Apparatus for connecting a branch duct to another duct
OwnerJohn A. Paoluccioinventor
Life of this patent
Estimating the term…
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.
Claims22
Apparatus for joining a circular cross-section duct to an associated main duct which comprises:
- a bellows including a bendable generally planar first ring member manufactured of a first material, second and third generally planar ring members manufactured of a second material, said second material being more flexible than said first material, and a fourth generally planar ring member manufactured of a third material, said third material being more rigid than said first material, said first, second, third and fourth ring members being successively joined together to form said bellows.
Apparatus for joining a duct to a main duct which comprises:
- a bellows including a bendable generally planar first ring member manufactured of a first material, second and third generally planar ring members molded as one piece a second material, said second material being more flexible than said first material, and a fourth generally planar ring shaped member manufactured of a third material, said third material being more rigid than said first material, said first, second, third and fourth ring members being successively joined together to form said bellows.
Apparatus for joining a rectangular duct to a round main duct which comprises:
- first, second, third and fourth generally planar substantially rigid members which are respectively at least portions of respectively first, second, third, and fourth walls of a generally rectangular cross section duct, said first and second walls each including a more flexible section, said first and second planar members being disposed in opposed spaced relationship, said third and fourth planar members being disposed in opposed spaced relationship, said fitting including bendable flanges extending from said more flexible sections of said first and second walls and also from said third and fourth walls adjacent to said flanges on said first and second walls.
Dependencies are inferred from the claim text.