US 5,600,752 AGranted

Flexible gas hose assembly with concentric helical tube members having reinforcement spring coils

AssigneeIndustrial Design Laboratories Inc.

InventorEdward Lopatinsky

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Abstract

A flexible hose assembly for conveying gas comprising an inner tube member having a reinforcing spring coil that selectively functions as an electric heater engaging the inner surface and an outer flexible tube member having its head and outlet ends closed upon those of the inner member. A second reinforcing spring coil surrounds the outer surface of the outer member such that a dead air space or insulating chamber is formed between the two flexible tubes. Superior insulation, flexibility, energy consumption, weight and strength characteristics are achieved. A temperature responsive electrical device can be mounted near the outlet end of the inside wall of the inner tube with leads extending through the hose exiting the head end for connection to a controller for controlling an external heating or cooling system or for controlling electric power applied to the inner spring coil for directly heating the flowing gas for delivering temperature controlled heated gas to the end user system. The air in the chamber can be less than one atmosphere to enhance the insulating function.

Claims21

Dependent claims

A flexible hose assembly for conveying gas comprising,

a flexible tube member having an inlet end and an outlet end for receiving, conveying, and delivering a gas flow,
a metal spring coil member arranged along a substantial length of said tube member and in substantial engagement with the inner surface thereof for providing axial and compression strength to said tube member,
said coil member being in direct contact with the gas flow throughout a substantial length of said tube member,
a temperature sensing device within said tube member and in direct contact with the gas flow for sensing the temperature of gas when flowing therein, and
means coupled to said device for transmitting from said device to apparatus external to the hose assembly signals indicative of the gas flow temperature, and
wherein said device is arranged near the outlet end of said tube member for sensing the gas temperature of the gas that is about to exit the hose assembly and said signals are indicative of the temperature of the gas that is about to exit the hose assembly, and
wherein said means for transmitting signals indicative of the gas temperature comprises electrical leads extending from said device longitudinally through said tube member and axially in contact with a surface of said tube member and adjacent the inlet end of said tube member for connection to apparatus external to the assembly, and
wherein said tube member comprises spiral undulations along its length and said leads are wrapped along said undulations.

5 more elements

Dependencies are inferred from the claim text.