Air supply units
US4320755A · kind A · utility
20Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1980 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Jul 18, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/35
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A main casing 34 contains a centrifugal fan 10, a filter unit 12 upstream, and a duct 14 downstream for guiding air to a face mask. There is a center plate 36 to which a motor 18, the fan 10, a battery 20 etc. are secured. A back plate 32 is removable to provide access to the electrical components. The filter unit 12 is held in position by an apertured cap 24.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.