Tadano Demag Gmbh

Terex Demag Gmbh

Terex Cranes Germany Gmbh

Achim Schütz

Thomas Krebs

Thilo Jene

Martin Bauer

Simon Schneider

Jürgen Appel

Traugott Feß

Johannes Untch

A vehicle crane having a telescoping jib, comprising a basic box with retractable and extendible inner boxes and a securing and locking unit that comprises a first adjusting cylinder and a second adjusting cylinder which are each designed as unilaterally acting hydraulic cylinders with a first spring element and a second spring element as well as a first line and a second line, where the first adjusting cylinder moves locking bolts between operating states of unbolted and bolted and the second adjusting cylinder moves driving bolts between operating states of secured and released. In the event of a malfunction, the first adjusting cylinder moves to the bolted operating state and the second adjusting cylinder moves to the released operating state.

Vehicle crane having a telescoping jib with a securing and locking unit

A hydraulic control circuit for the overcontrol of a hydraulic system which controls a drive, in particular for controlling a hydraulic motor () for driving a slewing gear of a crane superstructure, wherein the pressure lines () for the hydraulic motor () are connected by means of a supply piston () to a hydraulic pump () or a tank (), and the pressure lines () are each assigned pilot valves (), shuttle valves () and directional control valves (). The shuttle valves () are connected by means of control lines () to an activatable proportional pilot valve (), such that the separately activatable directional control valves () can thus be activated by means of said pressure, which is built up by the pilot valve ().

Hydraulic control circuit for overcontrol of a slewing gear drive

Growing community of inventors

Munich, Georgia

Achim Schütz