Suction control filter system for swimming pools
US4997558A · kind A · utility
25Cited by
8References
29Claims
0Family size
Inventor
Key dates
| Filing date | Jul 1, 1988 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Jul 1, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H4/1209
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A suction control filter system for swimming pools is provided, in which the vacuum filter of the water recirculation system features positive suction backwash of the filter during cleaning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.