Gas cylinder warmer with variable wattage self regulating heater
First Claim
1. A gas cylinder warmer comprising, in combination:
- first and second layers;
a plurality of electric, self-regulating heating elements positioned between the first and second layers;
wherein a first one of the heating elements produces a higher temperature than a second one of the heating elements;
wherein the heating elements are formed by a self-regulating heating cable; and
wherein the self-regulating heating cable forms a higher watt density at the first one of the heating elements than at the second one of the heating elements.
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Accused Products
Abstract
A gas cylinder includes a cylindrically-shaped main wall having a liner, a facing and insulation located between the liner and the facing. First and second electric, self-regulating heating elements are positioned between the liner and the insulation. The liner is provided with first and second pockets and the first and second heating elements are located within the pockets. The first heating element has a higher wattage density than the second heating element and the first heating element is located below the second heating element. A sealed conduit enclosure contains a terminal block connecting a power input cable to the first and second heating elements. A planar top wall is located at the top of the main wall and has an opening for passage of a regulator of the gas cylinder.
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Citations
18 Claims
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1. A gas cylinder warmer comprising, in combination:
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first and second layers; a plurality of electric, self-regulating heating elements positioned between the first and second layers; wherein a first one of the heating elements produces a higher temperature than a second one of the heating elements; wherein the heating elements are formed by a self-regulating heating cable; and wherein the self-regulating heating cable forms a higher watt density at the first one of the heating elements than at the second one of the heating elements. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A gas cylinder warmer comprising, in combination:
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first and second layers; a plurality of electric, self-regulating heating elements positioned between the first and second layers; wherein a first one of the heating elements produces a higher temperature than a second one of the heating elements; and wherein the first layer is provided with a plurality of pockets and the heating elements are located within the pockets.
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8. A gas cylinder warmer comprising, in combination:
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first and second layers; a plurality of electric, self-regulating heating elements positioned between the first and second layers; wherein a first one of the heating elements produces a higher temperature than a second one of the heating elements; and a gas-tight enclosure containing an electrical connection between a power input cable and the heating elements.
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9. A gas cylinder warmer comprising, in combination:
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a cylindrically-shaped main wall including a liner, a facing and insulation located between the liner and the facing; at least one electric, self-regulating heating element positioned between the liner and the insulation; and a planar top wall located at the top of the main wall and having an opening for passage of a gas cylinder regulator. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A gas cylinder warmer comprising, in combination:
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a cylindrically-shaped main wall including a liner, a facing, and insulation located between the liner and the facing; first and second electric, self-regulating heating elements positioned between the liner and the insulation; wherein the liner is provided with first and second pockets and the first and second heating elements are located within the pockets; wherein the first heating element has a higher wattage density than the second heating element; wherein the first heating element is located below the second heating element; a gas-tight enclosure containing an electrical connection between a power input cable and the first and second heating elements; and a planar top wall located at the top of the main wall and having an opening for passage of a gas cylinder regulator. - View Dependent Claims (18)
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Specification