Ultrasonically operated water faucet

Details Ultrasonically operated water faucet Ultrasonically operated water faucet

1981-03-26

1983-09-06

Artis, Henry K.

Baths, closets, sinks, and spittoons

Wash receptacles

With proximity operated valve

4305, 4302, 4DIG3, E03C 105

Patent

active

044020953

ABSTRACT:
A water faucet is disclosed that is automatically turned on and off in response to the proximity of the user's hand or other object to the faucet. An ultrasonic transducer is located in the faucet near the water outlet and transmits bursts of ultrasonic waves. When a wave reflects off a user's hand and creates an echo signal, the echo is detected by the ultrasonic transducer. Circuitry connected to the ultrasonic transducer determines when an object is within a predetermined distance of the faucet by measuring the time elapsed between the transmission of the burst and the reception of the echo. Once an object is within this predetermined distance, the circuitry causes a valve to open and water is supplied by the faucet.

REFERENCES:
patent: 3415278 (1968-12-01), Yamamoto et al.
patent: 3487477 (1970-01-01), Classen
patent: 3505692 (1970-04-01), Forbes
patent: 3576277 (1971-04-01), Blackmon
patent: 3613124 (1971-10-01), Ichimori et al.
patent: 3724001 (1973-04-01), Ichimori et al.
patent: 4141091 (1979-02-01), Pulvar
patent: 4309781 (1982-01-01), Lissau

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