Patent ID: 7032610

Claim:
A float valve device comprising: a valve case; and a float valve member arranged to acts upward and downward in the valve case; and a angle regulating unit wherein: the valve case and the float valve member are injection-molded of a resin; the valve case includes a valve chamber, in which the float valve member is arranged, a partition wall portion formed in the upper portion of the valve chamber, and a communication hole formed in the partition wall portion; the float valve member acts upward and downward according to the level of a liquid to flow into the valve chamber and includes a crest portion for closing the communication hole when it abuts against the partition wall portion; the inner circumference of the communication hole of the valve case is deformed to a first direction with respect to the roundness, as caused by the gate position at the injection molding time; the outer circumference of the crest portion of the float valve member is deformed to a second direction with respect to the roundness, as caused by the gate position at the injection molding time; an allowable angle of the float valve member related to the valve case is so set that the first direction and the second direction is substantially aligned; and the angle regulating unit interposed between the valve case and the float valve member for preventing the angle of the float valve member with respect to the valve case from varying over the allowable angle when the float valve member acts upward and downward.