Abstract: The invention relates to a mobile work machine, especially a mobile concrete pump, comprising a chassis (10) and accessible platforms (22) which are positioned on carrier brackets (26) projecting laterally from the chassis. The aim of the invention is to produce and mount said platforms (22) in a simple manner. To this end, the platforms consist of hollow profiled rails (30, 30′, 32) having a downward-facing profile wall (34) which rests against the carrier brackets (26), the rails being detachably connected to the brackets.

Abstract: A mobile concrete pump including a chassis (10), a rotating gear (14) for a distributing boom which is mounted onto said chassis, a pump assembly and a supporting construction (20). The supporting construction comprises two arc-shaped telescopic guides (32) for arc-shaped support arms (22) that can be retracted into the chassis and extended obliquely outwards in front. The telescopic guides (32) cross each other on different horizontal planes. Their geometric centers of curvature (36) are mirror-symmetrical in relation to the longitudinal axis (38) of the chassis and lie at a lateral distance from the edges of the longitudinal sides outside said chassis (10), behind an imaginary connecting line drawn between the rear ends (42) of the telescopic guides (32). The inventive supporting construction (20) permits large construction stances to be achieved with simple means, said stances also being suitable for distributing booms in the 50 m class.

Abstract: The invention relates to a silo for sludge, especially sewage sludge, comprising a sludge-receiving part (12), a feeding part (16), said feeding part being located above the sludge-receiving part (12) and communicating with said sludge-receiving part (12) via a inlet (14), and a sludge-discharge device. Said sludge-discharge device is located in the lower area of the sludge-receiving part, and can preferably be connected to a pipeline system. According to the invention, a separator device (18) for removing foreign bodies is located in the area of the feeding part (16) so that the sludge which is temporarily stored in the silo can easily be used later on. Said separating device for removing foreign bodies (18) has a sieve grate (20) covering the inlet (14) and at least one counter-surface (22) positioned above said sieve-grate (20). Said sieve-grate and said counter-surface are able to move in relation to each other as sludge pushes through the sieve openings of said sieve-grate.

Abstract: A material feed container (20), especially for thick material pumps, comprising a lower container component (38) that is upwardly open and a motor-driven agitator (44) that extends through the lower container component (38) in-between two side walls (50). In order to make the inside of the container easily accessible for cleaning and maintenance purposes, the agitator (44) is provided with a pivot bearing (56) and a drive motor (48) which together form a structural unit which is detachably connected to the lower container component (38). The container is also provided with a top piece (40) that is open towards the top and bottom, can be detachably arranged on the top edge of the lower container component (38) and can be connected to the lower container component (38) and/or agitator unit if so desired.

Abstract: A mobile concrete pump comprising a supporting frame (16) mounted on a chassis (10) and a pump unit (30) disposed on the supporting frame (16) and having a rear material feeder container (32). Conveyor pipes or tubes (38, 40) can be connected to the pump unit (30), and can be transported in magazines (42, 44) along with the automatic concrete pump. The magazines can be easily accessed when they are moved from a transport position substantially parallel to the loading area (48, 50) into a removal or unloading position, with back end tilting downwards, by rotating said magazines around an axis of rotation (52, 54) parallel to the vertical axis of the chassis and tilting around a tilting axis (56, 58) which runs crosswise in relation to their longitudinal axis and perpendicular to the vertical axis of the chassis. Rotation and tilting of the magazines (42, 33) can be done manually or using hydraulic means.

Abstract: The present invention relates to a pipe switch for a dual-cylinder thick-liquid pump, wherein said system comprises a pivoting pivot pipe (36) located in the front of a glasses-like wear plate (34) on the cylinder side as well as a wear ring (38) which is capable of limited axial displacement at the end of the pivot pipe (36) on the cylinder side. The ring can be pressed against the wear plate (34) by the hydrostatic pressure existing inside said pivot pipe. The wear ring 38 has a centering portion (46) guided on an axis-parallel centering surface (42) of the pivot pipe (36) as well as a sealing part (54) resting against the wear plate (34) through an abutment surface (52) on the cylinder side. The pivot pipe (36) and the sealing part (54) of the wear ring (38) have annular surfaces (56, 58) which face each other and which are axially spaced from one another by an annular gap (59) opened towards the inside of the pipe.

