Patent ID: 7959026

Claim:
Vent cap for oil tanks of machines and motor equipment, comprising: a cup ( 1 ), equipped with means of engagement ( 4 ) with a housing of a tank filler, said cup ( 1 ) carries a guide ( 7 ) supporting a level rod ( 8 ), said guide ( 7 ) has a main central, cylindrical body ( 7 b ), wherefrom ribs ( 7 a ) for anchoring to the cup ( 1 ) depart, at the top of the main, central cylindrical body ( 7 b ) there are provided flexible supporting flaps ( 7 c ) carrying means of engagement ( 10 ) of the level rod, a lid ( 12 ) mounted on the top of the cup and which snaps thereon, integral in the movement thereof, including an outermost cylindrical diaphragm ( 12 b ) and an innermost cylindrical diaphragm ( 12 c ), concentric to the cap axis and which, when cooperating with the cup ( 1 ), define labyrinth elements that allow only for the flow of vapours and air a gap being provided between the cup ( 1 ) and the lid ( 12 ) allowing the outflow of the vapours found in said tank, wherein said supporting flaps ( 7 c ) are two, opposite, and may be elastically spread apart.