Gas flow units
US5520168A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Mar 28, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/186
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An anaesthetic vaporizer includes a concentration dial for controlling the concentration of anaesthetic leaving the vaporizer. The vaporizer is adapted to be mounted on a back bar of an anaesthesia machine. An exclusion pin is mounted adjacent the back bar and forms part of an interlock system for preventing rotation of the concentration dial when a second vaporizer is also mounted on the back bar and is dispensing anaesthetic vapor. A button assembly is mounted on the concentration dial and must be depressed before the concentration dial can be rotated. The button assembly incorporates an overload device which, if excessive force is applied to the button assembly in order to override the effect of the exclusion pin will render the button assembly inoperative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.