| 摘要 |
1. Pressure-equalising device with an upper housing part (1) displaying a central outer gas port opening (5) in the cover (4), a valve seat in the lower housing part (2) and displaying an inner gas port opening (10) and a sealing disc (3) in the valve space (7) between valve seat and cover (4), wherein the valve space (7) possesses a closed circumferential wall (6), which connects the cover (4) at the upper housing part (1) and the bottom (9) of the valve seat at the lower housing part (2) and surrounds the sealing disc (3) at a suitable spacing to form a gas port (15) lying in series with the outer and the inner gas port opening (5, 10), wherein the areally closed sealing disc (3) is loosely enclosed in the valve space (7) to be movable to and fro between the contact against the valve seat and the contact against the cover (4), characterised thereby, that the inner cover surface (8) facing the valve space (7) runs concavo-conically towards the outer gas port opening (5) and that the valve seat consists of cogs (12) projecting from the bottom (9), which contains the inner gas port opening (10), of the valve space (7) and between them leaving gas passage paths (11) free between inner gas port opening (10) and circumferential wall (6). |
