Metering device for granular material
US9637140B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 2014 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Oct 15, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/1221
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A metering device for granular material, includes a housing that can be arranged inside a container for the granular material. The housing has at least one inlet for the granular material and an outlet, which outlet can be closed by a sealing element. The sealing element is arranged on a metering piston, which is preloaded by a spring and can be moved axially in a compressed-air cylinder, wherein a compressed-air connection is provided on the compressed-air cylinder such that the metering piston can be moved against the spring by compressed air and the outlet can be opened, and the spring has an at least two-stage design such that the stroke of the metering piston can be changed at least in two stages by varying the compressed air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.