Flat railcar work platform and wheel assembly with locking mechanism
US7950628B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2009 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Aug 21, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F13/006
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An extendable railcar work platform includes one or more work platform sections each including a set of wheels, a locking mechanism associated with each wheel and a guide system. The system enables workers to safely work above an electrified third rail such as in a subway or railway tunnel. The platform may be in a first retracted position for transit or in a laterally extended or vertically extended position to enable a worker to access and work on a tunnel wall. The platform may be extended to both sides of the railcar and, if the platform includes more than one section, the individual sections may be simultaneously extended to opposite sides of the railcar. Each work platform section includes a floor or base and safety rails around all four sides of the section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.