Setting utility access covers

Abstract

Apparatus and method of setting access covers to grade wherein the apparatus includes rubblizing bits and a vacuum, the first rubblizing bit having a central core with attached carriers for teeth to grind the underlying material into small pieces, a second rubblizing bit to rubblize below the ring of the access, a third bit for trimming a step for a T-lock, and a fourth bit for milling around an access ring for resurfacing and the steps of rubblizing down to the area of the bottom of the ring and sucking out the material by vacuum, settting the height of the ring and cover, trimming a step for a T-lock, and milling around the ring and cover a selected distance.

1 . A rotary bit for rubblizing the material around a utility access cover and ring down to the flange of the ring by rotary grinding, comprising a cylindrical central core having an inside diameter that is larger than the outside diameter of the ring and at least one carrier having an attachment surface that is perpendicular to the outside surface of the cylindrical central core and extending beyond the outside diameter of the central core with a plurality of rubblizing teeth attached to and extending below the attachment surface.  
   
   
       2 . A bit in accordance with  claim 1  wherein some of the rubblizing teeth extend below the flange when the bit is in contact with the flange.  
   
   
       3 . A bit in accordance with  claim 2  wherein the carrier comprises a mounting plate at the top for attaching to the central core, a vertical plate that extends down the outside surface of the cylindrical central core, and an attachment plate extending out at a 90° angle from the vertical plate near the bottom on the central core and providing the attachment surface for the teeth.  
   
   
       4 . (canceled)  
   
   
       5 . (canceled)  
   
   
       6 . (canceled)  
   
   
       7 . A bit in accordance with  claim 3  wherein the plurality of teeth include a first row of teeth mounted near the outside edge of the attachment plate and angled forward toward the direction of rotation of the bit and angled outwardly with the tips of the teeth extending beyond the outer edge of the attachment plate.  
   
   
       8 . A bit in accordance with  claim 7  wherein the plurality of teeth include a second row of teeth inside the outside row of teeth and having tips above the tips of the outside row.  
   
   
       9 . A bit in accordance with  claim 8  wherein teeth are attached to the bottom of the attachment plate between the second row and the central core.  
   
   
       10 . A bit in accordance with  claim 9  wherein the central core is open at the bottom and has a surface around the bottom and further comprising a plurality of teeth attached to the surface.  
   
   
       11 . A bit in accordance with  claim 10  wherein the tips of the teeth in the second row extend below the tips of the teeth on the bottom surface of the central core and the tips of the teeth of the first row extend below the tips of the teeth in the second row.  
   
   
       12 . A rotary bit for rubblizing the material below the flange of the ring of a manhole and down to below the top of the cone of the manhole comprising a cylindrical central core having teeth on a surface at the bottom of the cylinder, the central core having an inside diameter that is greater than the outside diameter of the cone, a plurality of carriers, each having a horizontal attachment plate extending out from the vertical cylindrical surface of the central core and positioned at a selected distance from the top of the central core, a plurality of teeth attached to the underside of the attachment plate for grinding a step in the surface of the roadway beyond the outside diameter of the central core.  
   
   
       13 . A rotary bit having a cylindrical central core with an outside surface and open at the bottom, an attachment plate extending a selected distance beyond the outside diameter of the central core and at a 90° angle to the outside surface of the cylindrical core, and a plurality of teeth attached to the underside of the attachment plate.  
   
   
       14 . A bit in accordance with  claim 13  further comprising teeth on the bottom surface of the central core to grind into the material around the ring to stabilize the bit in use.  
   
   
       15 . A bit in accordance with  claim 14  wherein the selected distance is 12 inches.  
   
   
       16 . The method of setting manhole covers, the manhole having a cone, a ring and a cover, comprising the steps of rubblizing the material around the ring and cover by a rotary grinder and removing the rubblized material by a vacuum machine to form an excavated area around the ring.  
   
   
       17 . The method in accordance with  claim 16  wherein the grinding rubblizes the material down to at least the flange of the ring.  
   
   
       18 . The method in accordance with  claim 16  wherein the rubble is removed while the grinding is taking place.  
   
   
       19 . The method in accordance with  claim 17  comprising the further step of grinding down below the top surface of the cone to rubblize the material below the material rubblized in the first rubblizing step.  
   
   
       20 . The method in accordance with  claim 19  further comprising the step of removing the rubblized material below the material rubblized in the first rubblizing step.  
   
   
       21 . The method in accordance with  claim 20  wherein the rubblized material is removed by sucking up the material with a vacuum.  
   
   
       22 . The method in accordance with  claim 20  comprising the further step of removing the ring, cover and any height adjusting material from the excavated hole.  
   
   
       23 . The method in accordance with  claim 22  comprising the further steps, determining the distance between the top surface of the ring and the bottom surface of the flange on the ring, inserting a height adjusting form on the top surface of the cone, placing a cutter inside the form with the depth of the cutter referenced to the surface of the roadway, cutting the form at a height determined to place the top of the ring aligned with the surface of the roadway, removing the cutter and the top cut portion of the form, inserting the ring and cover on top of the form and filling the evacuated area around the top of the cone, form and ring to the surface of the roadway.  
   
   
       24 . The method of  claim 23  wherein the filling steps include pouring concrete into the area up to the level of the bottom of the flange and filling the rest of the area with asphalt.  
   
   
       25 . The method in accordance with  claim 23  wherein the area is filled with concrete to the surface of the roadway.  
   
   
       26 . The method in accordance with  claim 23  wherein the area is filled with asphalt to the surface of the roadway.  
   
   
       27 . The method in accordance with  claim 16  further comprising the step of milling the road surface to a selected depth and out a selected distance from the outside diameter of the hole.  
   
   
       28 . The method in accordance with  claim 27  wherein the milling is performed during the step of drilling down beyond the top of the cone.  
   
   
       29 . The method of  claim 27  comprising the further step of filling the area milled with the same material as the roadway.  
   
   
       30 . The method of milling around an access ring and cover comprising the steps of grinding a hole around the ring to stabilize and position the milling bit and milling out a selected distance and depth by grinding the material with a rotating bit.  
   
   
       31 . Apparatus for setting utility covers comprising a rubblizing bit as means for grinding the material into small pieces around the utility access cover and ring and down to a selected depth and means for sucking out the small pieces.  
   
   
       32 . A trimmer bit for milling around a ring and cover of a utility access for resurfacing the roadway around the access comprising a central core with teeth to position and stabilize the trimmer and teeth attached to an attachment plate extending out a selected distance from the core.  
   
   
       33 . The method of removing the material above a cone of a manhole comprising the steps of rubblizing the material above the cone and out a selected distance beyond the outer periphery of the top of the cone and removing the rubblized material by a vacuum machine.