Double walled containment fuel transfer hose

A multi-walled hose assembly having an outer hose for containing fluid leaks from an inner hose, comprising:

• an elongate inner hose, made of resilient, materials for carrying a pressurized fluid, said inner hose comprising
• a fluid-resistant layer;
• an elongate outer hose closely encircling said inner hose, said outer hose being made from a resilient material, for containing any fluid which may leak out of said inner hose;
• a means for spacing said inner hose from said outer hose so as to form a gap therebetween;
• and,
• means for frictionally engaging said inner hose and said outer hose, wherein said means for spacing comprises at least one rib which projects from one of an inner wall of said outer hose and an outer wall of said inner hose towards the other hose such that said inner and outer hoses are concentric, wherein said inner hose is thicker than said outer hose to accommodate a pressurized fluid.

A leak-resistant fuel hose assembly comprising:

• an elongate flexible inner fuel-carrying hose comprising resilient materials which inner hose is resistant to a seepage of fuel therethrough, said inner hose being sufficiently thick to withstand a flow of pressurized fuel therethrough;
• an elongate flexible containment hose enclosing said inner hose, said containment hose being thinner than said inner hose and being made from a resilient material;
• an annular gap formed between said inner hose and said containment hose, wherein said containment hose contains any fuel which may have leaked or seeped out of said inner hose and into said gap;
• and,
• at least one rib extending between said inner hose and said containment hose in said annular gap for spacing said inner hose from said outer hose, said at least one rib being of one piece with one of said inner hose and said outer hose and frictionally engaging the other of said inner hose and said outer hose to retard movement therebetween, said at least one rib being made of a resilient material.

A piping system for conveying a fluid from an outlet port of a pump to the inlet port of an above-ground fluid dispenser, comprising:

• a fluid transfer hose of a flexible material having an inlet end and an outlet end, said fluid transfer hose comprising
• a fluid-resistant layer, wherein said fluid transfer hose is resistant to a seepage of fluid through a wall thereof and is sufficiently thick to withstand a flow of a pressurized fluid therethrough;
• a containment hose of a flexible material having a first end and a second end, said containment hose surrounding said fluid transfer hose wherein said containment hose is thinner than said fluid transfer hose;
• a rib for spacing said fluid transfer hose from said containment hose so as to form a gap therebetween, said gap containing any fluid which may be leaked by said fluid transfer hose, wherein said rib is secured to one of said fluid transfer hose and said containment hose and contacts the other of said fluid transfer hose and said containment hose;
• a first coupling to which an inlet end of said fluid transfer hose is secured;
• and,
• a second coupling to which said outlet end of said fluid transfer hose is secured.