siphon-pump

from The Century Dictionary.

• noun A form of steam jet-pump placed at the lower end of a delivery-pipe, near the surface of the water to be raised, having also a short suction-pipe, and taking its steam at the bottom through a bent pipe or inverted siphon, which extends downward, and turns upward at its lower end to unite with the steam induction-port of the pump. Compare ejector and injector.