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Internal gear fuel pump

Image Number 3 for United States Patent #5156540.

Feed unit, in particular for the feeding of fuel, having an electric drive motor and a pump unit coupled to it, which comprises a base plate, an intermediate plate having a recess for rotating pump parts and a cover, at least the base plate and the cover consisting of a ceramic material and the end sides of the base plate and of the cover which face the intermediate plate having ground surfaces.

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