RFI shield structure for an electric motor in a fuel pump housing

Abstract

A shield structure for reducing radio frequency interference (RFI) from an electric motor situated within a fuel pump housing having an end with a fuel inlet and another end with a fuel outlet. The shield structure includes, first of all, an electrically insulative and hollow cup-like outer cover mountable on an end of the fuel pump housing adjacent the brushes and commutator of the electric motor. The outer cover has an inner surface, an outer surface, and preferably a fuel outlet opening defined therethrough. In addition, the shield structure includes an electrically conductive outer coat layer formed on substantially all of the outer surface of the outer cover. Lastly, the shield structure includes means for electrically grounding the outer coat layer to the electric motor of the fuel pump housing.

Dependencies are inferred from the claim text.