Measuring and testing – Volume or rate of flow – By measuring transit time of tracer or tag
Patent
1991-08-20
1992-07-21
Sever, Frank
Measuring and testing
Volume or rate of flow
By measuring transit time of tracer or tag
7386154, 210 87, 210 97, G01F 122, G01F 140
Patent
active
051312778
ABSTRACT:
A reverse osmosis system includes a sediment filter which cleans feed water from a source and from which that feed water is fed to a reverse osmosis membrane filter. Permeate from the latter is fed to a bladder within a storage tank. Concentrate from the membrane filter is fed to and used within the storage tank as squeeze water for the bladder. When a faucet that delivers permeate to the user is open, squeeze water is used to cause permeate to flow out of the storage tank through an impurity filter to supply the faucet. A valve unit is included to control the amount of squeeze water fed to the storage tank and to regulate permeate flow so that the water outletted from the faucet remains at a constant pressure and provides relief as against overpressure in the system. A proportioning valve within the valve unit serves to maintain at all times a constant ratio of concentrate to permeate flow through the membrane filter for adequate cleansing of the membrane. Also included are input-side and output-side flow monitors which provide signals to a processor that serves to indicate the status of filter conditions. There also is an advantageous faucet assembly for controlling the delivery of permeate to the user with flexibility and convenience.
REFERENCES:
patent: 4462262 (1984-07-01), Kahnke
patent: 4787253 (1988-11-01), de Fasselle et al.
Birdsong Thomas E.
Mork Steve O.
Peace Steven L.
Drake Hugh H.
Sever Frank
Teledyne Industries Inc.
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