Respiratory system and method of use
US7328700B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2003 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Dec 10, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/063
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A respiratory protection circuit of the type having an air flow regulator disposed in an air flow path between an air supply and a respirator is improved by including an air flow splitter and a bi-directional valve. The air flow splitter is disposed in the air flow path upstream from the air flow regulator, the splitter dividing the air flow path into first and second downstream flow paths, with the first downstream flow path leading to the respirator. The bi-directional valve is disposed in the second downstream flow path wherein the bi-directional valve prevents excessive downstream air flow therethrough and prevents upstream air flow therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.