Abstract: A mobile work machine, especially an automatic concrete pump. The mobile work machine is arranged on a chassis (10) which has at least one preferably horizontally arranged telescopic segment (18) configured as a sliding housing, as well as a supporting strut (20) displaceable in said telescopic segment between a stowed transporting position and at least one extended position, the supporting strut supportable on the ground (28) via a foot element (26). In order to enable easy adjustment of the supporting strut width, it is proposed in accordance with the invention that the telescopic segment (18) consists of an inner segment part (44) fixed to the chassis and an outer segment part (48) which can be limitedly pivoted around an axis (46) parallel to the vertical axis of the chassis.

Abstract: The mobile working machine has a chassis (10) comprising at least four wheels (30) arranged in pair-wise associated with wheel axles (32) and connected to a frame (36) by interposed wheel springs (34) pre-tensionable by the effect of a load exerted on the frame. Two support legs (22) are also provided laterally one opposite the other on the sides of the frame, associated with one of the wheel axles (32), preferably the back axle, which have a foot-part (26) which can be extended downward and supported on the ground thereby lifting the chassis. At least one blocking mechanism is also provided to selectively release or block the spring path of one of the wheel springs (34). In order to ensure reliable and safe manipulation during blocking of the axle, the blocking mechanism (38) automatically moves in the blocking direction when the foot-part (26) is pulled out and automatically moves in the release direction when the foot-part (26) is retracted.

Abstract: A mobile machine, especially a self-propelling concrete pump, comprising a chassis (10) and at least one support strut (20) displaceable in a preferably horizontally oriented tubular or box-shaped telescopic section (18) between a retracted transport position to at least one extended support position, and supportable on the ground via a foot part (26) provided at its free end. In order to alter the support width across the support strut, in accordance with the invention, the support strut (30) has at least two strut parts (40, 42) which can pivot around an articulated axis (46), the axis being parallel to the vertical axis of the vehicle chassis (10).

Abstract: The invention relates to a device and a method to determine the delivery rate or mass flow rate of material conveyed by a high density liquid piston pump (10) through a delivery line (24). The exact determination of the above mentioned variables is achieved by mounting the delivery cylinder (1) in a housing (30) with radial and axial slack and suspending it on at least one weighing cell (36) forming one piece with the housing.

Abstract: The invention relates to a sliding device for two-cylinder pumps for liquids, especially designed for concrete pumps. The sliding device (20) has a pivot pipe (16) which is bent and has substantially a C-shape. The pivot pipe is fixedly connected, at its upper end, to an extension pipe (42) protruding over a back wall (24) of a material feeding bin and connected, at its end opposite the pivot pipe, to a discharge conduit through a pipe rotating connection. The pivot pipe is placed in such a way that it is able to pivot about the axis of the extension pipe so that its other end is connected alternatively to the openings of the discharge cylinder (10). In order to ensure reliable operation in spite of frictional wear in the extension pipe (42), the invention provides for a support pipe (84) which coaxially overlaps the extension pipe (42), is fixedly connected to the upper end of the pivot pipe and extends over least on one part of the extension pipe (42).

Abstract: The invention relates to a travelling thick matter pump with a driving mechanism presenting an automobile engine (40) and a gear boxy (42), wherein the driven shaft (46) of the gear boxy can be connected via an interposable transfer gear (48) to a hydraulic pump (54) in order to drive the which matter pump (24) and a speed limitation device for the setting of a maximum engine speed during operation of the pump. I order to selectively ensure optimum pump operation, according to the invention the transfer gear (48) presents at least two step-up ratios after whose activation differing maximum engine speeds can be set via the speed limitation device (70).

