Pump, in particular for a hydraulic unit

Abstract

The invention improves a pump provided with an eccentric cam bearing, a drive bearing, a drive shaft, an electric drive motor, and a pump housing. According to the invention, the pump housing includes a compensating chamber that enlarges a cam chamber of the cam bearing, to advantageously interrupt a transmission path for a leakage fluid from the cam chamber into the electric drive motor of the pump

1 - 6 . (canceled) 
   
   
       7 . A pump comprising:
 a cam bearing disposed in a cam chamber,   a drive bearing,   a drive shaft supported by the drive bearing,   an electric drive motor driving the drive shaft,   a pump housing, and   compensating means disposed in the pump housing which enlarge the cam chamber of the cam bearing.   
   
   
       8 . The pump as recited in  claim 7 , wherein the compensating means are embodied in the form of an annular groove. 
   
   
       9 . The pump as recited in  claim 8 , wherein the annular groove has a square or round cross section. 
   
   
       10 . The pump as recited in  claim 7 , wherein the compensating means interrupt a leakage path of a leakage fluid between the cam chamber and the electric drive motor and drain the leakage fluid into a leakage reservoir. 
   
   
       11 . The pump as recited in  claim 8 , wherein the compensating means interrupt a leakage path of a leakage fluid between the cam chamber and the electric drive motor and drain the leakage fluid into a leakage reservoir. 
   
   
       12 . The pump as recited in  claim 9 , wherein the compensating means interrupt a leakage path of a leakage fluid between the cam chamber and the electric drive motor and drain the leakage fluid into a leakage reservoir. 
   
   
       13 . The pump as recited in  claim 10 , wherein the leakage reservoir is situated at the bottom of a motor bore disposed in the pump housing. 
   
   
       14 . The pump as recited in  claim 11 , wherein the leakage reservoir is situated at the bottom of a motor bore disposed in the pump housing. 
   
   
       15 . The pump as recited in  claim 12 , wherein the leakage reservoir is situated at the bottom of a motor bore disposed in the pump housing. 
   
   
       16 . The pump as recited in  claim 7 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system. 
   
   
       17 . The pump as recited in  claim 8 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system. 
   
   
       18 . The pump as recited in  claim 9 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system. 
   
   
       19 . The pump as recited in  claim 10 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system. 
   
   
       20 . The pump as recited in  claim 11 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system. 
   
   
       21 . The pump as recited in  claim 12 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system. 
   
   
       22 . The pump as recited in  claim 13 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system. 
   
   
       23 . The pump as recited in  claim 14 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system. 
   
   
       24 . The pump as recited in  claim 15 , wherein the pump is used in a hydraulic unit of an ABS system and/or an ESP system.