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 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: The invention relates to a turbomolecular vacuum pump comprising rows of rotor blades (3) and rows of stator blades (4) that alternately engage with one another at varying angles of attack (&agr;). The aim of the invention is to improve the properties of such a pump. To this end, at least a part of the blades (1 or 2) of the rows of blades (3 or 4) that are mounted on the pressure side thickens towards the rim facing the pressure side.

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) with a stator (3) and a rotor (4), which form at least two pump stages (12, 13, 14) with one gas inlet (23, 28) each, as well as with junction for the pump stages, which are equipped with junction openings (36,37) and serve for the connection of the gas inlets (23, 28) of the pump stages with devices to be evacuated; in order to avoid high conductance losses it is proposed that the junction openings (36, 37) are located in a plane which is disposed laterally adjacent to the pump stages (12, 13, 14) such that the distance between the junction openings (36, 37) and the rotor axis (15) is of minimum feasible size.

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 friction vacuum pump (1) is provided with pump sections of different designs, of which the pump section on the inlet side consists of turbomolecular pump stages (14, 15) and a further pump section of Siegbahn stages (16, 17) with spiral grooves (19), whereby the active pumping surfaces of the Siegbahn stages are formed by facing surfaces of an annular rotor disc and an annular stator disc (16, 17). To simplify the production of such a pump, it is proposed that the annular stator discs (16) have spiral grooves (19).

Abstract: The invention relates to a gas friction pump with a high vacuum (HV) area and a forevacuum area (FV) area; in order to avoid, on the pumping surfaces, the formation of solid materials when such pumps are used for chemical processes, it is proposed that the HV area and the FV area have different working temperatures, so that the temperature of the HV area is lower than the temperature of the FV area (FIG. 1).

Abstract: A lubricating system for supplying oil to the bearings of a shaft having a central oil pumping passage open at one end. An oil delivery tube reaches into the oil pumping passage. To achieve a positive transfer of the oil from the oil delivery tube to the inner wall of the oil pumping passage, means are associated with the upper end of the oil delivery tube for bringing the oil onto the inner wall of the oil pumping passage.

Abstract: A device for moving a gas at a subatmospheric pressure with a screwthread-like device on at least one of the facing surfaces of a rotor spacedly surrounded axially by a relatively-rotatable stator insulates the stator from a housing for the device to prevent thermal variation of the space between the rotor and stator and, thus, keeping the gas-moving action constant.

Abstract: The invention relates to a turbomolecular vacuum pump (1) with a rotor (6) and at least one antifriction bearing (17) for the rotor, the stationary ring (19) of the antifriction bearing being seated on the wall of a sleeve (21) which in turn is supported through at least two O-rings (26, 27) made from an elastic material on a casing section (13) of the pump. To improve the heat flow from the sleeve (21) to the casing (13) of the pump, the annular space (29) formed by two seal rings (26, 27), the sleeve (21) and the pump casing (13) is filled with a medium (31) promoting heat flow from the sleeve to the adjacent part of the casing.