| 摘要 |
<p>A pump is disclosed wherein, in order to provide switching ability between two different delivery outlets, a stator casing bounds two superimposed manifold chambers, each chamber being in communication with the pump impeller housing through a respective tangential conduit. The chambers are sealed from each other by an elastic membrane operative to selectively cut off valve seats in each manifold chamber for rotation of the pump impeller in either directions.</p> |
