Manhole casting removing device
OwnerRobert Juryinventor
Life of this patent
Estimating the term…
Abstract
A device for cutting through pavement in order to remove a manhole casting during the repaving of a road surface so that the manhole casting may be raised or lowered to correspond with the elevation of the new road surface. The device is mounted on a conventional road grader that has been modified to accommodate the device and is positioned over the manhole casting so that the existing pavement and cement may be cut from the road surface and the manhole casting removed to permit bricks to be laid on or removed from the manhole so as to raise or lower the manhole so that the manhole casting's height will correspond with the elevation of the new road surface.
Claims5
A manhole casting removing device comprising a main frame, motor means on said main frame, wheels supporting one end of said main frame driven by said motor means, steerable wheels supporting the other end of said main frame, a hydraulic motor supported by said main frame, a hollow cylindrical cutting tool, having a constant diameter throughout its entire cylindrical length slightly larger than the manhole casting to be removed and having its axis in a vertical position, attached to and driven by said hydraulic motor, said hydraulic motor being positioned exteriorly of said cutting tool, said cylindrical cutting tool being provided with a plurality of cutting teeth means, said cutting teeth means for cutting a narrow cylindrical ring around said manhole casting, said cutting teeth means being on the lower peripheral edge of said cylindrical cutting tool, means for raising and lowering said cutting tool, and means for moving said cutting tool laterally of said main frame.
Dependencies are inferred from the claim text.