O&k Orenstein & Koppel Aktiengesellschaft

Udo Hahlbrock

Siegfried Steinkuhler

Ulrich Wantig

Johann-Gustav Voss

Heinz-Werner Vagt

The device comprises an undercarriage extending transversely of the working direction of the device, and supported, at its opposite ends, by respective pairs of worms with the worms of each pair rotating in respective opposite directions. A cantilever bracket is mounted on the forward side of the undercarriage, considered in the working direction. A plurality of conveyor troughs are mounted, for pivoting about a horizontal axis, on the forward edge of the undercarriage, and respective hydraulic actuators are connected between each trough and the cantilever bracket, so that the troughs, which are inclined rearwardly and upwardly, may be adjusted with respect to their angular orientation. Struts extending rearwardly from the undercarriage connect the undercarriage to a third driving unit which may comprise either a pair of oppositely rotating worms having their axes extending in the working direction or two laterally spaced pairs of worms. A respective endless scraper chain extends along each trough, and each trough has a cutting tool at its lower forward end. At the upper rearward end of the conveyor trough the cut material is discharged into transversely extending endless conveyors which convey the material to an upwardly and rearwardly extending inclined endless belt covered by an endless cover belt. The endless conveyor belt delivers the material to an inclined classifying screen above which there is arranged a pressure water supply. The undesired material drops through the screen while the desired material slides over the screen into a hopper leading to an elevator. The several pairs of worms provide essentially a three-point support for the device.

Self-propelled pickup device for picking up materials lying on the

A device for embedding objects such as continuous pipes into water bottoms comprises a support frame which is movable along the bottom on a drive track which is carried adjacent one side thereof. The support frame also carries a plurality of guide and drive rollers which are engageable with the object to be embedded and which engage the object to move the support frame along the object as the drive track advances along the water bottom. A bottom trenching device in the form of a ground mill with a rotatable cutting head is pivotally mounted on a support between the drive rollers and the drive track and it operates on the bottom to remove material therefrom to form a trench. The material may be subsequently directed backwardly over the object to be embedded after it is positioned in the trench.

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Hannover, Germany

Udo Hahlbrock