| 摘要 |
A substance dispensing device associated with a usage indicator is disclosed. The device includes a substance storage container and a pump operable to dispense substance from the container. The usage indicator includes a movable member that is movable in response to operation of the pump. The movable member includes an indicator providing a visual indication of the extent to which substance has been dispensed from the device. The actuator includes a drive having a pair of axially spaced lugs and the reactive means includes two series of teeth formed with the movable member, one of the two series of teeth for each of the pair of lugs, the pair of lugs being spaced axially so that only one of the pair of lugs can engage a tooth of its respective series of teeth at any one time.
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