Patent ID: 6910231

Claim:
A toilet system comprising: a toilet pan, a flushing arrangement for providing flushing liquid, a conduit which is connected to the toilet pan and leads to a waste disposal conduit, means for transporting a waste substance from the toilet pan into the conduit and into the waste-disposal conduit, the means having, in the conduit, a first valve and a second valve and a pressure chamber disposed between said first valve and said second valve, said pressure chamber being operative to produce a negative pressure, for the suction extraction of the waste substance from the toilet pan, and a positive pressure, for transporting the waste substance, once extracted by suction, into the waste-disposal conduit, said pressure chamber having a piston cylinder and a piston; a drive, said piston being connected to said drive and being movable by said drive within said cylinder in order to produce the positive pressure and negative pressure, and an electronic control means, the drive and the two valves being selectively controlled by said control means whereby, for the suction extraction of the waste substance from the toilet pan, the piston is controlled to move to create the negative pressure in the chamber with the valves closed, and thereafter one of said first and second valves is rapidly opened whereby the waste substance is extracted from the toilet pan into said pressure chamber with a force.