Humidifier conduit
US5640951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1995 |
| Grant date | Jun 24, 1997 |
| Priority date | — |
| Expiry date | Mar 15, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/911
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A humidifier conduit has an enclosed helical passageway in the wall thereof to provide an insulating barrier against heat transfer from the inside of the conduit to the outside of the conduit. The conduit may include at least one heating means hectically disposed between the inner wall and outer wall of the conduit to assist in the retention of a desired gases temperature in the humidified air flow which is to flow through the conduit in use. The conduit preferably is constructed by helical winding of a unit profile and bonding of adjacent turns of the helically wound profile to form the conduit, the unit profile including complementary connecting means so that adjacent turns of the helically wound profile are securely connected to form the conduit. The unit profile may include an overlapping member to overlap adjacent turns of the profile and act in an armadillo-like fashion to ensure flexibility of the conduit, while retaining the insulative properties of the double wall and enclosed helical passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.