Patent attributes
In a piston valve in a compressing pump, a discharge base formed in the center of the piston valve has a planar shape having discharge spouts formed corresponding with each inlet slots. A 3-bladed anti-backflow plastic gasket covers the top of the discharge base such that each blade can block corresponding discharge spouts. As wobble wheels of the compressing pump push the diaphragm in turns, the water flow from each said inlet slot at each area will continuously run into each discharge spout at each area in said discharge base in turn so that each blade of the gasket moves up and down in turn as well, to achieve an open-and-shut effect of the discharge spouts. Therefore, drawbacks of leakage, pressure loss, or failure can be prevented, and the serving life of the gasket can be prolonged, improving the compressing and discharging efficiency of the pump.
