Hydraulically actuated diaphragm pumps

摘要

A diaphragm pump (100) comprising: a housing defining a first pumping chamber (114), a second pumping chamber (116), and a hydraulic fluid chamber (126,128); a first flexible diaphragm (118) separating the first pumping chamber (114) from the hydraulic fluid chamber; a second flexible diaphragm (120) separating the second pumping chamber (116) from the hydraulic fluid chamber; a rod (130) mechanically linking the first flexible diaphragm (118) and the second flexible diaphragm (120) such that an expansion of one of the first and second flexible diaphragms exerts a contraction force on the other of the first and second flexible diaphragms; and a piston (172) disposed within the hydraulic fluid chamber and configured to reciprocate to cause a hydraulic fluid contained within the hydraulic fluid chamber to alternately exert an expansion force on the first and second flexible diaphragms.