Baths – closets – sinks – and spittoons – Tubs – Particular construction or configuration details
Patent
1974-12-13
1976-12-07
Haroian, Harry N.
Baths, closets, sinks, and spittoons
Tubs
Particular construction or configuration details
4 77, 4 79, 4216, 210167, E03D 5016
Patent
active
039953289
ABSTRACT:
A vacuum flush waste diposal system for aircraft; wherein the required vacuum is acquired at altitude through the differential pressure between the aircraft cabin pressure and the ambient pressure above approximately 15,000 feet. When the aircraft is below this altitude or on the ground, the vacuum is provided by a blower. For flushing the toilet bowl, a timing device is initially actuated and functions: to introduce a recirculated flush fluid into a flush ring in the upper portion of the toilet bowl; and to open a drain in the lower portion of the toilet bowl, leading to the vacuum waste line; whereby, the waste and flush water are rapidly propelled through the waste line towards a centrally located holding tank, by the differential pressure acting upon it. Once in the holding tank, the waste fluid is filtered out for further use as the recirculated flush fluid.
The holding tank is positioned within the fuselage of the aircraft and has a vertically oriented filter screen separating the tank longitudinally into a fore and aft compartment, so that the acceleration forces of take-off and the deceleration forces of braking upon landing causes the fluid to slosh fore and aft through the filter screen to aid in the filtration process.
The toilet bowl incorporates integral air slots around the periphery of the toilet bowl so that there is no possibility of inadvertant injury to the user that could be caused by the sudden application of vacuum pressure to a seated occupant.
REFERENCES:
patent: 1996325 (1935-04-01), Cox
patent: 2749558 (1956-06-01), Lemt
patent: 3034131 (1962-05-01), Lemt
patent: 3064274 (1962-11-01), Gleason
patent: 3329974 (1967-07-01), Belasco et al.
patent: 3579651 (1971-05-01), Russo
patent: 3733617 (1973-05-01), Bennett
patent: 3751735 (1973-08-01), Sargent
patent: 3855641 (1974-12-01), Foster
patent: 3868731 (1971-03-01), Stahl
patent: 3922730 (1975-12-01), Kemper
Carolan Raymond J.
Kristoffersen Bjorn R.
Haroian Harry N.
Hartmann H. Gus
The Boeing Company
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