The present invention concerns novel sphingolipid-polyalkylamines conjugates, a process for their preparation and pharmaceutical compositions comprising the same. In particular the invention relates to a single-pole or multi-pole double break switching device for low voltage systems comprising, for each pole, at least a first pair of contacts and at least a second pair of contacts. A platform is attached to the vehicle with the top segment only being attached to the platform. The waste toner container is movable through space, which is occupied by the second feed roller in an upper position, and the first opening when the second feed roller is in a lower position.