Liquid level controller

Details Liquid level controller Liquid level controller

2005-06-28

2005-06-28

Lee, Kevin (Department: 3753)

Fluid handling

Liquid level responsive or maintaining systems

Electrical characteristic sensing

C137S386000, C004S508000, C073S305000, C073S313000, C340S623000, C340S624000

Reexamination Certificate

active

06910498

ABSTRACT:
A liquid level control system for detecting and responding to changes in the level of liquid in a container. The system includes a transmitter in radio communication with a receiver, which is in turn connected to a valve assembly. The transmitter unit is programmable to respond to changes in the level of liquid in a container and to emit a radio signal receivable by the receiver unit, which controls the release of liquid to the liquid container via the valve assembly. The signal may be suppressed by a timing circuit in the transmitter circuitry unless and until a liquid level change is sufficiently sustained. The receiver is also programmable to keep the liquid control valve open a predetermined amount of time or to close the valve upon receipt of a high liquid level signal.

REFERENCES:
patent: 5660334 (1997-08-01), Trusty et al.
patent: 5878447 (1999-03-01), Mogab et al.
patent: 6067854 (2000-05-01), Yang
patent: 6229448 (2001-05-01), Bennett et al.
patent: 6276200 (2001-08-01), Cazden
patent: 6502461 (2003-01-01), Keller
patent: 6718567 (2004-04-01), Gibson et al.

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