Flexible liner air gap pipe
First Claim
Patent Images
1. A bendable, multiple wall air gap pipe apparatus comprising:
- a rigid tube defining a rigid first wall;
at least one elongated profile member defining a flexible second wall;
said first and second walls having unequal diameters, one being disposed within the other;
said air gap pipe being bendable on conventional single wall tube bending apparatus.
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Accused Products
Abstract
A multiple wall air gap pipe includes a rigid tube wall and at least one flexible tube wall defined by two or more overlapping profiles in wound, interlocking configurations. The multiple wall air gap pipe can be bent on conventional single wall pipe bending apparatus, inexpensively, while retaining the benefits of multiple wall air gap pipes.
107 Citations
38 Claims
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1. A bendable, multiple wall air gap pipe apparatus comprising:
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a rigid tube defining a rigid first wall;
at least one elongated profile member defining a flexible second wall;
said first and second walls having unequal diameters, one being disposed within the other;
said air gap pipe being bendable on conventional single wall tube bending apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification