Insulated breathing tube
US5377670A · kind A · utility
Inventor
Key dates
| Filing date | Jun 19, 1992 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | Jun 19, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/912
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides an insulated breathing tube arrangement to prevent heat loss from the inhalant gas in a recirculatory aided breathing circuit thereby reducing internal vapor condensation commonly associated with such breathing circuits while also stabilizing the relative temperature and humidity within such breathing circuits. The insulated breathing tube arrangement includes a thin flexible partially longitudinally compressed casing surrounding a thicker corrugated tube. The thin casing allows for hairpin bending of the breathing tube arrangement and provides an insulating dead air space around the corrugated tube. In another arrangement selected enlarged corrugations are provided in spaced relation along the corrugated tube to engage the inner surface of the casing in a preselected spaced arrangement with respect to said corrugated tube to compartmentalize insulating dead air spaces between the tube and the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.