Patent ID: 9127854
Filing Date: 2015-09-08
Classification: F24F

Abstract:
1. A damper comprising: a housing having an upper wall, a lower wall, a first sidewall, and a second sidewall, wherein the upper wall is spaced apart from and generally faces the lower wall, wherein the first sidewall is spaced apart from and generally faces the second sidewall, wherein the upper and lower walls are connected to the first and second sidewalls, wherein the upper and lower walls and the first and second sidewalls cooperate to define an air passage therethrough, and wherein the upper and lower walls include a channel; and a damper vane positioned in the air passage and rotatably connected to the housing, wherein the vane includes a central axis about which the vane rotates, wherein the vane includes outer edges spaced apart from and on opposite sides of the central axis, wherein the central axis is aligned with the channels in the upper and lower walls, wherein the upper and lower walls are space apart a first distance, wherein the channels are spaced apart a second distance, wherein the outer edges are space apart a third distance, wherein the first distance is less than the third distance, and wherein the second distance is greater than the third distance, whereby the outer edges of the vane are received in the channels when the vane is in a closed position.