Patent ID: 8459898

Claim:
A paving machine configured to move in a paving direction for spreading, leveling and finishing concrete into a form having a generally upwardly exposed, finished concrete surface and terminating in lateral concrete sides, the paving machine comprising a main frame including a center module, a bolster laterally movably connected to respective lateral sides of the center module for changing a spacing between the bolsters, a crawler track for respective aft and forward ends of the bolsters, a bolster swing leg for each crawler track, an upright jacking column secured to the swing leg proximate a free end thereof, and a rotary connection between the jacking column and the crawler track permitting relative rotational movements of the crawler track and the jacking column about an upright axis, a hinge bracket interposed between each swing leg and an associated surface of the bolsters and including an upright pivot shaft that engages the swing leg permits pivotal movements of the swing leg relative to the hinge bracket about an upright axis in a substantially horizontal plane, the hinge bracket including a pivot connection point that is laterally spaced from and fixed in relation to the pivot shaft, and a length-adjustable holder capable of being held at a fixed length having a first end pivotally engaging the pivot connection point and a second end pivotally engaging the swing leg, the holder permitting pivotal motions of the swing leg about the hinge pin when in its length-adjustable configuration and preventing substantially any motion of the swing leg when the holder is in its fixed-length configuration.