Patent ID: 9452263
Filing Date: 2016-09-27
CPC Classification: A61M

Claim Text:
1. A plunger rod for an injection device comprising: a distal element having a proximal end and a distal end, a proximal element having at least one radially flexible branch, wherein the proximal element is slidingly coupled to the distal element and selectively movable in an axial direction between a restricted position of the plunger rod and an extended position of the plunger rod, and wherein said at least one flexible branch extends in the axial direction and includes a free proximal end that is displaceable radially inward, at least one transversal wall mounted at a proximal end of the proximal element, said at least one transversal wall forming a thumb press, and a lock for selectively locking the distal element and the proximal element in a plurality of relative axial positions defining a plurality of intermediate positions of the plunger rod, wherein the lock is movable from a locked state, in which the distal element and the proximal element are fixed with respect to each other in the axial direction, and an unlocked state, in which the distal element and the proximal element are displaceable in the axial direction with respect to each other, when the at least one radially flexible branch is displaced radially.