In metering valves for pressurised dispensing containers
US7959042B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2005 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Aug 6, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86919
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A metering valve used with a pressurized dispensing container, the metering valve has a valve stem assembly that slides co-axially within an annular metering chamber that surrounds the valve stem assembly and forms a substantially cylindrical chamber body. The metering valve also has an outer seal at the top of the cylindrical chamber body and an inner seal at the bottom of the cylindrical chamber body. The valve stem assembly has an outlet and an associated passage that is above the line of the outer seal when the metering valve is at rest, and is below the line of the outer seal when the metering valve is actuated, thereby creating a dispensing passage for the metering chamber's contents. The valve stem assembly has an inlet and an associated passage that is above the line of the inner seal when the metering valve is at rest, and is below the line of the inner seal when the metering valve is actuated. This arrangement controls the amount of material and fluid dispensed in each metered dose, as both passages are never open to the metering chamber at the same time. The valve stem assembly forms a straight, central passage extending from an open inner end of the valve stem assembly …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.