Railway rail pad
US8201751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Oct 16, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B9/686
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a railway rail pad having a rail seat portion for receiving a foot of a railway rail, the rail seat portion is provided on at least one major face thereof with a plurality of protrusions which are unevenly distributed across the face of the rail seat portion such that the ratio of the area of the face occupied by the protrusions to the area of the face free of protrusions is greater in an edge region of the rail seat portion than in a central region of the rail seat portion, the edge region being adjacent to one edge of the pad and the central region being adjacent to the edge region. The studs are arranged in columns, each stud being of substantially the same size, and the number of studs in a column in the central region which is closest to said edge region being greater than in a column closer to the center of the rail seat portion. The studs are also arranged in rows, wherein the ratio of protrusions to free area in a row of studs adjacent to, but spaced from, the center of the rail seat portion is greater than that in a row further from the center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.