Automatic flushing device

Details Automatic flushing device Automatic flushing device

1994-09-26

1996-01-09

Schwadron, Martin P.

Valves and valve actuation

Electrically actuated valve

Remote or follow-up control system for electrical actuator

4304, 4623, E03D 510

Patent

active

054822505

ABSTRACT:
There is provided a device attached to the flush valve of an existing stool and adapted for automatically carrying out flushing. This automatic flushing device comprises: a first sensor section for detecting approach and withdrawal of the human body; a second sensor section having a predetermined sensing range and operative to output a detection signal when a portion of the human body exists within the sensing range; a signal processing circuit operative to output a drive signal when the first sensor section detects withdrawal of the human body after more than a predetermined time is passed from the time point when the first sensor section detects approach of the human body, or when the second sensor section outputs the detection signal; an electromagnetic valve mechanism for opening an electromagnetic valve when the drive signal is outputted from the signal processing circuit; and attachment means adapted for accommodating the first and second sensor sections, the signal processing circuit and the electromagnetic valve mechanism, and for attaching them to an existing flush valve.

REFERENCES:
patent: 4624017 (1986-11-01), Foletta
patent: 5063955 (1991-11-01), Sakakibara
patent: 5187816 (1993-02-01), Chiou
patent: 5224685 (1993-07-01), Chiang et al.

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