Abstract: The invention relates to a transport tube for thick materials, in particular for concrete. The transport tube comprises substantially a pressure tube (16) from wear-resistant tube material, which is preferably hardened on the inside, and at least one coupling ring (18?, 18?) which is fixed with a material-to-material fit at the end to the outer face of the pressure tube (16). According to the invention, the coupling ring (18?, 18?) has a first ring part (34) having an inner face of excess dimensions with respect to the outer face of the pressure tube (16), and a second ring part (36) which adjoins the first ring part (34) axially and has an inner cone which deviates in its axial profile from the outer face of the pressure tube (16) as far as an undersize. The coupling ring (18?, 18?) is pressed onto the outer face of the pressure tube (16) with the inner cone (38) of its second ring part (36).

Abstract: A movable concrete pump comprising a structural frame (14) that is mounted on a truck undercarriage (10) of a truck chassis (12), a boom stand (22) which is disposed on the structural frame (14) and can be rotated about a vertical axis (20), and a concrete distribution boom (24) embodied as a multi-member articulated boom. In order to be able to use a distribution boom having a great range, a trailer (34) is provided that has its own undercarriage (34) and is connected to the truck undercarriage (10) via a coupling member (36). The trailer (32) comprises a prop (40) which is rotatable about a vertical axis (38) and accommodates the set of arms that protrude from the rear end of the truck undercarriage (10) while driving on the road. The set of arms forms the coupling member (36) and encompasses a first boom arm (1) and additional boom arms (2 to 4) that are in a folded position relative to the first boom arm.

Abstract: A movable concrete pump comprising a structural frame (14) that is mounted on a truck undercarriage (10) of a truck chassis (12), a boom stand (22) which is disposed on the structural frame (14) and can be rotated about a vertical axis (20), and a concrete distribution boom (24) embodied as a multi-member articulated boom. In order to be able to use a distribution boom having a great range, a trailer (34) is provided that has its own undercarriage (34) and is connected to the truck undercarriage (10) via a coupling member (36). The trailer (32) comprises a prop (40) which is rotatable about a vertical axis (38) and accommodates the set of arms that protrude from the rear end of the truck undercarriage (10) while driving on the road. The set of arms forms the coupling member (36) and encompasses a first boom arm (1) and additional boom arms (2 to 4) that are in a folded position relative to the first boom arm.

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: 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 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 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 concerns a slide valve for a two-cylinder pump, in particular a truck-mounted concrete pump. The slide valve has an essentially C-shaped swing pipe which is connected at the upper end by a rotating joint to a discharge line and is mounted so that it can be rotated by a switchover mechanism about an axis which is essentially parallel to the axes of the pump cylinders in such a way that its lower end, which is fitted with a wearing ring, is connected alternately to the apertures at the ends of the pump cylinders connected to the rear wall of a feed tank. In order to enable the swing pipe to swing through a large distance, the swing drive cylinders, which are preferably designed as piston/cylinder units, are mounted in ball sockets located at the cylinder bearings and their axes of operation include between then an obtuse angle facing the rear wall.

Abstract: The invention relates to an arrangement for cleaning the surfaces of aircraft with a large manipulator having a rotating brush head consisting of several extensions (12, 12', 12", 14) pivotable on articulations (20, 22, 24, 28) by means of hydraulic drive systems (30) and fitted on a rotary bracket (11) of a motor-driven chassis (10) with its base extension (12) fitted on an angled mast to rotate about a main axis (11) and a multiple articulation (16) on the end extension (14) at the free end. To provide starting auxiliary for the chassis (10), the adaptation of the large manipulator to the aircraft and/or monitoring facilities for the cleaning process, there is an opto-electronic distance camera (40) and a computer-supported electronic evaluation system to which the output signals of the distance camera (40) are applied.

Abstract: The invention relates to a large manipulator, especially for truck mounted concrete pumps. A chassis bears a mast base rotatable about a vertical pivot and an articulated mast consisting of at least three arms. The arms can be pivoted to a limited extent about horizontal, mutually parallel axes in pairs in relation to the adjacent base or arm by means of a drive system. The articulated mast is actuated via a remote control device with control levers.

Abstract: The invention relates to a conveyor for thick substances containing a great deal of solids and having a conveyor pipe (20) which can be filled with the thick substances under pressure and at least one injection point (22, 24) opening into the conveyor pipe (20) to supply a lubricant (83) to the region (84) between the pipe wall and the surface of a plug flow of thick substance (82) being formed in the conveyor pipe (20). In order to center the plug flow (82) inside the conveyor pipe (20) and provide a stable layer of lubricant (83), the invention proposes that the conveyor pipe (20) have at least one annular waist at a distance from and downstream of the injection point (22, 24) formed by a collar or shoulder-like projection (62') inside the conveyor pipe (20).

