Abstract: A rotating helical charger for compressible media consists essentially of a housing (1), in which two symmetrically constructed displacement disk (6, 7) are rotated by drive elements (18-23). The two displacement disks are equipped on one side with helical ribs (14). To form a conveying space (15), the ribs engage each other and seal with their free frontal sides (24) against the opposing displacement disk. To maintain the sealing effect, a pressure chamber (26) is provided, which communicates with the outlet (16) of the charger and may be acted upon by an axially displaceable annular disk (28), actively connected with an axially movable displacement disk (6). The pressure chamber (26) may be connected by means of a valve (32) with the atmosphere.

Abstract: An automatic lubricant metering device consists essentially of a housing (4), from inside of which a piston (5) is conveying a lubricant (15) through a feeder line (12) to the lubricating location (2) of a revolving shaft (1). The automatic feature consists of that the spring-loaded piston (5) is connected with a pin (6) made of an abradable material. The advance of the piston (5) is a function of the abrasion of the pin (6) on the appropriately roughened surface of the shaft. The lubricant is contained in a compressible bellows (11) equipped with a feeder line (12) to the lubricating location (2). The feed to the lubricating location is conducted in the area of the shaft through a pipe (13) located preferably without contact in a center bore (14) of the shaft. The outlet of this pipe opens into a radial bore (16) connected with the lubricating location (16).