Blowable flexible innerduct

Abstract

The blowable flexible innerduct contains an outer innerduct structure and an inner innerduct structure. The outer innerduct structure contains at least one outer longitudinal chamber formed from at least one textile. The inner innerduct structure contains at least one inner longitudinal chamber, where each inner longitudinal chamber is located within an outer innerduct textile chamber and the at least one inner longitudinal chamber contains an inflatable tube. The inflatable tube has a wall thickness of less than about 0.5 mm. The inner longitudinal chamber alone has an air permeability of less than about 1 cfm, outer longitudinal textile chamber alone has an air permeability of greater than about 100 cfm, and the outer and inner longitudinal textile chambers together have an air permeability of less than about 1 cfm.

Dependencies are inferred from the claim text.