Ventilation tubes
US8726901B2 · kind B2 · utility
27Cited by
23References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2006 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Jul 7, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/131
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.