Amgen Inc.
INJECTION DEVICE FOR DRUG DELIVERY AND PACKAGING FOR THE INJECTION DEVICE

Abstract:

An injection device is provided, including a syringe having a barrel and a flange and a backstop configured to be coupled with the syringe adjacent to the flange. The backstop includes an inner surface generally extending around at least a portion of the syringe, wherein the inner surface includes at least one protrusion extending away from the inner surface and configured to engage the flange and/or the barrel to permit or promote airflow through a space between the inner surface and the syringe.