, controlling to automatically switch to E1 position of a maximum absorption torque larger than that of E2 position is performed.

Working machine with variable displacement hydraulic pump

Portion of operation grip for machine

Growing community of inventors

Sakai, Japan

Toshiaki Otani