Metering device for sand spreading devices, especially for rail vehicles
USRE40735E1 · kind E1 · reissue
2Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2007 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | Feb 28, 2027 |
Classification
- Technology area (CPC —)General
Abstract
Metering or dosing device for sand spreading apparatuses with a metering piston for sealing off and releasing the throughflow opening for the material to be spread, in which the metering piston and the opposite housing wall of the passage hole have profiles overlapping each other so that a labyrinth-like outflow of the spread material results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.