| 摘要 |
An underpressure-activated valve device for a drinking container ( 32 ). The device consists of an outer membrane ( 2 ) and an inner membrane ( 4 ) that are placed at an axial distance from one another, and their peripheral attachment areas are pressure-sealingly interconnected, causing a reference pressure chamber ( 6 ) having at least one vent ( 8 ) to an ambient pressure P 1 to exist between the membranes ( 2, 4 ). One membrane ( 2, 4 ) is fixedly connected to a flow pipe ( 10 ), and the other membrane ( 4, 2 ) is provided with a membrane opening ( 12 ) within which the pipe ( 10 ) is movably arranged. The membrane opening ( 12 ) is associated with a primary sealing body ( 18 ) for sealing against fluid flow via the pipe ( 10 ), and with a secondary sealing body ( 16 ) for sealing between the chamber ( 6 ) and an internal pressure P 3 in the container ( 32 ). Both sealing bodies ( 16, 18 ) are placed in pressure-sealing contact with the pipe ( 10 ) when the valve device is in an inactive position of rest, while at least the primary sealing body ( 18 ) is placed in an open position when the valve device is in an active position.
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