Wilmont, John G.,Hill, Robert L.,Griffiths, Steven M.
申请号：
AU2010202619
公开号：
AU2010202619B2
申请日:
2010.06.23
申请国别(地区):
AU
年份:
2012
代理人:
摘要：
#$%^&*AU2010202619B220121129.pdf#####ABSTRACT An automatic injection device containing a pre-loaded charge of medicament for automatically administering the medicament upon actuation thereof The device comprises a housing and a medicament chamber disposed in the housing. The medicament chamber has a first compartment and a second compartment, the first compartment containing a first medicament portion and the second compartment containing a second medicament portion to be mixed with the first medicament portion. A seal structure is provided between the first compartment and the second compartment, the seal structure initially in a sealing condition that maintains the first compartment separate from the second compartment, the seal structure converting to a mixing condition in response to activation of the device. A needle assembly dispenses the medicament charge from the medicament chamber. The needle assembly comprises a needle and a needle support, the needle support for mounting the needle assembly to the medicament chamber. The needle support defines a needle assembly chamber having a rearward opening in fluid communication with the medicament chamber, the rearward opening having the smallest diameter opening through which fluid flows from the medicament chamber to the rearward opening. The needle assembly chamber has an inner surface tapering radially inwardly as it extends axially forward toward a rearward end of the needle, the needle support having a passageway connecting the needle assembly chamber to the needle. The inner surface of the needle assembly chamber has a diameter at the connection to the passageway that equals the diameter of the passageway. An activation assembly is disposed in the housing. Activation of the activation assembly causes (1) the seal structure to be converted from the sealing condition to the mixing condition, (2) the first and second medicament portions to be mixed, and (3) the mixed
