
1) Ancient Roman technology 2) Greek invention
Found on
https://www.crosswordclues.com/clue/chain-pump

The chain pump is type of a water pump in which several circular discs are positioned on an endless chain. One part of the chain dips into the water, and the chain runs through a tube, slightly bigger than the diameter of the discs. As the chain is drawn up the tube, water becomes trapped between the discs and is lifted to and discharged at the to...
Found on
http://en.wikipedia.org/wiki/Chain_pump

• A pump consisting of an endless chain, running over a drum or wheel by which it is moved, and dipping below the water to be raised. The chain has at intervals disks or lifts which fit the tube through which the ascending part passes and carry the water to the point of discharge.
Found on
http://thinkexist.com/dictionary/meaning/chain_pump/
Chain' pump` A pump consisting of an endless chain, running over a drum or wheel by which it is moved, and dipping below the water to be raised. The chain has at intervals disks or lifts which fit the tube through which the ascending part passes and carry the water to the point of discharge.
Found on
http://www.encyclo.co.uk/webster/C/51

A chain-pump is a pump consisting in principle of an endless chain equipped with a number of valves or buckets moving round
Found on
http://www.probertencyclopaedia.com/browse/GC.HTM

a pump consisting of buckets, plates, or the like, rising upon a chain within a cylinder for raising liquids entering the cylinder at the bottom.
Found on
https://www.infoplease.com/dictionary/chain-pump
No exact match found.