Railway freight car side bearing
US7549379B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2006 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Feb 28, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61F5/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A long travel constant contact side bearing for railway cars provides better handling characteristics, achieving improved tracking and curving through use of various combinations of features. The side bearing comprises a base and a generally cylindrical wall section extending upwardly from the base. A cup-shaped cap comprises a generally circular top section and a generally cylindrical wall section extending downwardly therefrom. The cap extends into the wall section of the base. At least one coil spring is provided within the base and extends to the underside of the cap. The cup shaped cap includes a centrally located cut out section with an elastomer pad fitted within the cut out section. The cup shaped cap cylindrical wall sections can be coated with a lubricant or hardening substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.