DOSE COUNTERS FOR INHALERS, INHALERS AND SHAFTS THEREOF

A manually operated measured dose inhaler (12) includes a dose counter chamber (66) including a dose display tape (112) driven by a ratchet wheel (94) which is driven in turn by an actuator pawl (80), actuated by movement of a canister (20); two-step ribs (144, 146) being provided to prevent rocking...

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Bibliographische Detailangaben
Hauptverfasser:	BUCK,DAN D, KAAR,SIMON S, DEREK,FENLON F, KARG,JEFFREY, A. JA, CLANCY,PAUL P, USCHOLD,ROBERT,CHARLES RC, HAZENBERG,JAN,GEERT JG, WALSH,DECLAN D
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CALCULATING COMPUTING COUNTING COUNTING MECHANISMS COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE PHYSICS
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Beschreibung
Zusammenfassung:	A manually operated measured dose inhaler (12) includes a dose counter chamber (66) including a dose display tape (112) driven by a ratchet wheel (94) which is driven in turn by an actuator pawl (80), actuated by movement of a canister (20); two-step ribs (144, 146) being provided to prevent rocking of the canister (20); a drain hole (194) being provided for preventing misting of a display window (118); and frictional surfaces (132, 134) being provided on a shaft (108) of a tape stock bobbin (110) to prevent tape slippage; a rotation regulator being provided for the stock bobbin and comprising a wavelike engagement surface (300) with concavities (302) which engage against control elements (128, 130) in the form of protrusions on resilient forks of a split pin (108) thereby permitting incremental unwinding of the stock bobbin yet resisting excessive rotation if the inhaler is dropped onto a hard surface.