Abstract: A refueling coupling has an annular fitting 101 having a bore 102, bayonet lugs 103 and slots 104 suiting it for connection to a pressure filling nozzle. A flange 122, drilled with screw holes for securement to a fuel tank (not shown), extends out from the fitting 101. Also not shown for the sake of clarity is a tube extending own from the flange. Rods extend down from the flange 122 to a spider 125, with springs bearing upwards onto the underside of a dry-break member 105, through which the rods extend. The rods, springs and spider are within the non-shown tube. On attaching and opening of a pressure filling nozzle to the coupling, the dry-break member 105 is displaced resiliently inwards fuel can flow past this member and into the tank. The dry-break member has a central aperture 111, normally closed by a plug 112, which is threaded externally 114 and carries an O-ring seal 115 above the thread. The central aperture has a plain bore orifice 116 and is threaded 117 below the plain bore.

Abstract: A method of concentrating sediment in a water tank involves attaching a vortex inducing device to an opening through the roof of the tank between the central vertical axis and the side walling of the tank. The device has a device inlet which narrows to a device outlet. The device outlet is orientated such that, water flowing out via the device outlet induces a vortex within the pooled water, thereby causing sediment to collect centrally on the floor of the tank.

Abstract: A refuelling coupling has an annular fitting 101 having a bore 102, bayonet lugs 103 and slots 104 suiting it for connection to a pressure filling nozzle. A flange 122, drilled with screw holes for securement to a fuel tank (not shown), extends out from the fitting 101. Also not shown for the sake of clarity is a tube extending own from the flange. Rods extend down from the flange 122 to a spider 125, with springs bearing upwards onto the underside of a dry-break member 105, through which the rods extend. The rods, springs and spider are within the non-shown tube. On attaching and opening of a pressure filling nozzle to the coupling, the dry-break member 105 is displaced resiliently inwards fuel can flow past this member and into the tank. The dry-break member has a central aperture 111, normally closed by a plug 112, which is threaded externally 114 and carries an O-ring seal 115 above the thread. The central aperture has a plain bore orifice 116 and is threaded 117 below the plain bore.

Abstract: A method of concentrating sediment in a water tank involves attaching a vortex inducing device to an opening through the roof of the tank between the central vertical axis and the side walling of the tank. The device has a device inlet which narrows to a device outlet. The device outlet is orientated such that, water flowing out via the device outlet induces a vortex within the pooled water, thereby causing sediment to collect centrally on the floor of the tank.

Abstract: A refueling coupling has an annular fitting having a bore, bayonet lugs and slots suiting it for connection to a pressure filling nozzle. A dry-break member is provided within the annular fitting, normally sealing to it with the aid of an O-ring seal. 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, normally closed by a side pivoted flap. The pivot is at a pin carried in lugs on the underside of a central disc having the aperture. The flap has a finger projecting between the lugs and having the pin passing through it. A spring is carried on the pin and normally biases the flap into its closed position parallel with the disc.

Abstract: A refueling coupling has an annular fitting having a bore, bayonet lugs and slots suiting it for connection to a pressure filling nozzle. A dry-break member is provided within the annular fitting, normally sealing to it with the aid of an O-ring seal. 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, normally closed by a side pivoted flap. The pivot is at a pin carried in lugs on the underside of a central disc having the aperture. The flap has a finger projecting between the lugs and having the pin passing through it. A spring is carried on the pin and normally biases the flap into its closed position parallel with the disc. An O-ring is carried on the flap whereby should unusual forces displace fuel against the flap it does not leak.