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US 5,205,334 AGranted
Double layer shade
AssigneeVerosol USA Inc.
InventorRen Judkins
Life of this patent
Estimating the term…
Abstract
A roller shade is mounted within a headrail and a pleated shade is attached to the bottom of the headrail to form a double layer shade. The two shades are independently operable. When both shades are extended the double layer shade provides a thermally efficient window covering.
Claims27
An energy efficient double layer shade having two independently movable layers comprising
- a) a headrail having a bottom and an interior sized to receive a roller shade,
- b) a panel of pleated material attached to the bottom of the headrail thereby permitting the pleated material to be folded and unfolded;
- and
- c) a roller shade of the type having a roller and a rolled panel of shade material positioned within the headrail thereby permitting the panel of shade material to be unrolled to a position substantially parallel to the pleated material when the pleated material is unfolded wherein the unfolded pleated material and unrolled shade material are sufficiently close to one another so that convection currents will not develop therebetween.
1 more element
Dependencies are inferred from the claim text.