Patent ID: 7361156

Claim:
A pressure jacket for receiving therein a syringe comprising a cylindrical main body, a conical portion connected to the cylindrical main body, and a discharge outlet connected to the conical portion, the pressure jacket comprising: an elongated body having a proximal end configured to be removably associated with a fluid injection apparatus and a distal end comprising a radially outward extending flange; at least one locking member comprising a first end, having a radially outward extending projection, that is pivotally associated with the radially outward extending flange and a second end comprising a syringe engaging surface defining a curved groove adapted to engage a mating ridge formed on the conical portion of the syringe, the at least one locking member movable between an engaged position wherein the groove cooperates with the ridge formed on the conical portion of the syringe for preventing removal of the syringe from the elongated body and a disengaged position allowing insertion and removal of the syringe; and an actuation ring rotationally associated with the radially outward extending flange on the distal end of the elongated body and configured to move the at least one locking member between the engaged and disengaged positions, the actuation ring comprising at least one pair of tab members formed on an inner surface thereof and positioned on opposite sides of the radially outward extending projection of the first end of the at least one locking member such that rotational movement of the actuation ring causes the tab members to coact with the projection and move the at least one locking member between the engaged and disengaged positions.