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Metered-dose inhaler

An inhaler and dose-fixing technology, which is applied in the field of dose counters, can solve problems such as dose counter failure and dose counters not suitable for certain purposes, and achieve the effect of reducing failure rate and increasing tolerance range

Inactive Publication Date: 2010-02-24
IVAX PHARMA IRELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unavoidable deviations in component tolerances may in some cases render dose counters of the type disclosed in WO 98 / 28033 ineffective
Dose counter failures, although not common, render dose counters of the type disclosed in WO 98 / 28033 unsuitable for certain uses

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0040] The dose counter of the present invention is based on the dose counter shown in Figures 3 and 4 described above, but with the difference that the detent 60 has been modified. The modification of the pawl follows an intensive study of all elements of the inhaler. Therefore, if Figure 5 As shown, the dose counter 18 of the present invention includes: an actuator 20; a rotating gear ( Figure 5 Not all are shown in); the driver 28 is used to drive the rotary gear in a stepwise manner according to the movement of the actuator 20, the rotary gear includes a wheel 30 mounted on a main shaft (not shown), and the wheel 30 has multiple a ratchet 32; a pawl 60 to prevent reverse rotation of the rotating gear; and a display (not shown) coupled to the rotating gear having a visible array of incrementing integers on its surface that increments according to the rotating gear Each step of the stepping rotary motion can index an integer.

[0041] The wheel 30 has a plurality of ratch...

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Abstract

The present invention relates to a metered dose inhaler dose counter, the counter comprising: an actuator; a rotary gear wheel having a plurality of ratchet teeth; a driver for driving the rotary gear in a step-wise fashion in response to displacement of the actuator; a pawl that prevents reverse rotation of the rotary gear; and a display coupled to the rotary gear.

Description

technical field [0001] The present invention relates to a metered dose inhaler, and more particularly to a dose counter for a metered dose inhaler, the counter comprising: an actuator; a rotating gear; a drive for stepping in accordance with movement of the actuator way to drive a rotating gear that consists of a wheel mounted on a spindle with a plurality of ratchets around its perimeter; pawls to prevent the rotating gear from reversing; and a display coupled to the rotating gear with the display on its has a visible array of incrementing integers indexable to a single integer according to each step of the step-by-step rotational motion of the rotary gear; wherein the pawl includes at least two ratchet teeth spaced radially such that One of the teeth meshes with the ratchet of the wheel after each step of the stepped rotary motion of the rotary gear. Background technique [0002] Metered dose inhalers include pressurized metered dose inhalers (both manually operated and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06M1/04G06M1/08
CPCG06M1/04A61M2015/0078A61M15/009A61M15/0078Y10T74/1526A61M15/00G06M1/08A61J7/02
Inventor D·芬伦
Owner IVAX PHARMA IRELAND
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