Abstract: A stator-rotor arrangement for a vacuum pump, in particular for a turbomolecular pump, includes a plurality of stator disks (18) that cooperate with a rotor element (14). The stator disks (18) are disposed between rotor disks (16). The stator disks (18) are held by way of stator rings (20, 22). At least two of the stator rings (20) include protrusions (24) that are connected together by way of holding elements (28, 30). This makes pre-installation of the rotor-stator arrangement (12) or placement of the rotor-stator arrangement (12) in a housing (10) possible. The protrusions (24) are disposed in the area of corners (32) of the housing (10).

Abstract: A stator-rotor arrangement for a vacuum pump, in particular for a turbomolecular pump, includes a plurality of stator disks (18) that cooperate with a rotor element (14). The stator disks (18) are disposed between rotor disks (16). The stator disks (18) are held by way of stator rings (20, 22). At least two of the stator rings (20) include protrusions (24) that are connected together by way of holding elements (28, 30). This makes pre-installation of the rotor-stator arrangement (12) or placement of the rotor-stator arrangement (12) in a housing (10) possible. The protrusions (24) are disposed in the area of corners (32) of the housing (10).

Abstract: A multi-stage vacuum pump includes a plurality of rotor elements (14, 16) disposed on a common shaft (10) in a pump housing (12) for configuring multiple pump stages (18, 24, 26). The shaft is driven by an electric motor (40). An inner bearing element (42) is disposed between two rotor elements (14, 16) such that a mechanically favorable bearing arrangement is implemented using a simple configuration of the bearing elements (42, 44) as roller bearings. This is possible in particular due to the separation into two rotor elements (14, 16).

Abstract: A side channel pump, preferably a vacuum pump, includes a driven rotor (16) and a fixed stator (14). The rotor (16) and the stator (14) define a pump channel circulating in a peripheral direction. Blades are fixed onto the rotor, protruding into the cross-section of the pump channel. The pump channel also includes a blade-free side channel (44). The pump channel (22) containing the side channel (44) extends in a helical manner around the rotor (16). The pump channel is advantageously not limited to the length of a winding but can have the length of substantially any number of uninterrupted windings. As a result, a high suction performance and a high compression ratio in the pump can be obtained.

Abstract: A turbomolecular vacuum pump (1) has an inlet (3) and an outlet (4) and rotor and stator vanes (5 and 6), situated between the inlet and outlet. The rotor vanes (6) have front sides (11) and rear sides (12) in relation to the direction of rotation. At least a part of the rotor vanes (6) have a rear side (12) which is convex on the suction-side and concave on the delivery side. Alternately, at least part of the rotor vanes (6) have a front side (11), which is concave on the suction side and convex on the delivery side.

Abstract: The invention relates to a pump which is being a side channel pump, preferably a vacuum pump, essentially comprising a driven rotor (16) and a fixed stator (14). The rotor (16) and the stator (14) define a pump channel circulating in a peripheral direction. Blades are fixed onto the rotor, protruding into the cross-section of the pump channel. The pump channel also comprises a blade-free side channel (44). The pump channel (22) containing the side channel (44) extends in a helical manner around the rotor (16). The pump channel is, therefore, no longer limited to the length of a winding but can have the length of a plurality of random uninterrupted windings. As a result, a high suction performance and a high compression ratio in the pump can be obtained.