Pressure demand regulator with automatic shut-off
US4345592A · kind A · utility
41Cited by
12References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1980 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Sep 10, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7785
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A pressure demand breathing apparatus having a facemask connected through a pressure demand regulator with a shut-off device that operates automatically to interrupt the supply of air to the mask when the facemask is removed. The device operates with a time delay to permit momentary user-induced high flow rates without interrupting the supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.