E - Fixed Constructions – 06 – B
Patent
E - Fixed Constructions
06
B
108/31, 108/32
E06B 3/30 (2006.01) A47H 23/06 (2006.01) E06B 9/24 (2006.01) E06B 9/40 (2006.01) F16L 59/08 (2006.01)
Patent
CA 1120784
ABSTRACT An apparatus for insulating against conductive, con- vective, and radiant heat transmission comprises a plurality of substantially non-transparent and generally parallel sheets. The sheets may be attached to a retracting device from which they can be drawn to extend and cover a building opening such as a window or onto which they can be retracted to uncover the opening. A number of spacers which may be in the form of collapsible or nestable devices are mounted within the apparatus to separate each pair of adjacent sheets and, thus, define a dead air space therebetween. At least one of the sheets has a surface, facing on the dead air space, that exhibits a low sur- face emittance. This surface emittance is sufficiently low to yield a total effective emissivity of the surface and dead air space of no greater than 0.60. Importantly, the spacer devices are designed so as not to abrade or otherwise harm the reflec- tive surface. The combination of these dead air spaces with the low emittance surface synergistically results in an apparatus having low total effective emissivity that effectively impedes radiant heat transfer. The dead air spaces also effectively impede conductive and convective heat transfer.
283735
Insulating Shade (limited Partnership)
Johnson & Hicks
LandOfFree
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