Vapor passage fuel blockage removal
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, the hose having an inner tube defining a fuel conduit and a tubular outer sleeve that defines with the inner tube an annular passage for recovering fuel vapors from the fuel tank, the improvement is described comprising: a venturi section adapted for serial connection with the inner tube within the outer sleeve and comprising a cylindrical block having connecting means at each end for connection to end portions of the inner tube and defining a venturi having a throat which forms a part of the fuel conduit; aspirator means defining at least two radial ports in the venturi section for communicating between the venturi throat and the annular vapor passage; and a check valve means associated with each radial port for blocking fuel flow from the fuel conduit to the annular passage, the check valve means respectively having inlet openings directed radially outwardly of the venturi section and facing the tubular outer sleeve, whereby liquid fuel collected in the annular passage adjacent the venturi section is drawn through the aspirator means due to suction produced in the venturi throat.
- Assignee:
- Tokheim Corp., Fort Wayne, IN
- Patent Number(s):
- US 4749009
- OSTI ID:
- 7128823
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
AUTOMOTIVE FUELS
CONTAINERS
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUELS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LIQUID FLOW
NOZZLES
PIPES
RELIEF VALVES
TANKS
VALVES
VENTURI TUBES