Liquid fuel blockage removal device with a venturi and bypass passages

Claim 1

In a liquid dispensing hose for distributing liquid fuel from a pump to a 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 which defines with the inner tube an annular vapor passage for recovering fuel vapors from the fuel tank, means for removing from said annular vapor passage liquid fuel which is formed by condensed fuel vapor comprising: an aspirating section disposed in said outer sleeve and connected in serial flow communication with said inner tube, said aspirating section including a venturi throat therein and having connecting means at each end for connecting said aspirating section to end portions of said inner tube whereby said aspirating section and venturi throat form part of said fuel conduit; at least one axial fuel bypass passage in said aspirating section, said passage forming part of said fuel conduit; aspirator means defining a plurality of radial ports in said aspirating 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 vapor passage, said check valve means respectively having inlet openings directed radially outwardly of said aspirating section and facing toward said tubular outer sleeve, whereby liquid fuel collected in said annular passage adjacent said aspirating section is drawn through said aspirator means due to suction generated in said venturi throat.