Hose construction
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsTetsu Kitami, Jun Mito, Toyotaka Narita
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Abstract
Hoses for transporting or otherwise handling refrigerant and oil fluids are disclosed which are comprised of an inner tube, an outer cover and a reinforcing layer interposed therebetween. The inner tube includes at least two walls, one being an inner resinous wall and the other being an outer rubbery wall having specified moduli at 100%. The outer cover is formed by a selected class of rubbers having a higher modulus at 100% than the outer wall of the inner tube. The resulting hose is securely interconnectable with metal fittings, highly impermeable to gaseous and oily fluids, sufficiently resistant to stress cracking and adequately flexible.
Claims6
A hose comprising an inner tube, a reinforcing layer and an outer cover superimposed one on another, said inner tube including at least two walls, one being an inner resinous wall formed by a polyamide resin and the other being an outer rubbery wall having a 100% modulus of 15 to 40 kgf/cm.sup.2, said outer cover having a 100% modulus higher than that of said outer rubbery wall and in the range of 20 to 50 kgf/cm.sup.2.
Dependencies are inferred from the claim text.