F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/59
F16L 19/00 (2006.01) F16L 23/00 (2006.01) F16L 23/12 (2006.01) F16L 23/14 (2006.01) F24F 13/02 (2006.01)
Patent
CA 1090273
Abstract of the Disclosure A flange joint unites sections of rectangular sheet-metal duct e.g. in heating or air conditioning systems. The joint has four profiled frame legs having flange surfaces perpendicular to the lateral walls of the duct, and each having an insert channel for the end-edges of one lateral wall of the duct. The channel includes detent means engaging behind projections in the walls of the duct. Four corner angle-pieces serve to join the corners of the frame legs which are closed hollow sections into which the legs of the corner angle-pieces are inserted. The frame legs are roll formed from sheet metal, the hollow section being formed from two walls joined together at their edges remote from the lateral walls of the duct, one of the said walls form- ing the surface of the flange and the other one facing the first. Extensions of these walls at their inner edges are bent at right angles away from the surface of the flange, the bent extensions having layers pressed securely and immovably together at least one extension being folded at least twice, in a meander pattern. The extensions define between them the insert channel to receive the edge of the duct end.
315955
Fetherstonhaugh & Co.
Smitka Gunter
LandOfFree
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