Abstract: A process and device are disclosed for determining by a measurement technique the flow rate of a substance conveyed by means of a thick matter piston pump (1) through a delivery pipe (22). The thought at the basis of the invention is that the filling level of the delivery cylinder, which is required for accurately determining volumetric flow, may be inferred from the variations of the pressure in the delivery pipe. Feeding pressure in the delivery pipe (22) is thus continuously or periodically measured at predetermined time intervals by means of a pressure sensor (54). The interval between successive pressure strokes, used to determined the number of frequency of strokes, as well as the filling level of the delivery cylinder, used to determine the actual delivery volume per pressure stroke, are both derived from the time-dependent amplitude characteristic of the measured delivery pressure.

Abstract: The invention concerns a five-arm concrete-distribution rig (20) mounted on a vehicle. Arms (1, 2 and 3) can be folded together by pivoting in opposite directions about hinged joints (B and C), which are capable of pivoting through approximately 180.degree., to form a "Z". In order to make it possible to supply concrete through several hoses in parallel, to upper stories and over obstacles, the invention proposes that arms (3, 4 and 5) can be folded together by pivoting in the same direction about joints (D and E), which are capable of pivoting through approximately 270.degree., to bring them up against arms (2 and 3) in the vicinity of hinged joint (C).

Abstract: The invention relates to a concreting device with a rotary column (16) pivotable on a chassis (10) about a vertical axis (14), a distribution mast (18) pivotable about a horizontal axis (20) on the rotary column (16) and having at least two extended pole arms (24, 24', 24", 24'") which are movable relatively to one another, a distributor arm (26) articulated on the free end of the distribution mast (18) and a conveyor line (32, 32') for the concrete extending along the distribution mast (18) from the rotary column (16) to the distributor arm (26). In order to be able to use the concreting device even on low tunnel work sites, the distribution mast (18) consists of at least two longitudinally telescopic pole arms (24, 24', 24'", while the distributor arm (26) is fitted on the distribution mast (18) to rotate about a transverse axis (30) perpendicular to the telescopic axis and about a longitudinal axis (28) perpendicular thereto.

Abstract: A tube switch for a double-cylinder sludge pump is provided including a swing pipe, a wearing ring and an elastic member. The swing pipe is adapted to swivel in front of a center plate and includes an extension portion having an inner surface. The wearing ring is supported between the end of the swing pipe and the center plate and is axially movable relative to the swing pipe. The wearing ring has a recess formed at one end thereof, defined by a sloped boundary surface. The swing pipe is adapted to receive the end of the wearing ring including the recess therein. The recess thus defines an annular space between the swing pipe and the wearing ring with the inner surface of the extension portion of the swing pipe facing the annular space. The elastic member includes a radial inner surface and a sloped front end surface that corresponds to the boundary surface of the wearing ring. The elastic member is supported between the swing pipe and the wearing ring within the annular space.

Abstract: A method is provided for distributing sludge-type matter from a supply line into several distributor conduits. The flow of matter from the supply line is directed through a manifold conduit rotatably coupled about an axis of rotation on one end to the supply line and coupled on the other end to a rotating plate, the rotating plate being rotatable about the axis of rotation relative to a distributor plate, the distributor plate including one end of each of the distributor conduits coupled thereto and, thus, adapted to be coupled in fluid communication with the manifold conduit. The rotating plate is rotated relative to the distributor plate to align the manifold conduit with a respective distributor conduit and, in turn, to direct the flow of matter therethrough.

Abstract: An apparatus for delivering sludge-type matter from a supply line has a manifold conduit rotatably coupled on one end to the supply line and adapted to receive matter flowing therefrom. A distributor plate includes a plurality of ports extending therethrough. A plurality of distributor conduits are each coupled on one end to a respective port on one side of the distributor plate to receive matter therefrom. A rotating plate is rotatably supported on the other side of the distributor plate and coupled to the other end of the manifold conduit. The rotating plate is adapted to rotate relative to the distributor plate to align the manifold conduit with a respective distributor conduit to direct the flow of matter therethrough. The rotating plate has a plurality of stop cams formed on the peripheral edge thereof, each corresponding in position to a respective distributor conduit.

Abstract: A pipe switch for two-cylinder thick-material sludge pumps comprises a pivot pipe (1) pivotable in front of a wear plate (8). A wear ring (22) is disposed axially slidable to a limited amount against the spring force of a rubber-elastic sealing ring (3) on the cylinder-side end of the pivot pipe (1). At least one stabilization ring (26', 26"), made of steel, is connected and attached to the sealing ring (3). Said stabilization ring (26', 26") is disposed in the region of one of the two front faces of the sealing ring (3). This measure achieves a permanently sealing and wear-balancing effect even in case the sealing rings exhibit an elongated extended cross-sectional form in the axial direction.

Abstract: In order to avoid the time-consuming transport by road or rail vehicles, in many cases, overburden is pumped to the outside of a tunnel under construction, where it is dumped onto dump-hills. In order to avoid such dump-hills as well as extended transport distances, according to the invention it is disclosed that the overburden is transported, dumped or stored, via channels drilled into the wall of the tunnel, inside of the mountain surrounding the tunnel, and also to transport the overburden, in case of a tunnel to be constructed under a waterway, by means of a pipe into the waterway or to the surface of the waterway.