DIAPHRAGM PUMP WITH PULSE AIR-OPERATED DRIVE Russian patent published in 1997 - IPC

FIELD: pump engineering. SUBSTANCE: pump has housing and two diaphragms arranged inside the housing for permitting reciprocation. The diaphragms define pump and driving chambers. The rigid centers of the diaphragms are interconnected through an axle. The distributing slide valve has passageways for supplying and discharging fluid. The locking projections are spring-loaded with respect to the diaphragm. The slide valve has two additional diaphragms, hollow bushing, supplying valve and two springs which spring-loads the supplying valve with respect to the diaphragms. The housing of the pump is provided with openings for discharging fluid and is separated into two portions interconnected through the diaphragms of the slide valve and hollow bushing. The supplying valve of the pump is provided at the center of the hollow bushing and arranged at the axis. The total length of the additional springs is less then the length of the axle by the value of the free portion of stroke of the valve. The projection of the slide has sealing spacers. The slide valve is made up as two same hollow cylindrical bushings interconnected through the diaphragms of the slide valve and hollow bushing. EFFECT: enhanced delivery. 5 cl, 5 dwg