| 摘要 |
A refuelling coupling has an annular fitting 1 and may have a bore 2, bayonet lugs 3 and slots 4 suiting it for connection to a pressure filling nozzle (50, Fig.6). 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 preferably by a side pivoted flap 12. The pivot 14 may be at a pin 15 carried in lugs 16 on the underside of a central disc 17 having the aperture 11. The flap may have a finger 17 projecting between the lugs and having the pin passing through it. A spring 18 may be carried on the pin and can normally bias the flap into its closed position parallel with the disc. An O-ring 19 may be 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, fig.5) is placed against the flap and pushed in against its spring. |
