Multi-position valve for backflushing filters
US4862914A · kind A · utility
12Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jul 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87788
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A valve comprises a housing having an inlet port, an outlet port, and a backflush port for discharging the dirt from the filter during a backflushing operation. A first passageway interconnects the inlet port and outlet port, and a second passageway interconnects the outlet port and the backflush port. A displaceable valve member is movable to a filtering position to effect a filtering operation wherein the inlet port is connected to the outlet port via the first passageway, or to a backflushing position to effect a backflushing operation wherein the outlet port is connected to the backflush port via the second passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.