Patent ID: 7781040
Filing Date: 2010-08-24
Classification: F16L,Y10T

Abstract:
1. An insulating composite tubular assembly comprising: a) a tubular core of fluid conducting flexible material having an external curved surface; b) a first set of a plurality of superimposed substantially coextensive strips of material, which first set is thin and flexible enough to bend to substantially conform to the curved external surface of said core; c) a flexible first sheet substantially around said strips to confine said strips together in a superimposed relation; d) a second set of a plurality of superimposed substantially coextensive strips of material, which second set is thin and flexible enough to bend to substantially conform to the curved external surface of said core; e) a second flexible sheet separate from said first sheet substantially around said second set of strips to confine said strips in said second set together in a superimposed relation, which said second sheet is in at least partially non-bonding contact with said first sheet to provide limited sliding relative movement therebetween upon the flexing of said tubular core; and f) at least one void-generating layer comprising: