DEVICE FOR WATER PRODUCTION Russian patent published in 1995 - IPC

FIELD: water supply systems; particular, devices for production of underground water. SUBSTANCE: device for water production has filter with shut-off balls and internal annular projection in upper part. Movable case is located outside the filter. Located in movable case under filter is piston with discharge valve. Arranged inside the filter above annular projection is bushing with suction valve. Located between bushing and annular projection is spring. Device also has drill bit. It has upper perforated washer with rod stop. Perforated washer is located above bushing. Located under spring is lower perforated washer. Device has air hammer with radial air flushing courses in its lower part. Air flushing courses are covered from outside by means of flexible collar (check valve). Rod stop of upper washer is engageable with discharge valve. Rod stop of lower washer is engageable with suction valve. EFFECT: accelerated well sinking. 2 dwg