Breath responsive powered air-purifying respirator
US8069853B2 · kind B2 · utility
19Cited by
14References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 2007 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Jul 4, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/8206
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for regulating the airflow to a closed environment using feedback control for the position of a control valve and blower speed. The system provides a control apparatus that regulates airflow to a closed environment, such as the mask of a breathing apparatus, to ensure sufficient breathing air for a wearer of such mask. In order to provide fast response to a change in condition in the breathable environment, the airflow regulator includes a valve control and a blower control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.