Solar heated vacuum flask

Stoves and furnaces – Tool having fluid fuel burner – Curling iron

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Details

206543, 215 13R, 220403, 220420, 220454, 222465, 2483111R, 248455, A47J 4102, F24J 302

Patent

active

041967216

ABSTRACT:
The wall of a protective jacket of a vacuum flask, containing a double-walled vessel whose walls are permeable to solar radiation, includes parts capable of being swung open. These parts and a wall part situated between them each have a reflective coating. The reflective surfaces of these coatings, viewed in cross-section, extend along a parabola when the movable wall parts are opened out, so that incident solar radiation is collected in the core zone of the vessel. A solar-radiation absorbing member may be disposed in this core zone, e.g., a metal tube having a black outer surface. Liquid contents of such a vacuum flask can be heated by means of solar energy.

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patent: 4034926 (1977-07-01), Wegner
patent: 4054256 (1977-10-01), Buck, Jr. et al.
patent: 4119085 (1978-10-01), Knowles

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