Coaxial hose assembly for vapor assist fuel dispensing system

摘要

Coaxial inner and outer flexible hoses connect with corresponding concentric tubular coupling members and define an inner vapor return passage and a surrounding annular fuel supply passage. The hoses and coupling members extend between a vapor recovery fuel dispensing pump and a vapor assist fuel dispensing nozzle. The tubular inner coupling member is formed in two threadably connected tubular sections which define an annular valve seat surrounding the vapor return passage. A poppet-type check valve member is supported within the vapor return passage down stream of the valve seat for axial movement from a normally open and unrestricting retracted position to a closed position engaging the valve seat in response to pressurized fuel entering the vapor return passage.