Abstract: The invention relates to an automatic concrete pump with an articulated mast (14) serving as a support for a supply line and with two forward and two backward support extensions (16?,16?,18?,18?) which can be supported on a base platform (32) and which can be lowered from a driving position into a support position, each with a telescopic support leg (30). According to the invention, each support extension comprises one inner support position near to the chassis, and at least one outer support position away from the chassis, which can be freely selected by forming defined support configurations (V,SL,SR,YL,YR,N) for the four support extensions.

Abstract: The invention relates to an automatic concrete pump with an articulated mast (14) serving as a support for a supply line and with two forward and two backward support extensions (16?, 16?, 18?, 18?) which can be supported on a base platform (32) and which can be lowered from a driving position into a support position, each with a telescopic support leg (30). According to the invention, each support extension comprises one inner support position near to the chassis, and at least one outer support position away from the chassis, which can be freely selected by forming defined support configurations (V, SL, SR, YL, YR, N) for the four support extensions.

Abstract: The invention relates to a device for cleaning a thick matter delivery pipe (10), comprising an end-hose (18) which is mounted on an outlet side, a device (24) for introducing a pressurised fluid into the thick matter delivery pipe (10), and a cleaning body (22) that can be driven through the delivery pipe (10) by the fluid, said cleaning body lying against the entire circumference of the inner surface of the thick matter delivery pipe (10). According to the invention, the device comprises a sensor (26) for determining the consistency of the material in a section of the thick matter delivery pipe (10), a control unit (28) to which a signal can be transmitted from the sensor (26) upon a change in the consistency of the material, and a closing device (30) that can be actuated by the control unit when the signal is received, the closing device being used to at least partially close the end-hose (18).