Metered dose inhalers
US10029845B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2016 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Feb 22, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/1268
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention addresses the problem of turbophoresis and provides a relatively simple and low cost solution for a metered dose inhaler, in particular, a pressure-actuated metered dose inhaler. A metering valve (100) comprises a valve body (110), a valve stem (130) mounted within the valve body (110) and a spring element (140) for biasing the valve stem (130) in an “at rest” position. A pre-metering region (170) is formed in the valve stem (130) which is provided with a miniature valve seal (210) at its inlet (180). The miniature valve seal (210) effectively isolates the pre-metering region (170) from surrounding bulk formulation (4) within a canister (1) in which the metering valve (100) is mounted when the valve stem (130) is in the “at rest” position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.