Injection device with simplified stopper retention
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United States of America Patent
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Jan 7, 2014
Grant Date -
Oct 1, 2009
app pub date -
Feb 25, 2009
filing date -
Aug 30, 2006
priority date (Note) -
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Abstract
An injection device including a volume for accommodating a product for administration, a piston for acting upon the product within the volume, and a stopper which can be arranged between an end of the piston facing the product and the product within the volume, wherein the piston includes a piston head configured to be sealed in a gas-tight manner, the piston head being separate from the stopper such that a negative pressure or vacuum region can be developed between the piston head and the stopper.
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