Frigid air respirator
US4245631A · kind A · utility
Inventors
Key dates
| Filing date | Jun 1, 1979 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Jun 1, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/025
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A frigid air respirator comprising a cylindrical housing affixed to a face mask, openly constructed so as to permit the passage of air upon inhalation by the user into the chamber formed by the housing. A heating means is situated within the housing to increase the temperature of incoming air by radiation and a transversely positioned intake valve governs the admission of air into the respiratory tract of the user and divides the chamber formed by the housing into an internal chamber which is contiguous with the mask cavity and into a receiving chamber wherein a supply of previously heated air is stored prior to inhalation. An exhaust valve is encompassed into the device to allow the expulsion of air from the internal chamber and mask cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.