Inhalation device for producing a drug aerosol
US7913688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2003 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | May 20, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M11/047
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for delivering a drug by inhalation is disclosed. The device includes a body defining an interior flow-through chamber having upstream and downstream chamber openings, and a drug supply unit contained within the chamber for producing, upon actuation, a heated drug vapor in a condensation region of the chamber. Gas drawn through the chamber region at a selected gas-flow rate is effective to form drug condensation particles from the drug vapor having a selected MMAD between 0.02 and 0.1 MMAD or between 1 and 3.5 μm. A gas-flow control valve disposed upstream of the unit functions to limit gas-flow rate through the condensation region to the selected gas-flow rate. An actuation switch in the device activates the drug-supply unit, such that the drug-supply unit can be controlled to produce vapor when the gas-flow rate through the chamber is at the selected flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.