Patent ID: 8673138
Filing Date: 2014-03-18
Classification: B01D,F02M

Abstract:
1. A fuel filter comprising: a filter housing having a first inlet for receiving a first flow of fuel contaminated with water, a first outlet for filtered fuel, a second outlet for filtered fuel, and a water outlet; a filter element disposed in the filter housing and configured to be penetrated by the first flow in a radial direction from a raw side to a pure side; a hydrophobic diaphragm having an inlet side fluidly communicating with the pure side of the filter element and an outlet side fluidly communicating with the first outlet for filtered fuel, wherein the diaphragm retains water on the inlet side and permits fuel to flow from the inlet side to the outlet side and to the first outlet, and wherein the diaphragm fluidly separates the first outlet for filtered fuel from the second outlet for filtered fuel; a smooth-flow water separator fluidly connected in series with the inlet side of the diaphragm so as to receive a second flow of fuel contaminated with water from the inlet side of the diaphragm, wherein the water separator separates the fuel from the water in the second flow and directs the separated fuel to the second outlet for filtered fuel and the separated water to the water outlet; and wherein fuel is discharged from the water separator by a pressure difference generated in the fuel filter.