Abstract: A digging wheel assembly includes a supporting wheel having a peripheral zone and a plurality of receiving elements affixed to the supporting wheel in the peripheral zone in a spaced, circumferential distribution. Each receiving element has a receiving pocket and a receiving slot. Digging tool components are disposed along the peripheral zone of the supporting wheel in a circumferential distribution. Each digging tool component is disposed between two circumferentially adjoining receiving elements; one being a leading receiving element and one being a trailing receiving element as viewed in the rotary working direction of the assembly. Each digging tool component has a leading part extending from a front end of the digging tool component in the rotary working direction and being accommodated in the receiving pocket of the leading receiving element.

Abstract: A device for crushing and screening bulk materials consists of a vertical impact mill with associated feeder, an air-charged separator, a discharge device for the final product and a conveyor for returning the insufficiently crushed bulk materials fraction to the crushing region. The vertical impact mill and the separator are arranged on a divided drive shaft, which can be coupled if necessary. The separator is arranged below the vertical impact mill and is designed as a distributor plate, possibly with guide blades. The air is introduced laterally or tangentially below the distributor plate. The finished materials fraction is discharged laterally or tangentially above the distributor plate and conveyed to separator (cyclone) which may be connected downstream. The insufficiently crushed bulk materials fractions are discharged through an outlet below the distributor plate in the base region of the separator.

Abstract: A method of and apparatus for decontaminating contaminated soils and similar materials, the method includes (a) drying and comminuting contaminated soil and similar material in a mill through which a flow of hot gases is passed to provide a mixture of solids and gases; (b) introducing the mixture into a cyclone separator where the mixture is separated into gaseous and solid components; (c) thermally treating the solid components in a decontamination zone at a temperature effective to decontaminate at least a portion of the solid components; (d) passing the solid components after thermally treating same in step (c) into a dwell zone configured as a flow-through region; (e) thermally treating the solid components within the dwell zone at a temperature effective to decontaminate at least a portion of the solid components; (f) cooling the solid components after step (e) by transferring same into a cooling region of a cooling line; (g) thermally afterburning gaseous components from at least one of steps (b) and (c

Abstract: A method and arrangement for reducing the circulation of salts in a cement kiln in which a raw meal heat exchanger feeds material to the kiln. A partial gas stream charged with harmful substances is removed from the kiln through a bypass conduit. The partial gas stream is subjected to a multi-stage process of removing dust. This process includes passing the partial gas stream through a first dust separating stage, followed by returning an uncooled dust component of the partial gas stream to the kiln and cooling the remaining portion of the partial gas stream. The cooled remaining portion of the partial gas stream is subjected to a further dust separating process, and thereafter passed through a further bypass conduit to a location of the raw meal exchanger, which location has a temperature at approximately the same level as the temperature of the remaining portion of the partial gas stream entering the further bypass conduit following the further dust separating process.

Abstract: An arrangement for loading and unloading a ship comprises a boom having an upper portion in the form of a continuous box girder attached to a portal. An upper trackway is supported on a forward region of the boom on top of the box girder. A platform is suspended from a rear region of the boom and has a lower trackway mounted thereon. A movable feed head including an associated supply and discharge device and having one end adapted for cooperating with a loading and unloading device in the forward region of the boom is mounted for moving on the upper and lower trackways. A pylon is attached to a top side of the box girder between the ends of the boom, the upper trackway terminating approximately at the pylon. Guide cables are fixed to the boom and supported by the pylon. A drive is disposed on the box girder in the forward region of the boom for displacing the feed head, and struts are arranged for fixing the feed head to the drive.

Abstract: A process and device for crushing bulk materials. The material to be crushed is fed from above to a first accelerating device which accelerates it into a first crusher, the fine particles in the crushed material produced by the first crusher being carried upwards by an air or gas stream. The larger particles trickle downwards and are then carried by an air or gas stream vertically upwards to another accelerating device which accelerates them into another crusher. The fine particles produced in the second crusher are swept upwards by the air or gas stream, while the larger particles trickle downwards and are brought round to the beginning of the cycle again. The invention concerns the combination of a vertical impact crusher with a separator, both of which are preferably located inside the same housing.

Abstract: A cutting wheel arrangement for a suction dredge includes a cutting wheel assembly provided with a plurality of cutting stirrups. A suction pipe is connected to a suction chamber arranged within the cutting wheel arrangement. The suction chamber has a suction opening in the suction area. The cutting wheel assembly includes two coaxially adjacent cutting wheels which are fixedly connected to each other and have lateral cutting openings. The suction chamber is separated by a center wall into two separate chamber portions. One of the suction chamber portions is located in the region of one cutting wheel and the other suction chamber portion is located in the region of the other cutting wheel. Each suction chamber portion is connected to the suction pipe through an opening which can be closed by means of an adjustable flap member in such a way that either the one or the other suction chamber portion is in communication with the suction pipe.

Abstract: An infinitely variable hydrostatic transmission drive for self-propelled machines having a plurality of transmission motors which are fed from a common displaceable transmission-drive pump, at least one variable displacement motor having a swashplate which can be swung back into a zero position and at least one fixed displacement motor are provided in hydraulic parallel circuit. The motors operate in at least one case via a common back gearing on a common output, a shift coupling being provided between the variable displacement motor and an output.

Abstract: A process and a device enable tubular straps to be pulled or guided through support roller stations. The strap is rolled until the diameter (D) of the roll is less than the operating diameter (D') and is held in this position by a clamping means which moves with it, such as a mesh sleeve. The desired diameter of the strap is obtained by means of a device whose diameter decreases like that of a nozzle.

