摘要 |
<p>A centrifugal pump (10) for drawing a fluid through a chamber (9) of a member (7) coupled to an axially rotatable shaft (12) comprising a projection (14) arranged to be fixed relative to the shaft (12). The projection has a passage (16) leading to a vent (30), the passage (16) arranged to communicate with the chamber of the member (7). At least a portion of the length of the passage (16) extends in a direction from the shaft (12) having a radial component. In use, rotation of the shaft (12) causes a centrifugal force on fluid in the passage (16), thereby drawing fluid from the chamber (9) of the member (7) through the passage (16) and ejecting it from the vent (30).</p> |