DIAPHRAGM TYPE RECIPROCATING PUMP

摘要

A diaphragm type reciprocating pump is provided to set operating pressure of oil in a hydraulic chamber easily and prevent damage to a diaphragm due to the increase of the oil in the hydraulic chamber. An oil supplement valve body is formed with an oil outlet path. A check valve is mounted in the oil outlet path for keeping the path closed at the backward stroke of a piston while opening the path temporarily at the forward stroke of the piston so as to discharge the oil from the hydraulic chamber to an oil storage part.