Patent ID: 6977005

Claim:
In an aircraft including an aircraft fuselage, and a vacuum toilet system installed in said fuselage, said vacuum toilet system including a toilet having a toilet bowl, a waste collection tank having an internal pressure below an air pressure prevailing in said toilet bowl, a waste valve connected to an outlet of said toilet bowl, and a waste pipe connecting said waste valve to said waste collection tank; an improvement in said vacuum toilet system, wherein said vacuum toilet system does not include a flushing liquid storage tank, does not include a flushing liquid supply pipe, does not include a flushing liquid nozzle for directing a flushing liquid into said toilet bowl, and expressly excludes all means of supplying a flushing liquid into said toilet bowl, said vacuum toilet system further comprises an air jet arrangement arranged and adapted to direct an airstream downwardly along an interior surface of said toilet bowl toward said outlet, said toilet bowl comprises a structural substrate and a nanocoating provided on said structural substrate to form said interior surface of said toilet bowl, and said nanocoating is a thin film that has a thickness less than 10 nanometers and that is highly ordered and waste material repellant as formed by a nanotechnology process.