E - Fixed Constructions – 04 – G
Patent
E - Fixed Constructions
04
G
E04G 7/30 (2006.01) E04G 7/32 (2006.01)
Patent
CA 2153574
A releasable joint connects an upright (10) and a transverse brace (16) in an aluminum scaffold frame. A horizontal aluminum flange (12) is attached to the upright (10) and an aluminum connector (18) to the brace (16). The connector (18) has a mouth (50) which receives the flange (12). A steel wedge (20) is inserted through a vertical passage (52) in the connector (18) and an opening (28) in the flange (12). The opening (28) contains a vertical, planar wedge-seating surface (36) of uniform horizontal cross section. The connector (18) contains a pair of parallel, planar wedge- seating surfaces (54, 56), one above and one below the flange (12). These surfaces (54, 56) extend downwardly and radially outwardly relative to the upright (10) at a predetermined angle relative to vertical and have uniform horizontal cross sections. The wedge (20) has a vertical edge surface (64) that mates with the wedge-seating surface (36) in the opening (28) and a pair of edge surfaces (66, 68) inclined at the predetermined angle and mated with the wedge-seating surfaces (54, 56) in the connector (18). The various mated surfaces slide relative to one another as the wedge (20) is forcefully inserted or released from the joint, reducing wear. The wedge (20) also forces the connector (18) downwardly against the flange (12), during wedge (20) insertion, ensuring that the joint is reliably locked.
Lubinski Ronald
Mccarthy Tetrault Llp
LandOfFree
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