Abstract: Compressors with two cylinders in a horizontally opposed arrangement are known. The compressor according to the invention has a vertically aligned crankshaft. The electric drive motor is arranged underneath the cylinders and provided with a radial fan. The cooling air flows upwards along the drive motor and along the cylinders.

Abstract: A scraper device having a number of identical scraper elements that extend one beside another substantially over the width of a conveyer belt. Each scraper element basically comprises: a metal scraper or doctor blade that is in resilient engagement with the conveyer belt; an arm that supports the scraper blade; and a resilient articulation that is disposed at the free end of the support arm. The stationary part of the articulation is releasably secured to a common support tube that extends transverse to the direction of conveyance and parallel to the conveyer belt. The point where the scraper edge engages the belt in relation to the pivot axis of the resilient articulation is such that the base of a perpendicular line from such axis to the belt lies on the approach side of the belt at a slight distance ahead of the point of engagement.