Water filter
AssigneeWater Soft, Inc.
InventorsJames W. Chandler, William D. Chandler
Life of this patent
Estimating the term…
Abstract
A water filter adapted for installation in the hot and cold water supply lines leading to a faucet, appliance or the like includes a housing containing a granular activated carbon filtration bed and a two position valve with three ports for controlling water flow through the filtration bed. The valve has a first service position for normal flow of cold water through the filtration bed to the effluent line from the water filter and a second backwash position for flow of hot water through the filtration bed in an opposite direction to then drain through the same effluent line.
Claims19
A water filter adapted to have water move therethrough comprising a housing containing a filtration bed and valve means having three ports only mounted on said housing to control water flow through the housing and filtration bed, said valve means having a first inlet port, a second inlet port and a third effluent port, said valve means being movable between two positions, the first position of the valve means directing water through the first inlet port, through the filtration bed in a first direction and then through said effluent port to provide filtered water for use and the second position of the valve means directing water through the second inlet port, through the filtration bed in a second opposite direction and then through said effluent port for drainage.
A water filter adapted to be installed in separate cold and hot water supply lines comprising a housing containing a granular activated carbon filtration bed, valve means on said housing to control water flow through said filtration bed, said valve means including a valve body and a movable valve disk cooperating with said valve body, said valve body having three ports only, the first port being adapted for connection to and positioning in said cold water supply line, the second port being adapted for connection to a branch of the hot water supply line and the third port being adapted for connection to an effluent water line leading from the housing, said valve disk having flow control means therein selectively cooperating with said three ports to permit cold water from the cold water line to flow through the filtration bed in one direction and then out the effluent water line when said valve disk is in a first position for service and alternatively to permit hot water from the hot water branch to flow through the filtration bed in an opposite direction and then out the effluent water line when said valve disk is moved to a second position for backwashing.
Dependencies are inferred from the claim text.