Static structures (e.g. – buildings) – Frangible section or means
Patent
1982-04-26
1984-05-01
Raduazo, Henry E.
Static structures (e.g., buildings)
Frangible section or means
52699, 52704, E04C 100
Patent
active
044453035
ABSTRACT:
A concrete insert suitable to provide an anchor in a concrete slab is disclosed. This insert provides an especially suitable anchor for hanging objects from a poured concrete floor in multi-story construction. The concrete insert comprises a plurality of anchoring surfaces suitable for engaging the concrete slab, a coupling means suitable for coupling an object to the insert anchor and means for increasing the engaging force exerted by the anchoring surfaces when an increased force is applied by the anchored object through the coupling means. The concrete insert anchor most preferably employs a curved distorting surface adjacent and convex to one end of the anchoring surfaces. Force applied to this distorting surface through the coupling means exerts an outward force at its ends, thus forcing the adjacent ends of the anchoring surfaces into stronger engagement with the surrounding concrete and increasing the engaging force exerted thereon.
REFERENCES:
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patent: 1621877 (1927-03-01), Fitz Gerald
patent: 1670443 (1928-05-01), Fishel et al.
patent: 2135118 (1938-11-01), Stewart
patent: 2176450 (1939-10-01), Barnett
patent: 3005292 (1961-10-01), Reiland
patent: 3157966 (1964-11-01), Sherburne
patent: 3479785 (1969-11-01), Asch
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