Flexible hose - made of elastic tubes interlaced with z-section spiral and inclined cord layers

摘要

A hose is made of an internal supporting tube of elastic material, with a profiled band wound around it in a spiral. This band consists of two offset flanges which partly overlap each other. A layer of elastic material over the band is followed by two layers of parallel cords at an angle of up to 20 deg. to the centre line and in opposite directions. The final external layer is again a hose of elastic material.. This allows low-cost materials to be used for the hose without reducing its strength.