Syringe plunger engagement mechanism

A method for engaging a syringe plunger with a piston head of a fluid injector system, the method comprising:

• advancing the piston head at least partially into an interior cavity of the syringe plunger;
• and
• advancing a cam sleeve disposed in the piston head in an axial direction relative to the piston head,
• wherein the advancing of the cam sleeve causes one or more pins at least partially disposed in one or more tracks of the cam sleeve to move from a first, disengaged position, wherein the one or more pins are radially withdrawn into the piston head, to a second, engaged position, wherein the one or more pins protrude radially outward to engage at least a portion of the syringe plunger.

A plunger engagement mechanism for a piston head of a fluid injector system, the plunger engagement mechanism comprising:

• a cam sleeve movable relative to the piston head, the cam sleeve having one or more tracks defining a cam surface;
• an actuator operatively connected to the cam sleeve for moving the cam sleeve relative to the piston head;
• and
• one or more pins at least partially disposed in and moveable within the one or more tracks of the cam sleeve,
• wherein movement of the cam sleeve causes movement of the one or pins within the one or more tracks, the one or more pins moveable between a first, disengaged position, wherein the one or more pins are radially withdrawn into the piston head, and a second, engaged position, wherein the one or more pins protrude radially outward relative to an outer surface of the piston head.