Railway truck

A railway truck for pivotably supporting a railway car comprising:

• first and second wheelsets each comprising at least a left and a right wheel adjacent opposite ends of an axle, said left and rights wheels of said first and second wheelsets respectively being alignable to follow a common path;
• each said axle being supported for rotation about an axle axis thereof by a respective bearing adjacent each said left and right wheel, each said bearing being supported in a respective bearing support;
• a first frame member extending between said bearing support adjacent said left wheel of said first wheelset and said bearing support adjacent right wheel of said second wheelset, said first frame member being swivelably coupled to said bearing supports for rotation about an axis orthogonal to said axle axis;
• a second frame member extending between said bearing support adjacent said left wheel of said second wheelset and said bearing support adjacent said right wheel of said first wheelset, said second frame member being swivelably coupled to said bearing supports for rotation about an axis orthogonal to said axle axis;
• said first and second frame members being free to move without interference from each other to cause said left and right wheels respectively to move toward or away from each other in response to movement in the opposite direction by the other of said left and right wheels to cause said truck to steer in response to a change in a rolling direction of either of said first and second wheelsets;
• and
• one of said first and second frame members having support means thereon for pivotably supporting said railway car.