Abstract: A device for separating heavier inpurities from solid bodies in a fluid flow comprising a trough-like casing accommodating a horizontal rotatable drum with a screen cylindrical side wall and groove-like elements move the impurities in the rotating drum towards an appliance intended to separate, receive and unload the impurities. The appliance is secured to the drum at the inlet for the fluid and the elements for moving the impurities are made as grooves arranged spirally in the side wall of the drum throughout its length. Each groove has a cylindrical side wall whose external surface protrudes beyond the external surface of the side wall of the drum, and two face walls are arranged perpendicularly to the cylindrical side wall.

Abstract: The apparatus serves the purpose of separating trash from less heavy firm articles in a flow of liquid. It has a casing wherein a horizontal revolving screen is located with members which impart motion to trash. Accomodated in the casing coaxially with the revolving screen is a contrivance for the separation, feeding and discharging of trash which is attached to the revolving screen at the end thereof where the flow of liquid carrying the uncleaned firm articles enters the revolving screen. The contrivance consists of an outward cylinder and an inward cylinder. The outward cylinder is provided with ports through which the outflow of liquid and the smaller particles of trash from the revolving screen are fed. Ports provided in the inward cylinder serve to admit the greater particles of trash and discharge all the trash separated. Partitions subdivide the space between the cylinders into passages extending transversely with respect to the longitudinal axis of the contrivance.