Patent ID: 7419023

Claim:
A transfer apparatus comprising a support base and an operator cabin articulated at a movable and travelable boom, wherein the boom consists of at least first and second partial booms which are connected to one another via a connection piece, wherein the first partial boom is a telescopic boom having a distal end portion and a proximal end portion, the telescopic boom having a telescopic section adapted to project from the distal end portion of the telescopic boom, the telescopic section connected to the operator cabin, the operator cabin being articulated pivotably at the telescopic boom about a pivot point by a first piston-in-cylinder arrangement between the telescopic section and the operator cabin, the proximal end portion of the telescopic boom being articulated pivotably about a pivot point with respect to the second partial boom by a second piston-in-cylinder arrangement at the connection piece, wherein the first and second piston-in-cylinder arrangements interact with one another such that a displaced oil volume from the first piston-in-cylinder arrangement is transported into the second piston-in-cylinder arrangement to produce a same lift length there such that the same angular change results with the telescopic boom and the operator cabin, wherein the second partial boom includes a parallel connecting rod transmission movable via a third piston-in-cylinder arrangement.