Tank filler socket for motor vehicles has blocking device to prevent filling with unsuitable fuels and inner diameter to fit correctly sized pump nozzle only

摘要

The tubular/conical filler socket has an internal diameter to accommodate a pump nozzle with a set outer diameter denoting a certain type of fuel. Any larger diameter cannot or only in sufficiently fit into the socket. The blocking device consists of a closure cap (4), which is spring-loaded and fastened pivoted to the filler socket (1) on the side facing the fuel tank. The cap is held in normal closed position by three or more elastic releasable pivoted locking bolts (5) distributed over the cap edge.