Patent ID: 9038661
Filing Date: 2015-05-26
Classification: E03C,E03F,F16K,Y10T

Abstract:
1. A drain value device, comprising: a base being hollow and cylindrical and having a bottom at which at least one through hole is disposed; a cover disposed at the base and having a drain vent; and a control unit comprising a hollow cylindrical valve, the valve having a top rim corresponding in position to the drain vent, wherein a baffle board is disposed in the valve to partition into a water storage space above and a receiving space below, the receiving space receiving a resilient component holding between the baffle board and the base such that, as soon as an amount of water entering the water storage space exceeds a predetermined level, a resilient force of the resilient component is counterbalanced to thereby allow the valve to move downward and away from the cover, the resilient component being a compression spring with a spring constant of 2×10 wherein the cover is tablet-shaped and extends downward to form a flange enclosing the drain vent, and wherein a first circumferential groove is disposed at the top rim of the valve and adapted to hold the flange.