Vapor passage fuel blockage removal

Claim 1

In a liquid dispensing hose for distributing liquid fuel from a pump to a valved nozzle adapted to be inserted into the fill pipe of a vehicle fuel tank, said hose having an inner tube defining a fuel conduit and a tubular outer sleeve that defines with said inner tube an annular passage for recovering fuel vapors from said fuel tank, the improvement comprising: a venturi section adapted for serial connection with said inner tube within said outer sleeve and comprising a cylindrical block having connecting means at each end for connection to end portions of said inner tube and defining a venturi having a throat which forms a part of said fuel conduit; aspirator means defining at least two radial ports in said venturi section for communicating between said venturi throat and said annular vapor passage; and a check valve means associated with each said radial port for blocking fuel flow from said fuel conduit to said annular passage, said check valve means respectively having inlet openings directed radially outwardly of said venturi section and facing said tubular outer sleeve, whereby liquid fuel collected in said annular passage adjacent said venturi section is drawn through said aspirator means due to suction produced in said venturi throat.