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US 7,434,520 B2Granted
Insulated cargo container doors
AssigneeMartin Marietta Materials, Inc.
InventorsRonald J. Zupancich, Joseph A. Seiter
Life of this patent
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Abstract
A method to insulate an existing door for an existing cargo container, such as a boxcar. In one implementation, the method includes attaching a liner to at least one surface of the door, incorporating an insulating layer, and attaching a gasket to the liner. A door retrofit by this method will have improved thermal efficiency.
Claims11
A method of insulating a door of an existing cargo container, wherein the existing cargo container door is made substantially of materials other than composite materials, the method comprising:
- adding a liner, comprising composite materials and having a first surface and a second surface opposing the first surface, to at least one surface of the existing cargo container door such that the liner substantially covers the surface of the door and the first surface of the liner is facing the door;
- adding an insulating layer between the first surface of the liner and the surface of the door;
- and
- adding a gasket to the second surface of the liner.
1 more element
Dependencies are inferred from the claim text.