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US 5,859,411 AGranted
Compact immersion heater, particularly for aquariums
AssigneeHydor Srl
InventorsValerio Bresolin, Daniele Ragazzon
Life of this patent
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AssigneeHydor Srl
InventorsValerio Bresolin, Daniele Ragazzon
Estimating the term…
A compact immersion heater, for aquariums, includes: a watertight tubular container (2); an electric heating component (4); an adjustable thermostat (3); an electric circuit (6, 7, 8, 9) for connecting the heating component, arranged in series to the thermostat, to an external electric power source. The heating component is mounted in a radially offset and longitudinally superimposed position with respect to the thermostat and is accommodated in a torus-like gap formed between the thermostat and the inside surface of the container. The heating component is a resistive component having a laminar structure formed by a layer (16) of an electrically resistive material that is anchored to an electrically insulating and heat-resistant flexible laminar support (15). The layer of resistive material is a PTC ink that is printed onto the support in selected regions (17) that are connected to paths that conduct the electric power supply, directly face the sensitive part of the thermostat, and are adjacent to it.
A compact immersion heater, particularly for aquariums, comprising a watertight tubular container that internally accommodates an electric heating component and a single thermostat, both of which extend longitudinally, an electric circuit for serially connecting said heating component and said thermostat to an external electric source, means for adjusting said thermostat from the outside of said tubular container, said heating component being a resistive component with an essentially laminar structure, characterized in that said heating component and said thermostat have substantially the same length that is at least a substantial portion of the length of said container, said heating component being arranged in a substantially torus-like gap formed between said thermostat and the inside surface of said container and being radially offset and longitudinally superimposed to said thermostat, said heating component being at least partially curled around said thermostat so as to face the inside cylindrical surface of said container.
Dependencies are inferred from the claim text.