Alarm system for respirator apparatus and method of use
US4674492A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1986 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Jul 25, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B9/006
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The alarm system of the present invention includes a pressurized air source for the purpose of pressurizing a face mask which surrounds the mouthpiece of respirator apparatus. An alarm indicating device is installed in the air line between the pressurized air source and the face mask. If the face mask is leaking air to outside the space enclosed by it, the alarm will indicate a continuous flow. If there is leakage from the space enclosed by the face mask into the mouthpiece, the alarm will indicate intermittent leakage since the placement of air will flow only during inhalation. The wearer of the apparatus may thus be confident that either no leakage is occurring or that there is leakage and that appropriate corrective measures should be taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.