Patent ID: 7942142
Filing Date: 2011-05-17
Classification: B28D,E01C

Abstract:
1. A concrete saw comprising: a frame having a pair of rear wheels and a pair of front wheels for facilitating movement of the saw to different locations for use and for movement during a cutting operation; a first electric motor mounted by the frame and being operably connectable to a battery pack for receiving power therefrom, a battery powered transmission for connecting the first electric motor to driving the rear wheels to provide self-propulsion of the saw; a pair of saw arbors respectively mounted for rotation on opposite lateral sides of the frame forward of the pair of front wheels, and the saw arbors having a rotational connection to the first electric motor to provide rotative driving thereof; and a power actuator including a hydraulic cylinder for moving the front wheels upwardly and downwardly with respect to the frame to pivot the frame about the rear wheels between an upper idle position and a lower use position that permits cutting of concrete or the like with a saw blade mounted on one of the arbors, a hydraulic pump that operates the hydraulic cylinder, and a second electric motor being powered from the battery pack for driving the hydraulic pump.