Symmetrical vane pump apparatus and method

Abstract

The invention relates to a vane cell pump ( 1 ) comprising an electrical drive unit with an electric motor and a motor shaft ( 6 ), a pump chamber ( 2 ) that connects to the electrical drive unit and has a pump ring ( 3 ), and also a rotor ( 4 ) that is arranged concentric to the motor shaft ( 6 ) within the pump chamber ( 2 ) and is in active connection with the motor shaft ( 6 ), wherein the rotor ( 4 ) has a number of guide slots ( 40 ) that extend inward from the outer circumference of the rotor and in each of which a vane ( 5 ) is arranged in a moveable manner with two vane ends ( 50, 51 ) opposite each other. The vane ends ( 50, 51 ) of each vane ( 5 ) have a mirror-symmetric design relative to the transverse center plane of the vane.

1 - 9 . (canceled) 
     
     
         10 . A vane cell pump comprising:
 an electrical drive unit with an electric motor and a motor shaft;   a pump chamber that connects to the electrical drive unit and has a pump ring;   a rotor that is arranged concentric to the motor shaft within the pump chamber and is in active connection with the motor shaft;   the rotor has a number of guide slots that extend inward from the outer circumference of the rotor and in each of which a vane is arranged in a moveable manner with two vane ends opposite each other; and   the vane ends of each vane being symmetric relative to a transverse center plane of the vane.   
     
     
         11 . The vane cell pump according to  claim 10 ; wherein the vane ends of each vane have a symmetric design relative to the longitudinal center plane of the vane. 
     
     
         12 . The vane cell pump according to  claim 10 ; wherein each vane is symmetric relative to the transverse center plane of the vane. 
     
     
         13 . The vane cell pump according to  claim 10 ; wherein each vane is symmetric relative to the longitudinal center plane of the vane. 
     
     
         14 . The vane cell pump according to  claim 10 ; wherein the vane ends of the vanes are curved. 
     
     
         15 . The vane cell pump according to  claim 10 ; wherein the vane ends of the vanes are convex. 
     
     
         16 . The vane cell pump according to  claim 10 ; wherein the pump ring has elliptical inner contours. 
     
     
         17 . The vane cell pump according to  claim 10 ; wherein each of the guide slots of the rotor has a base section whose width is greater than the width of the vanes. 
     
     
         18 . The vane cell pump according to  claim 10 ; wherein the base sections of the guide slots are rounded.