Patent ID: 9695987
Date: 2017-07-04
CPC Classifications: E03B,F16K,F17C,Y02A,Y10T

Claim:
1. A ball tap for maintaining a predetermined water level inside a water receiving tank, said ball tap comprising a valving element linked to a lever rod that swings vertically according to the water level inside the water receiving tank in a manner enabling the valving element to seat on and separate from a valve seat provided on a secondary side opening end face of a valve orifice that opens on the same axis at that of a secondary side flow passage provided vertically inside a valve body, wherein the valving element includes a valve part provided with a contact projection part that can come into close contact with the valve seat when the valving element is closed, and a flange part having a circular ring shape in plan view which continues downward from a rim of the valve part and is slidable in the secondary side flow passage, and the left and right half circumferences of the upper surface of the flange part have bilaterally symmetrical shapes curved downward in arch shapes, and the left and right lower limit portions of the upper surface of the flange part are set so as to be positioned at the same heights as those of the lower end edges of drainage ports, wherein fluid is allowed to flow via the lower limit and the drainage ports when the valve is moved downward to the open position.