Abstract: A system of a tensioning wheel of multi-part construction for a tracked vehicle and a mounting for the wheel includes (a) a support body on the lateral vehicle superstructure, (b) an idler-wheel carrier which partially surrounds the support body and is displaceable in the longitudinal direction of the vehicle, and (c) an idler wheel which is rotatable around the idler-wheel carrier. Furthermore, a connecting member is guided from the idler-wheel carrier through the wall of the support body, which is made partially hollow as a cavity in the transverse direction of the vehicle, to an adjusting element disposed in the cavity.

Abstract: A bucket wheel body includes a supporting body having a frustoconical region, a radially outer circumferential region, and a radially inner circumferential region. The frustoconical region forms a carrier body; the radially outer region forms a rounded annular carrier for supporting buckets and the radially inner region forms a rounded hub support. The hub support, the annular carrier and the carrier body form a one-piece construction and jointly define an S-shaped cross section. A disc-shaped hub body is attached to the hub support. The hub body has an outer circumferential edge and a central opening. The outer circumferential edge of the hub body is in engagement with the carrier body, and a terminal edge face of the hub support is in engagement with the hub body along a zone radially inwardly of the outer circumferential edge of the hub body.

Abstract: In a device for crushing materials, in particular soft stone, a plurality of grates with breaking elements are arranged below a bunker containing the feedstock. At least one of said grates is translationally mobile in the horizontal direction with respect to the other, which facilitates crushing of the feedstock between the vibrating breaker elements and the stationary breaking elements.

Abstract: A conveyor having a roller belt closed in the circumferential direction having overlapping belt edges and an outer circumference and a plurality of belt support rollers guiding the roller belt along a conveying path, each support roller having a running face in contact with the outer circumference of the belt, each support roller defining an overlap with the next following support roller in the circumferential direction so that an imaginary axial extension of its running face intersects the running face of the next following support roller. Each overlap being oriented in the same direction so that in the event the belt rotates in the direction of the circumference, the outer edge of the belt in the overlap region contacts the running face instead of touching the edge of the following support roller.

Abstract: In a hydraulically operated multiport valve having a floating position for connecting the cylinder chambers of a hydraulic piston-cylinder drive, a valve slide and a restraining piston associated with it are provided. By means of a respective dimensioning of the surface of both the part of the valve slide which can be charged with control pressure for attaining the floating position and of the restraining piston, a displacement of the restraining piston against the maximum pressure present in its control chamber becomes possible.

Abstract: An arrangement for connecting and moving the plates of a caterpillar track of earth-moving machines in which adjacent chain plates bridge over on a common axis by, in each case, two inner or outer straps having bore holes. A solid chain pin which is moveable in circumferential direction and having a free central region for the action of sprocket-wheel teeth is mounted in the holes.

Abstract: A work cabin having a front windowpane, which is to be introducible and fixable in the interior roof space of the cabin, and having roller bearings, which are laterally articulated in the vicinity of corner regions of the front windowpane and are guided in two U-shaped guide rails. Respective spring cable pulleys are disposed in extensions of upper portions of the guide rails remote from the closed position of the front windowpane. Cable ends of the pulleys are guided over guide rollers and are attached to lower poritons of the front windowpane. A shaft spans the upper corner regions of the front windowpane between the roller bearings at those locations, with a hand lever being provided on the shaft for rotating the same.

Abstract: The present invention provides a crawler unit having a superstructure and a substructure and an excavating device for recovering bulk material. The excavating device has bearing regions and drive regions and also has vertically arranged shearing drums for cutting free the bearing and drive regions. The shearing drums have upper ends which are inclined obliquely forward.

Abstract: A method for the heat treatment of finely granular material, particularly for the manufacture of cement, employs a preferably multi-stage cyclone preheater (2), a rotary tubular kiln (1), a cooler (6) and a kiln off-gas line (5) which is formed between rotary tubular kiln (1) and cyclone preheater (2). The off-gas lines provides a passage substantially in upward direction for the off-gases of the rotary tubular kiln (1) and receives tertiary air fed thereto for the combustion of additional fuel. The tertiary air is provided in two streams from the cooler (6), which cooler is connected behind the rotary tubular (1) on the material side, the streams being introduced into the kiln off-gas line (5) at different heights. In order to separate the combustion of the additional fuel from the precalcination and to avoid the production of injurious nitrogen oxides (NO.sub.

Abstract: A conveyor boom which is mounted to the superstructure of a large-scale conveyor so as to be raised and lowered in a vertical plane, such as a belt boom for a stacker, a discharge belt boom for a bucket wheel excavator or the like in which sets of carrier rollers are mounted on both sides of the hinge point of the discharge belt carrier in a plurality of hinged together carrier roller frame members and, at their articulated connections, are provided with supporting rollers which are supported on the running faces of supporting carrier members mounted below the discharge belt.

Abstract: A method for the heat treatment of finely granular material, particularly for the production of cement, employs a multi-stage cyclone preheater, a rotary tubular kiln, a cooler, and a single kiln off-gas line which is formed between the rotary tubular kiln and the cyclone preheater and is flown through substantially in upward direction by the off-gasses of the rotary kiln and to which tertiary air is fed in two partial-streams for the combustion of additional fuel. The method employs steps of feeding fuel to a lower partial stream of tertiary air, directing material to be treated above a second partial stream of tertiary air, and applying precalcined material in countercurrent with the off-gas line below the tertiary air.