Vertical curve rail and method
US8757340B2 · kind B2 · utility
Inventor
Key dates
| Filing date | May 15, 2012 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Jan 2, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A device and method for suspending or holding down an overhead contact wire used for supplying power to electrical railway vehicles and trolley buses at the crest or trough of a vertical curve where the contact wire has an abrupt change in line angle. The device smoothes out the abrupt angle into a curve, parabolic in form and of a radius that is smooth for trouble-free operation of current collectors while maintaining elastic suspension. Contact wire uplift continues while passing through the device so that there is an avoidance of hard spots which cause uneven and accelerated contact wire wear. The device can further be used at the crest or trough of a vertical curve to maintain contact wire alignment where a horizontal curve with curve pull is encountered concurrently.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.