Medical injection devices
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United States of America Patent
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Aug 23, 2005
Grant Date -
N/A
app pub date -
Feb 15, 1999
filing date -
Feb 14, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A firing device has a housing (10, 20) for an injector (1) with a trigger (4) whose action to eject a dose from its needle (2) is forwards against a resistance. The housing contains a spring (24) which acts on an axially movable locator (23) for the injector (1) that co-operates with its trigger (4). The device is primed by compressing the spring (24), the injector then being latched in a rearward position. Release of the catch (28) causes the spring (24) first to propel the injector (1) forwards, acting through the locator (23) and trigger (4), until the needle (2) is projected, and then to overcome the resistance to the trigger (4) to actuate that and cause a dose to be ejected.
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