Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Separately attached head
Patent
1991-05-13
1993-11-30
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Separately attached head
411384, 411451, 411531, 52410, 52512, F16B 1502, F16B 1508, E04B 500
Patent
active
052659984
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a fastening element for the mounting of insulating strips and/or plates on a solid substructure with a large surface washer and a tube-shaped extension, for the penetration, the guidance, and the mounting of a fastener, which penetrates into the solid substructure.
Such fastening elements are utilized for the mounting of insulating materials on solid backing, as for example for the mounting of insulating plates on roofs. If materials must be transported onto the roof, it can happen that, for example, a worker steps onto a washer or in its close vicinity, or that a vehicle or tool is moved over the washer. Such locally limited forces can cause the free end of the fastener to penetrate through the applied insulation material, or that the washer penetrates the roof shingles, which are attached to the insulation material. Another variation has been suggested, in which a tube-shaped extension is arranged on the relatively large-surface washer, into which a screw is inserted. The head of this screw lies in this case within the tube-shaped extension and is recessed relatively deeply compared to the upper side of the washer, in which the necessary length of the screw is shortened considerably. The thickness of the insulation material can become a negligible factor because of the interaction between the length of the tube-shaped extension and the length of the screw. In connection with this, it already has been suggested to produce the washer and the tube-shaped extension from two separate parts. In both known variations, the possibility exists that the fastening element can be shortened in a telescoping manner during application of the corresponding load, which means, for example, if a person steps on the washer.
One disadvantage in those known variations is that a number of fasteners with different lengths, which usually means the length of the screws, is necessary depending on the thickness of the insulating strips and/plates and especially with different thicknesses of the insulating strips on the roof. This is necessary because the head of the screw must adjoin the base of the inner space of the tube-shaped extension and the tube-shaped extension and the washer must be pressed against the upper side of the insulating strip. If it does not matter how far such a screw is inserted into the solid substructure, this becomes a negligible factor. If the solid substructure consists, for example, of concrete plates or wood with a visible sheeting, these screws cannot be inserted too deeply into the solid substructure.
SUMMARY OF THE INVENTION
The invention is based on the task of creating a fastening element with which a relatively large application range in regard to the thickness of the insulating strips is made possible and a subsequent adjustment possibility is created in which the telescoping movement between the fastener and the tube-shaped extension can be executed.
According to the invention, this is obtained by the fact that the distance which is formed by the tube-shaped extension and the section of the fastener that protrudes over the same is adjustable by a nonpositive and/or positive adjustable connection between the fastener and a lock element, which is attached on the end that protrudes into its extension, between the fastener and the tube-shaped extension, or between sections of a multisectioned extension.
These measures, according to the invention, assure that the utilized fastening elements can be adjusted to the thickness of the mounted insulating strips and/or plates, and that a subsequent adjustment can be executed if the insulating strip is settling, and that the necessary telescoping movement between the fastener and the tube-shaped extension can still be executed. It is also possible, depending on the structure of the fastening element, to let the fastener penetrate into the tube-shaped extension to a higher or lesser extent and to lengthen or shorten the tube-shaped extension, in which it is always ensured that the washer is still pressed o
REFERENCES:
patent: 4452023 (1984-06-01), Stahlberg
patent: 4881861 (1989-11-01), Hewison
patent: 4909691 (1990-03-01), Bogel
patent: 5122022 (1992-06-01), Kluser
SFS Stadler Holding AG
Wilson Neill R.
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