Rail pads
US5195679A · kind A · utility
13Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1992 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Jul 6, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B9/686
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rail pad comprises a membrane (3) from opposite faces of which there project protrusions (4, 5), which may be ribs, possibly extending along the pad, perhaps over its whole length, or studs. The protrusions are such that no line perpendicular to the membrane passes through more than one of the protrusions. The pad is such that it is stiffer on one side than the other, for example because the ratio between the total area of protruding material and the total area of membrane free of protrusions is greater at the stiffer side of the pad than the other. The pad is preferably made of thermoplastic copolyester elastomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.