Excavator with extendable outer arm including synchronizing...

Details Excavator with extendable outer arm including synchronizing... Excavator with extendable outer arm including synchronizing...

E - Fixed Constructions

02

F

214/30

E02F 3/34 (2006.01) E02F 3/30 (2006.01)

Patent

CA 2014164

An excavator comprising a movable body, a boom mounted on the movable body, first hydraulic cylinders, an outer arm pivotally mounted on the boom, a second hydraulic cylinder mounted on a rear surface of the boom, an inner arm inserted into the outer arm and movable telescopically relative to the outer arm, a bucket connected to the tip end of the inner arm, a bucket cylinder provided between the bucket and a guide mechanism, the guide mechanism being slidably mounted on guide plates fixed to the outer arm, a third hydraulic cylinder connected to a base end of the outer arm and having a rod connected to a central portion of the inner arm for moving the inner arm relative to the outer arm, and a synchronizing device for moving the base end of the outer arm for a length corresponding to the distance the inner arm moves relative to the outer arm. A hook mechanism can be mounted at a front portion of the inner arm. An interlocking device can be connected between the guide mechanism and the front portion of the inner arm.

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