Duct-damper interface adaptor
AssigneePrefco Products, Inc.
InventorFrancis J. McCabe
Life of this patent
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Abstract
The present invention relates to slip joints for use with dampers, ducts, and mounting surfaces, as for example, fire dampers which are to be mounted through walls or other fire proof partitions and which are to have ducts mounted thereto. A novel duct-damper interface adaptor is disclosed which is constructed entirely from integral sheet material and which is slipped onto the inwardly depending flanges of a damper during the assembly of that damper. The damper adaptor unit is then ready to receive a complementally formed duct which is slidingly fitted thereon. This embodiment provides adaptors which are inexpensive, easy to manufacture, readily installable at the job site and provide superior advantage to the final damper-duct installation.
Claims12
A duct-damper interface adaptor for use in interconnecting a multi-sided damper frame having a plurality of inwardly depending, coplanar, radial flanges, one for each side of said damper frame, with a complimental, multi-sided duct, said adaptor comprising:
- (a) a plurality of integral duct-damper interface connectors, one for each complimental side and flange of said duct and damper frame to be interconnected, each connector comprising:
- (i) duct engagement means for slidingly engaging said sides of said duct to be interconnected, and
- (ii) damper frame engagement means connected to said duct engagement means for slidingly engaging the complimental flange of said damper frame to be interconnected, portions of said damper frame engagement means extending longitudinally beyond the terminating ends of the innermost edge of said flange and being configured to engage similar portions of other of said connectors engaging other adjacent flanges of said damper frame to cooperate therewith and prevent substantial movement of said connectors with respect to said flanges.
Dependencies are inferred from the claim text.