Multi-port valve
US4105555A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1976 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Dec 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87362
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A valve is provided adapted to multiple modes of use including filter, backwash, rinse, recirculate, and direct to waste, on a swimming pool filter of the type normally filtering water under pressure through a backwash-regenerable filtering medium disposed in a filter tank. The valve comprises closely interfitting, relatively rotatable inner and outer sections having coaxially tapered annular walls defining interiorly open spaces respectively within the sections; the outer section wall has formed therein circularly spaced outer ports including an inlet port, a first outlet port, and a second outlet port. The inner section is normally seated against the outer section wall, its interior space being adapted to define a continuation of the filter tank in continuously hydraulically filled relation against unseating pressure imbalances across the inner section. The inner section wall has formed therein a circular series of inner ports selectively pair-registrable with different pairings of the outer ports to define one or another of the several use modes mentioned above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.