Patent ID: 9028224
Filing Date: 2015-05-12
Classification: F04B,Y10T

Abstract:
1. A double diaphragm pump comprising: an inlet manifold with at least one passageway configured to direct fluid from an inlet port on the inlet manifold; an outlet manifold with at least one passageway configured to direct fluid to an outlet port on the outlet manifold; an air valve housing; first and second diaphragm housings; a first diaphragm located in a first diaphragm housing and a second diaphragm located in the second diaphragm housing; wherein each of the first and second diaphragm housings are in selective fluid communication with the inlet and outlet manifolds; wherein the first diaphragm separates the first diaphragm housing into first fluid and air chambers; wherein the second diaphragm separates the second diaphragm housing into second fluid and air chambers; an air management apparatus to move the first and second diaphragms in a reciprocally linear manner to draw and expel fluid into and from the double diaphragm pump, the air management apparatus comprises: an air inlet configured to receive pressurized air; a plate that includes first, second and third air passages wherein the first passage is in fluid communication with the first air chamber and configured such that as pressurized air fills the first air chamber in the first diaphragm housing the first diaphragm moves and expands the air chamber to push the fluid out of the first fluid chamber; and a first block that includes an air passage configured to selectively communicate with the second and third air passage in the plate to expel air from the second air chamber in the second diaphragm housing which are in fluid communication with each other to reduce the size of the second air chamber in the second diaphragm housing as the first air chamber expands.