Surface Drainage System

Abstract

The invention relates to a drainage system for draining away liquid from a surface including a base installed below the surface and a first and second wall. The first and second wall each extend from the base at an acute angle towards one another, defining an opening. In use the base, first wall and second wall form a conduit and liquid can drain into the drainage system through the opening and drain away along the conduit. The configuration of the drainage system assists to maintain the drainage system in place in the surface and acts against deformation from downward forces. The invention also relates to a mesh, grate or other covering for the base, first wall and second wall.

1 . A drainage system for draining away liquid from a surface including:
 a base installed below the surface;   a first wall extending from the base at an acute angle to the base; and a second wall extending from the base at an acute angle to the base, the first wall and the second wall extending towards one another to define an opening between the first wall and the second wall,   
       wherein, in use, the base, first wall and second wall form a conduit and liquid can drain into the drainage system through the opening and drain away along the conduit and the configuration of the drainage system assists to maintain the drainage system in place in the surface and acts against deformation from downward forces. 
     
     
         2 . (canceled) 
     
     
         3 . The drainage system according to  claim 2 , wherein the surface includes a layer of soil and or a layer of sand below a grassed layer. 
     
     
         4 . (canceled) 
     
     
         5 . The drainage system according to  claim 1 , wherein the first wall and or second wall is at an angle to the base in the range of substantially 40 to 80 degrees. 
     
     
         6 . (canceled) 
     
     
         7 . The drainage system according to  claim 1 , wherein the base, first wall and second wall form a fluming along which liquid can flow or drain. 
     
     
         8 . (canceled) 
     
     
         9 . The drainage system according to  claim 7 , wherein a plurality of lengths of fluming are used overlapping one another to form a continuous conduit. 
     
     
         10 . The drainage system according to  claim 1 , wherein the base, first wall and second wall form a conduit along which liquid can flow or drain with a substantially quadrilateral shape in cross-section when a line is drawn across the top from the first wall to the second wall. 
     
     
         11 . (canceled) 
     
     
         12 . The drainage system according to  claim 1 , wherein, the drainage system dovetails into the ground to help to maintain the drainage system in the ground. 
     
     
         13 . The drainage system according to  claim 1 , wherein some soil is filled over the first wall and or the second wall to assist to maintain the surface drainage system in the ground and to resist lifting pressures. 
     
     
         14 . The drainage system according to  claim 1 , wherein the shape of the base, first wall and second wall acts against deformation caused by vehicles driving over the drainage system. 
     
     
         15 . The drainage system according to  claim 1 , wherein a grate, mesh or similar can be supported across the opening. 
     
     
         16 . (canceled) 
     
     
         17 . (canceled) 
     
     
         18 . (canceled) 
     
     
         19 . The drainage system according to  claim 1 , wherein a mesh is included resting on or across the top of the first wall and the second wall. 
     
     
         20 . (canceled) 
     
     
         21 . (canceled) 
     
     
         22 . (canceled) 
     
     
         23 . (canceled) 
     
     
         24 . The drainage system according to  claim 1 , wherein a substantially domed shaped part is included lying substantially across at least part of the open top of the first wall and second wall and the domed shape assists to prevent injury of a person on impact. 
     
     
         25 . The drainage system according to  claim 24 , wherein the domed part is a domed mesh to allow water to flow into the drainage system. 
     
     
         26 . The drainage system according to  claim 24 , wherein the domed part is a domed mesh and includes one or more supports to assist to resist against downward forces. 
     
     
         27 . The drainage system of  claim 26 , wherein a pair of supports are included and the supports are substantially a right-angled triangle shape in cross-section. 
     
     
         28 . (canceled) 
     
     
         29 . The drainage system according to  claim 1 , wherein one or more drainage holes are included, in the first wall, second wall, and or base. 
     
     
         30 . (canceled) 
     
     
         31 . (canceled) 
     
     
         32 . The drainage system according to  claim 29 , wherein as water flows along the drainage system hydraulic pressure is reduced by the drainage holes allowing water outside the drainage system to flow into the drainage system. 
     
     
         33 . The drainage system according to  claim 1 , wherein joint fixing holes are included along an edge of the first and or second wall towards the opening. 
     
     
         34 . (canceled) 
     
     
         35 . (canceled) 
     
     
         36 . (canceled) 
     
     
         37 . A drainage system for draining away liquid from a surface including:
 a base installed below the surface;   a first wall extending from the base at an angle of substantially 60 degrees to the horizontal;   a second wall extending from the base at an angle of substantially 60 degrees to the horizontal, the first wall and the second wall extending towards one another to define an opening between the first wall and the second wall; and   a corrugated mesh or similar lying across the opening,   
       wherein, in use, the base, first wall, second wall and corrugated mesh form a conduit with a substantially quadrilateral cross-section, and liquid can drain into the drainage system through the corrugated mesh and opening and drain away along the conduit and the quadrilateral shape of the drainage system assists to maintain the drainage system in place in the surface and acts against deformation from downward forces. 
     
     
         38 . (canceled) 
     
     
         39 . A drainage system for draining away liquid from a surface including:
 a base installed below the surface;   a first wall extending from the base at an angle of substantially 60 degrees to the horizontal;   a second wall extending from the base at an angle of substantially 60 degrees to the horizontal, the first wall and the second wall extending towards one another to define an opening between the first wall and the second wall; and   a mesh including at least one domed part lying across the opening,   
       wherein, in use, the base, first wall, second wall and mesh form a conduit and liquid can drain into the drainage system through the mesh and opening and drain away along the conduit and the shape of the drainage system assists to maintain the drainage system in place in the surface and acts against deformation from downward force.