Patent ID: 7842396

Claim:
An apparatus for reducing the transfer of heat from a heat source to a protected object, the apparatus comprising: a heat shield having a heat reflective sheet, the sheet having a thickness bounded by a first sheet surface and a second sheet surface, the first sheet surface being configured for exposure to a medium flowing across such surface when the sheet is placed between the heat source and the protected object, the sheeting having a means for providing improved convective heat transfer from the sheet while substantially restricting the passage of the flowing medium and radiant heat through the sheet, the means comprising: a plurality of turbulence-generating protrusions having a single free edge and extending from the first sheet surface, the protrusions generating turbulent flow within the medium flowing across the first sheet surface; and a plurality of sheet apertures formed within the sheet, wherein each aperture is positioned substantially adjacent to at least a portion of one of the protrusions, and each aperture is bounded by a sheet edge and the free edge of the one of the protrusions, the free edge being partially maintained within the thickness of the sheet, wherein each of the plurality of sheet apertures has a length and a width, the width being less than the length and measuring between approximately 0.06 and 0.25 millimeters.