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Indicating device
| Details |
Inventors: Rand, Paul K.; Osterweil, Carole A.; Newell, Robert E.;
Assignee: Glaxo Group Limited (London, GB2)
Primary Examiner: Rolla; Joseph J.
Assistant Examiner: Huson; Gregory L.
Attorney, Agent or Firm: McAulay, Fields, Fisher, Goldstein & Nissen
A device is described for indicating the number of doses dispensed from an aerosol container (2, 102) having an outlet valve member (4, 104) movable relative to the body of the container to dispense its contents in measured doses. Relative movement between the aerosol container body and the outlet member are detected by a ratchet wheel (14, 114) and ratchet driving member (11A, 111) which move with the body and outlet member respectively or vice versa. The ratchet wheel may in turn drive an indicating member in the form of a linear rack (20, 119, 120) or rotatable wheel (116). |
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DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS The inhalation device shown in FIGS.
1 and 2 comprises a tubular housing 1 in which an aerosol container 2 can be located.
The housing is open at one end (which will hereinafter be considered to be the top of the device for convenience of description) and is closed at the other.
An outlet 3 leads laterally from the closed end of the housing 1.
In the embodiment illustrated, the outlet 3 is in the form of a mouthpiece intended for insertion into the mouth of the patient, but it may, if desired, be designed as a nozzle for insertion into the patient's nostril.
The aerosol container 2 has an outlet valve member 4 at one end.
This valve member can be depressed to release a measured dose from the aerosol container or, alternatively, the valve member 4 can be fixed and the main body of the container can be moved relative to the valve member to release the dose.
As shown clearly in FIG.
1, the aerosol container 2 is located in the housing 1 so that one end protrudes from its open top.
Spacer ribs (not shown) may be provided inside the housing to hold the external surface of the contaienr 2 spaced from the internal surface of the housing 1.
A support 5 is provided at the lower end of the housing 1 and has a passage 6 in which the valve member 4 of the aerosol container 2 can be located and supported.
A second passage 7 is provided in the support 5 and is directed towards the interior of the outlet 3.
Thus, when the parts are in the positions shown in FIGS.
1 and 2, the protruding portion of the aerosol container 2 can be depressed to move the container relative to the valve member 4 to open the valve and a dose of medicament contained in the aerosol will be discharged through the passage 7 and into the outlet 3 from which it can be inhaled by a patient.
One dose will be released from the aerosol container each time it is fully depressed.
FIGS.
1 and 2 also show an embodiment of the dose indicating device of the present invention.
This device A comprises an actuator member in the form of a ring-shaped cap member 8 which is removably located on the end of the protruding portion of the body of the aerosol container 2
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Communications 
