Elastomer spring/hydraulic shock absorber cushioning device
US5845796A · kind A · utility
38Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | May 28, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61G9/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A railcar cushioning device includes an elastomeric spring and a hydraulic shock absorber member. The fluid accumulator is located outside of and above the fluid chambers. The accumulator is in communication with the fluid chamber in a non-stroked position, causing entrapped air to be displaced by the fluid, into the accumulator. Free of air, the shock absorber immediately responds to impact forces. The elastomeric spring reduces peak impact forces and returns the piston of the shock absorber to its non-stroked position. The elastomeric spring also absorbs draft forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.