SUBMERSIBLE WELL PUMP WITH IMPROVED DIAPHRAGM

摘要

A composite diaphragm for a hydraulically driven diaphragm pump that incorporates both non-rigid and semi-rigid materials to obtain the benefits of both, wherein the non-rigid materials provide desired resistance to flex fatigue, and wherein the semi-rigid materials provide desired shape characteristics to thereby increase pumping capacity of a hydraulically driven positive displacement diaphragm pump.