Patent ID: 8672001

Claim:
A stump grinder machine comprising: a stump grinder frame; a disc defining a central axis, a radial direction and an angular direction, the disc including a peripheral edge and having defined therein a first receiving recess located at the peripheral edge of the disc; a first bit holder mechanically connected to the disc at the peripheral edge of the disc, the first bit holder defining a first bit holder hole, wherein the first bit holder is L-shaped and has a first arm and a second arm connected to form a generally right angle, the first arm having defined therein the first bit holder hole of the bit holder and the second arm sized, shaped and/or structured to be received in the first receiving recess; a first bit defining a first bit hole; wherein the second arm comprises a bit receiving surface structured, sized, shaped and/or located to abut the first bit when the first bit is mechanically connected to the bit holder; a first connection hardware set; wherein: the first connection hardware set includes an elongated member; the first connection hardware set is structured and located to detachably mechanically connect the first bit to the first bit holder; the first connection hardware set includes an elongated member located to extend: (i) through the first bit holder hole of the first bit and, (ii) into the first bit holder hole of the first bit holder; the disc is rotationally mechanically connected to the stump grinder frame so that the disc can rotate about the central axis; and the stump grinder frame, the disc, the first bit holder and the bit are structured, located, sized, shaped and/or connected so that the stump grinder can be used to grind a stump that is in the ground.