Respirator negative pressure fit check devices and methods
US9950202B2 · kind B2 · utility
4Cited by
100References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2013 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Aug 23, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A respiratory mask body defining a breathable air zone for a wearer and having a shut-off valve is provided. In an exemplary embodiment, the mask body includes one or more inlet ports configured to receive one or more breathing air source components. The shut-off valve is operable between a closed position and an open position, and when in a closed position the shut-off valve prevents fluid communication between the one or more inlet ports and the breathable air zone and the shut-off valve returns to an open position in the absence of an applied force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.