Patent ID: 6983762

Claim:
In a pressure regulator for a fuel delivery system of an internal combustion engine for regulating a fuel pressure, including a valve, which has a valve ball that is pressed against a valve seat in the closed position by the action of a valve leaf spring, the improvement comprising, a recess ( 37 ; 46 ) associated with the valve ball ( 18 ) or the valve leaf spring ( 16 ), and a segment ( 31 ; 48 ) of a hemisphere of the valve ball ( 18 ) oriented toward the valve leaf spring ( 16 ) protruding into the recess ( 37 ; 46 ), wherein the recess is constituted by an annular opening ( 37 ) of a damping ring ( 29 ; 29 a ), disposed between the valve ball ( 18 ) and a surface ( 35 ) of the valve leaf spring ( 16 ) oriented toward it, the damping ring being held against the valve leaf spring ( 16 ) by the valve ball ( 18 ).