Abstract: A multi-function directional handle with control elements mounted for turning in both directions is arranged as a single structural unit, in which unit an axially supported control spoke with hand-grippable, individually movable control levers at its ends is provided adjustably fixed in a position within the region of grip in front of the driver's seat of a construction machine. The control levers each define an opening, wherein finger-displaceable dump lever is mounted in each such opening, the axes of swing of the control and dump levers extending, approximately parallel, to the pivot axes of the controlled tool parts, and the direction of turn of the human control movements agreeing with that of the movements controlled.

Abstract: Method and apparatus for the remote-controlled connecting or separating of two coupling parts each of which is provided with mechanical form-lock elements and with control-line connectors, one of which parts is provided on the working tool and the other on the dipper stick or the like of a hydraulic excavator, which parts can be connected in force-locked manner by a hydraulic-mechanical locking device, each connecting or separating process comprising two successive individual processes.

Abstract: Arrangement for swinging an attachment holder for the equipment of a hydraulic excavator around an axis perpendicular to the platform plane of the upper carriage, in a working direction parallel to the longitudinal direction of the excavator chassis. The lower part of the boom is vertically swingably fastened to the attachment holder which in turn is pivoted to the upper carriage by two radial links which are mounted at each end for turning around a vertical axis. The upper carriage is pivoted to the chassis. Furthermore the attachment holder is operatively connected to an active setting member. It is the pivoting of the carriage relative to the chassis together with the pivoting of the attachment holder relative to the carriage which enables the movement of the attachment holder in a working direction parallel to the longitudinal direction of the excavator chassis.