G-rotor pump

Abstract

In a G-rotor pump for the conveyance of fuel in a motor vehicle, pockets are arranged in an external rotor. Dirt particles in the fuel can collect in the pockets. A wear of regions of the external rotor and of the internal rotor which roll on one another is consequently kept particularly low.

What is claimed is:  
     
         1 . A G-rotor pump used as a fuel pump in a motor vehicle, comprising: 
 an external rotor; and    an internal rotor moveable relative the external rotor, in which pump a conveying space is delimited between the external rotor and the internal rotor, wherein pockets are arranged in at least one of the external rotor and the internal rotor.    
     
     
         2 . The G-rotor pump as claimed in  claim 1 , wherein the pockets are designed as depressions arranged in tooth bottoms of the external rotor.  
     
     
         3 . The G-rotor pump as claimed in  claim 1 , wherein the pockets are designed as depressions arranged in tooth bottoms of the internal rotor.  
     
     
         4 . The G-rotor pump as claimed in  claim 1 , wherein the pockets are arranged in the tooth bottoms of the external rotor or tooth bottoms of the internal rotor.  
     
     
         5 . The G-rotor pump as claimed in  claim 1 , wherein the pockets extend over an entire height of the external rotor and/or of the internal rotor.  
     
     
         6 . The G-rotor pump as claimed in  claim 1 , wherein the pockets have a groove-shaped design.  
     
     
         7 . The G-rotor pump as claimed in  claim 1 , wherein the pockets have a radius in a bottom region.  
     
     
         8 . The G-rotor pump as claimed in  claim 1 , wherein at least one of the external rotor and the internal rotor are manufactured from metal.  
     
     
         9 . The G-rotor pump as claimed in  claim 1 , wherein at least one of the external rotor and the internal rotor are manufactured from plastic.  
     
     
         10 . The G-rotor pump as claimed in  claim 1 , wherein a bottom plate and a cover of the G-rotor are manufactured from plastic and/or sintered metal.