Patent ID: 7201153

Claim:
A fuel system for an internal combustion engine ( 10 ), said system comprising: a fuel tank ( 13 ); a fuel pump ( 12 ); a fuel filter ( 19 ) located in a flow duct ( 14 ) between said fuel pump and fuel consumers ( 11 ) of the engine, said flow duct ( 14 ) comprising a valve chamber ( 20 ) located downstream of said fuel filter; a valve cone ( 24 ) is movably arranged in said chamber between an upper valve seat ( 20 b ) and a lower valve seat ( 27 ) and an upper part of the valve chamber ( 20 ) has an outlet ( 22 ) for bleeding to the fuel tank ( 13 ); said valve cone ( 24 ) is provided with an inner passage ( 25 ) having a valve seat ( 25 a ) which, under normal fuel pressure, interacts with a bleed cone ( 26 ) that is movable within said passage.