F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
285/60
F16L 23/00 (2006.01) F16L 23/14 (2006.01)
Patent
CA 1090388
ABSTRACT OF THE DISCLOSURE A joint assembly for connecting the ends of a pair of generally rectangular sheet metal duct sections includes a pair of frame members secured to each other and connected to the respective duct end portions. The frame members each have four flange portions with an upstanding channel shaped leg and an angularly extending duct receiving leg. Four angular corner pieces extend into the adjacent channel portion of the up- standing legs to form the generally rectangular frame. The end portions of the ducts are positioned in longitudinal openings in the duct receiving leg and are rigidly secured thereto by spot welding or the like. The frame members con- nected to the ducts are secured to each other by bolts or the like extending through adjacent corner pieces to rigidly connect the ends of adjacent duct sections. The upstanding channel shaped leg of the angle flange portion has an inturned rebent portion that forms a longitudinal pocket between the rebent portion and the lower wall of the duct receiving leg. A longitudinally extending gasket is positioned in the pocket in sealing relation with the end of the duct wall. The corner pieces have angularly extending legs with longitudinal con- cave recessed portions therein that exert a force along the transverse dimension of the legs and prevent the inturned rebent portion from bending away from the duct end wall. The angular corner pieces are parallel to and angularly displaced from a section of the angular corner piece body portion to per- mit surfaces of the body portion of adjacent corner pieces to abut while the leg portions which extend into the channel por- tion of the frame are parallel and are spaced from each other approximately the thickness of the outer walls of the adjacent abutting flange portions.
308821
Ductmate Industries Inc.
Macrae & Co.
LandOfFree
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