Patent ID: 9599362
Date: 2017-03-21
CPC Classifications: A01K,F16L,F24F

Claim:
1. An air flow control system comprising: an elongated, cylindrical, flexible duct having a first set of air exit holes positioned along a first portion of said duct; and a flexible liner sheet within said duct and extending longitudinally along said duct, said liner sheet having opposite longitudinal edges connected to said duct, said liner sheet in part defining a first longitudinal compartment and a second longitudinal compartment within said duct, said liner sheet being permeable such that air directed longitudinally along the first longitudinal compartment escapes through the air exit holes and when directed along the second longitudinal compartment forces said liner sheet to be in substantial contact against an inner surface of said first portion of said duct containing the air exit holes to only partially reduce the flow of air through at least one of the exit holes, said liner configured to contact against an inner surface of a second portion of said duct, said second portion in part defining said second longitudinal compartment.