Method for applying liner to air duct
AssigneeDuct Seal Systems, Inc.
InventorGregory W. Roberts
Life of this patent
Estimating the term…
Abstract
A system for sealing an air duct by coating the interior of the duct with a material similar to the coating used for spray-on truck bed liners. A spray device applies the liner material to the interior surface of the ducts and the spray device is held in the center of the duct by retractable sets of wheels. The spray device is removably attached to a supply hose that provides liner material to the spray device from a storage tank via a supply pump. The supply hose is first fed through the duct, the spray head is attached to the supply hose and the liner material is sprayed onto the duct as the spray head is retracted through the duct. The system can be either computer or manually controlled and can optionally employ an electrostatic unit to put opposite electrical charges on the duct and the liner material.
Claims7
A method for applying liquid liner material to the interior surfaces of an air duct comprising the following steps:
- a. inserting a first end of a supply line through a first opening in an air duct that is to be lined and pushing the first end of the supply line through the air duct so that the first end of the supply line stops at the entrance to the supply plenum for an air conditioning unit that provides conditioned air to the air duct,
- b. initiating flow of liquid liner material to the material to a spray device attached to the first end of the supply line via the supply line that has its opposite second end attached to a supply pump and supply tank that are designed to supply liquid liner material through the supply line to the spray device and simultaneously with initiating a pulling force on the supply line and the attached spray device so that the spray device deposits liquid liner material onto the interior surfaces of the duct continuously between the first opening in the duct and the entrance to the supply plenum as it is pulled through the duct.
Dependencies are inferred from the claim text.