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US 5,932,129 AGranted
Thermal retention device
AssigneeVesture Corporation
InventorGary F. Hyatt
Life of this patent
Estimating the term…
Abstract
A heat retention device is disclosed in the form of a heating pad which includes an electrically resistive coil contained within a volume. The coil terminates at an electric coupler which is external of the volume. A heat retention mass is contained within the volume in thermal conductivity with the resistive element.
Claims13
A heat retention device comprising:
- (a) a plastic construction defining a closed internal volume;
- (b) a paraffin containing heat storage material provided within said plastic construction;
- (i) said paraffin containing heat storage material provided for storing sensible and latent heat;
- (c) an electrically resistive heating element provided within said plastic construction and positioned in thermally conductive contact with said paraffin containing heat storage material;
- (i) said heating element being selectively controllable, upon direction of electric current therethrough, to heat said paraffin containing heat storage material to a temperature sufficient to store sensible and latent heat;
- (d) a thermal switch arrangement constructed and arranged to control heating of said electrically resistive heating element in response to a sensed temperature of said paraffin containing heat storage material;
- and,
- (e) a covering defining a covering internal volume including said plastic construction provided therein;
- (i) said covering having at least one end which is selectively openable and closable for selected access to the covering internal volume;
- (f) a power cord and plug arrangement extending out from said plastic construction;
- said power cord and plug arrangement being in electrically conductive communication with said electrically resistive heating element.
8 more elements
Dependencies are inferred from the claim text.