Vacuum pump

Abstract

The invention relates to a vacuum pump having a cup-shaped housing, a rotor, eccentrically mounted for rotation in the housing, at least one blade mounted in or on the rotor, and a housing cover closing the cup-shaped housing, wherein the rotor has a rotor shaft that passes through the cup-shaped housing and by which the rotor is driven, wherein the rotor shaft is sealed by means of a seal in the housing.

1 - 7 . (canceled) 
     
     
         8 . A vacuum pump, comprising:
 a cup-shaped housing;   a rotor eccentrically mounted for rotation in the housing and having a rotor shaft which traverses the cup-shaped housing and drives the rotor;   at least one blade mounted on or in the rotor;   a housing cover to close the cup-shaped housing, and   a labyrinth seal to seal the rotor shaft in the housing.   
     
     
         9 . The vacuum pump of  claim 8 , wherein the housing has a housing attachment for receiving the rotor shaft. 
     
     
         10 . The vacuum pump of  claim 9 , wherein the housing attachment has a drive opening for receiving the rotor shaft, said drive opening forming a sealing surface for the labyrinth seal. 
     
     
         11 . The vacuum pump of  claim 8 , wherein the labyrinth seal is arranged on the rotor shaft. 
     
     
         12 . The vacuum pump of  claim 8 , wherein the rotor shaft is provided with a circumferential groove for receiving the labyrinth seal. 
     
     
         13 . The Vacuum pump of  claim 10 , wherein the drive opening is configured in a region of a free end thereof as a stepped bore and is tapered.