Sealing means and sealing valve for container openings

Sealing means and sealing valve for a container having an opening, comprising a housing having a gas release connector, a sealing surface, and a seal arranged in the housing, the seal comprising a circumferential sealing bead adapted, in an unpressurized state, to seat on the sealing surface and, in a pressurized state, to be separated from the sealing surface;

• the seal being made from a rubber-elastic seal material;
• the sealing bead having, on a first pressurized side of the seal, a sealing edge;
• the seal having, on a second side, spring means integral with the seal adapted to act on the sealing edge;
• the spring means having a spring-bead made from the material of the seal, the spring-bead being supported on the wall of the housing opposite to the sealing edge;
• the seal being configured in the shape of an apertured disk and exhibiting an attachment strip on an outer edge, the attachment strip fixing a position of the seal relative to the housing;
• the seal being provided with an opening in the vicinity of its middle;
• the sealing edge bordering on the opening;
• and further comprising pressure distribution means for distributing a pressure of a fluid located in the container over nearly an entire surface of the seal.