Patent ID: 7837276

Claim:
A close proximity pavement grinding apparatus, comprising: a frame; wheels supporting the frame; a grinding head support assembly mounted laterally outward from the frame and wheels; a grinding head mounted to the grinding head support assembly having an arbor with a first end and a second end and having a plurality of blades mounted along the arbor; a grinding head motor at the first end of the grinding head and imparting rotation to the grinding head; a bearing supporting the second end of the grinding head; wherein the grinding head extends laterally from one side of the grinding apparatus beyond the frame and wheels, the grinding head pivoting about a pivot axis above the blades at the first end of the grinding head, the pivot axis being laterally inward and transverse to the arbor and laterally outward beyond the frame and wheels; wherein the grinding head support assembly comprises locking pins engaging slots to position the grinding head at a predetermined angle relative to the pavement, wherein the slots comprise concentric arcs over the grinding head and centered about the pivot axis and having inner ends that are vertically aligned above the pivot axis when the grinding head is in a horizontal position.