Road structure – process – or apparatus – Pavement – Modules or blocks
Patent
1984-03-09
1986-07-15
Leppink, James A.
Road structure, process, or apparatus
Pavement
Modules or blocks
404 40, 404 41, 404 46, 52581, 52593, E01C 514, E01C 908
Patent
active
046003363
ABSTRACT:
An interlocking wooden mat assembly for supporting heavy equipment and vehicles around oil field drilling sites and the like comprises a three layered lamination of substantially parallel and closely spaced wooden planks forming each layer. Selected planks of the top layer are offset longitudinally and extend beyond the intermediate layer at one end to provide a male extension on one end and a female recess at the other end. Selected planks of the intermediate layer are offset laterally to extend beyond the surface and underlying layers at one side to provide a male extension on that side and a female recess at the other side. The surface layer has one less plank than the underlying layer to provide an exposed area on the side of the intermediate layer and to expose recessed areas on one side plank of the underlying layer. The mats may be removably secured together in end-to-end and edge-to-edge relation by the male extensions fitting the female recesses and being nailed together at the point of overlap. A removable tie-in plank is secured over the exposed nailed joints of adjacent mats to interlock such mat assemblies together. Each mat assembly may have loops of cable for lifting and transporting.
REFERENCES:
patent: 152299 (1874-06-01), McCauley
patent: 2652753 (1953-09-01), Smith
patent: 2819026 (1958-01-01), Leyendecker
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patent: 3703059 (1972-11-01), Kessler
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patent: 4016692 (1977-04-01), Jordan et al.
patent: 4289420 (1981-09-01), Davis et al.
patent: 4462712 (1984-07-01), Penland, Sr.
Leppink James A.
Letchford John F.
Mosely Neal J.
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