# US 4,691,732 A · Pool chlorinator

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- Number: US 4,691,732 A
- Document ID: US4691732A
- Status: Granted
- Kind: A
- Application number: 06/892,037
- Filed: 1986-08-01
- Granted: 1987-09-08
- Earliest claimed: 1986-08-01
- Assignees: Jandy Industries
- Inventors: Bruce R. Johnson; Ralph A. Falconer
- Web page: https://patentgrep.com/patent/US4691732A

## CPC

- C02F 1/688: {Devices in which the water progressively dissolves a solid compound}
- B01F 21/22: {using additional holders in conduits, containers or pools for keeping the solid material in place, e.g. supports or receptacles}
- B01F 25/316: with containers for additional components fixed to the conduit
- C02F 2103/42: from bathing facilities, e.g. swimming pools
- Y10T 137/4891: With holder for solid, flaky or pulverized material to be dissolved or entrained
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## 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.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The chemical dispenser defined by claim 1 wherein said sealing means comprises:
a sealing lip around the top of each of said seal members to engage around said inner wall of the receptacle.

### Claim 3 (depends on 1)

The chemical dispenser defined by claim 1 wherein said sealing means comprises:
a stack of collars in said receptacle;
an upper annular lip around each of said collars to engage and seal around said inner wall; and
a lower lip around each of said collars to engage around a tablet.

### Claim 4 (depends on 1)

The chemical dispenser defined by claim 1 wherein said sealing means comprises:
a cylindrical cup to receive each chemical tablet in a stack thereof;
an opening through the bottom of said cup;
an outer seal lip around the rim of said cup to engage and seal around said inner wall; and
an inner lip around said opening to engage and seal against a tablet in said cap.