Dose counters for inhalers, inhalers and methods of assembly thereof
US9526850B2 · kind B2 · utility
0Cited by
9References
10Claims
0Family size
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Key dates
| Filing date | Dec 11, 2013 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Dec 11, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A manually operated metered dose inhaler includes a dose counter chamber including a dose display tape driven by a ratchet wheel which is driven in turn by an actuator pawl actuated by movement of a canister, the tape unwinding from a stock bobbin during use of the inhaler, a rotation regulator being provided for the stock bobbin and including a wavelike engagement surface with concavities which engage against control elements in the form of protrusions on resilient forks of a split pin thereby permitting incremental unwinding of the stock bobbin yet resisting excessive rotation if the inhaler is dropped onto a hard surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.