Abstract: The invention relates to a shell coupling (40) for coupling pairs of pipes, having two half-shells (46, 48?) which, in the coupling state, bound a circular opening (60) for through-passage of the pipes and, at their one end, can be pivoted in relation to one another, via an outer articulation (44), about an articulation axis-parallel to the circular opening (60) and, at their other end, can be connected to one another in a releasable manner via a clamping mechanism (51), with the pipes which are to be coupled being clamped in the process.

Abstract: A mobile concrete pump includes a supporting structure that can be placed directly or indirectly via an assembly frame on the running gear of an HGV chassis, for receiving functional units that form a support device and a placing boom. The placing boom is rotatably mounted on a boom pedestal that is integrated into the supporting structure, while the support device includes two telescopic tubes which are integrated into the supporting structure, cross over one another at different heights and have diagonal passages that are open at the front. A respective open space in the supporting structure lies below the upper and above the lower telescopic tube, each open space being separated from the neighboring telescopic tube by an intermediate base. A pre-fabricated liquid tank is inserted into at least one of the open spaces, the outer contour of the tank being geometrically adapted to the supporting structure and the tank supplementing and reinforcing the supporting structure.

Abstract: A method produces a mast arm with a mast arm body and with at least one pipe holder for a concrete-distributing mast for use on stationary and mobile concrete pumps with a plurality of mast arms which are connected to one another so as to be pivotable on articulated joints about an axis of articulation and which hold a concrete-conveying line which has at least one rotary joint which has an axis of rotation aligned with an axis of articulation of an articulated joint. The at least one pipe holder here has a pipe support section which serves for receiving the concrete-conveying line at a holding point which has a location predetermined by the position of the axis of articulation. The mast arm body is premanufactured with a receiving intersection and the at least one pipe holder is premanufactured with a fastening section which has a connecting intersection.

Abstract: A locking device for supporting members for a mobile machine, which supporting members are arranged on a chassis or load-bearing frame and can be extended, pivoted or telescoped from a retracted transport position into a deployed working position, has a locking bolt which can be displaced between a locked position and an unlocked position in a guide sleeve which is fixed to the frame and is arranged transversely with respect to the pulling-out direction of the supporting member, which locking bolt is prestressed in the direction of the locked position under the action of a spring, has an actuating member which displaces the locking bolt between the locked position and the unlocked position, and has a latching and guiding member for the locking bolt, which latching and guiding member is arranged rigidly on the supporting member, wherein the latching and guiding member has a guiding curve which pushes the locking bolt into a release slope, and wherein the locking bolt can be moved in the release slope automatic

Abstract: A working device has a base designed as a stationary support column, a motor-driven rotary head and a stack of arms made up of several mast arms which can be moved with respect to each other in pairs, using articulated or sliding joints, supporting a concrete transport line. The stack of arms is articulated on the rotary head about a horizontal rotational axis by a first mast arm. The working device also includes a control mechanism which can be actuated by a control element or a radio path and which is arranged in a control box, and a hydraulic assembly including an oil tank and a motor-driven hydraulic pump for controlling working groups for moving the rotary head and mast arm. A working platform fixed with respect to the base is arranged in the region of the bearing block for emergency operations.

Abstract: A working device has a base designed as a stationary support column, a motor-driven rotary head and a stack of arms made up of several mast arms which can be moved with respect to each other in pairs, using articulated or sliding joints, supporting a concrete transport line. The stack of arms is articulated on the rotary head about a horizontal rotational axis by a first mast arm. The working device also includes a control mechanism which can be actuated by a control element or a radio path and which is arranged in a control box, and a hydraulic assembly including an oil tank and a motor-driven hydraulic pump for controlling working groups for moving the rotary head and mast arm. A working platform fixed with respect to the frame is arranged in the region of the bearing block for emergency operations.

Abstract: A working device has a substructure for receiving a supporting device for ground support and an elongated working boom. The one end of the working boom is mounted on a rotary head bearing block, which projects beyond the substructure, in a pivotal manner about a horizontal axis. Furthermore, the rotary head is mounted on a rotary bearing of the substructure in a rotatable manner about a vertical axis by a radially projecting bearing ring. The bearing block and the bearing ring of the rotary head are rigidly connected to each ,other via a base plate provided with a central opening. The rotary head has an annular reinforcing structure which points away from the mounting plate in the direction of the substructure and is concentric about the bearing ring, the reinforcing structure compensating for the non-roundness of the support structure of the bearing block in the circumferential direction of the bearing ring.

