Thermally broken anchor for lifting a concrete sandwich panel
AssigneeMeadow Burke, LLC
InventorsVenkatesh Seshappa, Darryl Dixon, Michael J. Recker
Life of this patent
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Abstract
A lifting system is provided that prevents a thermal bridge between concrete layers of a precast concrete structure. In some precast concrete panels, an insulation layer is provided between concrete layers. Lifting systems of the present invention allow lifting forces from a hoisting system to be transferred to the concrete panels without creating a thermal bridge between the concrete layers, and thus, reducing the effectiveness of the insulation layer. In some embodiments, a multi-plate configuration allows a central plate to distribute a lifting force to the concrete layers and then rotate away to prevent a thermal bridge between concrete layers.
Claims20
A thermally efficient lifting apparatus for a precast concrete panel, comprising:
- a first wing plate having a first recess, said first wing plate adapted for connection to a first concrete layer of a precast concrete panel;
- a second wing plate having a second recess, said second wing plate adapted for connection to a second concrete layer of said precast concrete panel;
- a central plate having a first extension at least partially disposed in said first recess of said first wing plate, wherein a first lifting edge of said first extension contacts said first wing plate, and said central plate having a second extension at least partially disposed in said second recess of said second wing plate, wherein a second lifting edge of said second extension contacts said second wing plate;
- and
- wherein said lifting edges are configured to transfer a force from said central plate to said wing plates, and wherein said central plate is configured to selectively rotate out of a common plane with said wings plates to disengage said lifting edges from said wing plates.
A thermally efficient lifting system for a precast concrete panel, comprising:
- a precast concrete panel having a first concrete layer, a second concrete layer, and an insulation layer positioned between said concrete layers;
- a first wing plate embedded in said first precast concrete layer;
- a second wing plate embedded in said second precast concrete layer, wherein said first wing plate and said second wing plate are aligned in a common plane;
- and
- a central plate having a first extension at least partially disposed in a first recess of said first wing plate, wherein a first lifting edge of said first extension contacts said first wing plate, and said central plate having a second extension at least partially disposed in a second recess of said second wing plate, wherein a second lifting edge of said second extension contacts said second wing plate, and wherein said central plate is configured to selectively rotate out of said common plate to disengage said lifting edges from said wing plates.
A lifting anchor for a precast concrete panel comprising:
- a body having a composite material, wherein said composite material has a woven layer and a binder layer;
- a first aperture adapted to connect to a first concrete layer of a precast concrete panel;
- a second aperture adapted to connect to a second concrete layer of said precast concrete panel;
- a central aperture adapted to receive a clutch from a hoist system, wherein said central aperture is positioned between said first and second apertures in a horizontal direction of said body;
- and
- at least one winding reinforcement oriented in a vertical direction of said body and aligned with at least one of said first aperture, said second aperture, and said central aperture in said horizontal direction.
Dependencies are inferred from the claim text.