Patent ID: 9574789
Date: 2017-02-21
CPC Classifications: F24F

Claim:
1. A damper comprising: a frame; a first blade pivotally engaged with the frame, the first blade comprising a first end portion, the first blade comprising a hollow portion for receiving an insulating material; a second blade pivotally engaged with the frame, the second blade comprising a second end portion, the second blade comprising a hollow portion for receiving an insulating material; a first seal connected to the first end portion of the first blade; a second seal connected to the second end portion of the second blade; the first seal and the second seal disposed to cooperatively engage an adjacent first blade end portion and second blade end portion such that a dead air space is created between the adjacent first seal and second seal in a damper closed position; and the first thermal gap and the second thermal gap disposed within said dead air space in the damper closed position.