Patent ID: 8882087

Claim:
A pneumatic spring device for a rail vehicle having a sprung chassis and an unsprung subframe, the pneumatic spring device comprising: a pneumatic spring bellows having a plurality of reinforcement elements embedded therein and having first and second ends; first and second stop rings on said sprung chassis and said unsprung subframe, respectively; first and second bead rings on said first and second ends to facilitate clamping said spring bellows to said first and second stop rings, respectively; each one of said bead rings including a core of two mutually separate core rings disposed therein in spaced relationship to each other; the core rings in each one of said bead rings and the stop ring corresponding thereto conjointly defining a clamping region therebetween within the bead rings and on a first side of said core rings; said reinforcement elements passing into said bead rings on a second side of said core rings lying opposite said first side thereof and at a location outside of and away from said clamping region; and, said reinforcing elements extending deep into said bead rings and past both of said core rings on said second side thereof before passing into an S-configuration between said core rings so as to form a loop around said core rings.