Patent ID: 8348645
Filing Date: 2013-01-08
Classification: F02M,F04C

Abstract:
1. A pump comprising: a pressure plate having two inlets and two outlets, wherein each of said two inlets has an auxiliary intake port in fluid communication with the respective said two inlets, and each of said two outlets has an auxiliary discharge port in fluid communication with the respective said two outlets; a cam ring/rotor assembly adjacent to the pressure plate, the cam ring/rotor assembly comprising: a rotatable cam ring having an opening; a rotor disposed within the opening of the cam ring, the rotor having a plurality of radial slots; and a plurality of vanes configured to move within the plurality of radial slots; wherein a pumping chamber is defined by a space between the rotor and the cam ring; wherein the rotation of the rotor within the cam ring causes the plurality of vanes to radially extend and retract within the pumping chamber; wherein the movement of the plurality of vanes and the rotation of the rotor is configured to discharge into the two outlets and the respective auxiliary discharge port a fluid drawn into the pumping chamber via the two inlets and the respective auxiliary intake port; wherein the rotor includes a plurality of notched areas between adjacent radial slots; and wherein the rotor rotation causes the notched areas to be in fluid communication with the auxiliary intake ports and the auxiliary discharge ports.