Patent ID: 6929742

Claim:
A fine filter including a fuel feed unit of a motor vehicle with a filter element and a pump, comprising: a device to fasten the filter element to the fuel feed unit and to a surge chamber which surrounds the fuel feed unit; and a preliminary filter connected to a lower part of the pump and supplied fuel via a rising pipe, wherein the filter element is in an annular configuration and is provided to fasten to circumferential surfaces of the fuel feed unit and the surge chamber and has at least two sections which are essentially aligned axially and are arranged concentrically with an axis of symmetry, and the fuel feed unit including the feed pump having first and second impellers, the first impeller drawing the fuel through the preliminary filter and pumping the fuel upwardly through the rising pipe into an upper portion of the surge chamber, the fuel traveling downwardly from the upper portion of the surge chamber and through the fine filter to the second impeller of the pump.