Title:
FLANGE CONNECTING PORTION
Document Type and Number:
Japanese Patent JPS5475619
Kind Code:
A
Abstract:
A joint assembly for the end of a prismatic duct comprises a frame including a plurality of elongate L-section profiles each formed unitarily of sheet metal with a pair of legs the first of which parallels a corresponding duct sidewall and forms one of two jaws which define a slot receiving that sidewall, the second leg being hollow and forming an open-ended transverse channel accommodating angularly or curvilinearly profiled sheet-metal arms of associated corner pieces. The channel is bounded by two generally parallel walls either or each of which has an extension forming part of the other jaw of the slot. The free edge of at least the second leg forms a bent-over two-ply stiffening rib which could be engaged by a connecting clip. Barb-like formations on either or both slot-forming jaws and on the sidewall bracketed thereby engage each other to lock the frame onto the duct. The corner pieces have holes enabling the frame to be bolted or riveted to a similar frame of an adjoining duct, or to some other support.
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Inventors:
GIYUNTERU SUMITOKA
Application Number:
JP13686678A
Publication Date:
June 16, 1979
Filing Date:
November 08, 1978
Export Citation:
Assignee:
SMITKA INVENT GMBH
International Classes:
F16L23/12; F16L23/02; F16L23/14; F24F13/02; (IPC1-7): F16L23/00