Radial blower with shaped scroll profile
US8667960B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2011 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Dec 16, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/045
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A powered air purifying respirator (PAPR) includes a radial blower. The radial blower includes at least an impeller and a scroll having an upper outer surface and a lower outer surface. In one embodiment, a cross section of an air passageway of the scroll includes sides corresponding to the upper outer surface and the lower outer surface, the sides having parallel slanted segments. In another embodiment, the sides may be substantially parallel and may be curved. In yet another embodiment an upper outer surface of the scroll is concave and a lower outer surface of the scroll is convex. In that embodiment, the PAPR further includes an inlet, and the inlet is disposed at the lower outer surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.