E06B 9/06(20130101), F24F 13/082(20130101), F24F 2011/0038(20130101)
In one embodiment, a variable screen includes a generally flat sheet having a front surface, a back surface, and a plurality of elongated slits that extend through the sheet from the front surface to the back surface, wherein the sheet includes a shape memory material that enables the slits to open into openings through which light and fluid can pass when a tensile force is applied to the sheet in a direction generally perpendicular to the slits and further enables the slits and openings to automatically when the tensile force is removed.
Weston, Mark, "Variable screening" (2015). USF Patents. 7.
University of South Florida