Jacketed strip-wound metal hose

Claim 1

JACKETED STRIP-WOUND FLEXIBLE METAL HOSE HAVING AXIALLY INTERLOCKING HELICAL CONVOLUTIONS IN WHICH EACH CONVOLUTION IS MOVABLE RELATIVE TO ADJOINING CONVOLUTIONS AXIALLY OF THE HOSE THROUGH THE INTERLOCK BETWEEN A FIRST POSITION IN WHICH ADJOINING CONVOLUTIONS ARE IN DIRECT CONTACT WITH ONE ANOTHER AND A SECOND POSITION IN WHICH ADJOINING CONVOLUTIONS ARE SPACED A SUBSTANTIAL DISTANCE APART, AND A SEAMLESS JACKET OF PLASTIC MATERIAL FITTING SNUGLY ABOUT THE OUTER SURFACE OF SAID HOSE BUT FREE FROM ANY NOTICEABLE HOOP STRESS WHEN THE HOSE IS FREE FROM THE INFLUENCE OF ANY SUBSTANTIAL TENSILE FORCE, SAID HOSE IN THE UNBENT CONDITION WITH ITS AXIS SUBSTANTIALLY STRAIGHT HAVING THE CONVOLUTIONS HELD IN SAID FIRST POSITION BY FRICTIONAL ENGAGEMENT THEREWITH OF THE JACKET WITHOUT ANY PENETRATION OF THE JACKET MATERIAL BETWEEN SAID CONVOLUTIONS, WHEREBY WHEN THE JACKETED HOSE IS BENT ADJACENT CONVOLUTIONS CAN MOVE ONLY AWAY FROM EACH OTHER ON THE OUTSIDE OF THE BEND AND WRINKLING OF THE JACKET DUE TO MOVEMENT OF CONVOLUTIONS TOWARD EACH OTHER ON THE INSIDE OF THE BEND IS PREVENTED.