Patent ID: 8899600

Claim:
A device mounted on a wheel set that comprises: a rocker beam ( 14 ) connected firstly to a tiltable frame ( 10 ) by means of a shock absorber ( 17 ) and secondly to two oscillating arms ( 7 , 8 ) via two connecting rods ( 13 , 15 ); and blocking means ( 27 ) having a first anchor point on said rocker beam ( 14 ); the device being characterized in that it includes decoupling means constituted by a horizontal lever ( 21 ) and a vertical lever ( 22 ) that are connected together by a connection point ( 24 ) about which they are capable of pivoting, the free ends of said levers being connected respectively to said frame and to said rocker beam, a second anchor point of said blocking means ( 27 ) being on said decoupling means.