Inter-carriage passage for a railway train

Claim 1

In a railway carriage set, an inter-carriage passage comprising an intermediate bodywork member of generally annular shape in overlapping relation with adjoining ends of two carriages of said carriage set, a single axle carrying said adjoining ends, and positioning means for positioning said intermediate member so that a transverse median plane thereof extends midway between said carriage ends and generally radially with respect to any curve on which said carriage set is disposed, said positioning means comprising cooperating guide means on said axle and on said intermediate body member for maintaining said transverse median plane in substantial alignment with said axle, and linkage means disposed at an upper part of said intermediate member and pivoted on a point in a longitudinal median plane of said intermediate member, said linkage means being connected between said adjoining carriage ends to accomodate expansion and contraction of an inter-carriage gap, a deformable pneumatic joint disposed between the overlap of said intermediate member with each said carriage end, said joint being hollow and generally toroidal in shape so as to provide a substantially continuous seal of said overlap, and splines on said pneumatic joint in meshing engagement with respective splines on each of said carriage and said intermediate body member in order to eliminate sliding movement of said joint relative to said carriage and said intermediate body member.