Abstract: Wheel having a first part rotable around a central axis, with branches inscribed in a circle whose diameter equals that of the wheel, a circular outer surface of all branches forming a first part of the wheel tread, a second part movable relative to the first part between first closed and second open positions, the second part including branches inscribed in a circle whose center coincides with the central axis, apparatus for moving between first and second positions, the first position where the wheel has a complete circular circumference forming a continuous tread and the second position where the wheel has an incomplete circular circumference forming a discontinuous tread. A third wheel part has teeth whose circular outer surface forms a second part of the wheel tread, the teeth pivotally mounted on the first part, driven by movement of the second part, and movable between two positions.

Abstract: The invention relates to a passenger compartment carpet assembly for a vehicle comprising a packing piece (10), a passenger compartment carpet (20) and expandable material (30) injected into a volume present in particular between said packing piece (10) and said passenger compartment carpet (20), the passenger compartment carpet having a lower surface (25) facing towards an upper surface (15) of said packing piece (10). The passenger compartment carpet assembly according to the invention is characterized in that the upper surface (15) of the packing piece (10), when in contact with the lower surface (25) of the passenger compartment carpet (20), includes a first plurality of channels (11) configured in such a way that said channels (11), when injected with expandable material (30), cause the formation of strips of dried expandable material ensuring that the passenger compartment carpet (20) is retained on the packing piece (10).

Abstract: A data transmission method uses at least two communication networks to exchange data. The data transmission method on a first medium includes an operation for opening a communication session on the first communication medium and during the session, an operation for receiving confidential information on a single address terminal on a second communication medium, and an operation or transmitting, on the first communication medium, a confidential message representing the confidential information and an operation for verifying whether the confidential message corresponds to the confidential information.