Patent ID: 6247492
Filing Date: 2001-06-19
Classification: B67D,F16K,Y10T

Abstract:
A fuel storage tank (3) having an overfill protection device (OPD) for shutting off flow of fuel into the tank when the amount of fuel in the tank reaches an intended maximum fill level, said OPD including a fill valve (4) located in or connected to a fuel fill tube (5) and linked to a piston or diaphragm (6), which is displaceable in a chamber, said chamber communicating with an aperture (53) which is arranged to vent the chamber into the tank when said aperture is open to cause displacement of the piston or diaphragm and the consequential closure of the fill valve, said aperture being controlled by a vent valve which normally maintains said valve closed, but is linked to fuel level sensing means for sensing when the level of fuel in the tank reaches said intended maximum fill level and causing said vent valve to open.