Demand valve for breathing apparatus
US6772785B2 · kind B2 · utility
3Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2002 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Jun 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/777
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
There is described a demand valve for a breathing apparatus wherein a pilot jet of the demand valve is controlled by a pivoting lever resiliently held against a planar face in which the pilot jet is formed. The pilot jet is preferably formed in a land surface surrounded by a recessed area of the planar face, and opening of the pilot jet is effected by movement of a control projection mounted on the pivoting lever. The area of the control projection is preferably greater than the area of the land surface. A bypass arrangement for a demand valve is also disclosed
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.