Automatic flushing type pre-filtering device
US11077391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2019 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Dec 31, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2307/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is an automatic flushing type pre-filtering device, that includes: a valve head set, a filter cartridge set, a movable rod piece, and a drain valve set. The filter cartridge set includes: a cylinder body; a filter cartridge, disposed in the cylinder body, the filter cartridge includes a filter net rack and a filter net disposed on the filter net rack. A first chamber is formed between the filter cartridge and the cylinder body, and a second chamber is formed inside the filter cartridge. The movable rod piece is provided with a hollow portion inside, and the movable rod piece is disposed in the second chamber. A water separation piece is disposed between the movable rod piece and the filter net rack. A plurality of through holes are disposed on the movable rod piece corresponding to a position of the second chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.