Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Robert Frederick Veasey0
Christopher John Jones0
Date of Patent
April 5, 2011
0Patent Application Number
108200470
Date Filed
April 8, 2004
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A drive mechanism for use in a drug delivery device comprising an epicyclic gearbox. This drive mechanism includes a housing having a helical thread; a piston rod having a non-circular cross section and an external helical thread; a dose dial sleeve, which is threadedly engaged with the housing and being rotatable with respect to the housing; and a drive sleeve, located between the housing and the piston rod, which is threadedly engaged with the piston rod.
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