Hollow Core Drive Shaft Device for Core Drilling and Method of Using the Same

A method of independently anchoring a core in a drilling operation, comprising:

• placing an anchoring device through the openings of a hollow core drill motor, a hollow core drive shaft contained in the hollow core drill motor, a hollow core bit coupler, and a hollow core drill bit threadably connected to the hollow core bit coupler, said hollow core drill motor attached to a mounting carriage having a carriage travel gear thereon, said mounting carriage having an interior space therein defining an opening, said opening containing a mounting post having a gear rack thereon, said carriage travel gear engaged with the gear rack to move the mounting carriage on the mounting post;
• attaching the anchoring device to a portion of a slab;
• and
• drilling the portion of the slab with the hollow core drill bit in order to sever the portion of the slab from surrounding slab to form a core, said core contained within the hollow core drill bit, wherein the anchoring device is separate from and independent of the hollow core drill motor, the mounting carriage and mounting post contained therein, the hollow core drive shaft contained in the hollow core drill motor, the hollow core bit coupler, and the hollow core drill bit, and wherein no release of the core from within the hollow core drill bit occurs upon severance of the core from the surrounding slab.

A method of independently anchoring a core in a drilling operation, comprising:

• attaching a distal end of a drill motor drive shaft to an assembly attachment, said drill motor drive shaft contained within a drill motor, said drill motor attached to a mounting carriage having a carriage travel gear thereon, said mounting carriage having an interior space therein defining an opening, said opening containing a mounting post having a gear rack thereon, said carriage travel gear engaged with the gear rack to move the mounting carriage on the mounting post, said assembly attachment comprised of a gear box containing at least two gears, a hollow core drive shaft having an interior space defining an opening therein which threadably inserts into the hollow core drive shaft gear, a hollow core drill bit having a proximal end and a distal end and an interior space defining an opening therein, a hollow core bit coupler having an interior space defining an opening therein, said hollow core bit coupler integral to and adjacent to the proximal end of the hollow core drill bit, and a drill motor mounting bracket which attaches to the drill motor, wherein the at least two gears is a solid drive shaft gear and a hollow core drive shaft gear having an interior space defining an opening therein, wherein the drill motor drive shaft threadably inserts into the solid drive shaft gear, wherein the hollow core drive shaft threadably inserts into the hollow core drive shaft gear, wherein the hollow core drive shaft connects to the hollow core bit coupler of the hollow core drill bit, wherein power from the drill motor rotates the drill motor drive shaft which rotates the solid drive shaft gear, which rotation is transferred to the hollow core drive shaft gear to rotate the hollow core drill bit;
• placing an anchoring device through the openings of the hollow core drive shaft gear, the hollow core drive shaft, the hollow core bit coupler and the hollow core drill bit;
• attaching the anchoring device to a portion of a slab;
• and
• drilling the portion of the slab with the hollow core drill bit in order to sever the portion of the slab from surrounding slab to form a core, said core contained within the hollow core drill bit, wherein the anchoring device is separate from and independent of the mounting carriage and mounting post contained therein, the hollow core drive shaft gear, the hollow core drive shaft, the hollow core drill bit coupler, and the hollow core drill bit, and wherein no release of the core from the hollow core drill bit occurs when the core is severed from the surrounding slab.