A self-propelled pavement cutting machine comprising a drive truck having a front end having an upright sliding coupling with the rear of a vehicle having an elongated cutter for cutting bumps or grooves, the vehicle having front wheels and rear wheels. When the cutter is active, the vehicle is supported by its two sets of wheels, depth control means being provided for the cutter. The truck has a pump supplying hydraulic fluid to raise and support the rear end of the vehicle with its cutter and rear wheels, the vehicle being supported then by its front wheels. When the vehicle is being pushed by the truck, side sway of the vehicle is prevented as the coupling is arranged on opposite sides of the longitudinal center of the truck and vehicle.
A road surfacing machine for removing bumps from a roadway. A sub-frame supporting a cutter head is pivotally attached to a main frame and is controllably urged downwardly into cutter head operable position. Walking beams supporting depth control wheels which ride in the surfacing cut are pivotally attached to the sub-frame. Outrigger depth control wheels are provided near the ends of the cutter head for feathering successive cuts.
A road surfacing machine for removing bumps from a roadway. A sub-frame supporting a cutter head is pivotally attached to a main frame and controllably urged downwardly into cutter head operable position. Walking beams supporting depth control wheels which ride in the surfacing cut are pivotally attached to the sub-frame. Outrigger depth control wheels are provided near the ends of the cutter head for feathering successive cuts.
An apparatus and method of using the apparatus for creating rumble strips in a surface such as asphalt or concrete, including a vehicle with an attachment coupled thereto. The attachment includes a cutter wheel having teeth thereon and a flywheel coupled with the cutter wheel. A hydraulic motor is coupled with the cutter wheel for rotating the cutter wheel and the flywheel. Eccentric cams are provided for moving the cutter wheel vertically with respect to the surface being cut, and a gear box is coupled with the eccentric cams for rotating the eccentric cams. The eccentric cams do not contact the surface being cut. The apparatus further includes a sliding assembly coupled with the cutter wheel. The sliding assembly is both horizontally and vertically movable with respect to the surface being cut.
In certain preferred embodiments, the present invention provides a grinding machine for creating depression patterns in a surface such as asphalt or concrete. The depression pattern may be a rumble strip for alerting drivers who drift off a driving lane, or may be for other uses. Use of a depression pattern (instead of protrusions) eliminates interference with snowplow operation in areas where plows are used. In the present invention, the grinding machine is based on a trolley which moves at a uniform height along a surface, and includes a forward "gauge" wheel which controls the relative grinding drum depth based on the wheel position and rotation. In a preferred embodiment, the grinding assembly is raised and lowered relative to the trolley in correspondence with the advancement of the trolley.
In certain preferred embodiments, the present invention provides a grinding machine for creating depression patterns in a surface such as asphalt or concrete. The depression pattern may be a rumble strip for alerting drivers who drift off a driving lane, or may be for other uses. Use of a depression pattern (instead of protrusions) eliminates interference with snowplow operation in areas where plows are used. In the present invention, the grinding machine is based on a trolley which moves at a uniform height along a surface, and includes a forward "gauge" wheel which controls the relative grinding drum depth based on the wheel position and rotation. In a preferred embodiment, the grinding assembly is raised and lowered relative to the trolley in correspondence with the advancement of the trolley.
