Internal gear-wheel pump comprising reinforced channels

Abstract

The invention relates to a gerotor fuel pump ( 2 ) comprising ribs ( 18, 19 ), which are located in channels ( 16, 17 ) that are configured as inlets and outlets and that are situated in housing parts ( 8, 9 ). The ribs ( 18, 19 ) are positioned transversely to the maximal extension of the cross-sections of the channels ( 16, 17 ), producing a high degree of stability in the channels ( 16, 17 ). The housing parts ( 8, 9 ) are composed of plastic.

1 . A gerotor fuel pump for feeding fuel from a fuel tank of a motor vehicle having a housing, having a rotor pair mounted between two housing parts, and having elongated inlet and outlet ducts arranged in the housing, 
 characterized in that at least one of the ducts ( 16 ,  17 ) has at least one rib ( 18 ,  19 ) for strengthening the housing ( 10 ).    
   
   
       2 . The fuel pump as claimed in  claim 1 , characterized in that the at least one rib ( 18 ,  19 ) is arranged transversely with respect to the longest extent of the duct ( 16 ,  17 ) cross section, and connects opposing edges of the housing ( 10 ), which delimit the duct ( 16 ,  17 ), to one another.  
   
   
       3 . The fuel pump as claimed in  claim 1  or  2 , characterized in that the rib ( 18 ,  19 ) is produced in one piece with those regions of the housing ( 10 ) which adjoin the ducts ( 16 ,  17 ).  
   
   
       4 . The fuel pump as defined in  claim 1 , wherein at least one of the housing parts ( 8 ,  9 ) is produced from plastic.  
   
   
       5 . The fuel pump as defined in  claim 4 , wherein the housing parts ( 8 ,  9 ) are screwed to one another, one of the plastic housing parts ( 8 ) having receptacles ( 22 ) for metal nuts ( 21 ).