Cover

Abstract

Covers for structures, for example drainage channels or the like, which can be installed into a floor are known, said covers comprising a surface ( 11 ) which can be accessed and driven over and which comprises a flat structure ( 13 ) on a first lower plane and elevations ( 14 ) with top surfaces lying above the flat structure ( 13 ) on a second higher plane. The aim of the invention is to improve the non-slip properties and to achieve a self-cleaning effect This is achieved in that the top surfaces ( 15 ) have an anti-slip surface structure which comprises a plurality of individual elevations. The ratio of the air volume below the individual elevations ( 16 ) to the volume of the individual elevations ( 16 ) is Vv/Vm=(0.01 to 0.5)/(0.001 to 0.05).

1 - 10 . (canceled) 
     
     
         11 . A cover of a structure that can be installed in the ground, in particular a shaft, a point runoff, a drainage channel or a similar drainage installation, comprising a surface ( 11 ) that can be walked over or driven over, having a planar structure ( 13 ) in a first, lower plane and elevations ( 14 ) having top surfaces of the elevations ( 15 ), which lie in a second, higher plane above the planar structure ( 13 ), wherein the top surfaces of the elevations ( 15 ) have an anti-slip surface structure, which comprises a plurality of individual elevations ( 16 ) and which is rougher than the lower situated planar structure ( 13 ), characterized in that the ratio of the air volume below the individual elevations ( 16 ) to the volume of the individual elevations ( 16 ) is Vv/Vm=(0.01 to 0.5)/(0.001 to 0.05). 
     
     
         12 . The cover according to  claim 11 , characterized in that the ratio of the air volume below the individual elevations ( 16 ) to the volume of the individual elevations ( 16 ) is Vv/Vm=(0.02 to 0.2)/(0.002 to 0.01). 
     
     
         13 . The cover according to  claim 11 , characterized in that the individual elevations ( 16 ) have different maximum heights. 
     
     
         14 . The cover according to  claim 12 , characterized in that the individual elevations ( 16 ) have different maximum heights. 
     
     
         15 . The cover according to  claim 13 , characterized in that the maximum heights are provided in a distribution within a range of Sz=150 μm to 1.500 μm, preferably 230 μm to 1.000 μm. 
     
     
         16 . The cover according to  claim 14 , characterized in that the maximum heights are provided in a distribution within a range of Sz=150 μm to 1.500 μm, preferably 230 μm to 1.000 μm. 
     
     
         17 . The cover according to  claim 15 , characterized in that the distribution is a random distribution. 
     
     
         18 . The cover according to  claim 16 , characterized in that the distribution is a random distribution. 
     
     
         19 . The cover according to  claim 17 , characterized in that the individual elevations ( 16 ) are designed having a pyramidal shape or truncated pyramidal shape. 
     
     
         20 . The cover according to  claim 18 , characterized in that the individual elevations ( 16 ) are designed having a pyramidal shape or truncated pyramidal shape. 
     
     
         21 . The cover according to  claim 11 , characterized in that the individual elevations ( 16 ) are designed having a pyramidal shape or truncated pyramidal shape. 
     
     
         22 . The cover according to  claim 19 , characterized in that the individual elevations ( 16 ) have a maximum depression height of Sv=50 μm to 500 μm, preferably 85 μm to 310 μm. 
     
     
         23 . The cover according to  claim 20 , characterized in that the individual elevations ( 16 ) have a maximum depression height of Sv=50 μm to 500 μm, preferably 85 μm to 310 μm. 
     
     
         24 . The cover according to  claim 21 , characterized in that the individual elevations ( 16 ) have a maximum depression height of Sv=50 μm to 500 μm, preferably 85 μm to 310 μm. 
     
     
         25 . The cover according to  claim 22 , characterized in that the roughness value of the surface structure is Sa=10 μm to 200 μm, preferably 15 μm to 90 μm. 
     
     
         26 . The cover according to  claim 23 , characterized in that the roughness value of the surface structure is Sa=10 μm to 200 μm, preferably 15 μm to 90 μm. 
     
     
         27 . The cover according to  claim 24 , characterized in that the roughness value of the surface structure is Sa=10 μm to 200 μm, preferably 15 μm to 90 μm. 
     
     
         28 . The cover according to  claim 11 , characterized in that the roughness value of the surface structure is Sa=10 μm to 200 μm, preferably 15 μm to 90 μm. 
     
     
         29 . The cover according to  claim 25 , characterized in that the elongated appearance ratio of the surface structure is Sdr 10 to 500%, preferably 20 to 300%. 
     
     
         30 . The cover according to  claim 26 , characterized in that the elongated appearance ratio of the surface structure is Sdr 10 to 500%, preferably 20 to 300%. 
     
     
         31 . The cover according to  claim 27 , characterized in that the elongated appearance ratio of the surface structure is Sdr 10 to 500%, preferably 20 to 300%. 
     
     
         32 . The cover according to  claim 28 , characterized in that the elongated appearance ratio of the surface structure is Sdr 10 to 500%, preferably 20 to 300%. 
     
     
         33 . The cover according to  claim 11 , characterized in that the elongated appearance ratio of the surface structure is Sdr 10 to 500%, preferably 20 to 300%. 
     
     
         34 . The cover according to  claim 11 , characterized in that the surface structure has an apex density of Spd=0.5 to 20 mm −1 , preferably 1 to 10 mm −1 .