An improved pumping system.

摘要

A fluidic pumping system comprises a reverse flow diverter(1 ) positioned below the level of liquid to be pumped and inserted between a charge vessel (4) and a delivery pipe (6). Control means including signal generating means (15), conveniently an ultrasonic transducer, effect alternate pressurising and venting of the charge vessel for pumping the liquid. A pipe (5) for the supply of compressed air to the charge vessel serves as a waveguide forthe signals from the signal generating means (15).