| 摘要 |
A glass coated gas dispersing impeller, said impeller comprising a hub, havi ng a centrally located hole, said hole having a central axis, said hole being sized for passage over a drive shaft having an essentially vertically extending longitudinal axis so that the central axis of the centrally located hole corresponds with the longitudinal axis of the shaft, said impeller having a plurality of angles and edges, all of which have a rounded configuration, said impeller further comprising a plurality o f blades secured to said hub and radially extending from the central axis, each of sa id blades having a leading concave surface and a trailing convex surface both of which are defined by a lower edge, an upper edge, an inner edge and an outer edge, sai d concave surface being configured so that the upper edge overhangs the lower edge.</S DOAB>
|
