Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc.
Patent
1984-05-07
1986-12-09
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
411457, 411461, 411469, 411477, 52713, F16B 1500
Patent
active
046277773
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an attachment means, especially for decorative borders.
Attachment means made of sheet metal are known through the U.S. Pat. Nos. 2,386,887 and 4,167,885, having more or less the same properties and field of application as conventional wire nails.
A disadvantage with such known attachment means is that they leave marks behind and that the attachment is not acceptable if one tries to use the existing nail holes. A conventionally nailed border can therefore usually not be re-used but must be replaced with a new one. This can cause problems; partly it can be hard to reproduce a border of a certain profile, partly the new border is often not of the same shade and perhaps not of the same patina as the old border.
Another disadvantage is that considerable professional skill is demanded to install a decorative border, especially if the undersurface is concrete.
SUMMARY OF THE INVENTION
The object of the present invention is to achieve an attachment means which can be massproduced at low cost, permits re-usage of decorative borders etc., is easy to use also for amateur carpenters and further allows adjusting before the final attachment.
According to the present invention the attachment means consists of at least two identical nail-like parts, each including an elongated section having a first portion with substantially parallel long sides and a second portion which tapers toward a first end. The elongated section is bent at the center between the parallel sides to form a V-shaped cross-section and is provided with a slot which coincides with the longitudinal bend.
A head member comprising two trapezoidal-shaped head parts, each head part having shorter and longer parallel sides, is attached to the elongated section at right angles thereto and along the parallel sides. The combined length of the long parallel sides is greater than the width of the elongated section and the head member extends outwardly from the elongated section in a direction opposite to the apex of the V-shaped bend. The shape of the bend, the width of the slot and the width of the elongated section are selected to permit insertion of one nail-like part into the slot of another nail-like part with a friction fit.
According to a preferred embodiment of the invention, the edge lines of the notch form a V so that the parts narrow towards the shorter of the parallel sides of the trapezoidal shaped head part, which contributes to the parts penetrating the material of the border.
According to another preferred embodiment the parts are equipped with barbs to improve attachment and to achieve improved fixation of the parts in relation to each other when a combination of two nail-like parts is used.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following discussion the invention will be explained referring to the enclosed drawings where
FIGS. 1a and 1b show an embodiment of an attachment means according to the invention from two opposite directions, consisting of two identical nail-like parts.
FIGS. 2a and 2b show one such nail-like part from one side and from the opposite respectively.
FIG. 3 shows a hidden installation of ceiling or floor border using an attachment means according to the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An attachment means according to the invention consists of at least two identical nail-like parts A and B, see FIG. 1. Each nail-like part includes an elongated section 1 having mutually, approximately parallel long sides 2, 3. One end 4 of the section 1 narrows gradually to form the point of the nail-like part. The head, in the other end 5 of the section 1, is bent to create a right angle to the elongated section and is divided into two trapezoidal shaped head parts, 5a and 5b, by a notch 6, the main direction of which is parallel with long sides 2, 3. The head has a width which is larger than the width of the elongated section 1 and is mainly trapezoidal in shape where the longer 8 of the parallel sides of the trapezoidal shaped head parts symmetricall
REFERENCES:
patent: 941877 (1909-11-01), Hosch
patent: 991589 (1911-05-01), Wright
patent: 1087580 (1914-02-01), Hamill
patent: 2110959 (1938-03-01), Lombard
patent: 2386887 (1945-10-01), Eckel
patent: 2940712 (1960-06-01), Lloyd-Young
patent: 4001993 (1977-01-01), Daniels
patent: 4167885 (1979-09-01), Paskert et al.
Lindsey Rodney M.
Smith Gary L.
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