Float valve for fuel tank in motor vehicles has cylindrical float with conical inclined surface to generate closing force on impact with fuel surge

摘要

The valve has a cylindrical float (4) with a closure element (5) at the top to close a ventilation aperture (9). The outer jacket of the float has an inclined conical surface formed by a longitudinal section decreasing in size towards the lower float end. The float is spring-loaded in closing direction (6). It is held in a guide (3), the lower end section of which is in connection with the tank interior via a window (19).