HOUSEHOLD PUMP Russian patent published in 2008 - IPC F04B9/14 

FIELD: engines and pumps.

SUBSTANCE: household pump is intended for in taking and lifting ground waters from aquifers, artesian wells, wells and water areas, in particular for irrigation purposes and water supply in the country houses. The pump contains a cylindrical case with the drain branch pipe located in its top, a piston, a water intake pipe with the filter, a piston valve arranged at the piston bottom and a non-return valve. The piston represents a pipe with its section above the piston valve having a smoothly varying diameter. First, the said diameter increases to the case inner diameter, then it decreases to the initial size. Right above the varying diameter section, a drain channel representing an elongated cutout in the pipe wall. The said non-return valve is a dual element, in the form of two ball valves spaced apart in height and incorporating packers and is located at the case bottom and above the pump case attachment to intake pipe is arranged.

EFFECT: higher reliability raises; lower weight and longer life.

8 cl, 3 dwg