DIAPHRAGM PUMP Russian patent published in 1995 - IPC

FIELD: pump engineering. SUBSTANCE: two diaphragms connected with a hydraulic drive is mounted inside a housing constructed as three sections. The hydraulic drive is made up as two-sectional eccentric- washer hydraulic pulsator provided with hydraulically driven valves and hydraulically driven make-up pump. The working spaces of the valves are in communication with the opposite spaces of the hydraulic pulsator. The section of the housing, wherein the hydraulic pulsator is received, is provided with covers and stops which are screwed in a nut mounted in the bore of the housing with a thread. EFFECT: enhanced efficiency. 7 cl, 6 dwg