Patent ID: 7267373

Claim:
A connecting structure for a fluid transport hose of tubular geometry comprising: a hollow hose body of an elastic material possessing impermeability toward transported fluids, an inner layer of a resinous material having a hardness greater than the hardness of the hose body, said inner layer being laminated along the inner surface of the hose body over a predetermined distance except for an end part of the hose body, the inner layer having a leading edge abutting the end part of the hose body, the end part of the hose body adapted to be connected to a rigid companion pipe having an insertion end for insertion into the end part of the hose body, and a clamping member for clamping the hose to the companion pipe, and wherein, the connecting structure of the fluid transport hose further comprises an annular groove formed in the hose body and in the resin layer adjacent the leading edge of the resin layer and an elastic sealing ring inserted into said groove, said elastic sealing ring possessing impermeability to transported fluids, arranged in said annular groove to protrude inward of said inner layer surrounding said annular groove, the companion pipe including a ring-shaped protuberance extending in the outward radial direction at a position separated along the axial direction from the insertion end of the companion pipe, whereupon by insertion of the companion pipe into the hose body an outer surface of a portion of the companion pipe extending from the protuberance to the insertion end exerts elastic compression in the radial direction outwardly against said elastic sealing ring, to form a seal between said companion pipe and the resin layer; said clamping member is located on the end part of the hose body where the resin layer is removed, and the protuberance on said companion pipe rests between the leading edge of the resin layer and said clamping member when the insertion end of the companion pipe is inserted into the hose body.