Patent ID: 8828001

Claim:
A device to penetrate living bone, comprising: a shaft, said shaft having a first end, said shaft being ductile; a cutting bit, said cutting bit formed at said shaft first end; a tubing jacket, said shaft slidably through said tubing jacket, said shaft being rotatable, said tubing jacket having an outer diameter, said tubing jacket having an inner diameter, said tubing jacket being as ductile as said shaft; a guide tube, said guide tube surrounding said tubing jacket and having a guide tube first end initially proximate said cutting bit, said tubing jacket slidably positioned for linear advancement toward said guide tube first end through said guide tube, wherein said guide tube is curved along its length at said guide tube first end, said guide tube adapted to bend said tubing jacket into a tubing jacket curvature during said linear advancement of said tubing jacket consistent to any curvature of said guide tube at said guide tube first end such that upon advancement of said tubing jacket through said guide tube first end and out of said guide tube, said tubing jacket will maintain said tubing jacket curvature imparted thereto by said guide tube; and a thrust bearing, said thrust bearing affixed and mounted to said shaft proximate said shaft first end intermediate said cutting bit and said tubing jacket, said thrust bearing having an outer diameter not greater than said tubing jacket outer diameter, said thrust bearing outer diameter being greater than said tubing jacket inner diameter.