Fitting for insulated duct

Details Fitting for insulated duct Fitting for insulated duct

1976-01-16

1977-03-01

Callaghan, Thomas F.

Pipe joints or couplings

Elbow

Sheet metal

285189, 285424, F16L 4100

Patent

active

040098940

ABSTRACT:
Disclosed is a fitting having an attachment configuration for end-to-panel securing of the fitting to an insulated duct. The fitting is provided with a standing flange spaced from the end margin of the fitting a distance substantially equal to the thickness of the insulated duct wall adjacent the opening therein and limiting the depth of insertion of the fitting into the opening. An outwardly extending tab or flange is located on one portion of the end margin of the fitting and is adapted to back the adjacent duct wall. A separate member, L-shaped in cross-section, is attached to an opposite portion of the end wall margin after insertion of the fitting, one leg of the L-shaped member backing the adjacent duct wall.

REFERENCES:
patent: 2498753 (1950-02-01), Deitsch
patent: 2874980 (1959-02-01), Browning
patent: 2950131 (1960-08-01), Hennen
patent: 2963783 (1960-12-01), Field
patent: 2965397 (1960-12-01), Vanden Berg
patent: 3479073 (1969-11-01), Collins
patent: 3482861 (1969-12-01), Keating
patent: 3727663 (1973-04-01), McCabe

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