Abstract: A high-performance chain scraper conveyor is equipped with symmetrical channel belts and with a chain conveyor which can turn around corresponding axles so that in combination with the corresponding shape of the channel belts a considerably longer life and higher capacity can be achieved. The ends of the individual channel belts are equipped with overlap tongues and abutting areas across the entire width of the channel diagonally to the transport direction so that the result is an extremely quiet, highly efficient operation. The unit, therefore, is clearly more economical. Channel and herringbone chain conveyors are fully symmetrical over three axles. This means they can be turned separately or together and have at least twice the life of customary chain scraper conveyors. FIG. 3 is to be used for publication.

Abstract: For use in underground mining, in particular coal mining, a chain belt is provided, which consists of the standard vertical links and horizontal links which preferably have double helical surfaces. These horizontal links with the double helical surfaces are connected to a symmetrically constructed pusher, whereby either the base and the guide shoes, or only the base are shaped symmetrically. The symmetry plane is exactly in the center, when viewed in conveying direction, so that such a pusher can be reversed either in relation to the base or in its entirety, or together with the entire chain belt. This results in much higher lifespans.

Abstract: For use especially in underground mining and tunnel construction, a steel link chain is provided that is composed of vertical and horizontal links and pushers. The vertical and horizontal links are formed by two parallel chain link arms and by chain link arches connecting them. The chain link arches are designed in a concave shape in the mutual roll-off area so that a surface contact is achieved. In addition, the chain link arches of the horizontal links have horizontally and vertically extending arrow surfaces that enable a safe surface contact in the area of the chain wheel that is constructed as a double helical wheel. The horizontal links furthermore are constructed in the area of the chain link arms like a groove, so that a form-fitting connection with the pusher is achieved, contributing to a significant improvement of operating characteristics and longer service lives.

Abstract: Chain webs for chain conveyors, which are primarily used in underground mining and in tunnel building for the transport of large quantities of materials, consist of mutually engaging horizontal and vertical chain links in which the horizontal links of the two adjacent chains are joined by a one or two-piece bracket running across their longitudinal direction, sufficiently raised above them and having a reversible tooth shape. This results in a kind of toothed chain providing the optimum power transmission from the chain wheel to the chain web, where both chains run exactly in the middle of the belt, as is usual in double-centered chain conveyors. The special shape of the reversible teeth makes it possible to use such a chain web on both sides and to move it forwards and backwards without any risk.