초록 ▼

A cap for a fuel tank of the type comprising a labyrinth path between the fixed elements and the moving elements of the cap. Said labyrinth path is formed by concentric ribs defining grooves which intercommunicate by way of interruptions forming baffles, and a sealing element disposed on said ribs.

A cap for a fuel tank of the type comprising a labyrinth path between the fixed elements and the moving elements of the cap. Said labyrinth path is formed by concentric ribs defining grooves which intercommunicate by way of interruptions forming baffles, and a sealing element disposed on said ribs. Said sealing element has at least one projection which is adapted, in one angular position of the sealing element with respect to the labyrinth path, to close said path and, in another angular position, not to close said path.

대표청구항 ▼

A cap for a fuel tank comprising a closure element having an inside surface which in use faces towards the interior of the tank, means defining a labyrinthine venting passage on said inside surface, said passage having exit and entrance ends, and plug means movable between first and second positions

A cap for a fuel tank comprising a closure element having an inside surface which in use faces towards the interior of the tank, means defining a labyrinthine venting passage on said inside surface, said passage having exit and entrance ends, and plug means movable between first and second positions relative to said means defining said passage, in one of said positions being effective to close said passage and in the other position being effective to open said passage.