Abstract: A rotary machine for a compression or an expansion of a gaseous working fluid comprises a machine housing (10), a rotor (11) which is rotatably mounted within said housing and which, in its peripheral outer surface, is provided with at least one helically extending groove (14), having a depth varying along its length and serving as a flow passage for the working fluid, and a rotatable separation wheel (15) which is provided with a number of blades (17), evenly distributed in the circumferential direction of said wheel and serving as separation elements, successively insertable into the groove (14) of the rotor (11) and arranged to divide the groove (14) into a number of working chambers which follow one after the other in the longitudinal direction of the groove and which, during coordinated simultaneous rotation of the rotor (11) and the separation wheel (15), are brought to move along the groove (14) in the longitudinal direction thereof while successively changing their volume.

Abstract: An apparatus arranged for grinding, polishing, etc. with a closed loop 5 of grinding, polishing, etc. belt mounted on the output shaft of a motor 1 and driven by a rotating drive wheel 4. This loop belt 5 is intended to be applied against a workpiece which is to be machined by means of the loop belt 5, said closed loop 5 having loop portions differing from one another in a running direction. The loop 5 is steered by steering members 2:8, 9:10, 11 to adopt an essential L-shape and comprising at least two loop portions, of which the loop portion 5d which is arranged to make contact with said workpiece is preferably selected shorter than the other loop portion 5a, 5b, 5f, 5g.Said drive wheel 4 for driving of the belt 5 is arranged displaceable relative to a foundation 17 by a guide 19 steered by the foundation 17 and turnable by means of guide members 3 arranged on the guide. An angle .phi.

Abstract: The disclosure relates to an apparatus for the controlled infeed, storage and discharge of elongate objects (20, 21, 22, etc.). The apparatus essentially includes a rotary drum (1) and at least one strap, belt or the like (2, 3, 4). The invention, the strap, belt or the like (2, 3, 4) is connected to the rotary drum (1) which is disposed to rotate in two different directions for winding up and unwinding of the belt (2, 3, 4) or the like. The elongate objects (20, 21, 22, etc.) are aligned with the drum (1), are disposed on the belt (2, 3, 4) or the like, and are arranged to be held by the belt (2, 3, 4) or the like against the rotary drum (1). The belt (2, 3, 4) or the like and/or the elongate objects (20, 21, 22, etc.) are moreover disposed to be prevented from movement in their storage position by a holding device (6).