Baths – closets – sinks – and spittoons – Flush closet – Reduced gravity environment type
Patent
1980-11-24
1982-06-01
Artis, Henry K.
Baths, closets, sinks, and spittoons
Flush closet
Reduced gravity environment type
4321, 4323, 4431, 4434, 137205, 137236R, 137236S, 137805, E03D 5016, E03D 1100, B64D 1102
Patent
active
043320414
ABSTRACT:
A drainage apparatus for an aircraft lavatory system includes a waste holding tank that receives waste from the individual toilet units. The waste holding tank has a pressurization port and a waste drain opening formed in an upper portion thereof. A blower is coupled to the pressurization port to force air into the tank to pressurize it, thereby forcing waste out of the tank through the waste drain opening. The waste travels through an internal waste drain conduit having a first end located at the bottom of the tank below the level of the waste and a second end coupled to the waste drain opening. Preferably, a flow control device is interposed in fluid communication between the blower and the pressurization port and is operable to direct the flow of air from the blower either into the tank for pressurization or out of the tank to create a partial vacuum within the tank to aid in vacuum flush of the toilet units. An auxiliary pressurization source is also provided in the event of blower failure. The flow control device is preferably remotely operable by ground service personnel working outside the aircraft.
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Artis Henry K.
The Boeing Company
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