CRANE Russian patent published in 2017 - IPC B66C23/00 

FIELD: transportation.

SUBSTANCE: crane includes a base (12) to position the crane (10), a main beam (14) pivotally connected with the specified base (12), an articulated member (16) pivotally connected to the main beam (14), a drive cylinder (30) to move the specified main beam (14) relative to the base (12), the second actuator cylinder (30) to move the articulated beam (16) relative to the main beam (14) and a pressure cylinder (54) connected to one drive cylinder (30), configured to follow this driving cylinder (30) to create pressure for the second drive cylinder (30). The said pressure cylinder (54) is configured to form a substantially coaxial multi-chamber cylinder (26) with a driving cylinder (30) following it.

EFFECT: simplifying the design of the crane.

13 cl, 9 dwg