Pipes and tubular conduits – Reinforced – With embedded element
Patent
1996-11-12
1999-07-20
Brinson, Patrick F.
Pipes and tubular conduits
Reinforced
With embedded element
138172, 245 2, 245 3, 140107, F16L 5500
Patent
active
059244585
ABSTRACT:
A self locking stirrup mat for providing supplemental support for wire cage concrete reinforcement comprises a stirrup mat formed of a grid of interconnected wires preferably with manually formable tie wires, stirrup elements projecting from the grid, and a self-locking attachment mechanism for attaching the stirrup mat to a wire cage. The self-locking attachment mechanism comprises a plurality of clips fixed at spaced locations on the grid. The clips are shaped and positioned to receive cage wires therein through inlets that are engaged by moving the stirrup mat on the surface of the cage. The clips have one-way inlets that resist removal of the cage wires from the inlets with considerably more force than needed to insert the cage wire into the inlets. In one aspect of the invention, the clips are formed of flat elongated resilient steel loops welded to the tie wires at inclined angles. The clips have inclined elongated internal openings with cam surfaces that draw the stirrup mat securely against a cage when the stirrup mat is slid in a predetermined direction, downwardly on a vertical cage, after the cage wires have been engaged in the clips. In another aspect of the invention resilient clips having one-way inlets are attached to outer ends of the stirrup elements for attachment to a second wire cage. The clips may have enlarged outer loops that serve as spacers.
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