Liquid purification or separation – With alarm – indicator – register – recorder – signal or...
Patent
1991-09-24
1992-12-22
Dawson, Robert A.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
210 89, 210 94, 210138, 137801, 25112904, B01D 35157
Patent
active
051731789
ABSTRACT:
An under-sink type water purifier with a water-tap portion connected to a purified-water outlet of the purifier having a sensor for sensing an object to issue a signal, and a solenoid valve for starting and stopping the discharge of purified water from the water-tap portion in response to the signal. The apparatus is characterized by a control circuit for opening and closing the valve in response to the signal. The circuit is provided with at least one of a first timer for opening the valve at every preset time for a short time, and a second timer for opening the valve for a short time to permit the water-tap portion to discharge the purified water therefrom when the purified water remains confined in the purifier for a predetermined period of time. These timers are selectively used in operation.
REFERENCES:
patent: 3505692 (1970-04-01), Forbes
patent: 4520516 (1985-06-01), Parsons
patent: 4823414 (1989-04-01), Piersimoni et al.
patent: 4893039 (1989-06-01), Parsons et al.
patent: 4925551 (1990-05-01), Lipshultz et al.
patent: 5063955 (1991-11-01), Sakakibara
Kawashima Eiichi
Shinozaki Kyohei
Dawson Robert A.
Drodge Joseph
Osaki Electric Co. Ltd.
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