Side bearing unit for railroad car
US4998997A · kind A · utility
35Cited by
10References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1990 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Mar 5, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F2236/045
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A top cap and housing cooperate to create an internal void wherein is located two elastomeric springs, one on top of the other. Two different solid stop systems are incorporated into the top and housing. An interlocking system also movably secures the top cap and housing such that the two thermoplastic elastomeric springs can be subjected to a preload. The thermoplastic elastomeric springs are designed and housed so that through a cycle from free height to solid height they are folded and flexed rather than compressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.