Patent ID: 8950123
Filing Date: 2015-02-10
Classification: E04D

Abstract:
1. A rainwater head for draining water from a roof, the rainwater head comprising: a) a dome ( b) a drainage pipe ( c) a ball cock mechanism, said ball cock mechanism comprising a floating ball ( wherein: said drainage pipe ( said drainage exit ( said drainage exit is adapted to be disposed at a first position that is higher than the surface of the roof, a first distance is formed between said first position and the surface of the roof, and said first distance is equal to a first preset value; said water outlet hole ( said fulcrum ( said floating ball ( said stopper ( said floating ball ( said floating ball ( when in use: when said floating ball ( when said floating ball ( when the level of the water with respect to the surface of the roof is equal to or higher than a second preset value, said second stopper end is moved to enclose said water outlet hole ( when the level of the water with respect to the surface of the roof is lower than said second preset value, said second stopper end is moved to open said water outlet hole ( said second preset value is smaller than said first preset value.