Frameless retrofit damper

A damper configured for placement within a ductwork system, the ductwork system including a duct that supplies conditioned air through a register boot to a register vent within a room of a building, the damper comprising:

• a damper body;
• a threaded rod extending upstream from the damper body and operably coupled to a drive motor secured to the damper body, the threaded rod configured to rotate in response to the drive motor being actuated;
• a nut threadedly engaged with the threaded rod;
• a first damper blade segment pivotally secured to the damper body and extending upstream from the damper body, the first damper blade segment including a first linking segment extending between the first damper blade segment and the nut;
• a second damper blade segment pivotally secured to the damper body and extending upstream from the damper body, the second damper blade segment including a second linking segment extending between the second damper blade segment and the nut;
• a resilient seal extending radially outwardly from the first damper blade segment and the second damper blade segment, the resilient seal having a shape that facilitates the resilient seal to seal against an interior of the duct;
• and
• wherein the first linking segment and the second linking segment constrain the nut against rotation such that rotation of the threaded rod causes the nut to translate along the threaded rod, and translation of the nut in a first direction causes the first damper blade segment and the second damper blade segment to pivot closer together while translation of the nut in a second direction causes the first damper blade segment and the second damper blade segment to pivot farther apart.

A damper configured for placement within a ductwork system, the ductwork system including a duct that supplies conditioned air through a register boot to a register vent within a room of a building, the retrofit damper comprising:

• a damper body;
• a damper blade pivotally secured relative to the damper body, the damper blade including a rigid structure and a resilient seal extending radially outwardly from the rigid structure, the damper blade being pivotally movable between a first position in which air flow is restricted from flowing past the damper blade and a second position in which air flow is less restricted from flowing past the damper blade;
• and
• a drive motor secured relative to the damper body and configured to move the damper blade between the first position and the second position.