Dose counter for inhaler having an anti-reverse rotation actuator
AssigneesIvax Pharmaceuticals Ireland, Norton (Waterford) Limited, Teva Pharmaceuticals Ireland
InventorsDeclan Walsh, Derek Fenlon, Simon Kaar, Jan Geert Hazenberg, Dan Buck, Paul Clancy, Robert Charles Uschold, Jeffrey A. Karg
Life of this patent
Estimating the term…
Abstract
An incremental dose counter for a metered dose inhaler having a body arranged to retain a canister for movement of the canister relative thereto, the incremental dose counter having a main body, an actuator arranged to be driven and to drive an incremental output member in a count direction in response to canister motion, the actuator being configured to restrict motion of the output member in a direction opposite to the count direction.
Claims28
A dose counter for an inhaler comprising:
- a counter display comprising a tape including dosage information, a drive system arranged to move the counter display incrementally in a first direction from a first station to a second station in response to actuation input, wherein a regulator is provided which is arranged to act upon the counter display at the first station to regulate motion of the counter display at the first station to incremental movements,
- wherein the first station comprises a first shaft, the tape being arranged on the first shaft and to unwind therefrom upon movement of the counter display, and the first shaft is mounted for rotation relative to a substantially rotationally fixed element of the dose counter, and
- wherein the regulator comprises at least one projection on one of the fixed element and first shaft, and a wavelike engagement surface including incrementally spaced formations located around a periphery of the other of the fixed element and first shaft for engaging with the projection to accomplish incremental movements of the counter display.
Dependencies are inferred from the claim text.