Simon G. Kaar,Jeffrey A. Karg,Timothy Norman Johnson,Robert Charles Uschold
申请号：
US14132918
公开号：
US09216261B2
申请日:
2013.12.18
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A dose counter for counting doses of medicament dispensed by or remaining in a metered-dose inhaler. The dose counter includes: a rotatably mounted gear wheel having a circular arrangement of ratchet teeth a display coupled to the gear wheel, the display having a visible array of dose counting indicia indexable in response to rotary motion of the gear wheel and an actuator mechanism having a driver for rotatably driving the gear wheel in response to the dispensation of a medicament dose, the driver being arranged to engage the ratchet teeth of the gear wheel. The actuator mechanism includes a pivotally mounted lever having an input portion. The lever is arranged to amplify a linear stroke at the input portion such that a linear stroke of the driver exceeds the linear input stroke. By amplifying the stroke, the risk of undercounting due to insufficient stroke length may be reduced.
