Abstract: A combined socket for simultaneously establishing electric as well as hydraulic/pneumatic connections comprising a preferably slot-shaped receiving element in which electric contacts as well as hydraulic/pneumatic ports are integrated and comprising a locking mechanism for locking the positive contact by a plug, the locking mechanism being actuated hydraulically/pneumatically, electrically or electromagnetically.

Abstract: A friction pump (1), such as turbomolecular pump, includes a steel housing (2) in which a steel shaft (15) is supported by a bearing (16). A rotor (4) with a central bore (21) is mounted on the shaft. In order to reduce the risk of the joint area between the rotor and the shaft becoming loose, a ring groove (26, 31) which encompasses the joint area between the rotor is provided in an area adjacent at least one of the faces of the rotor. A reinforcing ring (34, 35, 38) of a high strength, low thermal expansion material encompasses one of a thrust member (28) and cylindrical rotor sections (32, 37) adjacent the shaft.

Abstract: A friction vacuum pump (1) with a frame (5), stator (3), rotor (4) and housing; all functional elements of the pump are combined into one unit (22), which, in turn, can be inserted into a housing (19, 55) that has been adapted to a specific application; using this procedure, all separate connection housing can be eliminated and optimal conductance can be achieved (FIG. 1).

Abstract: The invention relates to a friction vacuum pump (1) containing at least one turbomolecular pump stage (6, 7), a screw pump stage (11, 12) connected to the delivery side of the pump, and a filling stage (24) arranged between the turbomolecular pump stage (6, 7) and the screw pump stage (11, 12). According to the invention it is proposed that said filling stage (24) be configured as a centrifugal stage in order to simplify the construction thereof.

Abstract: A vacuum pump includes a rotor and at least one bearing that is supplied with a lubricant and that is situated, during operation, in a negative-pressure environment. In order to extend the useful life of the bearing, it is proposed that the bearing is formed from a ceramic material.

Abstract: A vacuum pump includes a rotor and at least one bearing that is supplied with a lubricant and that is situated, during operation, in a negative-pressure environment. In order to extend the useful life of the bearing, it is proposed that the bearing is formed from a ceramic material.

Abstract: A shaft (3) having a central channel (8) supplies shaft bearings (5, 6, 7) with oil. The central channel leads to an oil exit opening (9) situated in the region of a shaft bearing (2). In order to be able to supply the shaft bearing (2) with oil in metered fashion, a covering (14) is provided on the shaft bearing (5, 6, 7), with the covering (14) comprising a cylindrical section (11) that surrounds the shaft (3) in non-contacting fashion and covers the annular gap between the stationary bearing ring (7) and the rotating bearing ring (5). The cylindrical section (11) has an increased height (h) over a part of its circumference, and the oil exit opening is situated between the lower part (12') and the upper part (12") of the inwardly directed edge of the covering.