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US 8,074,933 B2Granted
Aircraft graywater ejection system
AssigneeGoodrich Corporation
InventorsBryan J. Mackulin, Mark A. Hampson
Life of this patent
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Abstract
An aircraft (10) having a cabin (14) with a plurality of potable-water-using stations (22) that drain graywater to a transfer tank (24). The graywater ejection system pressurizes the transfer tank (24) at appropriate times and/or places, so that graywater can be ejected through a drainmast (26) without the help of gravity. This graywater ejection system eliminates the need for a discharge line from the transfer tank (24) and frees the aircraft's fuselage (12) from having an inconvenient port associated with such a discharge line.
Claims18
An aircraft comprising
- a fuselage defining a cabin;
- a potable-water-using station in the cabin;
- a transfer tank for graywater drained from the potable-water-using station, wherein the transfer tank is not in fluid communication with blackwater;
- a drainmast mounted to the fuselage;
- an eject line from the transfer tank to the drainmast;
- tank-pressurizing means for pressurizing the transfer tank so that graywater is ejected through the drainmast without the help of gravity;
- a drain line from the potable-water-using station to the transfer tank;
- and
- a drain-only valve in the drain line upstream of the transfer tank that is closed during pressurizing of the transfer tank.
6 more elements
Dependencies are inferred from the claim text.