Safety wheel, method of manufacturing such a wheel and bogie equipped with such a wheel
US6679535B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 19, 1999 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | May 22, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49483
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
This invention relates to a safety wheel, for a subway coach bogie, or the like, running on pneumatic tires, adapted to be interposed between a chassis of the bogie and a corresponding tire, said wheel presenting an outer peripheral zone having a braking portion as well as a guiding portion projecting radially outwardly from the braking portion, the hardness of the braking portion being much greater than the hardness of the guiding portion. This may be achieved for example by effecting a selective tempering of the braking portion by peripheral nozzles projecting a cooling liquid. This safety wheel is considerably longer lasting than those of the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.