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Expanding wall anchor and use for fixing a component to a support material

a technology for supporting materials and expansion walls, which is applied in the direction of fastening means, dowels, mechanical equipment, etc., can solve the problems of product performance decline, product performance drop, and product failure to meet the earlier type testing certification conditions, etc., to reduce the holding performance of wall anchors, improve operation, and improve the effect of performan

Active Publication Date: 2019-08-20
ILLINOIS TOOL WORKS INC
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a new wall anchor design that improves performance under seismic loading in cracked concrete. By increasing the angle between the sleeve and the expansion cone of the body, the anchor is able to withstand higher operating conditions and push back the limits of seizure that can occur between the two surfaces. The use of an antifriction coating is avoided to maintain holding performance. The combination of these parameters results in a stronger and safer wall anchor that can withstand seismic loading while maintaining its maximum safe working load.

Problems solved by technology

This results in increasingly strict product testing conditions.
The known products which were able to meet the earlier type testing certification conditions generally experience a drop in their performance, or even sometimes are no longer able to function at all under seismic loadings.
These changes to the type testing certification conditions, particularly the increase in the width of the cracks in the support material accepting this type of wall anchor during the certification testing, mean that the sleeve has greater difficulty holding fast in the support material, or suitably holding the body of the wall anchor when the latter experiences seismic loadings.

Method used

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  • Expanding wall anchor and use for fixing a component to a support material

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[0057]The description that follows contains a comparative example to illustrate the foregoing.

[0058]We have compared a product according to the invention (product A) that meets all of the requirements stipulated for cracked concrete and seismic loadings against a product of the prior art that meets only the requirements stipulated for cracked concrete without seismic loadings (product B) and against a third product designed exclusively for non-cracked concrete (product C). The three wall anchors compared have the same nominal diameter, in this instance 12 mm (M12), and were set at identical anchoring depths into concretes of identical strengths. The various components of these wall anchors are made of comparable steels commonly used by those skilled in the art. The only appreciable differences are their ratio e / d1 and their angle α as defined above. The reference wall anchor is the wall anchor according to the invention (product A) which works under all the conditions and for which ...

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Abstract

Expanding wall anchor, comprising (i) a threaded longitudinal body formed as a single piece with an expansion cone at one of its ends, this cone being connected to the rest of the body by a cylindrical portion of diameter d1 smaller than the nominal diameter D of the body, and (ii) an expanding sleeve of thickness e mounted around the said cylindrical portion of the body and through which the expansion cone is intended to be moved in order to deform the sleeve and anchor the wall anchor in a hole in a support material, characterized in that the ratio d1 / D is greater than or equal to 60% and the ratio e / d1 is greater than or equal to 22%.

Description

RELATED APPLICATIONS[0001]The present application is a National Phase of International Application Number PCT / US2014 / 052199, filed Aug. 21, 2014, and claims priority to French Application Number 1361072, filed Nov. 13, 2013.TECHNICAL FIELD[0002]The invention relates to an expanding wall anchor and its use for fixing a component to a support material, particularly a support material liable to be subjected to seismic loadings.PRIOR ART[0003]Typically, an expanding wall anchor comprises i) a threaded longitudinal body formed as a single piece with an expansion cone at one of its ends, this cone being connected to the rest of the body by a cylindrical portion of diameter smaller than the nominal diameter of the body, and ii) an expanding sleeve mounted around the said cylindrical portion of the body and through which the expansion cone is intended to be moved in order to deform the sleeve and anchor the wall anchor in a hole in a support material.[0004]Documents US-A1-2010 / 0104393 and W...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F16B13/06
CPCF16B13/065
Inventor POURTIER, FABRICE
Owner ILLINOIS TOOL WORKS INC
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