Delivery devices
US7934503B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2003 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Apr 8, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2202/30
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A delivery device for and method of delivering substance, the delivery device comprising: a delivery outlet (7) from which substance (S) is in use delivered; a gas chamber (17) containing a gas and being of reducible volume, wherein a reduction in the volume of the gas chamber (17) to a predeterminable volume acts to pressurize the contained gas to a predeterminable pressure; a seal element (11) disposed between the gas chamber (17) and the delivery outlet (7); and an opening mechanism configured, on reduction of the volume of the gas chamber to a predeterminable volume, to open the seal element (11), whereupon a gas flow from the gas chamber (17) acts to deliver substance (S) from the delivery outlet (7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.