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US 4,727,241 AGranted
Radiant electric heaters incorporating microporous thermal insulation
AssigneeMicropore International Limited
InventorJoseph A. McWilliams
Life of this patent
Estimating the term…
Abstract
A radiant electric heater has a support which bears a layer of microporous thermal insulation material such as that sold under the registered trademark "Microtherm" with a heat transmissive cover spaced from the layer by a peripheral wall and heating elements positioned within an area defined by the peripheral wall and coiled around a plurality of quartz tubes. The quartz rods are urged against the layer of microporous thermal insulation material by the cover by way of the peripheral wall.
Claims5
A radiant electric heater which comprises:
- a layer of microporous thermal insulation material;
- a support for the insulation material;
- a radiation transmissive cover;
- a heating element arranged between the cover and the layer of microporous thermal insulation material;
- a peripheral wall of insulation material extending around the heating element;
- radiation transmissive supporting means for supporting the heating element within an area defined by the peripheral wall;
- and
- means for transmitting a biasing force from the radiation transmissive cover to the layer of microporous thermal insulation material so as to urge the layer within an area defined by the peripheral wall towards the support.
5 more elements
Dependencies are inferred from the claim text.