Apparatus for connecting a branch duct to another duct

Details Apparatus for connecting a branch duct to another duct Apparatus for connecting a branch duct to another duct

1990-12-10

1992-01-14

Nicholson, Eric K.

Pipe joints or couplings

Flexible joint, rigid members

Bellows

285424, 285189, F16L 5102

Patent

active

050804030

ABSTRACT:
Apparatus for readily connecting a round branch duct take off fitting of a forced air heating or air conditioning system to any size diameter round duct main with one size semi-flexible duct take off fitting. A hole is cut into the main round duct. The take off fitting is rigidly fastened at the contact tangent point of the main duct and the flat surface of the fitting. A bendable base flange, that is connected to a semi-flexible tubular member, is then formed around the main round duct and is fastened to same. As the bendable base flange is formed the semi-flexible fabric portion deforms to accommodate any size diameter main duct. Gaskets between connecting surfaces prevent air leakage.

REFERENCES:
patent: 1197496 (1916-09-01), Jobling
patent: 1586706 (1926-06-01), Russell
patent: 2352038 (1944-06-01), Tolke
patent: 2632658 (1953-03-01), Mertz
patent: 3811714 (1974-05-01), Pintard
patent: 4283078 (1981-08-01), Ross et al.

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