Patent ID: 11957942
Assignee: JUSTRITE MANUFACTURING COMPANY, L.L.C.
Field: Civil engineering (Other fields)
Classification: CPC A  F  B  E | IPC A  B  E  F

Claim 10:
11. The damper of claim 10, wherein the interior surface of the body includes a first projection and a second projection, the first and second projections extending radially inwardly toward each other, and the valve plate being in contacting engagement with the first projection and the second projection when the valve plate is in the closed position, the valve support assembly being adapted to support the valve plate such that the valve plate is rotatably movable about a pivot axis between the open position and the closed position, the valve plate rotating about the pivot axis in a closing direction when moving from the open position to the closed position, the first projection includes a first valve seat surface extending radially inwardly and facing the second end of the body, and the second projection includes a second valve seat surface extending radially inwardly and facing the first end of the body, wherein the valve plate includes a first face and a second face in opposing relationship to the first face, the first and second valve seat surfaces being configured to interferingly engage the first and second faces of the valve plate, respectively, when the valve plate is in the closed position to prevent the valve plate from rotating from the open position further about the pivot axis in the closing direction.