Pipe joints or couplings – Molded joint – Interlocked
Patent
1980-09-19
1982-05-11
Arola, Dave W.
Pipe joints or couplings
Molded joint
Interlocked
285405, 285424, 138160, 413 2, F16L 1302
Patent
active
043289819
ABSTRACT:
A sheet metal duct section component including at least one pair of adjacent longitudinally extending integral panel portions relatively angulated about a longitudinal zone connecting adjacent longitudinal marginal portions of said panel portions. At least one pair of corresponding ends of the panel portions include individually bendable flanges extending endwise outwardly therefrom. The flanges are bent relative to and toward corresponding sides of the panel portions into generally coplanar relation and include outer end extremities bent backwardly over the flanges to define double thickness flanges. A filler plate of a thickness at least generally equal to the double thickness flanges and including an outside corner defined by adjacent relatively angulated marginal edges of the filler plate is provided and substantially conforms to the inside corner defined by the adjacent marginal portions of the double thickness flanges. The outside corner of the filler plate is positioned and secured, by welding, in the aforementioned inside corner with the filler plate substantially coplanar with the double thickness flanges. The double thickness flanges and the filler plate define a duct section end mounting flange assembly for end abutting of the duct section against and securement to a second transverse duct section wall, the double thickness flanges and the filler plate having mounting apertures formed therethrough.
REFERENCES:
patent: 682026 (1901-09-01), Bungeroth
patent: 1416334 (1922-05-01), Connery
patent: 2147431 (1939-02-01), Ewing
patent: 3782763 (1974-01-01), Henrickson
patent: 4040449 (1977-08-01), Butler
patent: 4215518 (1980-08-01), Blair
Greene, III Carl B.
Greene, Jr. Carl B.
Arola Dave W.
Jacobson Harvey B.
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