| 摘要 |
A rotary vane pump having a rotatable rotor in an elliptical chamber and a plurality of radially slidable vanes dispersed around the rotor, and having an intake phase and a discharge phase of rotor rotation, wherein liquid is admitted into the pump, pressurized and expelled from the pump at an elevated pressure. The improvement including passages in flow communication with the pressurized side of the pump vanes, and an auxiliary outlet communicating with the passages to provide an auxiliary pressurized liquid outlet from the pump, wherein the auxiliary pressure is developed by the pump vanes.
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