SUBMERGED DIAPHRAGM ELECTRIC PUMP Russian patent published in 1995 - IPC

FIELD: pump engineering. SUBSTANCE: sucking and delivery valves of working chamber are vertical and axially alined inside the pump head which is mounted inside the cylinder with a branch pipe having passageways. The compensator of oil volume changes, made up as a cylinder which encloses the pump with a spaced relation and defines a space, is mounted above the diaphragm. The space is in communication with under-diaphragm space through passages made in the head. The valve with a filter coupled with the compensator space through a passageway is mounted at the top part of the branch pipe. EFFECT: enhanced efficiency. 3 dwg