Transverse joint system for sheet metal ducts

Details Transverse joint system for sheet metal ducts Transverse joint system for sheet metal ducts

1983-03-23

1984-07-24

Callaghan, Thomas F.

Pipe joints or couplings

Packed

Flanged pipe

285424, F16L 2300

Patent

active

044614993

ABSTRACT:
Abutting sections of sheet metal ducts are joined at an interface by flanging the ends of each section adjacent the interface and forming a plurality of spaced tabs in the wall surface of the flanges, which tabs protrude outwardly in a direction away from the interface. A generally V-shaped coupling member, having a portion of the free edges thereof folded back under the corresponding side wall, is then assembled over a pair of opposed flanges with the edges of the folded under portions snapping in behind the tabs to lock the flanges together.

REFERENCES:
patent: 2627430 (1953-02-01), Koffler
patent: 3154330 (1964-10-01), Clark et al.
patent: 3428342 (1969-02-01), Chambers
patent: 3460859 (1969-08-01), Keating
patent: 3630549 (1971-12-01), Grimm
patent: 3791681 (1974-02-01), Moldow

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