US 9,809,936 B2
Substructure for an artificial lawn
Peter Van Reijen, Uden (NL); and Ronald Koning, Zandvoort (NL)
Assigned to DESSO SPORTS SYSTEMS N.V., Dendermonde (BE)
Appl. No. 14/232,543
Filed by Peter Van Reijen, Uden (NL); and Ronald Koning, Zandvoort (NL)
PCT Filed Jul. 9, 2012, PCT No. PCT/NL2012/050490
§ 371(c)(1), (2), (4) Date Jul. 9, 2014,
PCT Pub. No. WO2013/009174, PCT Pub. Date Jan. 17, 2013.
Claims priority of application No. 2007101 (NL), filed on Jul. 13, 2011; and application No. 2008291 (NL), filed on Feb. 14, 2012.
Prior Publication US 2014/0341651 A1, Nov. 20, 2014
Int. Cl. E01C 13/08 (2006.01); E01C 13/02 (2006.01)
CPC E01C 13/083 (2013.01) [E01C 13/02 (2013.01); E01C 13/08 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A substructure for an artificial lawn, comprising a top layer of artificial grass fibres and a substratum positioned under said top layer, which substratum comprises a number of individual layers, including a base layer, an intermediate layer positioned on top of said base layer and a sand layer positioned on top of said intermediate layer,
characterised in that said sand layer consists of at least two sublayers consisting of sand, wherein the first sublayer is a sand fraction having a particle size which is larger than the particle size of the sand fraction of the second sublayer, characterised in that the sublayer having the sand fraction having a particle size which is larger than the particle size of the sand fraction of the second sublayer is positioned near the top layer,
characterised in that a system of pipes is present in the sand layer, through which system of pipes water can be passed, wherein water can exit to the sand layer,
characterised in that the pipe system in the sand layer is positioned in the sublayer that exhibits a particle size smaller than that of said one or more other sublayers.