Abstract: An apparatus for suction and discharge of material comprises a container (9) with a suction opening (19) for letting in a sucked-up air/material mixture and a discharge opening (14) for discharging material. The container (9) is rotatable and has inner conveying means (18) which upon rotation of the container (9) are adapted to convey the material to the discharge opening (14).

Abstract: When collecting a crude oil material or a similar highly viscous and sticky material, a lubricating fluid is supplied and vacuum is applied.

Abstract: A sweeping machine composed of a brush assembly (1) and a suction assembly (5, 7, 9) sucking dirt that has been brushed off a ground surface. The brush assembly (1) has two elongate, cylindrical brushes (1) which are symmetrically arranged on either side of the travelling direction (K) and have radial bristles and a horizontal drive shaft (3) for rotation of the brushes. The drive shafts (3) extend transversely of the travelling direction and make a positive acute angle with the transverse direction, and the ends of the brushes (1) facing each other are arranged at a distance from each other. The brush assembly (1) is enclosed in a downwardly open housing (2) whose lower edge is formed of an elastic skirt (15) arranged to drag its free edge along the ground surface. The suction assembly has a suction nozzle (5) which is connectible to a suction device (7) supported by a vehicle (8). The suction nozzle (5) is elongate and extends transversely of the travelling direction (K) and behind the brushes (1).