Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kumaraguru Muthuswamy0
Surinderjit Kumar Jassell0
Date of Patent
May 20, 2014
0Patent Application Number
120905720
Date Filed
October 20, 2006
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A ventilation tube (20, 120, 220) is disclosed. The ventilation tube (20, 120, 220) comprises an inner wall (22, 122, 222) that defines a fluid passageway for 5 ventilation gases, an outer wall (24,124,224) that surrounds the inner wall (22, 122, 222) and has a greater thickness than the inner wall (22, 122, 222), a helical separator member (26, 126, 226) interposed between the inner and outer walls (22, 122, 222, 24, 124, 224) so as to define an insulation chamber between the inner and outer walls (22, 122, 222, 24, 124, 224), and a heating element (28, 128, 228) disposed within the insulation chamber.
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