A medical fluid injector, replaceable syringe, and coupling mechanism to engage the syringe plunger to the plunger drive ram of the injector are provided wherein coupling involves a cam cleat-like mechanism, thereby allowing for cooperative movement between the plunger drive ram and syringe plunger....http://www.google.es/patents/US6196999?utm_source=gb-gplus-sharePatente US6196999 - Syringe/plunger coupling
