Rubber hose for automotive fuel line
AssigneesNissan Motor Co., Ltd., Togawa Rubber Manufacturing Company, Limited
InventorsSeikoh Satoh, Tadashi Suzuki
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Abstract
An automotive fuel hose comprising a two-ply rubber tube covered with a reinforcing fiber layer and further with a protective rubber layer. The two-ply rubber tube is constituted of a very thin inner layer of a fluorine rubber resistant to fuel, even to sour gasoline, and an outer layer of a synthetic rubber, such as epichlorohydrin rubber or ethylene-acrylic rubber, which is less resistant to sour gasoline but is superior in cold resistance. Both the inner and outer layers are formed by extrusion, preferably simultaneously.
Claims8
A hose for automotive fuel lines, comprising:
- a two-ply rubber tube constituted of an inner layer of a copolymer of hexafluoropropylene with vinylidene fluoride which is resistant to hydrocarbon fuels including sour gasoline, formed by extrusion to serve as an innermost layer of the hose and an outer layer of a synthetic rubber selected from the group consisting of ethylene-acrylic rubber and epichlorohydrin rubber, which is less resistant to said fuels but has a better cold resistance than said fluorine rubber, formed by extrusion so as to bond to said inner layer, said inner layer having a thickness in the range from about 0.2 mm to about 0.7 mm, said outer layer having a thickness in the range from about 0.5 mm to about 1.0 mm and not smaller than the thickness of said inner layer;
- a tubular reinforcing layer of a heat-resistant fibrous material intimately covering said outer layer;
- and
- a tubular protective layer of a synthetic rubber intimately covering said reinforcing layer.
Dependencies are inferred from the claim text.