Butt connection between two air duct sections made sheet of meta

Details Butt connection between two air duct sections made sheet of meta Butt connection between two air duct sections made sheet of meta

1991-02-19

1992-07-28

Arola, Dave W.

Pipe joints or couplings

Packed

Flanged pipe

285424, F16L 23032

Patent

active

051335808

ABSTRACT:
A butt connection between two air duct sections made of sheet metal has two flange frames fastened to opposed ends of two duct sections. Each flange frame is L-shaped in radial section, having an outer radially extending flange leg and an inner flange leg in a duct section, each flange frame comprising a hollow into which a leg of an L-shaped intermediate connection is fitted. Each flange frame is connected to the other flange frame, as by bolts, etc. The butt connection is equally applicable to duct sections which are of round, flattened oval, and rectangular cross sections, with the same flange frame shapes and essentially the same intermediate connector being usable.

REFERENCES:
patent: 565499 (1896-08-01), Pattison
patent: 574743 (1897-01-01), Mallen
patent: 2703109 (1955-03-01), Saville
patent: 4537425 (1985-08-01), Press et al.
patent: 4542923 (1985-09-01), La Crosse et al.
patent: 5015018 (1991-05-01), Arnoldt

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