Safety system for breathing apparatus
US4381774A · kind A · utility
7Cited by
6References
9Claims
0Family size
Inventors
Key dates
| Filing date | Dec 5, 1980 |
| Grant date | May 3, 1983 |
| Priority date | — |
| Expiry date | Dec 5, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/22
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety system for use in a breathing system of an anesthesia apparatus including a gas supply circuit and re-breathing or counter lung circuit. The safety system includes pneumatically operated switches, battery-powered monitoring circuitry and alarm circuitry. The alarm circuitry is coupled to the monitoring circuitry to provide an alarm signal in the event that gas pressure in the breathing circuit exceeds a threshold level for a predetermined period of time, irrespective of the mode of operation of the apparatus. The pneumatically operated switches are arranged to minimize battery drainage during operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.