Process for chlorination of swimming pools
US4673513A · kind A · utility
Inventor
Key dates
| Filing date | Jul 2, 1986 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Jul 2, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/06
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Adjustment of chlorine and pH levels in swimming pool water by, (a) treating the water with material selected from the group consisting of cyanuric acid, ammelide and their salts, (b) adding material adjusting the chlorine and acid levels of the water if it has a pH above about 7.5 and adding sodium hypochlorite if the water has a pH about 7.5 or lower, (c) a set number of days later, such as a week, with automatic equipment, without taking a reading of water conditions, adding sodium hypochlorite to the water in a predetermined amount, and (d) continuing the process indefinitely by alternating steps (b) and (c) at intervals of the set number of days. The automatic equipment including a vessel containing sodium hypochlorite solution, a pool water recirculation line including a recirculation pump, and a feeder line from the vessel to the recirculation line. A valve acting on the feeder line to control discharge from the vessel including a pair of valve discs, one stationary and the other rotated through gearing by a standard, commercially available battery powered clock motor. The valve discs having passageways and ports in abutting faces that only communicate to permit discharge th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.