Michael Helmer,Christoph Eisengarthen,Winfried Huthmacher,Carsten Mosebach
申请号：
US15620993
公开号：
US20170281874A1
申请日:
2017.06.13
申请国别(地区):
US
年份:
2017
代理人:
摘要：
A drug delivery device (1) is provided comprising a housing (4) comprising a distal end and a proximal end and a cartridge (3) adapted and arranged to contain at least one dose of a drug (16), a bung (5) being movably arranged within the cartridge (3). In an initial state of the device (1), the bung (5) is arranged in a proximal end position with respect to the cartridge (3). The device (1) further comprises a piston rod (9) adapted and arranged to move the bung (5) in the distal direction with respect to the cartridge (3) for delivering a dose of the drug (16). The device (1) further comprises a mechanism operable such that, after a dose delivery operation was completed, the piston rod (9) is moved into the proximal direction with respect to the bung (5) by a back off distance (D), wherein in the initial state, a distance between a distal end of the piston rod (9) and a proximal end of the bung (5) is greater than zero, with the distance between the piston rod (9) and the bung (5) in the initial state being defined by the back off distance (D). Furthermore, a method for assembling a drug delivery device (1) is provided.
