Respiratory heated face mask
US4793343A · kind A · utility
48Cited by
15References
16Claims
0Family size
Inventors
Key dates
| Filing date | Aug 20, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Aug 20, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A face mask for use in cold weather to supply warm air for inhalation by normal breathing to persons having respiratory and heart ailments to avoid the discomfort, pain and limited mobility caused by breathing cold air and to healthy people engaged in strenuous cold weather activities. The face mask has inlet and outlet check valves and a cold air intake chamber with an electric heater element therein which heats the cold air to supply warm air for inhalation. The heater element is preferably powered by a portable battery pack and controlled by electronic circuitry to maintain the heated air in a predetermined temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.