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US 4,691,732 AGranted
Pool chlorinator
AssigneeJandy Industries
InventorsBruce R. Johnson, Ralph A. Falconer
Life of this patent
Estimating the term…
Abstract
There is disclosed a device for dispensing a chemical wherein a stack of dry chemical tablets are contained within a receptacle. Sealing means are provided to seal around each tablet and the inner wall of the canister so that only the upper surface of the top tablet is exposed to the circulating water. The tablets are not exposed to the flowing water until the tablets above have been eroded away successively to provide leak paths around them.
Claims4
A chemical dispenser for a pool or spa comprising:
- a receptacle receiving a stack of dry, soluble chemical tablets;
- coupling means on said receptacle adapted for connection into a water circulation line;
- inlet and outlet ducts for introducing water from said coupling means into said receptacle at one end of said receptacle and for returning water from said one end to said coupling means;
- and
- sealing means comprising a plurality of annular seal members, each engaging around and between one of said chemical tablets in said stack thereof and the inner wall of said receptacle to prevent flow of water from said one end of the receptacle past that tablet closest thereto.
2 more elements
Dependencies are inferred from the claim text.