Anaesthetic vaporizer
US4444182A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1981 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Aug 27, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0753
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An anaesthetic vaporizer of the by-pass type has a sump 7 with an outlet flow path comprising a first run 27 leading upwardly, a second run 30 leading downwardly and a third run 32 leading upwardly again. A duct 23 connects the lower end of the run 30 with the lower part of the sump and in normal operation is sealed by the sump liquid. However, if the vaporizer is displaced such that the liquid flows from the sump into runs 27 or 30 of the outlet flow path the liquid inevitably drains from the duct 23. A flow path for inflowing gas is thereby opened directly to the downstream end of the run 30, preventing the over-administration of vapor from the device and removing any danger of liquid anaesthetic being blown through the device from the runs 27 and 30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.