Patent ID: 7451757

Claim:
An improved concrete cutter comprising a chassis that is movable; an operator seat mounted to the chassis; operator control means located on the chassis, such control means being operable to move the chassis in a first direction along a surface to be cut; a primary boom attached to the moving chassis, the primary boom being attached to the chassis such that the primary boom is generally perpendicular to the first direction; a first secondary boom, the first secondary boom being attached to the primary boom by a first secondary boom hinge, the first secondary boom hinge being operable to permit the secondary boom to align with the primary boom; a second secondary boom, the second secondary boom being attached to the primary boom by a second secondary boom hinge, the second secondary boom hinge being operable to permit the secondary boom to align with the primary boom; means for placing said secondary booms in longitudinal alignment with said primary boom and for retracting said secondary booms from longitudinal alignment with said primary boom; at least one concrete cutting sub-assembly attached to the primary boom or one of the secondary booms, the at least one concrete cutting sub-assembly comprising: a side plate; a motor mount plate having a first end that is pivotally mounted to the side plate and a second end; a saw motor attached to the second end of the motor mount plate, the saw motor being operable to drive a motor shaft and a saw; a profile wheel assembly attached to the motor mount plate between the first end of the motor mount plate and the second end of the motor mount plate, the profile wheel assembly being adjustable to permit adjustment of the cutting depth of the saw; a ram attached to the motor mount plate, the ram being operable to maintain pressure on the profile wheel assembly such that the profile wheel assembly maintains contact with the surface to be cut; and means for moving the at least one concrete-cutting sub-assembly along the primary boom and along the secondary booms in a second direction that is generally perpendicular to the first direction.