Patent ID: 7585109

Claim:
A radiographic device comprising: a base; a support arm pivotably coupled to the base and defining a support axis, the support arm being movable between a normal position and two diametrically opposed, laterally rotated positions; a radiographic head coupled to the support arm; a tension assembly coupled to the base; and a linkage system extending between the tension assembly and the support arm, the linkage system including: a hub rotatably coupled to the base and defining a center of rotation with which a lateral reference line intersects; a linkage partially entrained with the hub and having a proximal end adapted for coupling to the support arm and a distal end adapted for coupling to the tension assembly, the linkage including a pivot point joining the linkage proximal end and the linkage distal end; wherein, when the support arm is in the normal position, the linkage is positioned with respect to the hub so that the lateral reference line also intersects the linkage pivot point.