Water flow apparatus

Abstract

A guttering system for water drainage of roofs and buildings. The gutter system comprising a first elongate covered channel member capable of carrying water flow in a first direction and at least a second elongate covered channel positioned above or below said first elongate covered channel, capable of transporting water in a same said direction of water flow.

1 . A gutter system comprising:
 a first elongate covered channel capable of carrying water flowing in a first direction; and   a second elongate covered channel positioned above said first elongate covered channel, said second channel capable of carrying water flowing in said first direction.   
     
     
         2 . The gutter system as claimed in  claim 1 , comprising an open channel positioned above said first and second channels, for collection of rainwater. 
     
     
         3 . The gutter system as claimed in  claim 1 , wherein said first and/or second channels are substantially sealed along their whole lengths, except at their ends. 
     
     
         4 . The gutter system as claimed in  claim 1 , having a channel cross sectional area which is continuously variable along its length. 
     
     
         5 . The gutter system as claimed in  claim 1 , wherein said first and/or second channel has a cross sectional area which increases in the direction of water flow. 
     
     
         6 . The gutter system as claimed in  claim 1 , wherein said first and/or second channel is of a substantially constant height along its full length. 
     
     
         7 . The gutter system as claimed in  claim 1 , wherein said first and/or second channel has a substantially rectangular cross sectional area in a direction perpendicular to a main length of said gutter. 
     
     
         8 . The gutter system as claimed in  claim 1 , comprising:
 a first water inlet positioned at a first end of said gutter for allowing water to enter said first channel;   a first water outlet positioned at a second end of said gutter for draining water from said first channel;   a second water inlet positioned at said first end of said gutter for allowing water to enter said second channel; and   a second water outlet positioned at said second end of said gutter for draining said second channel.   
     
     
         9 . The gutter system as claimed in  claim 1 , comprising a debris guard vortex reducing means for minimizing vortex formation in and around at least one water inlet. 
     
     
         10 . A gutter system as claimed in  claim 1 , wherein:
 said first channel is formed within a first cavity, said first cavity having a substantially trapezoidal cross sectional area as viewed in a direction perpendicular to a main length of said gutter;   said first channel is defined by at least one elongate tapered insert fitted inside said first cavity;   said second channel is formed within a second cavity, said second cavity having a substantially trapezoidal cross sectional area as viewed in a direction perpendicular to a main length of said gutter; and   said second channel is defined by at least one tapered insert member fitted within said second cavity.   
     
     
         11 . A gutter section comprising:
 an elongate trough having a floor, a first elongate upright side wall and a second elongate upright side wall; and   an elongate cover member spaced apart from said floor and extending between said upright side walls, and closing off an upper part of said trough at a first height, so as to define an enclosed cavity there between;   wherein:   a single enclosed channel being provided across said trough between said floor and said cover member and extending along a length of said trough.   
     
     
         12 . The gutter section as claimed in  claim 11 , further comprising an open channel positioned above said enclosed channel and defined between said first and second side walls of said trough. 
     
     
         13 . The gutter section as claimed in  claim 11 , wherein said enclosed channel has a variable cross sectional area in a direction transverse to a main length of the gutter section. 
     
     
         14 . The gutter as claimed in  claim 11 , comprising at least one insert member located between said floor and said cover, said insert member having a cross sectional area in a direction perpendicular to its main length which varies between first and second ends of said insert member. 
     
     
         15 . The gutter as claimed in  claim 11 , comprising a pair of insert members located between said floor and said cover, at least one of said insert members being tapered, wherein said channel is positioned between said pair of insert members. 
     
     
         16 . The gutter section as claimed in  claim 11 , comprising a water inlet for allowing water to enter said enclosed channel. 
     
     
         17 . The gutter section as claimed in  claim 11 , comprising a water outlet for allowing water to drain from said enclosed channel. 
     
     
         18 . The gutter section as claimed in  claim 11 , comprising at least one insert member located between said floor and said cover, said insert member having a cross sectional area in a direction perpendicular to its main length which varies between first and second ends of said insert member. 
     
     
         19 . The gutter section as claimed in  claim 11 , comprising a pair of insert members located between said floor and said cover, at least one of said insert members being tapered, wherein said channel is positioned between said pair of insert members. 
     
     
         20 . The gutter section as claimed in  claim 11 , comprising a second elongate cover member positioned above said first cover member, so as to define a second cavity on top of said first cavity and running substantially parallel therewith, between said second cover, said first cover and said first and second upright side walls.