Hose assembly and method of making the same

Claim 1

In a hose assembly having a first fluid passage therein for conveying a volatile liquid in one direction to a container and a second fluid passage therein for returning the vapors of the volatile liquid from the container, the assembly comprising a flexible inner hose having an outer peripheral surface and defining said first fluid passage therein, and a flexible outer hose having an inner peripheral surface and being disposed around said inner hose, said inner peripheral surface of said outer hose and said outer peripheral surface of said inner hose defining said second fluid passage therebetween, said inner hose having a Venturi means therein that tends to remove liquid from a certain area of said second fluid passage, said Venturi means having an inlet opening that is generally flat and generally faces said inner peripheral surface so as to be adapted to interconnect said second fluid passage with said first fluid passage through said Venturi means, the improvement wherein said outer hose is corrugated in a helical manner so that said inner peripheral surface thereof defines alternating crests and valleys with each crest and each valley defining an arcuate surface, said arcuate valleys and crests being of such a size that the same will not completely block said inlet opening when said inlet opening is engaging said inner surface of said outer hose and is facing substantially vertically downwardly.