| abstract |
A syringe (2) including a barrel (4) with discharge end (5) defining a discharge passage, plunger (12) being adapted to move axially within the barrel and capable of displacing fluid from the chamber through the discharge end; the plunger includes a control arm (22, 24) including a first releasable stop element and a second non-releasable stop element, the first and second stops are both axially spaced from the rear end of the plunger, the control arm has a first configuration in which the first stop element is axially aligned with a stop surface (32) defined by a part of the barrel (4), the first stop element is adapted to limit the axial movement of the plunger; and a second configuration in which the first stop element is disposed out of alignment with the stop surface and the second stop element is axially aligned with the stop surface, the second stop element is adapted to limit the plunger movement from the first stop element to the second stop element. |