External water tower

Details External water tower External water tower

1986-06-03

1987-05-12

Chambers, A. Michael

Fluid handling

Systems

With pump

137592, 13762415, 13762420, 417 12, 417 28, F04B 4900

Patent

active

046641432

ABSTRACT:
A water supply recirculation system is provided having a recirculation pump and a duct into which the recirculation pump propels water. A selectively operated, closed at rest, flow valve is maintained open while the pump operates. A flow sensor serially installed in the recirculation duct detects flow and senses a failed condition. A second control valve which rests in an open position selectively prevents passage of water from the recirculation duct into a drain duct when pumping is in progress. The recirculation duct transmits water into a water supply tank and discharges it onto the central surface of the water supply in the tank. When pumping ceases, the first control valve closes, and the second control valve opens, allowing water in the duct to drain from the duct.

REFERENCES:
patent: 2128617 (1938-08-01), Lawlor
patent: 3812872 (1974-05-01), Block et al.
patent: 3957395 (1976-05-01), Ensign
patent: 4034421 (1977-07-01), Pihl et al.
patent: 4249565 (1981-02-01), Brust
patent: 4481966 (1984-11-01), Anderson

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