Active walls
US6722365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2003 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Jan 7, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/0233
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A powder distribution device for transporting and mixing a fine powder with a gas is disclosed. The device presents a distribution member forming a connection between a source of fine powder and a discharge opening. The distribution member has a first inlet portion (10) and an outlet portion (12) for a stream of a first gas (1) mixed with the fine powder. The main body of the distribution member constitutes a porous body portion (16) being surrounded by a second gas (2). If a pressure gradient is created between the second gas (2) and the first gas (1), i.e. the first gas (1) being at a slightly lower pressure, the second gas (2) will leak trough the porous body (16) and thereby preventing powder, in the mix of the first gas and fine powder, from sticking or clogging within the distribution member, which thereby forms an active non-sticking wall relative to of the fine powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.