Hose construction

Claim 1

A GENERATOR COOLANT HOSE IN WHICH THE HOSE BODY COMPRISES A TUBULAR LINING OF SINTERED POLYTETRAFLUOROETHYLENE RESIN TO PROVIDE A FLUID TIGHT CORE RESISTANT TO RADIAL EXPANSION BUT HAVING COMPARATIVELY LITTLE RESISTANCE TO RADIAL COLLAPSE UNDER AN EXTERNALLY APPLIED CRUSHING FORCE, A LAYER OF DIELECTRIC MATERIAL SURROUNDING SAID CORE WITH THE EXCEPTION OF A SHORT PORTION TO EACH END BUT NOT BONDED ADHERENTLY THERETO, SAID LAYER BEING FORMED FROM ALTERNATING RINGS OF AN ELASTOMERIC MATERIAL AND RINGS OF A SUBSTANTIALLY RIGID DIELECTRIC MATERIAL, THE LATTER HAVING SUFFICIENT BODY STRENGTH TO BE RESISTANT TO RADIAL COLLAPSE TO A GREATER EXTENT THAN SAID LINING, WHILE SAID LAYER HASD BENDING FLEXIBILITY, AND AN OUTER JACKET OF SINTERED POLYTETRAFLUOROETHYLENE RESIN SURROUNDING SAID LAYER OF DIELECTRIC MATERIAL AND THE EXPOSED ENDS OF SAID LINING BOTH WITH A SHRINK FIT BUT WITHOUT BEING BONDED ADHERENTLY THERETO, THE HOSE BODY BEING ENTIRELY FREE FROM METALLIC MATERIAL.