Timed water recirculation system

Details Timed water recirculation system Timed water recirculation system

1977-08-22

1979-03-06

Freeh, William L.

Stoves and furnaces

Liquid heater

Boiler receiving hot liquid or steam from stove or furnace

417 12, F24H 100, F04B 4900

Patent

active

041425154

ABSTRACT:
Apparatus for effecting a timed recirculation of the hot water in a water distribution network such as for an apartment complex. A recirculating pump is responsive to a drop in pressure in the hot water output line of a water heater and provides recirculation of the water in the hot water lines from the remote apartment locations for a timed interval. After the timed interval, and after the system has returned to the starting pressure, the recirculating pump is again ready for operation at the time of the next use of the hot water in the system.

REFERENCES:
patent: 1780379 (1930-11-01), Durdin, Jr.
patent: 2535752 (1950-12-01), O'Connell
patent: 2827912 (1958-03-01), Lung
patent: 2948277 (1960-08-01), Dennis
patent: 2983487 (1961-05-01), MacKay
patent: 3123065 (1964-03-01), Conley
patent: 3499423 (1970-03-01), Phlaum
patent: 3663831 (1972-05-01), Cook
patent: 3870228 (1975-03-01), Mosely
patent: 3885584 (1975-05-01), Hock
Publication by O-E Specialty Manufacturing Co., patented O-E Venturi Hot Water Circulation Fitting published approximately 1928.

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