HYDRAULIC RAM Russian patent published in 2013 - IPC F04F7/02 

FIELD: engines and pumps.

SUBSTANCE: hydraulic ram comprises feed pipeline, working chamber, impact and delivery valves, air chamber and intake vessel communicated via pipe with working chamber. Extra pipe is arranged parallel with feed pipe. Hydraulic ram is equipped with closed water intake chamber with drain pipe fitted therein. Impact valves are arranged at discharge pipes and connected with control device composed of rotary drive made up of two-arm lever. Arms of said lever are pivoted via links with upper two-arm lever fitted at rotary handle pin. Impact valves are shaped to circle arcs, their diameters being equal to branch pipe appropriate outlets. Center of curvature of said arcs is located at control mechanism axle to cover branch pipes of appropriate housing working chambers in turns.

EFFECT: higher reliability and efficiency.