Dose indicator for a metered dose inhaler
Assignee3M Innovative Properties Company
InventorStephen J. Howgill
Life of this patent
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Abstract
The present disclosure relates to a dose indicator comprising, a chassis comprising a chassis frame and a displacement portion, an indexable first display unit, mountable on the chassis, the first display unit being indexable about a first display axis, the indexable first display unit comprising a plurality of indexing teeth, a first display non-return arm, and a drive pawl connected at its proximal part to the displacement portion, the drive pawl comprising a socket at its distal part, the socket being adapted to engage an indexing tooth of the first display unit during indexing. The disclosure further relates to an actuator for an inhaler, wherein the actuator comprises a dose indicator as described above. The present disclosure is also directed to an inhaler comprising such actuator.
Claims35
A dose indicator comprising,
- a chassis comprising a chassis frame and a displacement portion,
- an indexable first display unit, mountable on the chassis, the first display unit being indexable about a first display axis, the indexable first display unit comprising a plurality of indexing teeth,
- a first display non-return arm, and
- a drive pawl connected at its proximal part to the displacement portion, the drive pawl comprising:
- a socket formed in its distal part, the socket being adapted to partially surround and engage a first indexing tooth of the first display unit during indexing, and
- an outer surface connecting the proximal part and the distal part, the outer surface adapted to contact a second indexing tooth during resetting of the pawl after indexing.
Dependencies are inferred from the claim text.