Raisable-curtain door providing low heat loss
AssigneeNergeco
InventorBernard Kraeutler
Life of this patent
Estimating the term…
Abstract
A raisable-curtain door for closing a door-bay through a wall between two volumes of air maintained at different temperatures includes two vertical side uprights, each of which forms a slideway delimited by two vertical edges and a raisable curtain having side portions that slide in the slideways. Each of the side uprights includes two vertical metal bars forming respective edges of the slideway, which bars are separated from each other so as to define the associated slideway over substantially the entire height of the upright. A first of the vertical bars is located closer to the wall than the second of the vertical bars. The first bar is in draft-proof contact with the wall and in substantially draft-proof contact with the curtain over the entire height of the curtain when the curtain is down.
Claims17
A raisable-curtain door for closing a door-bay through a wall separating two volumes of air at different respective temperatures, said door comprising:
- two vertical side uprights each of which forms a slideway delimited by two vertical edges;
- and
- a raisable curtain having side portions that slide in said slideways,
- wherein each side upright includes vertical metal first and second bars each forming one of the vertical edges of the respective one of the slideways, said first and second bars in each of said side uprights being separated from each other so as to define a respective slideway extending over substantially the entire height of each said side upright,
- wherein said first bar is disposed a predetermined distance from said wall and said second bar is disposed in draft-proof contact with the wall, and
- wherein said second bar is in substantially draft-proof contact with said curtain over the entire height of the curtain, when said curtain is down.
Dependencies are inferred from the claim text.