Caterpillar Sarl

Hiroshi Maeda

Koichi Kiyasu

Shuhei Orimoto

To provide a drift-prevention valve device, a blade device, and a working machine capable of operating an actuated unit and preventing the machine body from drifting with a simple configuration. The drift-prevention valve device is provided with a non-return valvethat allows the flow of hydraulic oil from a control valveto a head chamberof a blade cylinderand blocks the flow of the hydraulic oil in the reverse direction; and a piston accommodation partseparately disposed from an accommodation partof the non-return valve, configured to movably accommodate a power piston. The power pistondefines a first piston chambercommunicating with a rod chamber ofof the blade cylinderand a second piston chamberfor drain positioned on a poppetside of the non-return valveand communicating with a tank. The power pistonis connected to the poppetof the non-return valve, so that the power pistoncan be operated by the difference between the urging force of the poppetby a springof the non-return valveand a rod chamber pressure of the blade cylinder

Growing community of inventors

Kako-gun, Japan

Hiroshi Maeda