Device for displacing the moveable parts of rail switches or crossings
US6402095B1 · kind B1 · utility
0Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Dec 11, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B21/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a device for displacing the movable parts of rail switches or crossings, in which a plurality of hydraulic cylinder piston units engaging in an offset manner in the longitudinal direction of the rails are each connected in series, at least one directional or seat valve (9) capable of being adjusted in a pressure controlled manner is inserted in the duct (8) that connects the hydraulic cylinder piston units (1 to 4) arranged in series, which directional or seat valve blocks the connection to the consecutive cylinder piston unit if a preset differential pressure is exceeded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.