Stoves and furnaces – Tool having fluid fuel burner – Curling iron
Patent
1977-10-12
1980-01-15
Vrablik, John J.
Stoves and furnaces
Tool having fluid fuel burner
Curling iron
418 15, 418266, F24J 302, F04C 100, F04C 1100, F04C 1300
Patent
active
041833520
ABSTRACT:
A pump for circulating water between a low-cost thin-walled foil or plastic solar heat collector or panel operating at about atmospheric pressure, and a hot-water tank operating at water mains pressure. No heat exchanger is used. The tank may be an ordinary hot water heater. The positive-displacement pump is desirably of the rotary vane type, and has two equal pumping chambers sealed off from each other. The vanes or pistons sweep through one chamber to move water from the tank to the solar panel, and reversely through the other chamber to move heated water back from the collector outlet to the tank. During their passage, "packets" or quantities or volumes of water are momentarily isolated by the vanes so that the mains pressure is never communicated to the thin solar panel. Torques or forces imparted to the vanes by the mains pressure are balanced out; hence the pump needs only enough input power to overcome frictional and viscous losses.
REFERENCES:
patent: 2330565 (1943-09-01), Eckart
patent: 2904012 (1959-09-01), Hazen
patent: 2969637 (1961-01-01), Rowekamp
patent: 3788770 (1974-01-01), Johnson et al.
Fleming Lawrence
Vrablik John J.
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