Abstract: The invention relates to a slide mount for telescopic parts, more particularly for crane jibs, including a slipper arranged between the sliding surface areas of the telescopic parts, the slipper being configured so that it is held in place by a wedge effect between the telescopic parts, and the slipper including on its inner and/or outer surface area longitudinal grooves receiving compensating, spacer elements, preferably, elongated strips.

Abstract: A telescopic jib includes a base part, and at least one telescopic part telescoped in the base part. A shift mechanism extends and retracts each telescopic part. The base part and each telescopic part includes an upper semi-box shaped section part, and at least one of the base part and the telescopic part includes a lower section part having shell segments adjoining each other. Each shell segment has an outwardly curved shape.

Abstract: A carriage is freely suspended, to be movable in all directions, from a cart movable along rails supported by a fixed coke guide car structure of a coke oven. The carriage has upper and lower drives which move grippers to grip the back of a door to be cleaned and to thus move the freely suspended carriage toward the door. Centering pieces on the carriage contact the edges of the door and center the carriage relative to the specific alignment of the door. The carriage carries a further drive which rotates spindles which cause cleaning instruments mounted thereon to move therealong to clean surfaces of the door.