Baths – closets – sinks – and spittoons – Flush closet – With automatic flush responsive means
Patent
1991-11-20
1993-02-23
Phillips, Charles E.
Baths, closets, sinks, and spittoons
Flush closet
With automatic flush responsive means
4304, E03D 510
Patent
active
051878160
ABSTRACT:
A water and energy efficient automatic flushing device is used to control water flow from a water inlet pipe to a flushing conduit of a plumbing fixture, such as a toilet bowl. The automatic flushing device includes an electromagnetic valve unit and a control unit to control opening and closing action of the electromagnetic valve unit. The control unit includes a programmed central processing unit (CPU), a transmitter circuit, a detecting unit to detect the presence of a person using the plumbing fixture, a receiver circuit and a valve control circuit. The valve control circuit opens the valve unit to initiate a first flushing action after confirming that the plumbing fixture is in use, and to initiate a second flushing action after verifying that the person using the plumbing fixture has departed. The receiver circuit can distinguish if a received signal was reflected by a person using the plumbing fixture or by a hand that was placed directly in front of the detecting unit. Upon confirmation that the received signal was reflected by a hand, the CPU actuates the valve control circuit so as to open the valve unit and initiate a hand activated flushing action. The valve unit is closed and flushing is terminated when the hand is removed from the detecting unit.
REFERENCES:
patent: 4707867 (1987-11-01), Kawabe et al.
patent: 4793588 (1988-12-01), Laverty
patent: 4989277 (1991-02-01), Tsutsui et al.
Chen Chi Electro Chemical Co., Ltd.
Phillips Charles E.
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