Patent attributes
An apparatus for an architectural opening comprises a plurality of panels pivotably connected together. At least one of the plurality of panels comprises a frame comprising a plurality of first frame members connected to a plurality of second frame members at respective interfaces to define at least one opening. The interfaces are defined by ends of the plurality of first frame members positioned at least partially within respective apertures defined in the plurality of second frame members. Each of the first and second frame members comprise an internal cavity filled with a gas having a thermal conductivity between 2 mW/(m·K) and 25.5 mW/(m·K) at 25 degrees Celsius. The at least one of the plurality of panels also comprises an inset panel secured within the at least one opening.
