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US 9,278,700 B2Granted
Fittings for railroad car truck
AssigneeNational Steel Car Limited
InventorsJames Wilfred Forbes, Jamal Hematian
Life of this patent
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AssigneeNational Steel Car Limited
InventorsJames Wilfred Forbes, Jamal Hematian
Estimating the term…
A rail road freight car truck has a truck bolster and a pair of side frames, the truck bolster being mounted transversely relative to the side frames. The mounting interface between the ends of the axles and the sideframe pedestals allows lateral rocking motion of the sideframes in the manner of a swing motion truck. The lateral swinging motion is combined with a longitudinal self steering capability. The self steering capability may be obtained by use of a longitudinally oriented rocker that may tend to permit resistance to deflection that is proportional to the weight carried across the interface. The truck may have auxiliary centering elements mounted in the pedestal seats, and those auxiliary centering elements may be made of resilient elastomeric material. The truck may also have friction dampers that have a disinclination to stick-slip behavior. The friction dampers may be provided with brake linings, or similar features, on the face engaging the sideframe columns, on the slope face, or both. The friction dampers may operate to yield upward and downward friction forces that are not overly unequal. The friction dampers may be mounted in a four-cornered arrangement at each end of the truck bolster. The spring groups may include sub-groups of springs of different heights.
An auxiliary centering member for a railroad freight car truck, the freight car truck having a sideframe and a wheelset to which the sideframe is mounted, the sideframe having a pedestal, the pedestal having a first rocker surface;
A snubber for use between a bearing-adapter and a sideframe of a railroad car truck, the sideframe having a sideframe pedestal, the sideframe pedestal having a roof with a first rolling contact rocker fitting, and a downwardly extending jaw, the jaw having a pair of first and second opposed sideframe pedestal thrust lugs, the bearing adapter having a lower surface for seating on a cylindrical bearing casing of a wheelset bearing, and an upper surface defining a second rolling contact rocker surface in rolling contact rocking engagement with the first rolling contact rocker surface of the sideframe, the bearing adapter having a first end facing the first thrust lug, and a second end facing the second thrust lug, wherein said snubber, as installed and viewed from above, has a first portion that seats between the first end of the bearing adapter and the first thrust lug, a second portion that extends adjacent to a first side face of the first thrust lug, and a third portion that extends adjacent an opposite, second side face of the thrust lug, said snubber being free of any portion impeding rolling contact of the first and second surfaces.
A combination comprising:
Dependencies are inferred from the claim text.