Breathing mask with flow indicator for the respiration air
US5322059A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1992 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Dec 29, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A breathing mask with a fan for feeding respiration air into the interior space of the mask has a flow indicator for indicating a necessary respiration air flow at the air outlet end of the fan connection. In order for this indicator to be directly recognizable by the mask user in his field of vision, the opening of the air outlet end (4) shall be closed at least partially by a flow plate, which is movably mounted on a guide structure (11, 20) such that it emerges into the field of vision of the mask user in the presence of air flow, and guides the respiration air flow along the inner side of the window (10). If the respiration air flow is insufficient, the flap jumps back, and warning windows appear, instead, in the range of vision of the mask user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.