FIELD: transportation of liquid through pipe lines by man power. SUBSTANCE: pump has a housing, cylinder, inlet and outlet holes, supply passages, suction and delivery valves, offset crank fitted on shaft provided with handle. Jointed hinge-type connecting rod has limited angle of turn. Piston with sealing members and piston pin id tadially shifted towards shaft of crank by definite amount. EFFECT: enhanced reliability. 2 dwg
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