Safety anti-reversing device for a bottom of a basin

摘要

Able to prevent a leakage flow from a basin in a ground and to enable a filling flow from this ground, a safety anti-reversing device comprises a body comprising communicating openings for passage of the filling flow. Supported by this body, a flexible membrane comprises an annular shutter and a closing portion. The annular shutter is offset with respect to the communicating openings and swivels between a closed down position in which this annular shutter is applied in tight manner on the body, and an open position in which the annular shutter is away from the body. Distinct from the annular shutter, the closing portion covers the communicating openings so as to be able to hermetically close these communicating openings.

主权项

1. A safety anti-reversing device for a bottom of a basin in a ground, the safety anti-reversing device comprising:
a body comprising communicating openings for passage of a liquid, and a flexible membrane supported by the body and deformable, from a closed configuration in which the flexible membrane closes said communicating openings in tight manner so as to prevent leakage flow from the basin to the ground, to a pass-through configuration in which a filling flow of the liquid toward the basin is enabled passing through the body via the communicating openings, wherein the flexible membrane comprises:
an annular shutter offset with respect to the communicating openings and swivelling between a closed-off position in which the annular shutter is applied in tight manner on the body, and an open position in which the annular shutter is away from the body, the closed-off position of the annular shutter corresponding to the sealed-off configuration of the flexible membrane, and the open position corresponding to the pass-through configuration of the flexible membrane, anda closing portion that does not swivel with respect to the body, distinct from the annular shutter and covering the communicating openings so as to be able to hermetically close the communicating openings, in the sealed-off configuration, and to be moved away from the communicating openings by a thrust force of the liquid from the ground to the basin in the pass-through configuration, the closing portion and the annular shutter forming part of a same wall under which the filling flow of the liquid can pass from the communicating openings to a level of a free edge of the annular shutter, when the flexible membrane is in the pass-through configuration, at the level of the closing portion, the flexible membrane comprises a succession of annular ribs for flexible biasing the closing portion towards an annular wall of the body, between the closing portion and the annular shutter, the flexible membrane comprises a portion of greater flexibility defining an annular hinge around which the annular shutter is swivel-mounted, and at the level of the annular hinge, the flexible membrane comprises circular grooves that define at least one thinned area to enhance the flexibility of the annular hinge, the thinned area extending along the same closed curve as the annular hinge.