Patent ID: 6729307
Filing Date: 2004-05-04
Classification: F04B,F04C

Abstract:
An in-tank fuel pump for an automotive vehicle comprising:a pump housing having a pumping element, a low pressure inlet and a high pressure outlet, said pumping element adapted to pump fuel from said low pressure inlet to said high pressure outlet; a motor housing defining a motor cavity mounted to said pump housing; a motor mounted within said motor cavity in driving engagement with said pumping element, said motor including a stator mounted within said motor cavity and a rotor rotatably mounted within said stator, said rotor including a motor shaft extending therethrough wherein a first end of said shaft is supported by a first bearing mounted within said pump housing and engages said pumping element and a second end of said shaft is rotatably supported by a second bearing mounted within said motor housing: and a bypass channel adapted to allow a portion of the fuel being pumped into said high pressure outlet to flow into said motor cavity; said second bearing including a flow channel extending therethrough, said flow channel extending from said motor cavity to allow fuel to flow out from said motor cavity.