Insulator for railway fastening clip and railway rail fastening clip for use therewith
US8888012B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2010 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Jan 25, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B2205/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electrical insulator for use with a rail fastening clip comprises a contact member providing on one side a substantially flat rail contact surface for contacting a foot of a rail and on the opposing side a clip contact surface for contacting a rail bearing surface of a bearing portion of the clip, the insulator also having retaining means for retaining the insulator on the clip in such a way as to allow rotation of the insulator about a longitudinal axis of the bearing portion of the clip. The insulator has stop portions for limiting such rotation about the longitudinal axis of the bearing portion of the clip to a desired extent. The clip contact surface of the insulator is convex, in a vertical plane which is perpendicular to the longitudinal axis of the bearing portion of the clip, such that, when the insulator is attached to a clip having a flat rail bearing surface, a contact region between the flat rail bearing surface of the clip and the clip contact surface of the insulator is linear. The insulator is rockable about the linear contact region within the extent defined by the stop portions such that, when the rail contact surface of the insulator contacts the surface of a r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.