Rail road car truck and bolster therefor
US7631603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2004 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Dec 3, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61F5/32
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
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 such that the bolster can move laterally relative to the sideframes. The range of travel of the bolster may be greater when the car is fully laded than the car has no lading. This may be achieved by the use of tapered bolster gibs. Friction dampers are mounted to work between the bolster and the sideframes. 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 be mounted in a four-cornered arrangement at each end of the truck bolster. The friction dampers may include members having two rotational degrees of freedom such as may tend to permit the friction elements to accommodate changes in angular orientation between the bolster and the sideframes during pitch and yaw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.