F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
98/16
F24F 7/04 (2006.01) F16L 23/14 (2006.01)
Patent
CA 1238811
ABSTRACT OF THE DISCLOSURE FL?NGE CONNECTION In the case of a flange connection for rectangular air conditioning ducts which have four walls, four flange profiles with four rectan- gular angle-pieces are fitted frame-wise on the end of a duct portion. The flange profiles are in this case substantially L-shaped hollow profiles which are in each case fitted onto a duct wall and fixed there with a plurality of spot welds. Problematical is the seal between the inner arm of the flange profile and the duct wall, because by reason of spot welds which are situated close to but at a distance from one another, air can flow out into the free atmosphere between them and over the end face of the duct wall. In order to achieve better tightness, there is according to Fig. 2 formed into the hollow profile a bead 29 extending from the front radial portion 19. An inner arc 33 of the bead 29 lies with a clamping fit on the top of the duct wall 11 and presses it against the inner longitudinal arm 17 so achieving a seal which it is possible easily to implement in manufac- ture. The arc 33 and the arc 36 which merges into the inner longitu- dinal arm 17 have relatively large radii, so that manufacturing the profile on a profile rolling plant presents no difficulties. Application: to the manufacture of prefabricated partial ducts for rapidly assembling air conditioning ducts, for purposes of ventilation, heating or cooling large projects.
451514
Mez Georg
Moffat & Co.
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