Patent ID: 8776457
Filing Date: 2014-07-15
Classification: B65G,F24F

Abstract:
1. An entranceway to an enclosure, said enclosure having an exterior wall with a first opening located therein, said entranceway comprising a frame including a pair of laterally-spaced side wall portions and a top wall portion, said frame adapted to be placed into contact with said exterior wall of the enclosure and in surrounding relation to said first opening therein, said side wall portions residing on opposite sides of an inclined pathway such that said side wall portions and said inclined pathway are configured to extend distally away from the exterior wall of said enclosure and cooperate with said top wall portion to define a second opening distally located to the exterior wall, the first opening in the exterior wall of said enclosure having a lower boundary and the second opening at the distal end of said entranceway having an upper boundary, the lower boundary being at an elevation higher than that of the upper boundary, wherein, in the presence of a temperature differential within the entranceway, warmer air is trapped in an upper portion of the entranceway and above the upper boundary.