Resilient railway bogie

Claim 1

A truck for a vehicle, especially a railway freight car, comprising: first and second pairs of laterally spaced apart wheels operable for running on rails; two axles each interconnecting the wheels in one of said pairs of wheels; a cross-beam extending substantially parallel to said axles; four rocker arms each connected at one end thereof to one end of each of said axles and the other end of each rocker arm connected to said cross-beam; two spring rods each extending substantially parallel to said cross-beam and establishing a torsion connection between said rocker arms connected to the same axle; a plurality of ball joint-type means connected to said cross-beam for mounting said spring rods and said rocker arms; spring means interconnecting said cross-beam to said rocker arms and operable to urge said cross-beam and said rocker arms to an equilibrium relationship with respect to each other, whereby said axles exhibit pendulum movements in vertical and horizontal directions relative to said cross-beam; and an imaginary plane defined by said one ends of said rocker arms being disposed vertically below another imaginary plane defined by said other ends of said rocker arms.