Sealed knock-down duct collar

Details Sealed knock-down duct collar Sealed knock-down duct collar

1993-09-15

1995-02-28

Nicholson, Eric K.

Pipe joints or couplings

Connector for conduit housing electromagnetic line:

Having box and connector

285424, F16L 4102

Patent

active

053931068

ABSTRACT:
A completely sealed knock-down collar for joining heating and cooling ducts to plenums. The knock-down collar is formed from an elongate sheet metal strip punched with a plurality of tabs along one edge, a plurality of diagonal slits spaced from the tabs, a target on one end and a slot on the other. The sheet metal strip is rolled into a tubular shape with diagonal slits forming a herringbone mounting flange and the tongue fitting the slot to lock the strip in the tubular shape. A non-drying sealer is provided beneath the herringbone mounting flange and along one end to seal the collar when mounted in a plenum.

REFERENCES:
patent: 2224208 (1940-12-01), Acer
patent: 2963783 (1960-12-01), Field
patent: 4009895 (1977-03-01), Koskolois
patent: 4147382 (1979-04-01), Wachter
patent: 4249758 (1981-02-01), Harris
patent: 4294476 (1981-10-01), Nash
patent: 4491124 (1985-01-01), Goettel
patent: 4620729 (1986-11-01), Kauffman
patent: 4930815 (1990-06-01), Tuggler, Jr.

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