Liquid dispensing nozzle having vapor recovery arrangement

Claim 1

A liquid dispensing nozzle having a body and a spout extending from said body and having its free end for disposition in nonsealing manner in the opening of a fill pipe of a tank or the like, the improvement comprising an inner tube and an outer tube spaced from and concentric with said inner tube, said inner tube and said outer tube defining the spout, said inner tube being in communication with a source of liquid to allow liquid to flow from said body, said outer tube external diameter being less than the inner diameter of the fill pipe thereby permitting air-flow between the inner surface of the fill pipe and the outer surface of said outer tube when each of said inner tube and said outer tube of said spout is disposed in the fill pipe, said inner and outer tubes further defining an annular passage therebetween, vapor return means within said body in communication with one end of said annular passage, the other end of said annular passage extending axially into the fill pipe, vacuum means communicating with said vapor return means to cause air to flow into the fill pipe around the outer surface of the portion of said outer tube within the fill pipe when each of said inner tube and said outer tube of said spout is disposed in the fill pipe to dispense liquid into the tank through said inner tube to form an air seal within the fill pipe thereby preventing vapor escape from the fill pipe into the atmosphere wherein said vacuum means causes all vapor from the tank during filling and air drawn into the fill pipe to exit from the tank fill pipe through said annular passage and said vapor return means to vapor recovery means or the like, separate from the source of liquid.