Patent ID: 7810524

Claim:
A resin composite hose including a first curved portion at an axial position thereof, and having a multilayer construction, the resin composite hose comprising: a resin layer having permeation resistance to a transported fluid and serving as a barrier layer, an inner rubber layer as an inner surface layer laminated on an inner side of the resin layer and an outer rubber layer laminated on an outer side of the resin layer, wherein the first curved portion has a shape that progressively increases in circumferential length and progressively flattens from a curve beginning end having a perfect circle cross-sectional shape to a curve terminal end having a flattened circle cross-sectional shape, wherein a cross-sectional area of a fluid path of the curve beginning end defines a minimum cross-sectional area of a fluid path through the first curved portion, wherein the first curved portion has a cross-sectional shape having a first axis passing from side to side thereof through a center thereof and a second axis passing from side to side thereof through the center thereof and perpendicular to the first axis, and the first curved portion is flattened progressively increasingly from the curve beginning end to the curve terminal end such that the first axis of the cross-sectional shape is maintained constant and the second axis of the cross-sectional shape is progressively increased, wherein a second curved portion is provided at an axial position other than the axial position of the first curved portion, and the second curved portion has a cross-sectional shape transitional portion that progressively changes in cross-sectional shape from a flattened circle cross-sectional shape of a curve beginning end thereof to a perfect circle cross-sectional shape of a curve terminal end thereof, and wherein a straight portion is provided between the first curved portion and the second curved portion, and the straight portion extends straight in an axial direction of the resin composite hose with a cross-sectional shape thereof being maintained in a flattened circle identical to the cross-sectional shape of the curve terminal end of the first curved portion.