Pipe joints or couplings – Packed – Flanged pipe
Patent
1979-10-03
1981-09-08
Callaghan, Thomas F.
Pipe joints or couplings
Packed
Flanged pipe
285424, F16L 2300
Patent
active
042881153
ABSTRACT:
A means for connecting together sheet metal ducts, e.g. forced air heating ducts, in end-to-end relationship, comprises hollow, roll formed flange members which extend along the edges of adjacent duct ends, and L-shaped corner pieces the limbs of which can be inserted into the ends of the flange members to complete the joint at the corners. A sealing agent or gasket is located between sets of flange members and corner pieces. The flange members have planar side end surfaces for sealing reception of the gasket, and lower protuberances, into which the ends of the metal ducts fit, the protuberances being arranged to bite into the gasket to improve the seal. The corner pieces have laterally offset portions, allowing the raw edge of the duct, at the corners, to project forwardly of the side surface of the corner piece, and hence to bite into the gasket at the corners to improve the seal. Channel shaped cleats are provided to assist in the attachment of pairs of profiles on adjacent end arranged ducts. Bolt holes are provided through the corner pieces for the primary attachment means.
REFERENCES:
patent: 939001 (1909-11-01), Forster
patent: 1035810 (1912-08-01), Osborne
patent: 1812319 (1931-06-01), Brumfield
patent: 3923326 (1975-12-01), Mez
patent: 4094520 (1978-06-01), Ng et al.
patent: 4123094 (1978-10-01), Smitka
patent: 4218079 (1980-08-01), Arnoldt
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