Fluid handling – Processes – Involving pressure control
Patent
1997-03-12
1998-11-03
Chambers, A. Michael
Fluid handling
Processes
Involving pressure control
137362, 137563, 13762412, 25112904, F16K 4900
Patent
active
058294678
ABSTRACT:
A residential hot water recirculation system recirculates cooled hot water into the base of the hot water heater through its drain valve using an electrically driven pump. The recirculation system incorporates portable self-contained signalling units which use photosensitive, motion sensitive or infrared sensitive detectors to sense changes within their field of sensitivity to signal the pump controller to activate the pump. By being portable and self-contained, the detectors can be placed without regard to home power outlets and without the need for additional wiring. The system provides for setting the cycle time for pump activation and the minimum interval between pump activations as well as a manual override which will reinitiates pump activation without regard to pump or timer status. The system signalling units and controller in one embodiment transmits and differentiates between two radio frequencies to distinguish between normal activation signals and manual override signals.
REFERENCES:
patent: 4142515 (1979-03-01), Skaats
patent: 4201518 (1980-05-01), Stevenson
patent: 4450829 (1984-05-01), Morita et al.
patent: 4606325 (1986-08-01), Lujan, Jr.
patent: 4750472 (1988-06-01), Fazekas
patent: 4936289 (1990-06-01), Peterson
patent: 4945942 (1990-08-01), Lund
patent: 5009572 (1991-04-01), Imhoff et al.
patent: 5042524 (1991-08-01), Lund
patent: 5105846 (1992-04-01), Britt
patent: 5143049 (1992-09-01), Laing et al.
patent: 5205318 (1993-04-01), Massaro et al.
patent: 5261443 (1993-11-01), Walsh
patent: 5277219 (1994-01-01), Lund
patent: 5351712 (1994-10-01), Houlihan
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