Pneumatic actuated switch for hot water dispenser

Details Pneumatic actuated switch for hot water dispenser Pneumatic actuated switch for hot water dispenser

1988-06-23

1990-03-27

Rolla, Joseph J.

Dispensing

Combined

2221462, 137216, 251 57, B67D 506

Patent

active

049113356

ABSTRACT:
A combined air gap and dispensing device is adapted to be mounted on a sink, and comprises an internal air gap between inlet and outlet waste tubes. A liquid carrying pipe, such as a hot water pipe, also extends through the device to a faucet for being dispensed. A pair of fiber optic cables have exposed ends at the upper end of the device, and are coupled to a control system for valving liquid to the dispensing pipe. The control circuit may include a light source directed to one of the fiber optic cables, a photo sensor connected to the fiber optic cable to receive reflected light, and amplifying and demodulating circuitry, as well as a logic circuit responsive to determined conditions at the upper ends of the fiber optic cables for controlling the flow of liquid to the dispensing pipe. A pneumatic tube and pneumatic actuator may be provided instead of the optic cables and associated optic devices.

REFERENCES:
patent: 3620241 (1971-11-01), Brown
patent: 3638680 (1972-02-01), Kopp
patent: 3967638 (1976-07-01), Tondreau
patent: 4399832 (1983-08-01), Appleby
patent: 4454891 (1984-06-01), Dreibelbis et al.
patent: 4635673 (1987-01-01), Gerdes
patent: 4771485 (1988-09-01), Traylor

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