Anchor bolt and annularly grooved expansion sleeve assembly...

F - Mech Eng,Light,Heat,Weapons – 16 – B

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F16B 13/06 (2006.01) G01N 3/32 (2006.01)

Patent

CA 2648309

A wedge-type anchor assembly (110), capable of meeting cracked concrete testing standards, comprises an anchor bolt component (112) and a substantially C-shaped expansion sleeve component (114) annularly disposed about the anchor bolt component. A plurality of annular grooves, threads, or teeth (138) are disposed only about the forward end portion of the expansion sleeve component, as opposed to throughout the entire axial length thereof, so that when the anchor bolt component is moved axially through the expansion sleeve component, the maximum interference area (M. I. A. ) and maximum interference volume (M. I. V. ) can be generated between the anchor bolt component and the expansion sleeve component in a controlled and predictable manner, as well as between the expansion sleeve component and the internal peripheral side wall portions of a concrete substrate or substructure so as to enhance pull-out resistance and reliability of the anchor assembly within the concrete substructure or substrate.

La présente invention concerne un ensemble d'ancrage à coincement, pouvant satisfaire des normes d'essai de béton fissuré, comprenant un boulon d'ancrage et une coquille expansible sensiblement en forme de C disposée de manière annulaire autour du boulon d'ancrage. Une pluralité de rainures annulaires, de filets ou de dents ne sont disposés qu'autour de la section terminale avant de la coquille expansible, et pas sur l'ensemble de sa longueur axiale, de sorte que lorsque le boulon d'ancrage est déplacé axialement dans la coquille expansible, la zone d'interférence maximale (Z. I. M.) et le volume d'interférence maximal (V. I. M.) peuvent être obtenus entre le boulon d'ancrage et la coquille expansible de manière contrôlée et prévisible, de même qu'entre la coquille expansible et les parties de paroi latérale périphérique interne d'un substrat en béton ou d'une fondation afin d'améliorer la résistance à l'arrachage et la fiabilité de l'ensemble d'ancrage intégré à la fondation ou au substrat en béton.

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