| 摘要 |
A refuelling coupling has an annular fitting (1) having a bore (2), bayonet lugs (3) and slots (4) suiting it for connection to a pressure filling nozzle (50). A dry-break member (5) is provided within the annular fitting, normally sealing to it with the aid of an O-ring seal (6). When the pressure filling nozzle is fitted, the dry-break member is depressed allowing fuel to flow. The dry-break member has a central aperture (11), normally closed by a side pivoted flap (12). The pivot (14) is at a pin (15) carried in lugs (16) on the underside of a central disc (17) having the aperture (11). The flap has a finger (17) projecting between the lugs and having the pin passing through it. A spring (18) is carried on the pin and normally biases the flap into its closed position parallel with the disc. An O-ring (19) is carried on the flap whereby should unusual forces displace fuel against the flap it does not leak. For gravity nozzle fuelling, a gravity fuelling nozzle (52) is placed against the flap and pushed in against its spring. Refuelling can now occur. |
