Supports – Suspended supports
Patent
1981-06-10
1984-04-24
Britts, Ramon S.
Supports
Suspended supports
248327, 248343, 411 15, A47H 110
Patent
active
044443722
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE PRESENT INVENTION
The present invention relates to a tensile force absorbing anchoring in concrete or another hard material, comprising an anchoring member and a hole in the material for receiving said member.
For anchoring a structure in concrete, such as a ceiling suspended from a concrete joist, plugs and/or expanding members are used which are entered into holes sunk into the concrete and which are tightened in the holes with the aid of screw or bolt means. Whether plugs or expanding members are employed, the anchoring in concrete is difficult and time-consuming and costly, as well, not the least by reason of the holes required for these known anchoring members having to be comparatively deep for affording the necessary strength, and of such depth, as a rule, that the reinforcements below the concrete surface are often encountered on sinking the holes. This considerably delays and makes costlier the sinking of the holes to a depth required for proper strength, or may entail breaking off the preparing of the holes before reaching the necessary depth, thereby causing the anchoring strength to be insufficient.
It is an object of the present invention, therefore, to provide a concrete anchoring free from the afore mentioned drawbacks and being such that it does not require any screw or bolt means for its securing or clamping in a hole, thus making for a quicker mounting than when known plugs or expanding members are used, which further requires only a considerably lesser depth of hole than the known anchoring members and in spite of this affords a strength which is improved over that attained with known anchoring means of the plug or expanding-member type, and which can be mounted quickly and in a simple manner. To a speedy mounting an important contribution is offered therethrough that the depth of the anchoring hole may be reduced considerably when practising the invention.
These objects and others are attained by providing a structure according to the present invention the characteristics defined in the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the present invention are described hereinafter, reference being had to the drawing. In the drawing:
FIG. 1 is a perspective view of an anchoring member according to the invention,
FIG. 2 is a section view of an anchoring member received in an anchoring hole sunk into a concrete joist,
FIG. 3 is a perspective view of a modified embodiment of the anchoring member and,
FIG. 4 is a section view of a further embodiment according to the present invention received in an anchoring hole.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the drawing an anchoring member 1 is shaped integrally of resilient steel wire, such as music-wire (pianosteel wire) or the like, and includes an anchoring portion 2 and a leg portion 3. This leg portion 3 is shaped as a substantially U-shaped fastening eye or loop and comprises more specifically two shanks 5 connected by an arcuate portion 4, whereas the anchoring portion 2 comprises two opposed gripping members 6 formed integrally with an associated shank 5 by being bent inward towards the shank. The gripping members 6 subtend an angle with the associated shank 5 which should be less than 90.degree. and should be in the range 20.degree.-70.degree., preferably 29.degree.-61.degree., and being about 45.degree. in the preferred embodiment illustrated in the drawing. Further, in the illustrated embodiment gripping members 6 having their free ends 7 pointing in opposite directions are overlapping in planes which are substantially parallel with the leg portion (the drawing plane in FIG. 2) and cross each other. In a further embodiment (FIG. 4), the gripping members 6 are staggered vertically. This entails the drawback of having to provide deeper holes for anchoring the member, however.
In FIG. 2 an anchoring member according to the invention is shown introduced into an anchoring hole 9 sunk into a concrete surface 8 from below. This anchoring hole should have a diameter, accordi
REFERENCES:
patent: 1172350 (1916-02-01), Freer
patent: 1733083 (1929-10-01), Pleister
patent: 2878668 (1959-03-01), Starling et al.
patent: 3530545 (1970-09-01), Lengyel
Berggren Artur E.
Klingstedt Holger E.
Klingstedt Ingvar
Britts Ramon S.
Miljotakmontage AB
Ramirez Ramon O.
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