Dose counters for inhalers, inhalers and methods of assembly thereof
US8978966B2 · kind B2 · utility
18Cited by
2References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 18, 2011 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Jan 13, 2032 |
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.