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US 4,437,642 AGranted
Lift system for tilt-up walls
AssigneeThe Burke Company
InventorNeil L. Holt
Life of this patent
Estimating the term…
Abstract
A hoisting attachment for a tilt-up wall slab is provided with a remotely operable quick release mechanism which is under the control of the positional attitude of a hoisting cable-attached shackle. An improved assemblage of wall slab insert anchor, support stand for the insert anchor, and a recess former frictionally attached to the upper end of the anchor is also provided.
Claims2
An apparatus for forming a recess about the upper end of an anchor embedded in a concrete slab, said apparatus comprising:
- a body shell of hollow configuration, said shell having a smooth convex side and an open concave side opposite said convex side;
- a receptacle formed in said body and opening through the convex side thereof, said receptacle extending inwardly into a mid-portion of the open concave side whereby voids are provided in said shell to either side of said receptacle, said receptacle being complemental in shape to the upper end of the anchor for receipt of the anchor and frictional engagement therewith, said receptacle having a distal end with shoulders adapted to be seated on the upper end of an anchor received therein and an opening affording visual access to the interior thereof to determined whether or not an anchor received therein is seated;
- and, a top engaged with the body shell to close the open concave side thereof, said top being releasable from the shell to afford access to the opening in the receptacle and the voids to either side of the receptacle.
Dependencies are inferred from the claim text.