| 摘要 |
<p>The invention discloses a unidirectional valve for fluids, particularly suited to be installed on containers. The valve includes a valve-body (2,42) substantially in the shape of a cylidrical cap, preferably made of plastic material and provided with holes (15, 45) on the bottom (16) and with a flexible plastic disk with a central hole (10). The disk (6) is locked in the interior of the valve-body (2) through a groove (8) obtained around the internal perimeter of the cap itself, while the edge of the hole (10) contrasts against the surface of the central core of the valve-body. When the pressure outside the container (4,43) is higher than the internal pressure, the edge of the central hole (10) of the disk (6) or a crown around this hole, adheres to a corresponding edge, or surface belonging to the central core of the valve-body, thus creating the seal, while if the internal pressure is higher than the external pressure, the middle of the disk (6) rises and forms an annular opening for the passage of the fluid towards the outside.</p> |
