| 摘要 |
A cap with valve for positive pressure comprises a cap body installed to an aperture of a container such as a fuel tank or a radiator of an automobile, a partition wall formed within the cap body and extending from an inner circumferential surface in radial direction and having a first fluid flowing hole, and a valve for positive pressure disposed at upper side of the partition wall. A support plate is disposed at lower side of the partition wall within the cap body and provided with a second fluid flowing hole, and an auxiliary valve chamber is formed between the partition wall and the support plate. Within the auxiliary valve chamber, a stopper valve having specific gravity larger than that of liquid within the container and a float having specific gravity of the combined body with the stopper valve smaller than that of the liquid within the container are arranged at lower side of the first fluid flowing hole and movable up and down. When the container is reversed in upper and lower positions, the stopper valve is moved by own weight towards the partition wall thereby the first fluid flowing hole is closed. Also when the liquid level within the container rises, both the stopper valve and the float are floated, and the first fluid flowing hole is closed by the stopper valve. Consequently, the liquid within the container is prevented from passing through the first fluid flowing hole and flowing out of the container.
|
