Static structures (e.g. – buildings) – Module or panel having discrete edgewise or face-to-face...
Patent
1998-03-04
1999-09-14
Friedman, Carl D.
Static structures (e.g., buildings)
Module or panel having discrete edgewise or face-to-face...
525921, 525902, 525861, E04B 500
Patent
active
059503882
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/NO96/00130 filed on May 28, 1996.
The present application relates to a plate for flooring which easily may be laid out and taken up, e.g. for temporary covering of artificial grass indoors in gymnasiums, said plate having rectangular form and comprising longitudinal edges having upper lips and lower lips.
Such plates, which e.g. may have a size of 1, 5.times.3 m, are often laid out in bond and are connected to the adjacent plates at their short and longitudinal edges, e.g. by means of a tongue and groove principle and/or more or less loose pins arranged in bores in the edge surfaces. It is also known to use external fittings in order to keep the plates in place with respect to each other. DE 38 26 307 shows examples of different ways of interconnecting the plates.
Common to the prior art solutions is that they are not able to combine the possibility of permitting quick and exact laying out and a resulting steady and stable floor where the joints do not form cracks and stumbling edges, particularly when the plates are subject to point loading of some magnitude.
The object of the present invention is to improve this situation. This is obtained according to the invention by a plate of the type mentioned in the introductory paragraph, which is characterized in that the upper and lower lips are arranged sectionwise such that the longitudinal edges generally exhibit an upper lip on a section where there is no lower lip, and vice versa, and that on the or those sections where one longitudinal edge exhibits an upper lip, the other longitudinal edge has a lower lip, and vice versa.
Further advantageous features of the invention are recited in the dependent claims.
For better understanding of the invention it will be described more closely with reference to the exemplifying embodiments shown in the appendant drawings, where:
FIG. 1 is a schematic plan view of a floor, provided with plates according to the invention,
FIG. 2 is an elevation of a single plate used in the floor in FIG. 1,
FIG. 3 is an edge view, seen in the direction of the arrow III in FIG. 2,
FIG. 4 is an edge view, seen in the direction of the arrow IV in FIG. 2,
FIG. 5 is a perspective view of the plate in FIG. 1, with two segments shown at a larger scale, and
FIG. 6 is a perspective view of an alternate embodiment of the plate according to the invention.
The floor shown in FIG. 1 is covered by several rows of plates 1, said rows being shifted one half plate length with respect to each other such that the plates are lying in bond. The plates in every other row is turned 180.degree. about a vertical axis in order to fit together with the plates in the adjacent rows. At their ends, some of the rows have been completed by half plates 1'.
The particular design of the plates 1 will appear from FIGS. 2-5. FIG. 2 shows the plate seen from above, and the right longitudinal edge 2 is here provided with two short so-called upper lips 3 and an intermediate long lower lip 4. The left longitudinal edge 5 is conversely provided with two short lower lips 6 and one long upper lip 7. The short sides of the plate 1 are provided with a groove 8 which extends all the way out to the bottom of the lips, as shown most clearly in FIGS. 3 and 5.
Furthermore, FIG. 3 shows the relationship between the thickness T of the plate 1 and the thickness t of the upper and lower lips. The thickness t of the lips is preferably from 40% to 49% of the thickness T of the plates, preferably between 46% and 48% thereof. In order to give the plate optimum strength and stability in relation to the price, it is suggested to make it from plywood. The plate may have a nominal length of 240 cm and a width of 120 cm, while the plate thickness T advantageously may be 18 mm. With this plate thickness, the lip thickness t may be 8,5 mm, thus forming a virtual clearance of 1 mm between the upper and lower lips when these are viewed in the direction of the arrow III in FIG. 2. This clearance facilitates the joining of the plates when they are not absolutely flat or when
REFERENCES:
patent: 2256836 (1941-09-01), Potchen
patent: 3657852 (1972-04-01), Worthington et al.
patent: 3895148 (1975-07-01), Chang
patent: 3902293 (1975-09-01), Witt et al.
Brodrene Furst AS
Dorsey Dennis L.
Friedman Carl D.
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