Patent ID: 8414368
Filing Date: 2013-04-09
Classification: F04D,Y10T

Abstract:
1. A damper assembly for a fan, which comprises: a) a first door pivotably mounted adjacent a discharge side of the fan and configured to pivot about a first axis, the first door having a first section and a second section with the first section able to pivot to an open position independent of the second section; and b) a second door pivotably mounted adjacent the discharge side of the fan and configured to pivot about a second axis, the second door having a first section and a second section with the first section able to pivot to an open position independent of the second section, the first and second doors essentially forming a plane in a closed position wherein in the open position, the first section of the first door is at an angle greater than 90° from the closed position of the first door and in an open position, the second section of the first door is at an angle of less than 90° from the closed position of the first door.