Electronic blue flag system
US9580094B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2015 |
| Grant date | Feb 28, 2017 |
| Priority date | — |
| Expiry date | Aug 16, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system and a control system for selectively preventing movement of a locomotive is disclosed. The control system may comprise a plurality of access control devices for the locomotive, with each access control device including a status indicator, and being configured to activate or deactivate the status indicator based on user input received by any of the plurality of access control devices. Each access control device may also be configured to transmit status data indicative of a status of the locomotive to a locomotive controller, with the status either being a blue flag status or a ready status, wherein at least one of the access control devices is a mobile device not mounted to the locomotive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.