Abstract: Thick matter and solids are conveyed together and substantially continuously through a conveyor pipeline. The thick matter is forced by a conveyor piston driven by a piston pump from a feed container into a conveyer cylinder. A forward face of the piston has a cutting crown with a cutting edge cooperating with an annular cutting ring to cut off solids projecting beyond an inlet in the conveyer pipeline.

Abstract: The invention relates to a piston pump for thick matter such as concrete, sewage sludge, excavated tunnel material and similar. The inventive piston pump has at least one hydraulically operated pump cylinder (10, 12). The pump piston (30) of said pump cylinder (10, 12) is connected to the piston (38) of a hydraulic drive cylinder (26, 28) by a common piston rod (34). A water box (42) is situated between the pump cylinders (10, 12) and the drive cylinders (26, 28), the piston rod (34) passing through said water box (42) for cleaning purposes. Said water box (42) has an assembly opening (44) at the top end, said opening being accessible from above, and a closeable water outlet nozzle (66) located at the bottom end. The water box also has an assembly opening located at the bottom end for easier assembly. Said bottom-end assembly opening (54) can be closed in such a way that it is liquid-tight by means of a removable base plate (52).

Abstract: The invention relates to a pressure feed line for concrete, particularly for use in concrete distributor masts of mobile and stationary concrete pumps. Pressure feed lines of this type generally contain an end hose (12) arranged on the mast tip (10) of the distributor mast, which points down with its outlet aperture (16), via which the transported concrete is discharged on the construction site. In order to avoid undesirable demixing in the end hose, even if the concrete is being pumped slowly, is stiff or low in sand, it is proposed, according to the invention, that an expansion throttle (18) which can be spread open under the effect of the exiting concrete is arranged in the region of the outlet aperture (16) of the end hose (12).

Abstract: Thick matter and solids are conveyed together and substantially continuously through a conveyor pipeline. The thick matter is forced by a conveyor piston driven by a piston pump from a feed container into a conveyer cylinder. A forward face of the piston has a cutting crown with a cutting edge cooperating with an annular cutting ring to cut off solids projecting beyond an inlet in the conveyer pipeline.

Abstract: A thick matter pump, especially a concrete pump, including a material feed container, two conveyor cylinders opening at the front into the inside of the material feed container, a swivelling pipe, one end of which alternately in pulses communicates with the frontal apertures in the conveying cylinder and the other end being connected to a conveyor pipe and with a closable cleaning aperture in the appropriate pipe wall arranged near the end of the conveyor pipe or in a section of the swivelling pipe outside the material feed container. A cleaning cartridge can be connected to the cleaning aperture having a compressed air and/or pressurized water connection while the feed pipe and/or the swivelling pipe can be closed on the conveyor cylinder side by means of a blocking system.

Abstract: A large manipulator, especially for self-propelled concrete pumps includes a rotary head that rotates about a vertical axis on a mast stand, and a jointed or articulated mast composed of at least three mast arms. The mast arms of the jointed mast can be swivelled to a limited extent about horizontal, mutually parallel axes relative to the adjoining rotary head or mast arm using a corresponding drive unit in each case. The jointed mast is operated by a remote control device which has a signal transmitter situated at the mast top and a control unit. The signal transmitter drives a computerized coordinate field device actuating the drive units according to a displacement path relative to the momentary position of the mast top as directly indicated by means of the control unit.

Abstract: The invention relates to a device for handling a brush head for cleaning the surfaces of large objects like aircraft, ships or buildings. The handling device has a multi-joint assembly carrying a brush head (18) on the end extension (14) of an angled mast (13) having, extending from the end extension (14), three motor-driven rotary units (60, 62, 64) arranged one behind the other and having alternately perpendicular axes (60', 62', 64') and a motor-driven telescopic linear unit (66') secured to the last rotary unit (64) and aligned with its axis of rotation (64'). In order to ensure that the brush roller is always perpendicular to the surface to be cleaned along its entire travel, even at points which are difficult of access, the invention proposes that axes (60', 66') of the rotary unit (60) on the end extension side and of the linear unit (66) be arranged in laterally staggered, mutually parallel planes.