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US 4,395,620 AGranted
Electric storage heating apparatus
OwnerRobert A. Clyde, William B. Crandallinventors
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OwnerRobert A. Clyde, William B. Crandallinventors
Estimating the term…
An electric heat storage apparatus comprises an electric heating element, a ceramic heat storage pipe, an air passageway in communication with the pipe, and a thermostatically controlled air circulation means. The ceramic pipe has a scalloped-shaped outer surface providing a plurality of crests and troughs and a series of parallel grooves cut in at least some of the crests. The heating element is located in the grooves in contact with the pipe. In a preferred embodiment, the pipe is provided with a plurality of internal ribs of at least two different lengths. The pipe is supported on a ceramic cradle and a ceramic sponge or metal turnings are inserted into the pipe between the ribs to increase the heat transfer area.
In an electric heat storage apparatus having (1) an electric heating element, (2) a heat storage core, (3) an air passageway in communication with the core, and (4) thermostatically controlled air circulation means, the improvement wherein said heat storage core comprises a ceramic pipe having a scallop-shaped outer surface providing a plurality of crests and troughs and a series of parallel grooves cut in at least some of the crests, and said heating element is located in said grooves in contact with said pipe.
An electric heat storage apparatus comprising:
Dependencies are inferred from the claim text.