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US 5,141,396 AGranted
Regenerating pump with graphite and plastic casing and impeller
AssigneeVDO Adolf Schindling AG
InventorsChristoph Schmidt, Thomas Werner
Life of this patent
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Abstract
A feed unit, in particular for the feed of fuel, has an electric drive motor with a pump unit coupled with it, the pump unit being built of two housing parts and a pump wheel arranged between them. The two housing parts and the pump wheel are each developed as a casting or compression molding from a mixture of graphite and plastic. The end surfaces of the pump wheel and of the two housing parts which contact each other are roughened.
Claims5
A feed unit, suitable for feeding fuel, having an electric drive motor and a pump unit coupled to the drive motor, the pump unit comprising
- a first housing part having a first annular sector-shaped feed channel which debouches into an axial inlet opening;
- a second housing part having a second annular sector-shaped feed channel of the same diameter as the first feed channel and debouching into an axial outlet opening;
- a central passage opening for a drive shaft of the drive motor;
- a pump wheel which is operatively connected to the drive shaft, the pump wheel being arranged between said first and said second housing parts and having a plurality of tooth-shaped blades which are arranged in a circumferential region and cooperate with the sector-shaped feed channels;
- and
- wherein said first and said second housing parts and said pump wheel are produced as casting or compression moldings, of a mixture of graphite and plastics;
- an
- end surfaces of said pump wheel and said first and said second housing parts which are located for contact with each other are roughened surfaces.
5 more elements
Dependencies are inferred from the claim text.