Patent ID: 8864712

Claim:
An injector assembly comprising: a) a syringe comprising: i) a barrel having an open rearward end and a closed forward end that terminates in a discharge extension; and ii) a plunger disposed within the barrel and movable between the rearward end of the barrel and the forward end of the barrel; and b) a front-loading, medical fluid injector comprising: i) an injector housing having an opening defined therein; ii) a drive ram, at least a portion of which is movable into and out of the injector housing through the opening in the injector housing, wherein the syringe is in contact with the medical fluid injector such that the plunger of the syringe is substantially aligned with the drive ram of the injector and such that the plunger of the syringe is located between the drive ram of the injector and the discharge extension of the barrel of the syringe; iii) an arm movable between a closed position and an open position, wherein the arm is engaged with the barrel of the syringe in the closed position, and wherein the arm is spaced from the barrel of the syringe in the open position; and iv) a spring that biases the arm to the open position, wherein the spring provides a force that opposes rotation of the syringe in a first direction and relative to the injector housing when installing the syringe on the injector housing and where the arm is disposed in the closed position, and wherein the force from the spring does not oppose rotation of the syringe in a second direction and relative to the injector housing for removal of the syringe from the injector housing and where the arm is disposed in the open position, the second direction being substantially opposite of the first direction.