Patent ID: 8881766
Filing Date: 2014-11-11
Classification: F16K,F16L,Y10T

Abstract:
1. A damper assembly for removing particulate material from an industrial duct having a bottom wall receiving the particulate material, comprising: a frame surrounding an opening in said bottom wall having a periphery; a vertical articulating member movable axially between an upper closed position and a lower open position; first and second blades each having an outer distal edge defining one half of said periphery of said opening when said vertical articulating member is in said closed position, and proximal adjacent edges; said blades each pivotally supported on said frame adjacent to but spaced from said proximal edges for balancing particulate material disposed on said blades; a pair of links each having one end pivotally supported on said articulating member and an opposed end pivotally attached to said blades at a mid-portion of said blades; and said blades supporting the particulate material on the bottom wall of the duct when said vertical articulating member is in said upper closed position with the links in compression, and said blades rotating to an open position when said articulating member moves to said lower open position with said links remaining in compression to rigidly support said blades.