Dose counters for inhalers, inhalers and methods of assembly thereof
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United States of America Patent
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Nov 3, 2015
Issued Date -
N/A
app pub date -
Dec 11, 2013
filing date -
May 18, 2010
priority date (Note) -
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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.
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