Patent ID: 7216681

Claim:
A simple, reliable system for automatically dosing fuel tanks with a fuel additive, particularly a concentrate containing a fuel borne catalyst (FBC) using gravity as the means of injection and is operable by insertion of a filler hose into the filler spout of a fuel tank, comprising: a supply line for feeding fuel additive by gravity from an additive reservoir and opening into a filler spout of a fuel tank; a ball-in-seat valve at the end of the supply line biased in normally closed position and operable to an open position by mechanically pressing a release on the ball-in-seat valve; a pivotable lever positioned within the filler spout and including a projection capable of mating with the ball-in-seat valve release upon pivotable movement, wherein the pivotable lever is configured to move from an initial position wherein it interferes with the insertion of a filler hose into the filler spout but movable by the spout by the insertion of a filler hose to a position wherein the projection presses the release on the ball-in-seat valve.