| 摘要 |
<p>The valve comprises a closed chamber 7 equipped with a lower inlet orifice 8 and an upper outlet orifice 9 both connected to the ventilation conduit, an internal circular immobile cup 10 held away from the inside walls of the chamber and from the inlet orifice, a vertically displaceable fitment surmounting the cup comprising a float 13 and a needle 16, equipped with a ring seal 17, joined to the float which when the fitment is in the raised position closes the outlet orifice 9, and means (11, 14, 15) for bringing about an upward displacement of the fitment following an inclining of the chamber 7. In addition, the annular space between the cup 10 and the inside walls of the chamber 7 is shaped to form a venturi 18 which is kept in communication, through at least one passage 20, with the volume 19 contained between the cup 10 and the base of the float 13. The valve, mounted upon a ventilation conduit, allows gases to move through in both directions but prevents any escape of liquid fuel. <IMAGE></p> |
