A vane pump assembly for a fluid pump , said pump assembly comprising: a pump housing having a proximate portion and a distal portion , wherein the proximate portion of the housing is adapted to be mounted to a pump motor ; a fluid inlet port in the distal portion of the housing ; a fluid outlet port in the proximate portion of the pump housing ; a distal bearing member disposed within the pump housing , the distal bearing member having a first side and a second side , a cavity formed in the second side of the distal bearing member , and a plurality of inlet orifices in fluid flow communication with the fluid inlet port ; a first cam ring disposed within the pump housing adjacent the distal bearing member , the first cam ring having an elliptical interior opening; a rotor adapted to be mounted to a pump drive shaft and disposed within the opening in the first cam ring , the rotor having a first side and a second side , a cavity in the first side of the rotor , and a plurality of radial slots ; a plurality of vanes slidably received within the slots of the rotor ; a second cam ring having an elliptical shape ; and a proximate bearing member disposed within the pump housing adjacent the first cam ring , the proximate bearing member having a plurality of outlet orifices in fluid flow communication with the fluid outlet port ; wherein rotation of the rotor causes fluids from the fluid inlet port to be drawn through the plurality of inlet orifices at an initial fluid pressure, to be directed along a plurality of fluid flow paths disposed between an inner surface of the first cam ring and an outer surface of the rotor , and to be ejected through the plurality of outlet orifices to the fluid outlet port at a second fluid pressure which is greater than the initial fluid pressure, characterised in that the second cam ring comprises a polymeric material and is disposed in the cavities formed in the distal bearing member second side and the rotor first side . a pump housing having a proximate portion and a distal portion , wherein the proximate portion of the housing is adapted to be mounted to a pump motor ; a fluid inlet port in the distal portion of the housing ; a fluid outlet port in the proximate portion of the pump housing ; a distal bearing member disposed within the pump housing , the distal bearing member having a first side and a second side , a cavity formed in the second side of the distal bearing member , and a plurality of inlet orifices in fluid flow communication with the fluid inlet port ; a first cam ring disposed within the pump housing adjacent the distal bearing member , the first cam ring having an elliptical interior opening; a rotor adapted to be mounted to a pump drive shaft and disposed within the opening in the first cam ring , the rotor having a first side and a second side , a cavity in the first side of the rotor , and a plurality of radial slots ; a plurality of vanes slidably received within the slots of the rotor ; a second cam ring having an elliptical shape ; and a proximate bearing member disposed within the pump housing adjacent the first cam ring , the proximate bearing member having a plurality of outlet orifices in fluid flow communication with the fluid outlet port ; <EOS>