Electrolysis: processes – compositions used therein – and methods – Electrolytic material treatment
Reissue Patent
1998-12-02
2001-02-20
Valentine, Donald R. (Department: 1741)
Electrolysis: processes, compositions used therein, and methods
Electrolytic material treatment
C205S742000, C204S237000, C204S269000, C204S279000, C210S167150
Reissue Patent
active
RE037055
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a water purifier, and more particularly to a submerged electrolytic cell.
1. Description of Related Art
Sodium hypochlorite is commonly used as a sanitizing agent in swimming pools, and the like, to control bacteria growth. Typical pool maintenance requires adding liquid sodium hypochlorite to pool water. Some pool owners, however, use electrolytic cell devices in their pools or in their filtration systems to produce sodium hypochlorite by electrolysis. Examples of electrolytic cells used to generate sanitizing agents are disclosed in U.S. Pat. Nos. 4,992,156 and 4,790,923.
In water having a hardness greater than 700 parts per million (“hard water”), scale deposits from the water and builds up on surfaces adjacent to a water flow. If an electrolytic cell—and for that matter, pool equipment in general—is used in hard water, scale build-up causes water flow problem. Scale typically builds up and clogs small openings and conduits in the equipment. Thus, some manufacturers recommend using their equipment in water having a total hardness less than 500 parts per million.
SUMMARY OF THE INVENTION
An aspect of the present invention involves a pool purifier for mounting in a swimming pool. The swimming pool has a water circulation system which includes a pipe that communicates with the pool through a port positioned beneath the level of water in the pool. The pool purifier comprises an electrolytic cell which includes a plurality of electrodes. An enclosure forms a housing having an internal cavity in which the electrolytic cell is disposed. A coupler is releasably attached to the housing and is adapted to be secured to the pool at a position overlying the port of the water circulation system. The coupler including an inner conduit which defines a water flow path between the water circulation pipe and the enclosure.
In accordance with a preferred method of installing pool purifier in a swimming pool, the pool having a water circulation system including a pipe which communicates with the pool through a port positioned beneath the level of water in the pool, a pool purifier is positioned beneath the surface of the pool water and in front of the port of the circulation system. An electrolytic cell of the pool purifier is attached to the pool in this position so that water from the pipe flows across the cell.
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Knobbe Martens Olson & Bear LLP
Valentine Donald R.
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