Patent ID: 7267059
Filing Date: 2007-09-11
Classification: B61D,B61F

Abstract:
1. A truck for a rail road freight car, said truck comprising: a pair of first and second sideframes, said sideframes being seated upon wheelsets for rolling motion in a longitudinal direction along railroad tracks; a truck bolster extending in a transverse direction between the sideframes, said truck bolster having a first end carried by said first sideframe, and a second end carried by said second sideframe; a first group of dampers mounted to work between said first end of said bolster and said first sideframe; a second group of dampers mounted to work between said second end of said bolster and said second sideframe; said first group of dampers including at least a first damper, and a second damper, said first damper being mounted transversely outboard relative to said second damper; said first damper being biased to work between said first end of said truck bolster and said first sideframe; said second damper being biased to work between said first end of said truck bolster and said first sideframe; said first and second dampers each seat in a damper accommodationm, the accommodation having a transversely inboard wall and an opposed transversely outboard wall; said first damper being independently biased; said second damper being independently biased; and one of said first and second dampers being independently biased in said transverse direction directly by its mounting in its accommodation to bear against one of (a) said transversely inboard wall; and (b) said transversely outboard wall.