Vacuum filter for swimming pools controlling water recirculation capacity to accommodate varying gutter flow
US4627118A · kind A · utility
Inventor
Key dates
| Filing date | May 4, 1984 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | May 4, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/204
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vacuum filter is provided for vacuum flow filtration through a filter bed of water from a swimming pool including flow from the pool and from the gutter of the swimming pool, and controlling water recirculation capacity to accommodate varying gutter flow, comprising a tank; a filter bed of particulate material in the tank; a first inlet line communicating the swimming pool with the tank for gravity flow into the tank and maintaining a predetermined level of water in the tank in relation to a level of water in the swimming pool, thereby providing a head of water for gravity backwash flow through the filter bed; a second inlet line communicating the tank with the perimeter gutter for the swimming pool for gravity flow into the tank; a third inlet line communicating the tank with the perimeter gutter for the swimming pool for suction flow into the tank; an outlet line communicating the tank with the water recirculation system; a pump drawing a vacuum downstream of the filter bed and recirculating filtered water to the swimming pool; valves controlling flow into the tank via the first, second and third inlet lines; and at least one water level-responsive sensor sensing and directly r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.