Liquid purification or separation – Flow – fluid pressure or material level – responsive – Check valve
Patent
1994-06-14
1996-12-10
McCarthy, Neil
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Check valve
210169, 2101981, 222630, 222637, C02F 150
Patent
active
055827187
ABSTRACT:
A liquid algaecide solution in a replaceable bottle is connected in a non-pressurized connection to the water recirculation line of the swimming pool; at the input side of the pump. A flow control unit and a siphon check valve unit in a feed line connects the bottom of the bottle to the recirculation line. The algaecide solution bottle is releasably coupled to the feed line for gravity flow. The control unit has a manual control to vary the flow rate and the check valve unit permits only flow into the recirculation line. The bottle is releasably mounted to a pipe of the recirculation line. Commercially available solution bottles have a thread output neck. The control unit has a threaded cap connected to the bottle neck, and the upper end of the bottle has a small opening for gravity flow therefrom. The control unit has a dial control valve for selectively opening a metered passageway for precise discharge of the liquid solution and a flexible line connects the control unit to the check valve unit. The check valve unit is spring-biased to a closed state, and responds to the recirculating water in the recirculation line to open for gravity flow of the algaecide liquid solution through the control valve and the check valve into the recirculation line. The check valve unit is secured by a pressure fit within a drilled opening and an encircling clamp unit, unit with a depending discharge pipe for siphoning of the liquid solution into the recirculating pool water.
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