Abstract: A working device has a base designed as a stationary support column, a motor-driven rotary head and a stack of arms made up of several mast arms which can be moved with respect to each other in pairs, using articulated or sliding joints, supporting a concrete transport line. The stack of arms is articulated on the rotary head about a horizontal rotational axis by a first mast arm. The working device also includes a control mechanism which can be actuated by a control element or a radio path and which is arranged in a control box, and a hydraulic assembly including an oil tank and a motor-driven hydraulic pump for controlling working groups for moving the rotary head and mast arm. A working platform fixed with respect to the frame is arranged in the region of the bearing block for emergency operations.

Abstract: A working device has a base designed as a stationary support column, a motor-driven rotary head and a stack of arms made up of several mast arms which can be moved with respect to each other in pairs, using articulated or sliding joints, supporting a concrete transport line. The stack of arms is articulated on the rotary head about a horizontal rotational axis by a first mast arm. The working device also includes a control mechanism which can be actuated by a control element or a radio path and which is arranged in a control box, and a hydraulic assembly including an oil tank and a motor-driven hydraulic pump for controlling working groups for moving the rotary head and mast arm. A working platform fixed with respect to the base is arranged in the region of the bearing block for emergency operations.

Abstract: A work device has a stationary or movable frame which has a substructure fixed to the frame, a rotating head rotatable about a vertical rotational axis on a bearing block of the substructure by a drive mechanism, and an extension arm mounted on a bearing point of the rotating head in a pivotal manner about a horizontal pivot axis. A hydraulic cylinder piston unit has ends fixed to the cylinder and to the piston rod and hinged to hinge points on the extension-arm side and on the rotating-head side with a horizontal hinge axis. The rotating head has a base section arranged on the bearing block and an adapter piece including the bearing point for the extension arm and the hinge point on the rotating-head side for the cylinder piston unit. The base section and the adapter piece can be removably coupled to each other via a separating point.

Abstract: The invention relates to a mobile concrete pump comprising a supporting structure (46) that is placed directly or indirectly by means of an assembly frame (22) on the running gear (12) of an HGV chassis (10), the supporting structure incorporating functional units that form a support device and a placing boom (36). The placing boom (36) is rotatably mounted on a boom pedestal (44). The boom pedestal (44) comprises a vessel (52) that is inserted in the supporting structure (46) and acts as a rotary bearing for the placing boom (36), while the support device has two support leg casings (54, 56) which are integrated into the supporting structure (46), cross over one another, have diagonal passages that are open at the front and have a telescopic support leg (40) in each support leg casing.

Abstract: A container for accommodating high-viscosity materials, such as liquid concrete. The container has at least one bearing sleeve, which extends through a wall opening and is fastened in the container wall in a liquid-tight manner. A shaft extends through the bearing sleeve in such a way that an annular gap is left open. A shaft seal, which bridges the annular gap and is made of elastomeric material, is located at the container-interior end of the bearing sleeve. A lubricant is applied to the annular gap from the container exterior. The invention is characterised in that the shaft seal has, on the side thereof radially facing the shaft, a conveying thread that supports the conveying of the lubricant in the direction of the container interior, which conveying thread advantageously communicates with the container interior via a check valve open to the container interior.

Abstract: A rotary distributor for thick matter, in particular for fresh concrete, has a load-bearing framework, which can be set down on a set-down surface, has a first extension-arm tube, which is arranged on the load-bearing framework such that it can be rotated about a framework-mounted vertical axis in the region of its inlet end, and has a second extension-arm tube, which is arranged such that it can be pivoted about a horizontal pivot axis in the region of the outlet end of the first extension-arm tube and communicates with the first extension-arm tube. The first extension-arm tube, in the region of its inlet end, can be pivoted, in addition, about a horizontal axis in relation to the load-bearing framework, and the second extension-arm tube can be rotated, in addition, about an axis of rotation, which is perpendicular to the horizontal pivot axis, in relation to the outlet end of the first extension-arm tube.

Abstract: A device for the drive control of a two-cylinder thick matter pump has a diverter which is arranged in a material charging container and a motor-driven hydraulic variable displacement pump, via which both the drive cylinders of the thick matter pump and the drive mechanism of the diverter are controlled. An adjusting throttle is arranged in a pressure line between the high-pressure outlet of the variable displacement pump and the drive cylinders of the thick matter pump. A control line which leads to an adjusting mechanism of the variable displacement pump is coupled back from the pressure line downstream of the adjusting throttle. A connecting line which leads to a supply connector of the diverter hydraulics and in which a fixedly adjusted throttle can be arranged is branched off from the pressure line upstream of the adjusting throttle.

