Thermal barrier

Claim 1

In combination with a structure having an aperture providing a means for transmission of thermal energy as between the inside and outside of the structure, thermal barrier for covering and uncovering the aperture comprising; a pair of tracks, means mounting the tracks adjacent opposite sides of the aperture; a plurality of elongated, closed, hollow slats extending between the tracks, each slat providing a dead air space and having one side which is planar and the slats being arranged side-by-side and extending parallel with one another; pivot means connecting adjacent slats and each pivot providing for the slats connected thereto to pivot relative to one another and for the slats to move in unison in translation in a direction generally normal to the axes of the slats; on the opposite ends of each slat a pair of fingers, each finger extending generally parallel to the slat axis; each said track including a first hollow compartment co-extensive with the track and having an open side thru which the fingers extend into the compartment, means at the edges of the open side slideably engaging each of said fingers, a second hollow compartment co-extensive with the track and at least a portion of which extends over the ends of the slats and over portions of the contiguous planar sides and means on the second compartment slidingly engaging the planar sides, said engagements providing for the slats to move in translation along the tracks and said engagements on the planar sides each constituting a seal minimizing passage of air therebetween; said slats, pivots and tracks constituting thermal barrier means and movement of the slats in translation providing for the slats to be positioned to cover the aperture to reduce transmission of thermal energy thru the aperture and to be positioned to uncover the aperture to unimpede said transmission; and storage means for receiving said slats when the slats are positioned to uncover said aperture.