| 摘要 |
A pump has a cylindrical casing, a discoid rotor in the casing having arms each extending in an axial direction from the rotor and sliding over the inner surface of the casing upon rotor rotation, each arm having a flap pivoted at one end to that arm and having its other end slidably engaging a curved surface of an adjacent arm. An inner member freely rotates over an eccentric shaft and is coupled by links to the flaps so that, upon rotation, the flaps pivot towards and away from the casing to effect pumping action. Each arm, flap, link, and the inner member is of constant cross-sectional shape, so that production costs are low. |
