Abstract:
A novel device and method to thermally seal openings such as air conditioner sleeves, ducts and chimney is disclosed and claimed. The device includes insulating layer and gasket layers sandwiched in between outer shells.

Description:
This application claims priority from Provisional Patent Application No. 61/354,314 filed Jun. 14, 2010. 
    
    
     TECHNICAL FIELD &amp; BACKGROUND 
     This invention pertains generally to the field of accessories used with air conditioning equipment and particularly to products which cover or seal air conditioning sleeves. 
     Many room air conditioning units are mounted in openings in the outer walls of buildings referred to as air conditioning sleeves. When these air conditioning units are replaced a person simply slides the old unit out of the sleeve and slides the new unit back in. Where an air conditioning unit is absent from the sleeve the opening to the sleeve can be sealed in many ways. Typically the opening is closed off by fitting a metal cap over the ends of the sleeve on the interior and exterior sides of the sleeve. 
     In colder climates, the through the wall air conditioning units are often a major source of heat loss from a building structure during the cold winter months. Air conditioner units are not air tight and can allow cold outside air to migrate into the interior. Cold air can also blow through the gap between the sleeve interior and the ac unit resulting in a colder apartment and a loss of energy due to greater use of the heating equipment in the building. Even with the use of weatherization products such as caulk or foam strips air leakage gaps can still exist and no matter what material is used around the ac unit there is still heat loss that exists through the air conditioner itself. Apartment tenants have used pillows, roll plastic, garbage bags with duct tape, and material air conditioning covers that do very little to combat the heat loss problem. There are often air leeks with other products because the seal between the products used and the sleeve are generally not air-tight or air-sealed. 
     SUMMARY 
     A device and method to seal an air conditioning unit wall opening, commonly referred to as an air conditioner sleeve, when an air conditioning unit is removed. The insulation plug is easily inserted to provide a thermal barrier and allows the air conditioning unit to be reinserted if desired after the plug is installed. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  depicts a front view of an insulating plug. 
         FIG. 2  depicts a typical insulating plug with 6 layers. 
         FIG. 3  depicts a top view of an insulating plug. 
         FIG. 4  depicts a side view of an insulating plug. 
         FIG. 5  depicts a perspective view of an insulating plug. 
         FIG. 6  depicts an insulating plug being inserted into an air conditioning sleeve. 
         FIG. 7  depicts an insulating plug being positioned into final position in an air conditioner sleeve. 
     
    
    
     DETAILED DESCRIPTION 
     A front view of a typical insulating plug is shown on  FIG. 1 . As shown on  FIG. 2  a typical insulating plug ( 1 ) includes 6 layers. The outer shells ( 2  and  7 ) are flat rectangular shape as shown on the drawings and preferably made of semi-rigid plastic which is vacuum formed and molded. Each exterior shell includes indentations ( 9 ) that allow fastening devices such as grommets and plungers ( 10 ) to be inserted for clamping the 6 layers together. Handles ( 8 ) on each outer shell are typically heat fused to the shells ( 2  and  7 ). 
     Insulating layers ( 3  and  6 ) such as foam are designed to fill the inside cavity in each of the outer shells ( 2  and  7 ). One or more gaskets ( 4  and  5 ) are located between the insulating layers ( 3  and  6 ) and outer shells ( 2  and  7 ). The insulating layers and gaskets are parallel to each other and to the outer shells, and extend across the entire surface of the outer shells. As shown on  FIGS. 1-6 , the gaskets ( 4  and  5 ) extend beyond the entire perimeter of the outer shells to allow flexibility ensuring contact with the surface of the air conditioning sleeve to minimize any possible leakage. The use of more than one gasket such as the 2 shown on  FIG. 2  provides further assurance that there are no gaps between the air conditioning sleeve and the insulating plug. 
     The insulating plugs can be sized to fill any air conditioning sleeve. Typically adjusting the size of the gaskets ( 4  and  5 ) is sufficient to accommodate most sleeve sizes. But the entire insulating plug can be sized to properly seal a sleeve when increasing the size of only the gasket negatively impacts the performance of the seal to be created in a particular sized sleeve. 
     The insulating plug is designed to be easily installed and removed. The rigid plastic exterior shell makes the product easy to maneuver into the open sleeve space and the double gasket will shape to any imperfections that exist in the sleeve itself. Once installed the sleeve is air sealed and no air leakage exists between the outside and inside of the building. The product is designed so that the air conditioner can be placed back in the sleeve after installation. The product is then removed at the end of the winter season. If no air conditioner exists in the sleeve the product can be left in the sleeve indefinitely. 
     Installing the product is done by tilting the product ( 1 ) on a diagonal from opposite corners of the sleeve ( 12 ) mounted in a wall ( 11 ) and placing the product ( 1 ) in the sleeve interior ( 13 ) as shown on  FIG. 6 . Once the product is placed in the sleeve it is straightened to be completely adjacent to the back of the sleeve and pushed into place until the entire product is flush against the back of the sleeve and the double gasket has formed a tight seal around the entire perimeter of the sleeve&#39;s back wall ( FIG. 7 ). The seal can be improved by running one&#39;s finger around the gasket to smooth out any small air gaps that may be visible. This results in a tight seal that prevents any cold air from leaking through the sleeve itself. 
     Other embodiments include varying the number of layers, materials used, number, location and configuration of handles; and types and location of fastening devices to secure the layers together. An insulating plug can also be designed and used to seal ducts. For example, insulating plugs could be designed for insertion in place of an air filter when the ducts are only used for air conditioning and not heat. Or, the insulating plug can be designed for insertion into a chimney. 
     Although several embodiments described above and by the claims serve to illustrate various concepts, components and techniques which are the subject of this patent, it is apparent to those of ordinary skill in the art that other embodiments incorporating these concepts, components and techniques may be used. It is understood that the scope of the following claims are not limited to the described embodiments and that many modifications and embodiments are intended to be included within the scope of the following claims. In addition the specific terms utilized in the disclosure and claims are used in a generic and descriptive sense and not for the purpose of limiting the invention described in the following claims.