Abstract: A saw for grooving concrete includes a base supported by plurality of wheels such that a cutting guide of the base may press against the green concrete with a predetermined load. A cutter frame is pivotally mounted to the base and includes a cutting blade and drive means mounted thereto. The pivotal connection between the frame and the base is spaced from the cutting blade such that pivoting the frame with respect to the base will raise and lower the cutting blade between operative and inoperative positions. A handle is connected to the saw and extends rearwardly and upwardly therefrom such that an operator may stand behind the saw to push it during operation. The handle is pivotally mounted to the saw such that pushing the handle downwardly will cause the frame to pivot upwardly with respect to the base. The handle is telescopic and includes a pivot connection such that it may be folded to a storage or travel position.

Abstract: A saw for grooving concrete includes a base supported by a plurality of wheels such that a cutting guide of the base may press against the green concrete with a predetermined load. A cutter frame is pivotally mounted to the base and includes a cutting blade and drive means mounted thereto. The pivotal connection between the frame and the base is spaced from the cutting blade such that pivoting the frame with respect to the base will raise and lower the cutting blade between operative and inoperative positions. A handle is connected to the saw and extends rearwardly and upwardly therefrom such that an operator may stand behind the saw to push it during operation. The handle is pivotally mounted to the saw such that pushing the handle downwardly will cause the frame to pivot upwardly with respect to the base. The handle is telescopic and includes a pivot connection such that it may be folded to a storage or travel position.

Abstract: An improved suspension system for a mobile machine adapted to work a material associated with a horizontal surface includes a frame mounting a prime mover. An arbor shaft extends transversely across the frame adjacent to a front end of the machine and is drivingly connected to the prime mover. The suspension system includes a live rear axle and a front axle assembly that is extendable and retractable whereby the machine is movable between raised and lowered positions. A rotating tool is mounted on the arbor shaft. Lowering the machine from its raised position engages the tool with the material. The improvement to the suspension system comprises a support device for providing extra support to the frame when the machine is in its lowered position, the support device being adapted to stabilize the machine when the tool exerts an upward reactionary force on the machine front end.

Abstract: A pavement cutting saw is provided with a power train for accommodating high horsepower engines. A combination of pulleys, gears and coacting drive belts allows high horsepower to be delivered to a cutting tool while enabling the cutting tool to effect a deep cut and while avoiding interference between the pavement surface and any power train components. The power train may be arranged as a two-step speed reduction system to enable the engine to run at relatively high operating speeds and to allow the blade to rotate within a preferred speed range.