Patent ID: 6612773
Filing Date: 2003-09-02
Classification: E01C

Abstract:
A machine for cutting rumble strips in pavement, comprisinga main frame with a front end and a rear end, a moving frame pivotably connected to the main frame on a frame pivot pin extending between the moving frame and the main frame at a moving frame rear end, an engine mounted on the moving frame, rear wheels and front wheels disposed to engage pavement or ground beneath the machine, the rear and front wheels rotatably attached to the main frame at the main frame rear end and the main frame front end respectively, and further comprising a drive wheel, all wheels being round typical of rolling vehicles, a crank on a crankshaft mounted to the main frame, the crankshaft mechanically connected to the drive wheel such that when the drive wheel rotates as it engages the ground it causes the crankshaft to rotate with its crank rising and falling as it rotates around the crankshaft, said crank mechanically linked to the moving frame spaced apart from the pivot pin such that rotation of the crankshaft causes the crank to lift and lower the moving frame front end in oscillatory motion as the moving frame rear end remains nonoscillating in pivotal attachment to the main frame, a grinder brush mounted on the moving frame transverse to machine travel and disposed to contact the pavement as the moving frame is lowered, the grinder brush mechanically connected to the engine such that the engine causes the grinder brush to rotate, the weight of the engine driving the grinder brush into the pavement when the crank lowers the moving frame.