OVERFILL VALVE CONSTRUCTION AND METHOD OF MAKING THE SAME

摘要

An overfill valve and a drop tube incorporating same to be utilized in a storage rank (22) having a chamber (30) therein for liquid fuel and the like and having an inlet riser pipe (24) extending therefrom and comprising a drop tube including a housing (36) for being inserted through the riser pipe and have a portion thereof disposed within the storage tank, a valve (64) in the drop tube having a valve seat (71) and a movable movable valve member (65) for opening and closing the valve seat so as to tend to close the drop tube between the opposed ends thereof, and a float (43) operatively interconnected to the valve member to cause closing of the valve member when the float is raised to a certain position relative to the portion by rising liquid in the chamber of the storage tank, the portion having an external wall that defines a generally cylindrical tubular section that has a generally circulate transverse cross-sectional configuration throughout the length thereof except for a depressed area (41) therein and in which the float can be disposed so as to be maintained substantially within the outline of the configuration when the drop tube has portion inserted through the riser pipe to be received in the chamber of the storage tank.