Tubular duct member
AssigneeWalsh Intellectual Property Ltd.
InventorsBrian Rowan, Patrick Walsh
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Abstract
A tubular duct member comprises a plurality of sheet metal panels 10, 12 joined along adjacent longitudinal edges by cooperating folded sheet metal catches 14, 16, the catches being pushed together such that respective detent surfaces 28, 30 on each catch engage behind one another to retain the edges of the sheets together. One of the catches 14 includes a body 36 of resilient material compressed between the catches and biasing the catches apart to maintain the detent surfaces 28, 30 bearing against one another.
Claims10
A tubular duct member comprising a plurality of circumferential sheet material panels joined along adjacent longitudinal edges by cooperating sheet material catches formed along each edge, the catches being pushed together such that respective detent surfaces on each catch engage behind one another to retain the edges of the sheets together, wherein at least one of the catches includes a body of resilient material compressed between the catches and biasing the catches apart to maintain the detent surfaces bearing against one another, wherein each catch comprises a rib of triangular cross-section extending along the respective edge, the detent surfaces being surfaces of said ribs.
Dependencies are inferred from the claim text.