Abstract: A concrete distributor mast has a plurality of mast arms, which can be moved relative to each other. The mast arms are connected to each other in a hinged manner at coupling points and have in the region of the coupling points hinge points, at which drive and coupling members of a coupling gear mechanism that actuates the mast arm movement are coupled in a hinged manner. Situated at the hinge points of the mast arms are hinge components, which span the respective mast arm transversely and define a bearing axis. At least one of the hinge components has a hinge pin, which is connected in a rotationally fixed manner to the mast arm, projects outwards beyond the mast arm to both sides at the free ends thereof, and is connected in a rotationally fixed manner to the mast arm. On the ends of the hinge pin that project beyond the mast arm, bearing shells are arranged for the rotary bearing of an adjacent drive or coupling member of the coupling gear mechanism.

Abstract: The invention relates to a mobile work machine having a chassis (10) and with two front and two rear support brackets (20, 22). The support brackets can be displaced from a driving position close to the chassis into a support position by changing the base angles (?) thereof and/or can be telescoped by changing the lengths thereof between the end on the mounting side and that on the free end. In order to be able to automatically determine the support leg positions (Xc/Yc) in relation to the chassis (10), three transceiver units (S1/E1, S2/E2, S3/E3) related to the support legs are provided for transmitting and receiving run time or distance signals. Furthermore, a microprocessor-supported evaluation unit responding to the transmitted and received signals of the transceiver units arranged in pairs is provided, comprising a software routine for determining the support leg positions in a coordinate system (x/y) fixed to the chassis.

Abstract: A mobile concrete pump includes a supporting structure that can be placed directly or indirectly via an assembly frame on the running gear of an HGV chassis, for receiving functional units that form a support device and a placing boom. The placing boom is rotatably mounted on a boom pedestal that is integrated into the supporting structure, while the support device includes two telescopic tubes which are integrated into the supporting structure, cross over one another at different heights and have diagonal passages that are open at the front. A respective open space in the supporting structure lies below the upper and above the lower telescopic tube, each open space being separated from the neighboring telescopic tube by an intermediate base. A pre-fabricated liquid tank is inserted into at least one of the open spaces, the outer contour of the tank being geometrically adapted to the supporting structure and the tank supplementing and reinforcing the supporting structure.

Abstract: The invention relates to a distributing boom (14) for stationary or mobile concrete pumps. The distributing boom (14) consists substantially of a rotary head (22), which can be rotated about an axis of rotation (18) in the form of a vertical axis, and of an arm assembly (24), which is made up of a plurality of boom arms which can be telescoped or pivoted relative to one another. The arm assembly (24) has the one end of its first boom arm (1) articulated on the rotary head (22) and, by means of a first cylinder/piston unit (32), which has its ends articulated at points of articulation (28, 30) of the rotary head (22) and of the first boom arm (1), can be pivoted, about a horizontal axis of inflection (A), between a substantially horizontally oriented retracted position and an operating position. It is an aim of the invention to provide measures which make it possible for the cylinder/piston unit (32), which acts on the first boom arm (1), to be reduced in size.

Abstract: A locking device for supporting members for a mobile machine, which supporting members are arranged on a chassis or load-bearing frame and can be extended, pivoted or telescoped from a retracted transport position into a deployed working position, has a locking bolt which can be displaced between a locked position and an unlocked position in a guide sleeve which is fixed to the frame and is arranged transversely with respect to the pulling-out direction of the supporting member, which locking bolt is prestressed in the direction of the locked position under the action of a spring, has an actuating member which displaces the locking bolt between the locked position and the unlocked position, and has a latching and guiding member for the locking bolt, which latching and guiding member is arranged rigidly on the supporting member, wherein the latching and guiding member has a guiding curve which pushes the locking bolt into a release slope, and wherein the locking bolt can be moved in the release slope automatic

Abstract: A method produces a mast arm with a mast arm body and with at least one pipe holder for a concrete-distributing mast for use on stationary and mobile concrete pumps with a plurality of mast arms which are connected to one another so as to be pivotable on articulated joints about an axis of articulation and which hold a concrete-conveying line which has at least one rotary joint which has an axis of rotation aligned with an axis of articulation of an articulated joint. The at least one pipe holder here has a pipe support section which serves for receiving the concrete-conveying line at a holding point which has a location predetermined by the position of the axis of articulation. The mast arm body is premanufactured with a receiving intersection and the at least one pipe holder is premanufactured with a fastening section which has a connecting intersection.