Device for intercommunication between coupled vehicles in which passengers can walk freely, especially railway cars or road vehicles

A device for intercommunication between two oppositely-facing open ends of two coupled vehicles in which passengers can walk freely, in particular railway cars, road vehicles such as articulated buses or trolley buses or else specialized vehicles such as passenger bridges of the type used in large airports, said device comprising a series of rings of generally rectangular shape which consist alternately of rigid rings and flexible rings suitably attached to each other so as to form a flexible intercommunication tunnel having a longitudinal axis, ends of the tunnel being adapted to be attached respectively to the aforementioned open ends of said vehicles and wherein each rigid ring is constituted by two rigid-ring segments assembled together, said rigid ring segments defining a pair of annular channels formed in an abutting surface thereof, wherein the flexible rings are of elastomer and each has a flexible intermediate portion provided along the longitudinal axis of the tunnel with each end thereof comprising a membrane terminating in a bulge in the form of a substantially cylindrical-strip member, said members being imprisoned in said annular channels.