초록 ▼

A soil mixing apparatus that requires less drilling force comprises a shaft, a plurality of cutting blades, an excavation blade, an auger bit, a shear blade having an extendible finger. The cutting blades, excavation blade and auger bit are attached to rotate with the shaft. The shear blade is attac

A soil mixing apparatus that requires less drilling force comprises a shaft, a plurality of cutting blades, an excavation blade, an auger bit, a shear blade having an extendible finger. The cutting blades, excavation blade and auger bit are attached to rotate with the shaft. The shear blade is attached at a fixed longitudinal position along the shaft. The shear blade provides a variable length by attaching different length fingers that are adjustable to the soil conditions in which the mixing apparatus is used. The shear blade is also mounted to the shaft at an angle such that the shear blade rotates in the same direction as the excavation blade and the cutting blades, but at a much slower rotation rate.

대표청구항 ▼

A drilling apparatus for producing a pile with ribs, the drilling apparatus comprising: a hollow shaft having a first and second ends, and a port proximate the first end; an auger bit attached at the first end of the shaft to rotate with the shaft; an excavation blade attached to rotate with the sha

A drilling apparatus for producing a pile with ribs, the drilling apparatus comprising: a hollow shaft having a first and second ends, and a port proximate the first end; an auger bit attached at the first end of the shaft to rotate with the shaft; an excavation blade attached to rotate with the shaft, the excavation blade attached proximate the auger bit; a cutting blade attached to rotate with the shaft; and a shear blade having a first end and a second end, the shear blade mounted about the shaft at a fixed longitudinal position such that the shear blade can rotate about a longitudinal axis of the shaft independent of rotation of the shaft, the length of the shear blade being greater than the excavation blade such that the first and second ends of the shear blade extend radially outward from the shaft beyond the excavation blade, and the first and second ends of the shear blade are each positioned in a plane angled from a horizontal plane, the first and second ends of the shear blade being adjustable in position between a position parallel to the horizontal plane and a position perpendicular to the horizontal plane.