Switch machine improvements
US7152830B2 · kind B2 · utility
3Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2004 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Dec 6, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L5/065
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control mechanism for moving switch points on a railroad track, having a drive screw driven by a motor, a traveling block moving along the drive screw to position the switch points, an end stop on the drive screw for limiting movement of the traveling block, a hand crank for manually turning the drive screw, and a torque limiting clutch on the hand crank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.