Abstract: The invention relates to a steering device for a vehicle bogey fitted with wheels having pneumatic tires that run on a pair of runways forming a track along which the vehicle travels. The device comprises a steering caster whose mean plane is parallel or substantially parallel to that of the wheels of the bogey and which is capable of rotating about its own axis when engaging in a guide groove installed between the above-mentioned runways of the track ahead of each branch point. The caster is carried by the frame of the bogey via laminated link blocks that confer to the caster and relative to the bogey a small amplitude degree of freedom in rotation about a vertical axis passing through the center of the caster, and a similarly small amplitude degree of freedom in translation along the axis of the caster, but prevent the caster from moving relative to the bogey in the vertical direction.

Abstract: A flexible coupling for pipework comprises a rigid sleeve of circular section engaged coaxially around the ends of pipes to be coupled together and connected to each of said ends in sealed manner by means of respective annular gaskets of flexible and resilient material received coaxially in each of the annular gaps between the ends of the pipe and the ends of the sleeve. The sleeve is made up of an assembly of three rigid tubes in alignment along the same longitudinal axis and assembled together in sealed manner by connection means comprising annular gaskets analogous to the above-mentioned annular gaskets and by two sets of laminated blocks which hold the tubes rigidly in alignment on the longitudinal axis, but which allow limited amplitude mutual displacements thereof with resilient return along the axis and around the axis.