Pohlé air lift pump

Pohlé air lift pump

[pō′lā ′er ‚lift ‚pəmp]
(mechanical engineering)
A pistonless pump in which compressed air fills the annular space surrounding the uptake pipe and is free to enter the rising column at all points of its periphery.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.