Patent ID: 9475508
Filing Date: 2016-10-25
CPC Classification: B61F

Claim Text:
1. A rail road car truck comprising: a truck bolster mounted transversely between a pair of first and second sideframes, said truck bolster having first and second ends, each of said first and second sideframes having a sideframe window into which a respective one of said first and second ends of said bolster is received; a first spring group, said first spring group being mounted in said window of said first sideframe, said first spring group including a first array of side-by-side coil springs upon which said first end of said truck bolster is carried; a second spring group, said second spring group being mounted in said window of said second sideframe, said second spring group including a second array of side-by-side coil springs upon which said second end of said truck bolster is carried; said first sideframe having a first end and a first pedestal fitting defined thereat, said first pedestal fitting including a pair of first and second opposed pedestal jaw thrust lugs and a pedestal roof; said second sideframe having a first end and a second pedestal fitting defined thereat, said second pedestal fitting including a pair of first and second opposed pedestal jaw thrust lugs and a pedestal roof; said sideframes being mounted on wheelsets, said wheelsets including a first wheelset, said first wheelset having an axle; said axle having a first end and a second end; said wheelset having first and second bearings mounted on said first and second ends thereof, said bearings having substantially cylindrical bearing casings; said first bearing being mounted in said first sideframe pedestal fitting of said first sideframe and said second bearing being mounted in said second sideframe pedestal fitting of said second sideframe; a first bearing adapter and a second bearing adapter, said first and second bearing adapters being mounted upon the casings of said first and second bearings respectively; each of said bearing adapters having a pair of axially spaced arches, longitudinally spaced end walls and pairs of corner abutments, said pairs of corner abutments being axially spaced to bracket respective ones of said thrust lugs, and each of said end walls of each said bearing adapter extending axially between a respective one of said pairs of said corner abutments; said first sideframe being mounted to yaw appreciably relative to said truck bolster, and said second sideframe being mounted to yaw appreciably relative to said truck bolster; a first elastomeric pad member mounted to overlie at least a portion of said first bearing adapter between said first bearing adapter and said first sideframe pedestal roof of said first sideframe; a second elastomeric pad member mounted to overlie at least a portion of said second bearing adapter between said second bearing adapter and said first sideframe pedestal roof of said second sideframe; and a first set of friction dampers mounted to work between said first end of said truck bolster and said first sideframe; a second set of friction dampers mounted to work between said second end of said truck bolster and said second sideframe; said first set of dampers including a first damper and a second damper; said first damper and said second damper being driven independently of each other; said first damper being mounted transversely inboard of said second damper; said first spring group has a lateral shear stiffness, k each of said sideframes has a sideways swinging stiffness, k k